update dependencies

Reviewed-on: lavina/lavina#75

.gitea/workflows/test-pr.yml

@@ -12,7 +12,7 @@ jobs:
       uses: https://github.com/actions-rs/cargo@v1
       with:
         command: fmt
-        args: "--check -p mgmt-api -p lavina-core -p projection-irc -p projection-xmpp -p sasl"
+        args: "--check --all"
     - name: cargo check
       uses: https://github.com/actions-rs/cargo@v1
       with:

.gitignore

@@ -1,4 +1,4 @@
 /target
-/db.sqlite
+*.sqlite
 .idea/
 .DS_Store

.pre-commit-config.yaml

@@ -0,0 +1,21 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: check-toml
+      - id: end-of-file-fixer
+      - id: fix-byte-order-marker
+      - id: mixed-line-ending
+      - id: trailing-whitespace
+
+  - repo: local
+    hooks:
+      - id: fmt
+        name: fmt
+        description: Format
+        entry: cargo fmt
+        language: system
+        args:
+          - --all
+        types: [ rust ]
+        pass_filenames: false

.run/Run lavina.run.xml

@@ -0,0 +1,21 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Run lavina" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="command" value="run --package lavina --bin lavina -- --config config.toml" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <envs>
+      <env name="RUST_LOG" value="debug" />
+    </envs>
+    <option name="emulateTerminal" value="true" />
+    <option name="channel" value="DEFAULT" />
+    <option name="requiredFeatures" value="true" />
+    <option name="allFeatures" value="false" />
+    <option name="withSudo" value="false" />
+    <option name="buildTarget" value="REMOTE" />
+    <option name="backtrace" value="FULL" />
+    <option name="isRedirectInput" value="false" />
+    <option name="redirectInputPath" value="" />
+    <method v="2">
+      <option name="CARGO.BUILD_TASK_PROVIDER" enabled="true" />
+    </method>
+  </configuration>
+</component>

Cargo.toml

@@ -10,7 +10,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.0.2-dev"
+version = "0.0.3-dev"
 
 [workspace.dependencies]
 nom = "7.1.3"
@@ -18,8 +18,8 @@ assert_matches = "1.5.0"
 tokio = { version = "1.24.1", features = ["full"] } # async runtime
 futures-util = "0.3.25"
 anyhow = "1.0.68" # error utils
-nonempty = "0.8.1"
+nonempty = "0.10.0"
-quick-xml = { version = "0.30.0", features = ["async-tokio"] }
+quick-xml = { version = "0.32.0", features = ["async-tokio"] }
 lazy_static = "1.4.0"
 regex = "1.7.1"
 derive_more = "0.99.17"
@@ -27,10 +27,13 @@ clap = { version = "4.4.4", features = ["derive"] }
 serde = { version = "1.0.152", features = ["rc", "serde_derive"] }
 tracing = "0.1.37" # logging & tracing api
 prometheus = { version = "0.13.3", default-features = false }
-base64 = "0.21.3"
+base64 = "0.22.0"
 lavina-core = { path = "crates/lavina-core" }
 tracing-subscriber = "0.3.16"
 sasl = { path = "crates/sasl" }
+chrono = "0.4.37"
+reqwest = { version = "0.12.0", default-features = false, features = ["json"] }
+opentelemetry = "0.22.0"
 
 [package]
 name = "lavina"
@@ -58,8 +61,14 @@ projection-irc = { path = "crates/projection-irc" }
 projection-xmpp = { path = "crates/projection-xmpp" }
 mgmt-api = { path = "crates/mgmt-api" }
 clap.workspace = true
+opentelemetry.workspace = true
+opentelemetry-semantic-conventions = "0.14.0"
+opentelemetry_sdk = { version = "0.22.1", features = ["rt-tokio"] }
+opentelemetry-otlp = "0.15.0"
+tracing-opentelemetry = "0.23.0"
+chrono.workspace = true
 
 [dev-dependencies]
 assert_matches.workspace = true
 regex = "1.7.1"
-reqwest = { version = "0.11", default-features = false }
+reqwest.workspace = true

config.0.toml

@@ -0,0 +1,30 @@
+[telemetry]
+listen_on = "127.0.0.1:8080"
+
+[irc]
+listen_on = "127.0.0.1:6667"
+server_name = "irc.localhost"
+
+[xmpp]
+listen_on = "127.0.0.1:5222"
+cert = "./certs/xmpp.pem"
+key = "./certs/xmpp.key"
+hostname = "localhost"
+
+[storage]
+db_path = "db.0.sqlite"
+
+[cluster]
+addresses = [
+    "127.0.0.1:8080",
+    "127.0.0.1:8081",
+]
+
+[cluster.metadata]
+node_id = 0
+main_owner = 0
+rooms = { aaaaa = 1, test = 0 }
+
+[tracing]
+endpoint = "http://localhost:4317"
+service_name = "lavina-0"

config.1.toml

@@ -0,0 +1,30 @@
+[telemetry]
+listen_on = "127.0.0.1:8081"
+
+[irc]
+listen_on = "127.0.0.1:6668"
+server_name = "irc.localhost"
+
+[xmpp]
+listen_on = "127.0.0.1:5223"
+cert = "./certs/xmpp.pem"
+key = "./certs/xmpp.key"
+hostname = "localhost"
+
+[storage]
+db_path = "db.1.sqlite"
+
+[cluster]
+addresses = [
+    "127.0.0.1:8080",
+    "127.0.0.1:8081",
+]
+
+[cluster.metadata]
+node_id = 1
+main_owner = 0
+rooms = { aaaaa = 1, test = 0 }
+
+[tracing]
+endpoint = "http://localhost:4317"
+service_name = "lavina-1"

config.toml

@@ -9,6 +9,15 @@ server_name = "irc.localhost"
 listen_on = "127.0.0.1:5222"
 cert = "./certs/xmpp.pem"
 key = "./certs/xmpp.key"
+hostname = "localhost"
 
 [storage]
 db_path = "db.sqlite"
+
+[cluster]
+addresses = []
+
+[cluster.metadata]
+node_id = 0
+main_owner = 0
+rooms = {}

crates/lavina-core/Cargo.toml

@@ -5,8 +5,16 @@ version.workspace = true
 
 [dependencies]
 anyhow.workspace = true
-sqlx = { version = "0.7.0-alpha.2", features = ["sqlite", "migrate"] }
+sqlx = { version = "0.7.4", features = ["sqlite", "migrate", "chrono"] }
 serde.workspace = true
 tokio.workspace = true
 tracing.workspace = true
 prometheus.workspace = true
+chrono.workspace = true
+argon2 = { version = "0.5.3" }
+rand_core = { version = "0.6.4", features = ["getrandom"] }
+reqwest.workspace = true
+reqwest-middleware = { version = "0.3", features = ["json"] }
+opentelemetry.workspace = true
+mgmt-api = { path = "../mgmt-api" }
+reqwest-tracing = { version = "0.5", features = ["opentelemetry_0_22"] }

crates/lavina-core/migrations/2_created_at_for_messages.sql

@@ -0,0 +1 @@
+alter table messages add column created_at text;

crates/lavina-core/migrations/3_dialogs.sql

@@ -0,0 +1,17 @@
+create table dialogs(
+    id integer primary key autoincrement not null,
+    participant_1 integer not null,
+    participant_2 integer not null,
+    created_at timestamp not null,
+    message_count integer not null default 0,
+    unique (participant_1, participant_2)
+);
+
+create table dialog_messages(
+    dialog_id integer not null,
+    id integer not null,  -- unique per dialog, sequential in one dialog
+    author_id integer not null,
+    content string not null,
+    created_at timestamp not null,
+    primary key (dialog_id, id)
+);

crates/lavina-core/migrations/4_new_challenges.sql

@@ -0,0 +1,4 @@
+create table challenges_argon2_password(
+    user_id integer primary key not null,
+    hash string not null
+);

crates/lavina-core/migrations/5_message_datetime.sql

@@ -0,0 +1,2 @@
+alter table messages drop column created_at;
+alter table messages add column created_at datetime default "1970-01-01T00:00:00Z";

crates/lavina-core/src/auth.rs

@@ -0,0 +1,58 @@
+use anyhow::{anyhow, Result};
+use argon2::password_hash::{PasswordHash, PasswordHasher, PasswordVerifier, SaltString};
+use argon2::Argon2;
+use rand_core::OsRng;
+
+use crate::LavinaCore;
+
+pub enum Verdict {
+    Authenticated,
+    UserNotFound,
+    InvalidPassword,
+}
+
+pub enum UpdatePasswordResult {
+    PasswordUpdated,
+    UserNotFound,
+}
+
+impl LavinaCore {
+    #[tracing::instrument(skip(self, provided_password), name = "Services::authenticate")]
+    pub async fn authenticate(&self, login: &str, provided_password: &str) -> Result<Verdict> {
+        let Some(stored_user) = self.services.storage.retrieve_user_by_name(login).await? else {
+            return Ok(Verdict::UserNotFound);
+        };
+        if let Some(argon2_hash) = stored_user.argon2_hash {
+            let argon2 = Argon2::default();
+            let password_hash =
+                PasswordHash::new(&argon2_hash).map_err(|e| anyhow!("Failed to parse password hash: {e:?}"))?;
+            let password_verifier = argon2.verify_password(provided_password.as_bytes(), &password_hash);
+            if password_verifier.is_ok() {
+                return Ok(Verdict::Authenticated);
+            }
+        }
+        if let Some(expected_password) = stored_user.password {
+            if expected_password == provided_password {
+                return Ok(Verdict::Authenticated);
+            }
+        }
+        Ok(Verdict::InvalidPassword)
+    }
+
+    #[tracing::instrument(skip(self, provided_password), name = "Services::set_password")]
+    pub async fn set_password(&self, login: &str, provided_password: &str) -> Result<UpdatePasswordResult> {
+        let Some(u) = self.services.storage.retrieve_user_by_name(login).await? else {
+            return Ok(UpdatePasswordResult::UserNotFound);
+        };
+
+        let salt = SaltString::generate(&mut OsRng);
+        let argon2 = Argon2::default();
+        let password_hash = argon2
+            .hash_password(provided_password.as_bytes(), &salt)
+            .map_err(|e| anyhow!("Failed to hash password: {e:?}"))?;
+
+        self.services.storage.set_argon2_challenge(u.id, password_hash.to_string().as_str()).await?;
+        tracing::info!("Password changed for player {login}");
+        Ok(UpdatePasswordResult::PasswordUpdated)
+    }
+}

crates/lavina-core/src/clustering.rs

@@ -0,0 +1,56 @@
+use std::collections::HashMap;
+use std::net::SocketAddr;
+
+use anyhow::{anyhow, Result};
+use reqwest::Client;
+use reqwest_middleware::{ClientBuilder, ClientWithMiddleware};
+use reqwest_tracing::{DefaultSpanBackend, TracingMiddleware};
+use serde::{Deserialize, Serialize};
+
+pub mod broadcast;
+pub mod room;
+
+type Addresses = Vec<SocketAddr>;
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ClusterConfig {
+    pub metadata: ClusterMetadata,
+    pub addresses: Addresses,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct ClusterMetadata {
+    /// The node id of the current node.
+    pub node_id: u32,
+    /// Owns all rooms in the cluster except the ones specified in `rooms`.
+    pub main_owner: u32,
+    pub rooms: HashMap<String, u32>,
+}
+
+pub struct LavinaClient {
+    addresses: Addresses,
+    client: ClientWithMiddleware,
+}
+
+impl LavinaClient {
+    pub fn new(addresses: Addresses) -> Self {
+        let client = ClientBuilder::new(Client::new()).with(TracingMiddleware::<DefaultSpanBackend>::new()).build();
+        Self { addresses, client }
+    }
+
+    async fn send_request(&self, node_id: u32, path: &str, req: impl Serialize) -> Result<()> {
+        let Some(address) = self.addresses.get(node_id as usize) else {
+            return Err(anyhow!("Unknown node"));
+        };
+        match self.client.post(format!("http://{}{}", address, path)).json(&req).send().await {
+            Ok(res) => {
+                if res.status().is_server_error() || res.status().is_client_error() {
+                    tracing::error!("Cluster request failed: {:?}", res);
+                    return Err(anyhow!("Server error"));
+                }
+                Ok(())
+            }
+            Err(e) => Err(e.into()),
+        }
+    }
+}

crates/lavina-core/src/clustering/broadcast.rs

@@ -0,0 +1,53 @@
+use std::collections::{HashMap, HashSet};
+
+use chrono::{DateTime, Utc};
+use tokio::sync::Mutex;
+
+use crate::player::{PlayerId, Updates};
+use crate::prelude::Str;
+use crate::room::RoomId;
+use crate::Services;
+
+/// Receives updates from other nodes and broadcasts them to local player actors.
+struct BroadcastingInner {
+    subscriptions: HashMap<RoomId, HashSet<PlayerId>>,
+}
+
+pub struct Broadcasting(Mutex<BroadcastingInner>);
+impl Broadcasting {
+    pub fn new() -> Self {
+        let inner = BroadcastingInner {
+            subscriptions: HashMap::new(),
+        };
+        Self(Mutex::new(inner))
+    }
+}
+impl Services {
+    /// Broadcasts the given update to subscribed player actors on local node.
+    #[tracing::instrument(skip(self, message, created_at))]
+    pub async fn broadcast(&self, room_id: RoomId, author_id: PlayerId, message: Str, created_at: DateTime<Utc>) {
+        let inner = self.broadcasting.0.lock().await;
+        let Some(subscribers) = inner.subscriptions.get(&room_id) else {
+            return;
+        };
+        let update = Updates::NewMessage {
+            room_id: room_id.clone(),
+            author_id: author_id.clone(),
+            body: message.clone(),
+            created_at: created_at.clone(),
+        };
+        for i in subscribers {
+            if i == &author_id {
+                continue;
+            }
+            let Some(player) = self.players.get_player(i).await else {
+                continue;
+            };
+            player.update(update.clone()).await;
+        }
+    }
+
+    pub async fn subscribe(&self, subscriber: PlayerId, room_id: RoomId) {
+        self.broadcasting.0.lock().await.subscriptions.entry(room_id).or_insert_with(HashSet::new).insert(subscriber);
+    }
+}

crates/lavina-core/src/clustering/room.rs

@@ -0,0 +1,88 @@
+use anyhow::Result;
+use serde::{Deserialize, Serialize};
+
+use crate::clustering::LavinaClient;
+use crate::player::PlayerId;
+use crate::prelude::Str;
+use crate::room::RoomId;
+use crate::LavinaCore;
+
+pub mod paths {
+    pub const JOIN: &'static str = "/cluster/rooms/join";
+    pub const LEAVE: &'static str = "/cluster/rooms/leave";
+    pub const ADD_MESSAGE: &'static str = "/cluster/rooms/add_message";
+    pub const SET_TOPIC: &'static str = "/cluster/rooms/set_topic";
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct JoinRoomReq<'a> {
+    pub room_id: &'a str,
+    pub player_id: &'a str,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct LeaveRoomReq<'a> {
+    pub room_id: &'a str,
+    pub player_id: &'a str,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct SendMessageReq<'a> {
+    pub room_id: &'a str,
+    pub player_id: &'a str,
+    pub message: &'a str,
+    pub created_at: &'a str,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct SetRoomTopicReq<'a> {
+    pub room_id: &'a str,
+    pub player_id: &'a str,
+    pub topic: &'a str,
+}
+
+impl LavinaClient {
+    #[tracing::instrument(skip(self, req), name = "LavinaClient::join_room")]
+    pub async fn join_room(&self, node_id: u32, req: JoinRoomReq<'_>) -> Result<()> {
+        self.send_request(node_id, paths::JOIN, req).await
+    }
+
+    #[tracing::instrument(skip(self, req), name = "LavinaClient::leave_room")]
+    pub async fn leave_room(&self, node_id: u32, req: LeaveRoomReq<'_>) -> Result<()> {
+        self.send_request(node_id, paths::LEAVE, req).await
+    }
+
+    #[tracing::instrument(skip(self, req), name = "LavinaClient::send_room_message")]
+    pub async fn send_room_message(&self, node_id: u32, req: SendMessageReq<'_>) -> Result<()> {
+        self.send_request(node_id, paths::ADD_MESSAGE, req).await
+    }
+
+    #[tracing::instrument(skip(self, req), name = "LavinaClient::set_room_topic")]
+    pub async fn set_room_topic(&self, node_id: u32, req: SetRoomTopicReq<'_>) -> Result<()> {
+        self.send_request(node_id, paths::SET_TOPIC, req).await
+    }
+}
+
+impl LavinaCore {
+    pub async fn cluster_join_room(&self, room_id: RoomId, player_id: &PlayerId) -> Result<()> {
+        let room_handle = self.services.rooms.get_or_create_room(&self.services, room_id).await?;
+        let storage_id =
+            self.services.storage.create_or_retrieve_user_id_by_name(player_id.as_inner().as_ref()).await?;
+        room_handle.add_member(&self.services, &player_id, storage_id).await;
+        Ok(())
+    }
+
+    pub async fn cluster_send_room_message(
+        &self,
+        room_id: RoomId,
+        player_id: &PlayerId,
+        message: Str,
+        created_at: chrono::DateTime<chrono::Utc>,
+    ) -> Result<Option<()>> {
+        let Some(room_handle) = self.services.rooms.get_room(&self.services, &room_id).await? else {
+            return Ok(None);
+        };
+        room_handle.send_message(&self.services, &player_id, message, created_at).await?;
+        Ok(Some(()))
+    }
+}

crates/lavina-core/src/dialog.rs

@@ -0,0 +1,151 @@
+//! Domain of dialogs – conversations between two participants.
+//!
+//! Dialogs are different from rooms in that they are always between two participants.
+//! There are no admins or other roles in dialogs, both participants have equal rights.
+
+use std::collections::HashMap;
+
+use chrono::{DateTime, Utc};
+use tokio::sync::RwLock as AsyncRwLock;
+
+use crate::player::{PlayerId, Updates};
+use crate::prelude::*;
+use crate::Services;
+
+/// Id of a conversation between two players.
+///
+/// Dialogs are identified by the pair of participants' ids. The order of ids does not matter.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct DialogId(PlayerId, PlayerId);
+impl DialogId {
+    pub fn new(a: PlayerId, b: PlayerId) -> DialogId {
+        if a.as_inner() < b.as_inner() {
+            DialogId(a, b)
+        } else {
+            DialogId(b, a)
+        }
+    }
+
+    pub fn as_inner(&self) -> (&PlayerId, &PlayerId) {
+        (&self.0, &self.1)
+    }
+
+    pub fn into_inner(self) -> (PlayerId, PlayerId) {
+        (self.0, self.1)
+    }
+}
+
+struct Dialog {
+    storage_id: u32,
+    player_storage_id_1: u32,
+    player_storage_id_2: u32,
+    message_count: u32,
+}
+
+struct DialogRegistryInner {
+    dialogs: HashMap<DialogId, AsyncRwLock<Dialog>>,
+}
+
+pub(crate) struct DialogRegistry(AsyncRwLock<DialogRegistryInner>);
+
+impl Services {
+    #[tracing::instrument(skip(self, body, created_at))]
+    pub async fn send_dialog_message(
+        &self,
+        from: PlayerId,
+        to: PlayerId,
+        body: Str,
+        created_at: &DateTime<Utc>,
+    ) -> Result<()> {
+        let guard = self.dialogs.0.read().await;
+        let id = DialogId::new(from.clone(), to.clone());
+        let dialog = guard.dialogs.get(&id);
+        if let Some(d) = dialog {
+            let mut d = d.write().await;
+            self.storage
+                .insert_dialog_message(d.storage_id, d.message_count, from.as_inner(), &body, created_at)
+                .await?;
+            d.message_count += 1;
+        } else {
+            drop(guard);
+            let mut guard2 = self.dialogs.0.write().await;
+            // double check in case concurrent access has loaded this dialog
+            if let Some(d) = guard2.dialogs.get(&id) {
+                let mut d = d.write().await;
+                self.storage
+                    .insert_dialog_message(d.storage_id, d.message_count, from.as_inner(), &body, created_at)
+                    .await?;
+                d.message_count += 1;
+            } else {
+                let (p1, p2) = id.as_inner();
+                tracing::info!("Dialog {id:?} not found locally, trying to load from storage");
+                let stored_dialog = match self.storage.retrieve_dialog(p1.as_inner(), p2.as_inner()).await? {
+                    Some(t) => t,
+                    None => {
+                        tracing::info!("Dialog {id:?} does not exist, creating a new one in storage");
+                        self.storage.initialize_dialog(p1.as_inner(), p2.as_inner(), created_at).await?
+                    }
+                };
+                tracing::info!("Dialog {id:?} loaded");
+                self.storage
+                    .insert_dialog_message(
+                        stored_dialog.id,
+                        stored_dialog.message_count,
+                        from.as_inner(),
+                        &body,
+                        created_at,
+                    )
+                    .await?;
+                let dialog = Dialog {
+                    storage_id: stored_dialog.id,
+                    player_storage_id_1: stored_dialog.participant_1,
+                    player_storage_id_2: stored_dialog.participant_2,
+                    message_count: stored_dialog.message_count + 1,
+                };
+                guard2.dialogs.insert(id.clone(), AsyncRwLock::new(dialog));
+            }
+            drop(guard2);
+        }
+        // TODO send message to the other player and persist it
+        let Some(player) = self.players.get_player(&to).await else {
+            tracing::debug!("Player {to:?} not active, not sending message");
+            return Ok(());
+        };
+        let update = Updates::NewDialogMessage {
+            sender: from.clone(),
+            receiver: to.clone(),
+            body: body.clone(),
+            created_at: created_at.clone(),
+        };
+        player.update(update).await;
+        return Ok(());
+    }
+}
+
+impl DialogRegistry {
+    pub fn new() -> DialogRegistry {
+        DialogRegistry(AsyncRwLock::new(DialogRegistryInner {
+            dialogs: HashMap::new(),
+        }))
+    }
+
+    pub fn shutdown(self) {}
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_dialog_id_new() -> Result<()> {
+        let a = PlayerId::from("a")?;
+        let b = PlayerId::from("b")?;
+        let id1 = DialogId::new(a.clone(), b.clone());
+        let id2 = DialogId::new(a.clone(), b.clone());
+        // Dialog ids are invariant with respect to the order of participants
+        assert_eq!(id1, id2);
+        assert_eq!(id1.as_inner(), (&a, &b));
+        assert_eq!(id2.as_inner(), (&a, &b));
+        Ok(())
+    }
+}

crates/lavina-core/src/lib.rs

@@ -1,4 +1,20 @@
 //! Domain definitions and implementation of common chat logic.
+use std::ops::Deref;
+use std::sync::Arc;
+
+use anyhow::Result;
+use prometheus::Registry as MetricsRegistry;
+
+use crate::clustering::broadcast::Broadcasting;
+use crate::clustering::{ClusterConfig, ClusterMetadata, LavinaClient};
+use crate::dialog::DialogRegistry;
+use crate::player::{PlayerConnectionResult, PlayerId, PlayerRegistry};
+use crate::repo::Storage;
+use crate::room::{RoomHandle, RoomId, RoomInfo, RoomRegistry};
+
+pub mod auth;
+pub mod clustering;
+pub mod dialog;
 pub mod player;
 pub mod prelude;
 pub mod repo;
@@ -6,3 +22,91 @@ pub mod room;
 pub mod terminator;
 
 mod table;
+
+#[derive(Clone)]
+pub struct LavinaCore {
+    services: Arc<Services>,
+}
+
+impl Deref for LavinaCore {
+    type Target = Services;
+
+    fn deref(&self) -> &Self::Target {
+        &self.services
+    }
+}
+
+impl LavinaCore {
+    pub async fn connect_to_player(&self, player_id: &PlayerId) -> Result<PlayerConnectionResult> {
+        self.services.players.connect_to_player(&self, player_id).await
+    }
+
+    pub async fn get_room(&self, room_id: &RoomId) -> Result<Option<RoomHandle>> {
+        self.services.rooms.get_room(&self.services, room_id).await
+    }
+
+    pub async fn create_player(&self, player_id: &PlayerId) -> Result<()> {
+        self.services.storage.create_user(player_id.as_inner()).await
+    }
+
+    pub async fn get_all_rooms(&self) -> Vec<RoomInfo> {
+        self.services.rooms.get_all_rooms().await
+    }
+
+    pub async fn stop_player(&self, player_id: &PlayerId) -> Result<Option<()>> {
+        self.services.players.stop_player(player_id).await
+    }
+}
+
+pub struct Services {
+    pub(crate) players: PlayerRegistry,
+    pub(crate) rooms: RoomRegistry,
+    pub(crate) dialogs: DialogRegistry,
+    pub(crate) broadcasting: Broadcasting,
+    pub(crate) client: LavinaClient,
+    pub(crate) storage: Storage,
+    pub(crate) cluster_metadata: ClusterMetadata,
+}
+
+impl LavinaCore {
+    pub async fn new(
+        metrics: &mut MetricsRegistry,
+        cluster_config: ClusterConfig,
+        storage: Storage,
+    ) -> Result<LavinaCore> {
+        // TODO shutdown all services in reverse order on error
+        let broadcasting = Broadcasting::new();
+        let client = LavinaClient::new(cluster_config.addresses.clone());
+        let rooms = RoomRegistry::new(metrics)?;
+        let dialogs = DialogRegistry::new();
+        let players = PlayerRegistry::empty(metrics)?;
+
+        let services = Services {
+            players,
+            rooms,
+            dialogs,
+            broadcasting,
+            client,
+            storage,
+            cluster_metadata: cluster_config.metadata,
+        };
+
+        Ok(LavinaCore {
+            services: Arc::new(services),
+        })
+    }
+
+    pub async fn shutdown(self) -> Storage {
+        self.players.shutdown_all().await;
+        let services = match Arc::try_unwrap(self.services) {
+            Ok(e) => e,
+            Err(_) => {
+                panic!("failed to acquire services ownership on shutdown");
+            }
+        };
+        let _ = services.players.shutdown();
+        let _ = services.dialogs.shutdown();
+        let _ = services.rooms.shutdown();
+        services.storage
+    }
+}

crates/lavina-core/src/player.rs

@@ -7,21 +7,21 @@
 //!
 //! A player actor is a serial handler of commands from a single player. It is preferable to run all per-player validations in the player actor,
 //! so that they don't overload the room actor.
-use std::{
+use std::collections::{HashMap, HashSet};
-    collections::{HashMap, HashSet},
-    sync::{Arc, RwLock},
-};
 
+use anyhow::anyhow;
+use chrono::{DateTime, Utc};
 use prometheus::{IntGauge, Registry as MetricsRegistry};
 use serde::Serialize;
-use tokio::{
+use tokio::sync::mpsc::{channel, Receiver, Sender};
-    sync::mpsc::{channel, Receiver, Sender},
+use tokio::sync::RwLock;
-    task::JoinHandle,
+use tracing::{Instrument, Span};
-};
 
+use crate::clustering::room::*;
 use crate::prelude::*;
-use crate::room::{RoomHandle, RoomId, RoomInfo, RoomRegistry};
+use crate::room::{RoomHandle, RoomId, RoomInfo, StoredMessage};
 use crate::table::{AnonTable, Key as AnonKey};
+use crate::LavinaCore;
 
 /// Opaque player identifier. Cannot contain spaces, must be shorter than 32.
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize)]
@@ -45,145 +45,219 @@ impl PlayerId {
     }
 }
 
+/// Node-local identifier of a connection. It is used to address a connection within a player actor.
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct ConnectionId(pub AnonKey);
 
+/// Representation of an authenticated client connection.
+/// The public API available to projections through which all client actions are executed.
+///
+/// The connection is used to send commands to the player actor and to receive updates that might be sent to the client.
 pub struct PlayerConnection {
     pub connection_id: ConnectionId,
-    pub receiver: Receiver<Updates>,
+    pub receiver: Receiver<ConnectionMessage>,
     player_handle: PlayerHandle,
 }
 impl PlayerConnection {
-    pub async fn send_message(&mut self, room_id: RoomId, body: Str) -> Result<()> {
+    /// Handled in [Player::send_room_message].
-        self.player_handle
+    #[tracing::instrument(skip(self, body), name = "PlayerConnection::send_message")]
-            .send_message(room_id, self.connection_id.clone(), body)
+    pub async fn send_message(&mut self, room_id: RoomId, body: Str) -> Result<SendMessageResult> {
-            .await
-    }
-
-    pub async fn join_room(&mut self, room_id: RoomId) -> Result<JoinResult> {
-        self.player_handle.join_room(room_id, self.connection_id.clone()).await
-    }
-
-    pub async fn change_topic(&mut self, room_id: RoomId, new_topic: Str) -> Result<()> {
         let (promise, deferred) = oneshot();
-        let cmd = Cmd::ChangeTopic {
+        let cmd = ClientCommand::SendMessage { room_id, body, promise };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
+    }
+
+    /// Handled in [Player::join_room].
+    #[tracing::instrument(skip(self), name = "PlayerConnection::join_room")]
+    pub async fn join_room(&mut self, room_id: RoomId) -> Result<JoinResult> {
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::JoinRoom { room_id, promise };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
+    }
+
+    /// Handled in [Player::change_room_topic].
+    #[tracing::instrument(skip(self, new_topic), name = "PlayerConnection::change_topic")]
+    pub async fn change_topic(&mut self, room_id: RoomId, new_topic: Str) -> Result<ChangeRoomTopicResult> {
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::ChangeRoomTopic {
             room_id,
             new_topic,
             promise,
         };
-        self.player_handle
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
-            .send(PlayerCommand::Cmd(cmd, self.connection_id.clone()))
+        deferred.await?
-            .await;
-        Ok(deferred.await?)
     }
 
+    /// Handled in [Player::leave_room].
+    #[tracing::instrument(skip(self), name = "PlayerConnection::leave_room")]
     pub async fn leave_room(&mut self, room_id: RoomId) -> Result<()> {
         let (promise, deferred) = oneshot();
-        self.player_handle
+        let cmd = ClientCommand::LeaveRoom { room_id, promise };
-            .send(PlayerCommand::Cmd(
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
-                Cmd::LeaveRoom { room_id, promise },
+        deferred.await?
-                self.connection_id.clone(),
-            ))
-            .await;
-        Ok(deferred.await?)
     }
 
-    pub async fn terminate(self) {
+    pub async fn terminate(self) -> Result<()> {
-        self.player_handle
+        self.player_handle.send(ActorCommand::TerminateConnection(self.connection_id)).await
-            .send(PlayerCommand::TerminateConnection(self.connection_id))
-            .await;
     }
 
+    /// Handled in [Player::get_rooms].
+    #[tracing::instrument(skip(self), name = "PlayerConnection::get_rooms")]
     pub async fn get_rooms(&self) -> Result<Vec<RoomInfo>> {
         let (promise, deferred) = oneshot();
-        self.player_handle.send(PlayerCommand::GetRooms(promise)).await;
+        let cmd = ClientCommand::GetRooms { promise };
-        Ok(deferred.await?)
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
+    }
+
+    #[tracing::instrument(skip(self), name = "PlayerConnection::get_room_message_history")]
+    pub async fn get_room_message_history(&self, room_id: &RoomId, limit: u32) -> Result<RoomHistoryResult> {
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::GetRoomHistory {
+            room_id: room_id.clone(),
+            promise,
+            limit,
+        };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
+    }
+
+    /// Handler in [Player::send_dialog_message].
+    #[tracing::instrument(skip(self, body), name = "PlayerConnection::send_dialog_message")]
+    pub async fn send_dialog_message(&self, recipient: PlayerId, body: Str) -> Result<()> {
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::SendDialogMessage {
+            recipient,
+            body,
+            promise,
+        };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
+    }
+
+    /// Handler in [Player::check_user_existence].
+    #[tracing::instrument(skip(self), name = "PlayerConnection::check_user_existence")]
+    pub async fn check_user_existence(&self, recipient: PlayerId) -> Result<GetInfoResult> {
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::GetInfo { recipient, promise };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await?;
+        deferred.await?
     }
 }
 
 /// Handle to a player actor.
 #[derive(Clone)]
 pub struct PlayerHandle {
-    tx: Sender<PlayerCommand>,
+    tx: Sender<(ActorCommand, Span)>,
 }
 impl PlayerHandle {
-    pub async fn subscribe(&self) -> PlayerConnection {
+    pub async fn subscribe(&self) -> Result<PlayerConnection> {
         let (sender, receiver) = channel(32);
         let (promise, deferred) = oneshot();
-        let cmd = PlayerCommand::AddConnection { sender, promise };
+        let cmd = ActorCommand::AddConnection { sender, promise };
-        let _ = self.tx.send(cmd).await;
+        self.send(cmd).await?;
-        let connection_id = deferred.await.unwrap();
+        let connection_id = deferred.await?;
-        PlayerConnection {
+        Ok(PlayerConnection {
             connection_id,
             player_handle: self.clone(),
             receiver,
-        }
+        })
     }
 
-    pub async fn send_message(&self, room_id: RoomId, connection_id: ConnectionId, body: Str) -> Result<()> {
+    async fn send(&self, command: ActorCommand) -> Result<()> {
-        let (promise, deferred) = oneshot();
+        let span = tracing::span!(tracing::Level::INFO, "PlayerHandle::send");
-        let cmd = Cmd::SendMessage { room_id, body, promise };
+        self.tx.send((command, span)).await?;
-        let _ = self.tx.send(PlayerCommand::Cmd(cmd, connection_id)).await;
+        Ok(())
-        Ok(deferred.await?)
-    }
-
-    pub async fn join_room(&self, room_id: RoomId, connection_id: ConnectionId) -> Result<JoinResult> {
-        let (promise, deferred) = oneshot();
-        let cmd = Cmd::JoinRoom { room_id, promise };
-        let _ = self.tx.send(PlayerCommand::Cmd(cmd, connection_id)).await;
-        Ok(deferred.await?)
-    }
-
-    async fn send(&self, command: PlayerCommand) {
-        let _ = self.tx.send(command).await;
     }
 
     pub async fn update(&self, update: Updates) {
-        self.send(PlayerCommand::Update(update)).await;
+        let _ = self.send(ActorCommand::Update(update)).await;
     }
 }
 
-enum PlayerCommand {
+/// Messages sent to the player actor.
-    /** Commands from connections */
+enum ActorCommand {
+    /// Establish a new connection.
     AddConnection {
-        sender: Sender<Updates>,
+        sender: Sender<ConnectionMessage>,
         promise: Promise<ConnectionId>,
     },
+    /// Terminate an existing connection.
     TerminateConnection(ConnectionId),
-    Cmd(Cmd, ConnectionId),
+    /// Player-issued command.
-    /// Query - responds with a list of rooms the player is a member of.
+    ClientCommand(ClientCommand, ConnectionId),
-    GetRooms(Promise<Vec<RoomInfo>>),
+    /// Update which is sent from a room the player is member of.
-    /** Events from rooms */
     Update(Updates),
     Stop,
 }
 
-pub enum Cmd {
+/// Client-issued command sent to the player actor. The actor will respond with by fulfilling the promise.
+pub enum ClientCommand {
     JoinRoom {
         room_id: RoomId,
-        promise: Promise<JoinResult>,
+        promise: Promise<Result<JoinResult>>,
     },
     LeaveRoom {
         room_id: RoomId,
-        promise: Promise<()>,
+        promise: Promise<Result<()>>,
     },
     SendMessage {
         room_id: RoomId,
         body: Str,
-        promise: Promise<()>,
+        promise: Promise<Result<SendMessageResult>>,
     },
-    ChangeTopic {
+    ChangeRoomTopic {
         room_id: RoomId,
         new_topic: Str,
-        promise: Promise<()>,
+        promise: Promise<Result<ChangeRoomTopicResult>>,
     },
+    GetRooms {
+        promise: Promise<Result<Vec<RoomInfo>>>,
+    },
+    SendDialogMessage {
+        recipient: PlayerId,
+        body: Str,
+        promise: Promise<Result<()>>,
+    },
+    GetInfo {
+        recipient: PlayerId,
+        promise: Promise<Result<GetInfoResult>>,
+    },
+    GetRoomHistory {
+        room_id: RoomId,
+        limit: u32,
+        promise: Promise<Result<RoomHistoryResult>>,
+    },
+}
+
+pub enum GetInfoResult {
+    UserExists,
+    UserDoesntExist,
 }
 
 pub enum JoinResult {
     Success(RoomInfo),
+    AlreadyJoined,
     Banned,
 }
 
+pub enum ChangeRoomTopicResult {
+    Success,
+    NoSuchRoom,
+}
+
+pub enum SendMessageResult {
+    Success(DateTime<Utc>),
+    NoSuchRoom,
+}
+
+pub enum RoomHistoryResult {
+    Success(Vec<StoredMessage>),
+    NoSuchRoom,
+}
+
 /// Player update event type which is sent to a player actor and from there to a connection handler.
 #[derive(Clone, Debug)]
 pub enum Updates {
@@ -195,6 +269,7 @@ pub enum Updates {
         room_id: RoomId,
         author_id: PlayerId,
         body: Str,
+        created_at: DateTime<Utc>,
     },
     RoomJoined {
         room_id: RoomId,
@@ -206,215 +281,521 @@ pub enum Updates {
     },
     /// The player was banned from the room and left it immediately.
     BannedFrom(RoomId),
+    NewDialogMessage {
+        sender: PlayerId,
+        receiver: PlayerId,
+        body: Str,
+        created_at: DateTime<Utc>,
+    },
 }
 
 /// Handle to a player registry — a shared data structure containing information about players.
-#[derive(Clone)]
+pub(crate) struct PlayerRegistry(RwLock<PlayerRegistryInner>);
-pub struct PlayerRegistry(Arc<RwLock<PlayerRegistryInner>>);
 impl PlayerRegistry {
-    pub fn empty(room_registry: RoomRegistry, metrics: &mut MetricsRegistry) -> Result<PlayerRegistry> {
+    pub fn empty(metrics: &mut MetricsRegistry) -> Result<PlayerRegistry> {
         let metric_active_players = IntGauge::new("chat_players_active", "Number of alive player actors")?;
         metrics.register(Box::new(metric_active_players.clone()))?;
         let inner = PlayerRegistryInner {
-            room_registry,
             players: HashMap::new(),
             metric_active_players,
         };
-        Ok(PlayerRegistry(Arc::new(RwLock::new(inner))))
+        Ok(PlayerRegistry(RwLock::new(inner)))
     }
 
-    pub async fn get_or_create_player(&mut self, id: PlayerId) -> PlayerHandle {
+    pub fn shutdown(self) {
-        let mut inner = self.0.write().unwrap();
+        let res = self.0.into_inner();
-        if let Some((handle, _)) = inner.players.get(&id) {
+        drop(res);
-            handle.clone()
+    }
+
+    #[tracing::instrument(skip(self), name = "PlayerRegistry::get_player")]
+    pub async fn get_player(&self, id: &PlayerId) -> Option<PlayerHandle> {
+        let inner = self.0.read().await;
+        inner.players.get(id).map(|(handle, _)| handle.clone())
+    }
+
+    #[tracing::instrument(skip(self), name = "PlayerRegistry::stop_player")]
+    pub async fn stop_player(&self, id: &PlayerId) -> Result<Option<()>> {
+        let mut inner = self.0.write().await;
+        if let Some((handle, fiber)) = inner.players.remove(id) {
+            if let Err(_) = handle.send(ActorCommand::Stop).await {
+                log::warn!("Failed to send Stop to the player actor #{id:?}. Ignoring, it is probably stopped already");
+            }
+            drop(handle);
+            fiber.await?;
+            inner.metric_active_players.dec();
+            Ok(Some(()))
         } else {
-            let (handle, fiber) = Player::launch(id.clone(), inner.room_registry.clone());
+            Ok(None)
-            inner.players.insert(id, (handle.clone(), fiber));
-            inner.metric_active_players.inc();
-            handle
         }
     }
 
-    pub async fn connect_to_player(&mut self, id: PlayerId) -> PlayerConnection {
+    #[tracing::instrument(skip(self, core), name = "PlayerRegistry::get_or_launch_player")]
-        let player_handle = self.get_or_create_player(id).await;
+    async fn get_or_launch_player(&self, core: &LavinaCore, id: &PlayerId) -> Result<Option<PlayerHandle>> {
-        player_handle.subscribe().await
+        let inner = self.0.read().await;
+        if let Some((handle, _)) = inner.players.get(id) {
+            Ok(Some(handle.clone()))
+        } else {
+            drop(inner);
+            let mut inner = self.0.write().await;
+            if let Some((handle, _)) = inner.players.get(id) {
+                Ok(Some(handle.clone()))
+            } else {
+                let Some((handle, fiber)) = Player::launch(id.clone(), core.clone()).await? else {
+                    return Ok(None);
+                };
+                inner.players.insert(id.clone(), (handle.clone(), fiber));
+                inner.metric_active_players.inc();
+                Ok(Some(handle))
+            }
+        }
     }
 
-    pub async fn shutdown_all(&mut self) -> Result<()> {
+    #[tracing::instrument(skip(self, core), name = "PlayerRegistry::connect_to_player")]
-        let mut inner = self.0.write().unwrap();
+    pub async fn connect_to_player(&self, core: &LavinaCore, id: &PlayerId) -> Result<PlayerConnectionResult> {
-        for (i, (k, j)) in inner.players.drain() {
+        let Some(player_handle) = self.get_or_launch_player(core, id).await? else {
-            k.send(PlayerCommand::Stop).await;
+            return Ok(PlayerConnectionResult::PlayerNotFound);
-            drop(k);
+        };
-            j.await?;
+        let new_conn = player_handle.subscribe().await?;
-            log::debug!("Player stopped #{i:?}")
+        Ok(PlayerConnectionResult::Success(new_conn))
+    }
+
+    pub async fn shutdown_all(&self) {
+        let mut inner = self.0.write().await;
+        for (id, (handle, task)) in inner.players.drain() {
+            let _ = handle.send(ActorCommand::Stop).await;
+            drop(handle);
+            match task.await {
+                Ok(_) => log::debug!("Player stopped #{id:?}"),
+                Err(e) => log::error!("Player #{id:?} failed to stop: {e}"),
+            }
         }
         log::debug!("All players stopped");
-        Ok(())
     }
 }
 
 /// The player registry state representation.
 struct PlayerRegistryInner {
-    room_registry: RoomRegistry,
+    /// Active player actors.
     players: HashMap<PlayerId, (PlayerHandle, JoinHandle<Player>)>,
     metric_active_players: IntGauge,
 }
 
+enum RoomRef {
+    Local(RoomHandle),
+    Remote { node_id: u32 },
+}
+
 /// Player actor inner state representation.
 struct Player {
     player_id: PlayerId,
-    connections: AnonTable<Sender<Updates>>,
+    storage_id: u32,
-    my_rooms: HashMap<RoomId, RoomHandle>,
+    connections: AnonTable<Sender<ConnectionMessage>>,
+    my_rooms: HashMap<RoomId, RoomRef>,
     banned_from: HashSet<RoomId>,
-    rx: Receiver<PlayerCommand>,
+    rx: Receiver<(ActorCommand, Span)>,
     handle: PlayerHandle,
-    rooms: RoomRegistry,
+    services: LavinaCore,
 }
 impl Player {
-    fn launch(player_id: PlayerId, rooms: RoomRegistry) -> (PlayerHandle, JoinHandle<Player>) {
+    async fn launch(player_id: PlayerId, core: LavinaCore) -> Result<Option<(PlayerHandle, JoinHandle<Player>)>> {
         let (tx, rx) = channel(32);
         let handle = PlayerHandle { tx };
         let handle_clone = handle.clone();
+        let Some(storage_id) = core.services.storage.retrieve_user_id_by_name(player_id.as_inner()).await? else {
+            return Ok(None);
+        };
         let player = Player {
             player_id,
+            storage_id,
+            // connections are empty when the actor is just started
             connections: AnonTable::new(),
+            // room handlers will be loaded later in the started task
             my_rooms: HashMap::new(),
-            banned_from: HashSet::from([RoomId::from("Empty").unwrap()]),
+            // TODO implement and load bans
+            banned_from: HashSet::new(),
             rx,
             handle,
-            rooms,
+            services: core,
         };
         let fiber = tokio::task::spawn(player.main_loop());
-        (handle_clone, fiber)
+        Ok(Some((handle_clone, fiber)))
+    }
+
+    fn room_location(&self, room_id: &RoomId) -> Option<u32> {
+        let res = self.services.cluster_metadata.rooms.get(room_id.as_inner().as_ref()).copied();
+        let node = res.unwrap_or(self.services.cluster_metadata.main_owner);
+        if node == self.services.cluster_metadata.node_id {
+            None
+        } else {
+            Some(node)
+        }
     }
 
     async fn main_loop(mut self) -> Self {
+        let rooms = self.services.storage.get_rooms_of_a_user(self.storage_id).await.unwrap();
+        for room_id in rooms {
+            if let Some(remote_node) = self.room_location(&room_id) {
+                self.my_rooms.insert(room_id.clone(), RoomRef::Remote { node_id: remote_node });
+                self.services.subscribe(self.player_id.clone(), room_id).await;
+            } else {
+                let room = self.services.rooms.get_room(&self.services, &room_id).await.unwrap();
+                if let Some(room) = room {
+                    room.subscribe(&self.player_id, self.handle.clone()).await;
+                    self.my_rooms.insert(room_id, RoomRef::Local(room));
+                } else {
+                    tracing::error!("Room #{room_id:?} not found");
+                }
+            }
+        }
         while let Some(cmd) = self.rx.recv().await {
-            match cmd {
+            let (cmd, span) = cmd;
-                PlayerCommand::AddConnection { sender, promise } => {
+            let should_stop = async {
-                    let connection_id = self.connections.insert(sender);
+                match cmd {
-                    if let Err(connection_id) = promise.send(ConnectionId(connection_id)) {
+                    ActorCommand::AddConnection { sender, promise } => {
-                        log::warn!("Connection {connection_id:?} terminated before finalization");
+                        let connection_id = self.connections.insert(sender);
-                        self.terminate_connection(connection_id);
+                        if let Err(connection_id) = promise.send(ConnectionId(connection_id)) {
-                    }
+                            log::warn!("Connection {connection_id:?} terminated before finalization");
-                }
+                            self.terminate_connection(connection_id);
-                PlayerCommand::TerminateConnection(connection_id) => {
-                    self.terminate_connection(connection_id);
-                }
-                PlayerCommand::GetRooms(promise) => {
-                    let mut response = vec![];
-                    for (_, handle) in &self.my_rooms {
-                        response.push(handle.get_room_info().await);
-                    }
-                    let _ = promise.send(response);
-                }
-                PlayerCommand::Update(update) => {
-                    log::info!(
-                        "Player received an update, broadcasting to {} connections",
-                        self.connections.len()
-                    );
-                    match update {
-                        Updates::BannedFrom(ref room_id) => {
-                            self.banned_from.insert(room_id.clone());
-                            self.my_rooms.remove(room_id);
                         }
-                        _ => {}
+                        false
                     }
-                    for (_, connection) in &self.connections {
+                    ActorCommand::TerminateConnection(connection_id) => {
-                        let _ = connection.send(update.clone()).await;
+                        self.terminate_connection(connection_id);
+                        false
                     }
+                    ActorCommand::Update(update) => {
+                        self.handle_update(update).await;
+                        false
+                    }
+                    ActorCommand::ClientCommand(cmd, connection_id) => {
+                        self.handle_cmd(cmd, connection_id).await;
+                        false
+                    }
+                    ActorCommand::Stop => true,
                 }
-                PlayerCommand::Cmd(cmd, connection_id) => self.handle_cmd(cmd, connection_id).await,
+            }
-                PlayerCommand::Stop => break,
+            .instrument(span)
+            .await;
+            if should_stop {
+                break;
             }
         }
         log::debug!("Shutting down player actor #{:?}", self.player_id);
         self
     }
 
+    /// Handle an incoming update by changing the internal state and broadcasting it to all connections if necessary.
+    #[tracing::instrument(skip(self, update), name = "Player::handle_update")]
+    async fn handle_update(&mut self, update: Updates) {
+        log::debug!(
+            "Player received an update, broadcasting to {} connections",
+            self.connections.len()
+        );
+        match update {
+            Updates::BannedFrom(ref room_id) => {
+                self.banned_from.insert(room_id.clone());
+                self.my_rooms.remove(room_id);
+            }
+            _ => {}
+        }
+        for (_, connection) in &self.connections {
+            let _ = connection.send(ConnectionMessage::Update(update.clone())).await;
+        }
+    }
+
     fn terminate_connection(&mut self, connection_id: ConnectionId) {
         if let None = self.connections.pop(connection_id.0) {
             log::warn!("Connection {connection_id:?} already terminated");
         }
     }
 
-    async fn handle_cmd(&mut self, cmd: Cmd, connection_id: ConnectionId) {
+    /// Dispatches a client command to the appropriate handler.
+    async fn handle_cmd(&mut self, cmd: ClientCommand, connection_id: ConnectionId) {
         match cmd {
-            Cmd::JoinRoom { room_id, promise } => {
+            ClientCommand::JoinRoom { room_id, promise } => {
-                if self.banned_from.contains(&room_id) {
+                let result = self.join_room(connection_id, room_id).await;
-                    let _ = promise.send(JoinResult::Banned);
+                let _ = promise.send(result);
-                    return;
-                }
-
-                let room = match self.rooms.get_or_create_room(room_id.clone()).await {
-                    Ok(room) => room,
-                    Err(e) => {
-                        log::error!("Failed to get or create room: {e}");
-                        return;
-                    }
-                };
-                room.subscribe(self.player_id.clone(), self.handle.clone()).await;
-                self.my_rooms.insert(room_id.clone(), room.clone());
-                let room_info = room.get_room_info().await;
-                let _ = promise.send(JoinResult::Success(room_info));
-                let update = Updates::RoomJoined {
-                    room_id,
-                    new_member_id: self.player_id.clone(),
-                };
-                self.broadcast_update(update, connection_id).await;
             }
-            Cmd::LeaveRoom { room_id, promise } => {
+            ClientCommand::LeaveRoom { room_id, promise } => {
-                let room = self.my_rooms.remove(&room_id);
+                let result = self.leave_room(connection_id, room_id).await;
-                if let Some(room) = room {
+                let _ = promise.send(result);
-                    room.unsubscribe(&self.player_id).await;
-                    let room_info = room.get_room_info().await;
-                }
-                let _ = promise.send(());
-                let update = Updates::RoomLeft {
-                    room_id,
-                    former_member_id: self.player_id.clone(),
-                };
-                self.broadcast_update(update, connection_id).await;
             }
-            Cmd::SendMessage { room_id, body, promise } => {
+            ClientCommand::SendMessage { room_id, body, promise } => {
-                let room = self.rooms.get_room(&room_id).await;
+                let result = self.send_room_message(connection_id, room_id, body).await;
-                if let Some(room) = room {
+                let _ = promise.send(result);
-                    room.send_message(self.player_id.clone(), body.clone()).await;
-                } else {
-                    tracing::info!("no room found");
-                }
-                let _ = promise.send(());
-                let update = Updates::NewMessage {
-                    room_id,
-                    author_id: self.player_id.clone(),
-                    body,
-                };
-                self.broadcast_update(update, connection_id).await;
             }
-            Cmd::ChangeTopic {
+            ClientCommand::ChangeRoomTopic {
                 room_id,
                 new_topic,
                 promise,
             } => {
-                let room = self.rooms.get_room(&room_id).await;
+                let result = self.change_room_topic(connection_id, room_id, new_topic).await;
-                if let Some(mut room) = room {
+                let _ = promise.send(result);
-                    room.set_topic(self.player_id.clone(), new_topic.clone()).await;
+            }
-                } else {
+            ClientCommand::GetRooms { promise } => {
-                    tracing::info!("no room found");
+                let result = self.get_rooms().await;
-                }
+                let _ = promise.send(Ok(result));
-                let _ = promise.send(());
+            }
-                let update = Updates::RoomTopicChanged { room_id, new_topic };
+            ClientCommand::SendDialogMessage {
-                self.broadcast_update(update, connection_id).await;
+                recipient,
+                body,
+                promise,
+            } => {
+                let result = self.send_dialog_message(connection_id, recipient, body).await;
+                let _ = promise.send(result);
+            }
+            ClientCommand::GetInfo { recipient, promise } => {
+                let result = self.check_user_existence(recipient).await;
+                let _ = promise.send(result);
+            }
+            ClientCommand::GetRoomHistory {
+                room_id,
+                limit,
+                promise,
+            } => {
+                let result = self.get_room_history(room_id, limit).await;
+                let _ = promise.send(result);
             }
         }
     }
 
+    #[tracing::instrument(skip(self), name = "Player::join_room")]
+    async fn join_room(&mut self, connection_id: ConnectionId, room_id: RoomId) -> Result<JoinResult> {
+        if self.banned_from.contains(&room_id) {
+            return Ok(JoinResult::Banned);
+        }
+        if self.my_rooms.contains_key(&room_id) {
+            return Ok(JoinResult::AlreadyJoined);
+        }
+
+        if let Some(remote_node) = self.room_location(&room_id) {
+            let req = JoinRoomReq {
+                room_id: room_id.as_inner(),
+                player_id: self.player_id.as_inner(),
+            };
+            self.services.client.join_room(remote_node, req).await?;
+            let room_storage_id = self.services.storage.create_or_retrieve_room_id_by_name(room_id.as_inner()).await?;
+            self.services.storage.add_room_member(room_storage_id, self.storage_id).await?;
+            self.my_rooms.insert(room_id.clone(), RoomRef::Remote { node_id: remote_node });
+            Ok(JoinResult::Success(RoomInfo {
+                id: room_id,
+                topic: "unknown".into(),
+                members: vec![],
+            }))
+        } else {
+            let room = match self.services.rooms.get_or_create_room(&self.services, room_id.clone()).await {
+                Ok(room) => room,
+                Err(e) => {
+                    log::error!("Failed to get or create room: {e}");
+                    todo!();
+                }
+            };
+            room.add_member(&self.services, &self.player_id, self.storage_id).await;
+            room.subscribe(&self.player_id, self.handle.clone()).await;
+            self.my_rooms.insert(room_id.clone(), RoomRef::Local(room.clone()));
+            let room_info = room.get_room_info().await;
+            let update = Updates::RoomJoined {
+                room_id,
+                new_member_id: self.player_id.clone(),
+            };
+            self.broadcast_update(update, connection_id).await;
+            Ok(JoinResult::Success(room_info))
+        }
+    }
+
+    #[tracing::instrument(skip(self), name = "Player::retrieve_room_history")]
+    async fn get_room_history(&mut self, room_id: RoomId, limit: u32) -> Result<RoomHistoryResult> {
+        let room = self.my_rooms.get(&room_id);
+        if let Some(room) = room {
+            match room {
+                RoomRef::Local(room) => {
+                    let res = room.get_message_history(&self.services, limit).await?;
+                    Ok(RoomHistoryResult::Success(res))
+                }
+                RoomRef::Remote { node_id: _ } => {
+                    tracing::error!("TODO Room #{room_id:?} is remote, cannot retrieve history");
+                    Err(anyhow!("Not implemented"))
+                }
+            }
+        } else {
+            tracing::debug!("Room #{room_id:?} not found");
+            Ok(RoomHistoryResult::NoSuchRoom)
+        }
+    }
+
+    #[tracing::instrument(skip(self), name = "Player::leave_room")]
+    async fn leave_room(&mut self, connection_id: ConnectionId, room_id: RoomId) -> Result<()> {
+        let room = self.my_rooms.remove(&room_id);
+        if let Some(room) = room {
+            match room {
+                RoomRef::Local(room) => {
+                    room.unsubscribe(&self.player_id).await;
+                    room.remove_member(&self.services, &self.player_id, self.storage_id).await;
+                }
+                RoomRef::Remote { node_id } => {
+                    let req = LeaveRoomReq {
+                        room_id: room_id.as_inner(),
+                        player_id: self.player_id.as_inner(),
+                    };
+                    self.services.client.leave_room(node_id, req).await?;
+                    let room_storage_id =
+                        self.services.storage.create_or_retrieve_room_id_by_name(room_id.as_inner()).await?;
+                    self.services.storage.remove_room_member(room_storage_id, self.storage_id).await?;
+                }
+            }
+        }
+        let update = Updates::RoomLeft {
+            room_id,
+            former_member_id: self.player_id.clone(),
+        };
+        self.broadcast_update(update, connection_id).await;
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self, body), name = "Player::send_room_message")]
+    async fn send_room_message(
+        &mut self,
+        connection_id: ConnectionId,
+        room_id: RoomId,
+        body: Str,
+    ) -> Result<SendMessageResult> {
+        let Some(room) = self.my_rooms.get(&room_id) else {
+            tracing::info!("Room with ID {room_id:?} not found");
+            return Ok(SendMessageResult::NoSuchRoom);
+        };
+        let created_at = Utc::now();
+        match room {
+            RoomRef::Local(room) => {
+                room.send_message(&self.services, &self.player_id, body.clone(), created_at.clone()).await?;
+            }
+            RoomRef::Remote { node_id } => {
+                let req = SendMessageReq {
+                    room_id: room_id.as_inner(),
+                    player_id: self.player_id.as_inner(),
+                    message: &*body,
+                    created_at: &*created_at.to_rfc3339(),
+                };
+                self.services.client.send_room_message(*node_id, req).await?;
+                self.services
+                    .broadcast(
+                        room_id.clone(),
+                        self.player_id.clone(),
+                        body.clone(),
+                        created_at.clone(),
+                    )
+                    .await;
+            }
+        }
+        let update = Updates::NewMessage {
+            room_id,
+            author_id: self.player_id.clone(),
+            body,
+            created_at,
+        };
+        self.broadcast_update(update, connection_id).await;
+        Ok(SendMessageResult::Success(created_at))
+    }
+
+    #[tracing::instrument(skip(self, new_topic), name = "Player::change_room_topic")]
+    async fn change_room_topic(
+        &mut self,
+        connection_id: ConnectionId,
+        room_id: RoomId,
+        new_topic: Str,
+    ) -> Result<ChangeRoomTopicResult> {
+        let Some(room) = self.my_rooms.get(&room_id) else {
+            tracing::debug!("Room with ID {room_id:?} not found");
+            return Ok(ChangeRoomTopicResult::NoSuchRoom);
+        };
+        match room {
+            RoomRef::Local(room) => {
+                room.set_topic(&self.services, &self.player_id, new_topic.clone()).await?;
+            }
+            RoomRef::Remote { node_id } => {
+                let req = SetRoomTopicReq {
+                    room_id: room_id.as_inner(),
+                    player_id: self.player_id.as_inner(),
+                    topic: &*new_topic,
+                };
+                self.services.client.set_room_topic(*node_id, req).await?;
+            }
+        }
+        let update = Updates::RoomTopicChanged { room_id, new_topic };
+        self.broadcast_update(update, connection_id).await;
+        Ok(ChangeRoomTopicResult::Success)
+    }
+
+    #[tracing::instrument(skip(self), name = "Player::get_rooms")]
+    async fn get_rooms(&self) -> Vec<RoomInfo> {
+        let mut response = vec![];
+        for (room_id, handle) in &self.my_rooms {
+            match handle {
+                RoomRef::Local(handle) => {
+                    response.push(handle.get_room_info().await);
+                }
+                RoomRef::Remote { .. } => {
+                    let room_info = RoomInfo {
+                        id: room_id.clone(),
+                        topic: "unknown".into(),
+                        members: vec![],
+                    };
+                    response.push(room_info);
+                }
+            }
+        }
+        response
+    }
+
+    #[tracing::instrument(skip(self, body), name = "Player::send_dialog_message")]
+    async fn send_dialog_message(&self, connection_id: ConnectionId, recipient: PlayerId, body: Str) -> Result<()> {
+        let created_at = Utc::now();
+        self.services.send_dialog_message(self.player_id.clone(), recipient.clone(), body.clone(), &created_at).await?;
+        let update = Updates::NewDialogMessage {
+            sender: self.player_id.clone(),
+            receiver: recipient.clone(),
+            body,
+            created_at,
+        };
+        self.broadcast_update(update, connection_id).await;
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self), name = "Player::check_user_existence")]
+    async fn check_user_existence(&self, recipient: PlayerId) -> Result<GetInfoResult> {
+        if self.services.storage.check_user_existence(recipient.as_inner().as_ref()).await? {
+            Ok(GetInfoResult::UserExists)
+        } else {
+            Ok(GetInfoResult::UserDoesntExist)
+        }
+    }
+
+    /// Broadcasts an update to all connections except the one with the given id.
+    ///
+    /// This is called after handling a client command.
+    /// Sending the update to the connection which sent the command is handled by the connection itself.
+    #[tracing::instrument(skip(self, update), name = "Player::broadcast_update")]
     async fn broadcast_update(&self, update: Updates, except: ConnectionId) {
         for (a, b) in &self.connections {
             if ConnectionId(a) == except {
                 continue;
             }
-            let _ = b.send(update.clone()).await;
+            let _ = b.send(ConnectionMessage::Update(update.clone())).await;
         }
     }
 }
+
+pub enum ConnectionMessage {
+    Update(Updates),
+    Stop(StopReason),
+}
+
+#[derive(Debug)]
+pub enum StopReason {
+    ServerShutdown,
+    InternalError,
+}
+
+pub enum PlayerConnectionResult {
+    Success(PlayerConnection),
+    PlayerNotFound,
+}

crates/lavina-core/src/repo/auth.rs

@@ -0,0 +1,20 @@
+use anyhow::Result;
+
+use crate::repo::Storage;
+
+impl Storage {
+    #[tracing::instrument(skip(self), name = "Storage::set_argon2_challenge")]
+    pub async fn set_argon2_challenge(&self, user_id: u32, hash: &str) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        sqlx::query(
+            "insert into challenges_argon2_password(user_id, hash)
+            values (?, ?)
+            on conflict(user_id) do update set hash = excluded.hash;",
+        )
+        .bind(user_id)
+        .bind(hash)
+        .execute(&mut *executor)
+        .await?;
+        Ok(())
+    }
+}

crates/lavina-core/src/repo/dialog.rs

@@ -0,0 +1,91 @@
+use anyhow::{anyhow, Result};
+use chrono::{DateTime, Utc};
+use sqlx::FromRow;
+
+use crate::repo::Storage;
+
+impl Storage {
+    #[tracing::instrument(skip(self), name = "Storage::retrieve_dialog")]
+    pub async fn retrieve_dialog(&self, participant_1: &str, participant_2: &str) -> Result<Option<StoredDialog>> {
+        let mut executor = self.conn.lock().await;
+        let res = sqlx::query_as(
+            "select r.id, r.participant_1, r.participant_2, r.message_count
+            from dialogs r join users u1 on r.participant_1 = u1.id join users u2 on r.participant_2 = u2.id
+            where u1.name = ? and u2.name = ?;",
+        )
+        .bind(participant_1)
+        .bind(participant_2)
+        .fetch_optional(&mut *executor)
+        .await?;
+
+        Ok(res)
+    }
+
+    #[tracing::instrument(skip(self, content, created_at), name = "Storage::insert_dialog_message")]
+    pub async fn insert_dialog_message(
+        &self,
+        dialog_id: u32,
+        id: u32,
+        author_id: &str,
+        content: &str,
+        created_at: &DateTime<Utc>,
+    ) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        let res: Option<(u32,)> = sqlx::query_as("select id from users where name = ?;")
+            .bind(author_id)
+            .fetch_optional(&mut *executor)
+            .await?;
+        let Some((author_id,)) = res else {
+            return Err(anyhow!("No such user"));
+        };
+        sqlx::query(
+            "insert into dialog_messages(dialog_id, id, author_id, content, created_at)
+            values (?, ?, ?, ?, ?);
+            update dialogs set message_count = message_count + 1 where id = ?;",
+        )
+        .bind(dialog_id)
+        .bind(id)
+        .bind(author_id)
+        .bind(content)
+        .bind(created_at)
+        .bind(dialog_id)
+        .execute(&mut *executor)
+        .await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self, created_at), name = "Storage::initialize_dialog")]
+    pub async fn initialize_dialog(
+        &self,
+        participant_1: &str,
+        participant_2: &str,
+        created_at: &DateTime<Utc>,
+    ) -> Result<StoredDialog> {
+        let mut executor = self.conn.lock().await;
+        let res: StoredDialog = sqlx::query_as(
+            "insert into dialogs(participant_1, participant_2, created_at)
+            values (
+                (select id from users where name = ?),
+                (select id from users where name = ?),
+                ?
+            )
+            returning id, participant_1, participant_2, message_count;",
+        )
+        .bind(participant_1)
+        .bind(participant_2)
+        .bind(&created_at)
+        .fetch_one(&mut *executor)
+        .await?;
+
+        Ok(res)
+    }
+}
+
+#[derive(FromRow)]
+pub struct StoredDialog {
+    pub id: u32,
+    pub participant_1: u32,
+    pub participant_2: u32,
+    pub message_count: u32,
+}

crates/lavina-core/src/repo/mod.rs

@@ -1,24 +1,26 @@
 //! Storage and persistence logic.
 
 use std::str::FromStr;
-use std::sync::Arc;
 
-use anyhow::anyhow;
 use serde::Deserialize;
 use sqlx::sqlite::SqliteConnectOptions;
-use sqlx::{ConnectOptions, Connection, FromRow, Sqlite, SqliteConnection, Transaction};
+use sqlx::{ConnectOptions, Connection, SqliteConnection};
 use tokio::sync::Mutex;
 
 use crate::prelude::*;
 
+mod auth;
+mod dialog;
+mod room;
+mod user;
+
 #[derive(Deserialize, Debug, Clone)]
 pub struct StorageConfig {
     pub db_path: String,
 }
 
-#[derive(Clone)]
 pub struct Storage {
-    conn: Arc<Mutex<SqliteConnection>>,
+    conn: Mutex<SqliteConnection>,
 }
 impl Storage {
     pub async fn open(config: StorageConfig) -> Result<Storage> {
@@ -30,144 +32,17 @@ impl Storage {
         migrator.run(&mut conn).await?;
         log::info!("Migrations passed");
 
-        let conn = Arc::new(Mutex::new(conn));
+        let conn = Mutex::new(conn);
         Ok(Storage { conn })
     }
 
-    pub async fn retrieve_user_by_name(&mut self, name: &str) -> Result<Option<StoredUser>> {
+    pub async fn close(self) {
-        let mut executor = self.conn.lock().await;
+        let res = self.conn.into_inner();
-        let res = sqlx::query_as(
+        match res.close().await {
-            "select u.id, u.name, c.password
+            Ok(_) => {}
-            from users u left join challenges_plain_password c on u.id = c.user_id
-            where u.name = ?;",
-        )
-        .bind(name)
-        .fetch_optional(&mut *executor)
-        .await?;
-
-        Ok(res)
-    }
-
-    pub async fn retrieve_room_by_name(&mut self, name: &str) -> Result<Option<StoredRoom>> {
-        let mut executor = self.conn.lock().await;
-        let res = sqlx::query_as(
-            "select id, name, topic, message_count
-            from rooms
-            where name = ?;",
-        )
-        .bind(name)
-        .fetch_optional(&mut *executor)
-        .await?;
-
-        Ok(res)
-    }
-
-    pub async fn create_new_room(&mut self, name: &str, topic: &str) -> Result<u32> {
-        let mut executor = self.conn.lock().await;
-        let (id,): (u32,) = sqlx::query_as(
-            "insert into rooms(name, topic)
-            values (?, ?)
-            returning id;",
-        )
-        .bind(name)
-        .bind(topic)
-        .fetch_one(&mut *executor)
-        .await?;
-
-        Ok(id)
-    }
-
-    pub async fn insert_message(&mut self, room_id: u32, id: u32, content: &str, author_id: &str) -> Result<()> {
-        let mut executor = self.conn.lock().await;
-        let res: Option<(u32,)> = sqlx::query_as("select id from users where name = ?;")
-            .bind(author_id)
-            .fetch_optional(&mut *executor)
-            .await?;
-        let Some((author_id,)) = res else {
-            return Err(anyhow!("No such user"));
-        };
-        sqlx::query(
-            "insert into messages(room_id, id, content, author_id)
-            values (?, ?, ?, ?);
-            update rooms set message_count = message_count + 1 where id = ?;",
-        )
-        .bind(room_id)
-        .bind(id)
-        .bind(content)
-        .bind(author_id)
-        .bind(room_id)
-        .execute(&mut *executor)
-        .await?;
-
-        Ok(())
-    }
-
-    pub async fn close(self) -> Result<()> {
-        let res = match Arc::try_unwrap(self.conn) {
-            Ok(e) => e,
-            Err(_) => return Err(fail("failed to acquire DB ownership on shutdown")),
-        };
-        let res = res.into_inner();
-        res.close().await?;
-        Ok(())
-    }
-
-    pub async fn create_user(&mut self, name: &str) -> Result<()> {
-        let query = sqlx::query(
-            "insert into users(name)
-            values (?);",
-        )
-        .bind(name);
-        let mut executor = self.conn.lock().await;
-        query.execute(&mut *executor).await?;
-
-        Ok(())
-    }
-
-    pub async fn set_password<'a>(&'a mut self, name: &'a str, pwd: &'a str) -> Result<Option<()>> {
-        async fn inner(txn: &mut Transaction<'_, Sqlite>, name: &str, pwd: &str) -> Result<Option<()>> {
-            let id: Option<(u32,)> = sqlx::query_as("select * from users where name = ? limit 1;")
-                .bind(name)
-                .fetch_optional(&mut **txn)
-                .await?;
-            let Some((id,)) = id else {
-                return Ok(None);
-            };
-            sqlx::query("insert or replace into challenges_plain_password(user_id, password) values (?, ?);")
-                .bind(id)
-                .bind(pwd)
-                .execute(&mut **txn)
-                .await?;
-            Ok(Some(()))
-        }
-
-        let mut executor = self.conn.lock().await;
-        let mut tx = executor.begin().await?;
-        let res = inner(&mut tx, name, pwd).await;
-        match res {
-            Ok(e) => {
-                tx.commit().await?;
-                Ok(e)
-            }
             Err(e) => {
-                tx.rollback().await?;
+                tracing::error!("Failed to close the DB connection: {e:?}");
-                Err(e)
             }
         }
     }
 }
-
-#[derive(FromRow)]
-pub struct StoredUser {
-    pub id: u32,
-    pub name: String,
-    pub password: Option<String>,
-}
-
-#[derive(FromRow)]
-pub struct StoredRoom {
-    pub id: u32,
-    pub name: String,
-    pub topic: String,
-    pub message_count: u32,
-}

crates/lavina-core/src/repo/room.rs

@@ -0,0 +1,230 @@
+use anyhow::{anyhow, Result};
+use chrono::{DateTime, Utc};
+use sqlx::FromRow;
+
+use crate::player::PlayerId;
+use crate::repo::Storage;
+use crate::room::{RoomId, StoredMessage};
+
+#[derive(FromRow)]
+pub struct StoredRoom {
+    pub id: u32,
+    pub name: String,
+    pub topic: String,
+    pub message_count: u32,
+}
+
+impl Storage {
+    #[tracing::instrument(skip(self), name = "Storage::retrieve_room_by_name")]
+    pub async fn retrieve_room_by_name(&self, name: &str) -> Result<Option<StoredRoom>> {
+        let mut executor = self.conn.lock().await;
+        let res = sqlx::query_as(
+            "select id, name, topic, message_count
+            from rooms
+            where name = ?;",
+        )
+        .bind(name)
+        .fetch_optional(&mut *executor)
+        .await?;
+
+        Ok(res)
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::retrieve_room_message_history")]
+    pub async fn get_room_message_history(&self, room_id: u32, limit: u32) -> Result<Vec<StoredMessage>> {
+        let mut executor = self.conn.lock().await;
+        let res = sqlx::query_as(
+            "
+                select
+                    *
+                from (
+                    select
+                        messages.id as id,
+                        content,
+                        created_at,
+                        users.name as author_name
+                    from
+                        messages
+                    join
+                        users
+                            on messages.author_id = users.id
+                    where
+                        room_id = ?
+                    order by
+                        messages.id desc
+                    limit ?
+                )
+                order by
+                    id asc;
+            ",
+        )
+        .bind(room_id)
+        .bind(limit)
+        .fetch_all(&mut *executor)
+        .await?;
+
+        Ok(res)
+    }
+
+    #[tracing::instrument(skip(self, topic), name = "Storage::create_new_room")]
+    pub async fn create_new_room(&self, name: &str, topic: &str) -> Result<u32> {
+        let mut executor = self.conn.lock().await;
+        let (id,): (u32,) = sqlx::query_as(
+            "insert into rooms(name, topic)
+            values (?, ?)
+            returning id;",
+        )
+        .bind(name)
+        .bind(topic)
+        .fetch_one(&mut *executor)
+        .await?;
+
+        Ok(id)
+    }
+
+    #[tracing::instrument(skip(self, content, created_at), name = "Storage::insert_room_message")]
+    pub async fn insert_room_message(
+        &self,
+        room_id: u32,
+        id: u32,
+        content: &str,
+        author_id: &str,
+        created_at: &DateTime<Utc>,
+    ) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        let res: Option<(u32,)> = sqlx::query_as("select id from users where name = ?;")
+            .bind(author_id)
+            .fetch_optional(&mut *executor)
+            .await?;
+        let Some((author_id,)) = res else {
+            return Err(anyhow!("No such user"));
+        };
+        sqlx::query(
+            "insert into messages(room_id, id, content, author_id, created_at)
+            values (?, ?, ?, ?, ?);
+            update rooms set message_count = message_count + 1 where id = ?;",
+        )
+        .bind(room_id)
+        .bind(id)
+        .bind(content)
+        .bind(author_id)
+        .bind(created_at)
+        .bind(room_id)
+        .execute(&mut *executor)
+        .await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::is_room_member")]
+    pub async fn is_room_member(&self, room_id: u32, player_id: u32) -> Result<bool> {
+        let mut executor = self.conn.lock().await;
+        let res: (u32,) = sqlx::query_as(
+            "
+                select
+                    count(*)
+                from
+                    memberships
+                where
+                    user_id = ? and room_id = ?;
+                ",
+        )
+        .bind(player_id)
+        .bind(room_id)
+        .fetch_one(&mut *executor)
+        .await?;
+        Ok(res.0 > 0)
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::add_room_member")]
+    pub async fn add_room_member(&self, room_id: u32, player_id: u32) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        sqlx::query(
+            "insert into memberships(user_id, room_id, status)
+            values (?, ?, 1);",
+        )
+        .bind(player_id)
+        .bind(room_id)
+        .execute(&mut *executor)
+        .await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::remove_room_member")]
+    pub async fn remove_room_member(&self, room_id: u32, player_id: u32) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        sqlx::query(
+            "delete from memberships
+            where user_id = ? and room_id = ?;",
+        )
+        .bind(player_id)
+        .bind(room_id)
+        .execute(&mut *executor)
+        .await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self, topic), name = "Storage::set_room_topic")]
+    pub async fn set_room_topic(&self, id: u32, topic: &str) -> Result<()> {
+        let mut executor = self.conn.lock().await;
+        sqlx::query(
+            "update rooms
+            set topic = ?
+            where id = ?;",
+        )
+        .bind(topic)
+        .bind(id)
+        .fetch_optional(&mut *executor)
+        .await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::create_or_retrieve_room_id_by_name")]
+    pub async fn create_or_retrieve_room_id_by_name(&self, name: &str) -> Result<u32> {
+        // TODO we don't need any info except the name on non-owning nodes, should remove stubs here
+        let mut executor = self.conn.lock().await;
+        let res: (u32,) = sqlx::query_as(
+            "insert into rooms(name, topic)
+            values (?, '')
+            on conflict(name) do update set name = excluded.name
+            returning id;",
+        )
+        .bind(name)
+        .fetch_one(&mut *executor)
+        .await?;
+
+        Ok(res.0)
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::get_rooms_of_a_user")]
+    pub async fn get_rooms_of_a_user(&self, user_id: u32) -> Result<Vec<RoomId>> {
+        let mut executor = self.conn.lock().await;
+        let res: Vec<(String,)> = sqlx::query_as(
+            "select r.name
+            from memberships m inner join rooms r on m.room_id = r.id
+            where m.user_id = ?;",
+        )
+        .bind(user_id)
+        .fetch_all(&mut *executor)
+        .await?;
+
+        res.into_iter().map(|(room_id,)| RoomId::try_from(room_id)).collect()
+    }
+
+    pub async fn get_users_of_a_room(&self, room_id: u32) -> Result<Vec<PlayerId>> {
+        let mut executor = self.conn.lock().await;
+        let res: Vec<(String,)> = sqlx::query_as(
+            "select u.name
+            from memberships m inner join users u on m.user_id = u.id
+            where m.room_id = ?;",
+        )
+        .bind(room_id)
+        .fetch_all(&mut *executor)
+        .await?;
+
+        Ok(res.into_iter()).and_then(|iter| iter.map(|(user_id,)| PlayerId::from(user_id)).collect())
+    }
+}

crates/lavina-core/src/repo/user.rs

@@ -0,0 +1,114 @@
+use anyhow::Result;
+use sqlx::{Connection, FromRow, Sqlite, Transaction};
+
+use crate::repo::Storage;
+
+#[derive(FromRow)]
+pub struct StoredUser {
+    pub id: u32,
+    pub name: String,
+    pub password: Option<String>,
+    pub argon2_hash: Option<Box<str>>,
+}
+
+impl Storage {
+    #[tracing::instrument(skip(self), name = "Storage::retrieve_user_by_name")]
+    pub async fn retrieve_user_by_name(&self, name: &str) -> Result<Option<StoredUser>> {
+        let mut executor = self.conn.lock().await;
+        let res = sqlx::query_as(
+            "select u.id, u.name, c.password, a.hash as argon2_hash
+            from users u left join challenges_plain_password c on u.id = c.user_id
+            left join challenges_argon2_password a on u.id = a.user_id
+            where u.name = ?;",
+        )
+        .bind(name)
+        .fetch_optional(&mut *executor)
+        .await?;
+
+        Ok(res)
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::check_user_existence")]
+    pub async fn check_user_existence(&self, username: &str) -> Result<bool> {
+        let mut executor = self.conn.lock().await;
+        let result: Option<(String,)> = sqlx::query_as("select name from users where name = ?;")
+            .bind(username)
+            .fetch_optional(&mut *executor)
+            .await?;
+
+        Ok(result.is_some())
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::create_user")]
+    pub async fn create_user(&self, name: &str) -> Result<()> {
+        let query = sqlx::query(
+            "insert into users(name)
+            values (?);",
+        )
+        .bind(name);
+        let mut executor = self.conn.lock().await;
+        query.execute(&mut *executor).await?;
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip(self, pwd), name = "Storage::set_password")]
+    pub async fn set_password(&self, name: &str, pwd: &str) -> Result<Option<()>> {
+        async fn inner(txn: &mut Transaction<'_, Sqlite>, name: &str, pwd: &str) -> Result<Option<()>> {
+            let id: Option<(u32,)> = sqlx::query_as("select * from users where name = ? limit 1;")
+                .bind(name)
+                .fetch_optional(&mut **txn)
+                .await?;
+            let Some((id,)) = id else {
+                return Ok(None);
+            };
+            sqlx::query("insert or replace into challenges_plain_password(user_id, password) values (?, ?);")
+                .bind(id)
+                .bind(pwd)
+                .execute(&mut **txn)
+                .await?;
+            Ok(Some(()))
+        }
+
+        let mut executor = self.conn.lock().await;
+        let mut tx = executor.begin().await?;
+        let res = inner(&mut tx, name, pwd).await;
+        match res {
+            Ok(e) => {
+                tx.commit().await?;
+                Ok(e)
+            }
+            Err(e) => {
+                tx.rollback().await?;
+                Err(e)
+            }
+        }
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::retrieve_user_id_by_name")]
+    pub async fn retrieve_user_id_by_name(&self, name: &str) -> Result<Option<u32>> {
+        let mut executor = self.conn.lock().await;
+        let res: Option<(u32,)> = sqlx::query_as("select u.id from users u where u.name = ?;")
+            .bind(name)
+            .fetch_optional(&mut *executor)
+            .await?;
+
+        Ok(res.map(|(id,)| id))
+    }
+
+    #[tracing::instrument(skip(self), name = "Storage::create_or_retrieve_user_id_by_name")]
+    pub async fn create_or_retrieve_user_id_by_name(&self, name: &str) -> Result<u32> {
+        let mut executor = self.conn.lock().await;
+        let res: (u32,) = sqlx::query_as(
+            "insert into users(name)
+            values (?)
+            on conflict(name) do update set name = excluded.name
+            returning id;",
+        )
+        .bind(name)
+        .fetch_one(&mut *executor)
+        .await?;
+
+        Ok(res.0)
+    }
+}

crates/lavina-core/src/room.rs

@@ -1,19 +1,24 @@
 //! Domain of rooms — chats with multiple participants.
+use std::collections::HashSet;
 use std::{collections::HashMap, hash::Hash, sync::Arc};
 
+use chrono::{DateTime, Utc};
 use prometheus::{IntGauge, Registry as MetricRegistry};
 use serde::Serialize;
+use sqlx::sqlite::SqliteRow;
+use sqlx::{FromRow, Row};
 use tokio::sync::RwLock as AsyncRwLock;
 
 use crate::player::{PlayerHandle, PlayerId, Updates};
 use crate::prelude::*;
-use crate::repo::Storage;
+use crate::{LavinaCore, Services};
 
 /// Opaque room id
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize)]
 pub struct RoomId(Str);
+
 impl RoomId {
-    pub fn from(str: impl Into<Str>) -> Result<RoomId> {
+    pub fn try_from(str: impl Into<Str>) -> Result<RoomId> {
         let bytes = str.into();
         if bytes.len() > 32 {
             return Err(anyhow::Error::msg("Room name cannot be longer than 32 symbols"));
@@ -31,54 +36,40 @@ impl RoomId {
     }
 }
 
-/// Shared datastructure for storing metadata about rooms.
+/// Shared data structure for storing metadata about rooms.
-#[derive(Clone)]
+pub(crate) struct RoomRegistry(AsyncRwLock<RoomRegistryInner>);
-pub struct RoomRegistry(Arc<AsyncRwLock<RoomRegistryInner>>);
+
 impl RoomRegistry {
-    pub fn new(metrics: &mut MetricRegistry, storage: Storage) -> Result<RoomRegistry> {
+    pub fn new(metrics: &mut MetricRegistry) -> Result<RoomRegistry> {
         let metric_active_rooms = IntGauge::new("chat_rooms_active", "Number of alive room actors")?;
         metrics.register(Box::new(metric_active_rooms.clone()))?;
         let inner = RoomRegistryInner {
             rooms: HashMap::new(),
             metric_active_rooms,
-            storage,
         };
-        Ok(RoomRegistry(Arc::new(AsyncRwLock::new(inner))))
+        Ok(RoomRegistry(AsyncRwLock::new(inner)))
     }
 
-    pub async fn get_or_create_room(&mut self, room_id: RoomId) -> Result<RoomHandle> {
+    pub fn shutdown(self) {
+        // TODO iterate over rooms and stop them
+    }
+
+    #[tracing::instrument(skip(self, services), name = "RoomRegistry::get_or_create_room")]
+    pub async fn get_or_create_room(&self, services: &Services, room_id: RoomId) -> Result<RoomHandle> {
         let mut inner = self.0.write().await;
-        if let Some(room_handle) = inner.rooms.get(&room_id) {
+        if let Some(room_handle) = inner.get_or_load_room(services, &room_id).await? {
-            // room was already loaded into memory
-            log::debug!("Room {} was loaded already", &room_id.0);
             Ok(room_handle.clone())
-        } else if let Some(stored_room) = inner.storage.retrieve_room_by_name(&*room_id.0).await? {
-            // room exists, but was not loaded
-            log::debug!("Loading room {}...", &room_id.0);
-            let room = Room {
-                storage_id: stored_room.id,
-                room_id: room_id.clone(),
-                subscriptions: HashMap::new(), // TODO figure out how to populate subscriptions
-                topic: stored_room.topic.into(),
-                message_count: stored_room.message_count,
-                storage: inner.storage.clone(),
-            };
-            let room_handle = RoomHandle(Arc::new(AsyncRwLock::new(room)));
-            inner.rooms.insert(room_id, room_handle.clone());
-            inner.metric_active_rooms.inc();
-            Ok(room_handle)
         } else {
-            // room does not exist, create it and load
             log::debug!("Creating room {}...", &room_id.0);
             let topic = "New room";
-            let id = inner.storage.create_new_room(&*room_id.0, &*topic).await?;
+            let id = services.storage.create_new_room(&*room_id.0, &*topic).await?;
             let room = Room {
                 storage_id: id,
                 room_id: room_id.clone(),
                 subscriptions: HashMap::new(),
+                members: HashSet::new(),
                 topic: topic.into(),
                 message_count: 0,
-                storage: inner.storage.clone(),
             };
             let room_handle = RoomHandle(Arc::new(AsyncRwLock::new(room)));
             inner.rooms.insert(room_id, room_handle.clone());
@@ -87,12 +78,13 @@ impl RoomRegistry {
         }
     }
 
-    pub async fn get_room(&self, room_id: &RoomId) -> Option<RoomHandle> {
+    #[tracing::instrument(skip(self, services), name = "RoomRegistry::get_room")]
-        let inner = self.0.read().await;
+    pub async fn get_room(&self, services: &Services, room_id: &RoomId) -> Result<Option<RoomHandle>> {
-        let res = inner.rooms.get(room_id);
+        let mut inner = self.0.write().await;
-        res.map(|r| r.clone())
+        inner.get_or_load_room(services, room_id).await
     }
 
+    #[tracing::instrument(skip(self), name = "RoomRegistry::get_all_rooms")]
     pub async fn get_all_rooms(&self) -> Vec<RoomInfo> {
         let handles = {
             let inner = self.0.read().await;
@@ -110,20 +102,82 @@ impl RoomRegistry {
 struct RoomRegistryInner {
     rooms: HashMap<RoomId, RoomHandle>,
     metric_active_rooms: IntGauge,
-    storage: Storage,
+}
+
+impl RoomRegistryInner {
+    #[tracing::instrument(skip(self, services), name = "RoomRegistryInner::get_or_load_room")]
+    async fn get_or_load_room(&mut self, services: &Services, room_id: &RoomId) -> Result<Option<RoomHandle>> {
+        if let Some(room_handle) = self.rooms.get(room_id) {
+            log::debug!("Room {} was loaded already", &room_id.0);
+            Ok(Some(room_handle.clone()))
+        } else if let Some(stored_room) = services.storage.retrieve_room_by_name(&*room_id.0).await? {
+            log::debug!("Loading room {}...", &room_id.0);
+            let users = services.storage.get_users_of_a_room(stored_room.id).await?;
+            let room = Room {
+                storage_id: stored_room.id,
+                room_id: room_id.clone(),
+                subscriptions: HashMap::new(),
+                members: HashSet::from_iter(users.into_iter()),
+                topic: stored_room.topic.into(),
+                message_count: stored_room.message_count,
+            };
+            let room_handle = RoomHandle(Arc::new(AsyncRwLock::new(room)));
+            self.rooms.insert(room_id.clone(), room_handle.clone());
+            self.metric_active_rooms.inc();
+            Ok(Some(room_handle))
+        } else {
+            tracing::debug!("Room {} does not exist", &room_id.0);
+            Ok(None)
+        }
+    }
 }
 
 #[derive(Clone)]
 pub struct RoomHandle(Arc<AsyncRwLock<Room>>);
+
 impl RoomHandle {
-    pub async fn subscribe(&self, player_id: PlayerId, player_handle: PlayerHandle) {
+    #[tracing::instrument(skip(self, player_handle), name = "RoomHandle::subscribe")]
+    pub async fn subscribe(&self, player_id: &PlayerId, player_handle: PlayerHandle) {
         let mut lock = self.0.write().await;
-        lock.add_subscriber(player_id, player_handle).await;
+        tracing::info!("Adding a subscriber to a room");
+        lock.subscriptions.insert(player_id.clone(), player_handle);
     }
 
+    #[tracing::instrument(skip(self, services), name = "RoomHandle::add_member")]
+    pub async fn add_member(&self, services: &Services, player_id: &PlayerId, player_storage_id: u32) {
+        let mut lock = self.0.write().await;
+        tracing::info!("Adding a new member to a room");
+        let room_storage_id = lock.storage_id;
+        if !services.storage.is_room_member(room_storage_id, player_storage_id).await.unwrap() {
+            services.storage.add_room_member(room_storage_id, player_storage_id).await.unwrap();
+        } else {
+            tracing::warn!("User {:#?} has already been added to the room.", player_id);
+        }
+        lock.members.insert(player_id.clone());
+        let update = Updates::RoomJoined {
+            room_id: lock.room_id.clone(),
+            new_member_id: player_id.clone(),
+        };
+        lock.broadcast_update(update, player_id).await;
+    }
+
+    pub async fn get_message_history(&self, services: &Services, limit: u32) -> Result<Vec<StoredMessage>> {
+        services.storage.get_room_message_history(self.0.read().await.storage_id, limit).await
+    }
+
+    #[tracing::instrument(skip(self), name = "RoomHandle::unsubscribe")]
     pub async fn unsubscribe(&self, player_id: &PlayerId) {
         let mut lock = self.0.write().await;
         lock.subscriptions.remove(player_id);
+    }
+
+    #[tracing::instrument(skip(self, services), name = "RoomHandle::remove_member")]
+    pub async fn remove_member(&self, services: &Services, player_id: &PlayerId, player_storage_id: u32) {
+        let mut lock = self.0.write().await;
+        tracing::info!("Removing a member from a room");
+        let room_storage_id = lock.storage_id;
+        services.storage.remove_room_member(room_storage_id, player_storage_id).await.unwrap();
+        lock.members.remove(player_id);
         let update = Updates::RoomLeft {
             room_id: lock.room_id.clone(),
             former_member_id: player_id.clone(),
@@ -131,68 +185,97 @@ impl RoomHandle {
         lock.broadcast_update(update, player_id).await;
     }
 
-    pub async fn send_message(&self, player_id: PlayerId, body: Str) {
+    #[tracing::instrument(skip(self, services, body, created_at), name = "RoomHandle::send_message")]
+    pub async fn send_message(
+        &self,
+        services: &Services,
+        player_id: &PlayerId,
+        body: Str,
+        created_at: DateTime<Utc>,
+    ) -> Result<()> {
         let mut lock = self.0.write().await;
-        let res = lock.send_message(player_id, body).await;
+        let res = lock.send_message(services, player_id, body, created_at).await;
-        if let Err(err) = res {
+        if let Err(err) = &res {
-            log::warn!("Failed to send message: {err:?}");
+            tracing::error!("Failed to send message: {err:?}");
         }
+        res
     }
 
+    #[tracing::instrument(skip(self), name = "RoomHandle::get_room_info")]
     pub async fn get_room_info(&self) -> RoomInfo {
         let lock = self.0.read().await;
         RoomInfo {
             id: lock.room_id.clone(),
-            members: lock.subscriptions.keys().map(|x| x.clone()).collect::<Vec<_>>(),
+            members: lock.members.iter().map(|x| x.clone()).collect::<Vec<_>>(),
             topic: lock.topic.clone(),
         }
     }
 
-    pub async fn set_topic(&mut self, changer_id: PlayerId, new_topic: Str) {
+    #[tracing::instrument(skip(self, services, new_topic), name = "RoomHandle::set_topic")]
+    pub async fn set_topic(&self, services: &Services, changer_id: &PlayerId, new_topic: Str) -> Result<()> {
         let mut lock = self.0.write().await;
+        let storage_id = lock.storage_id;
         lock.topic = new_topic.clone();
+        services.storage.set_room_topic(storage_id, &new_topic).await?;
         let update = Updates::RoomTopicChanged {
             room_id: lock.room_id.clone(),
             new_topic: new_topic.clone(),
         };
-        lock.broadcast_update(update, &changer_id).await;
+        lock.broadcast_update(update, changer_id).await;
+        Ok(())
     }
 }
 
 struct Room {
+    /// The numeric node-local id of the room as it is stored in the database.
     storage_id: u32,
+    /// The cluster-global id of the room.
     room_id: RoomId,
+    /// Player actors on the local node which are subscribed to this room's updates.
     subscriptions: HashMap<PlayerId, PlayerHandle>,
+    /// Members of the room.
+    members: HashSet<PlayerId>,
+    /// The total number of messages. Used to calculate the id of the new message.
     message_count: u32,
     topic: Str,
-    storage: Storage,
 }
-impl Room {
-    async fn add_subscriber(&mut self, player_id: PlayerId, player_handle: PlayerHandle) {
-        tracing::info!("Adding a subscriber to room");
-        self.subscriptions.insert(player_id.clone(), player_handle);
-        let update = Updates::RoomJoined {
-            room_id: self.room_id.clone(),
-            new_member_id: player_id.clone(),
-        };
-        self.broadcast_update(update, &player_id).await;
-    }
 
-    async fn send_message(&mut self, author_id: PlayerId, body: Str) -> Result<()> {
+impl Room {
+    #[tracing::instrument(skip(self, services, body, created_at), name = "Room::send_message")]
+    async fn send_message(
+        &mut self,
+        services: &Services,
+        author_id: &PlayerId,
+        body: Str,
+        created_at: DateTime<Utc>,
+    ) -> Result<()> {
         tracing::info!("Adding a message to room");
-        self.storage
+        services
-            .insert_message(self.storage_id, self.message_count, &body, &*author_id.as_inner())
+            .storage
+            .insert_room_message(
+                self.storage_id,
+                self.message_count,
+                &body,
+                &*author_id.as_inner(),
+                &created_at,
+            )
             .await?;
         self.message_count += 1;
         let update = Updates::NewMessage {
             room_id: self.room_id.clone(),
             author_id: author_id.clone(),
             body,
+            created_at,
         };
-        self.broadcast_update(update, &author_id).await;
+        self.broadcast_update(update, author_id).await;
         Ok(())
     }
 
+    /// Broadcasts an update to all players except the one who caused the update.
+    ///
+    /// This is called after handling a client command.
+    /// Sending the update to the player who sent the command is handled by the player actor.
+    #[tracing::instrument(skip(self, update), name = "Room::broadcast_update")]
     async fn broadcast_update(&self, update: Updates, except: &PlayerId) {
         tracing::debug!("Broadcasting an update to {} subs", self.subscriptions.len());
         for (player_id, sub) in &self.subscriptions {
@@ -211,3 +294,11 @@ pub struct RoomInfo {
     pub members: Vec<PlayerId>,
     pub topic: Str,
 }
+
+#[derive(Debug, FromRow)]
+pub struct StoredMessage {
+    pub id: u32,
+    pub author_name: String,
+    pub content: String,
+    pub created_at: DateTime<Utc>,
+}

crates/mgmt-api/src/lib.rs

@@ -1,5 +1,7 @@
 use serde::{Deserialize, Serialize};
 
+pub mod rooms;
+
 #[derive(Serialize, Deserialize)]
 pub struct ErrorResponse<'a> {
     pub code: &'a str,
@@ -11,6 +13,11 @@ pub struct CreatePlayerRequest<'a> {
     pub name: &'a str,
 }
 
+#[derive(Serialize, Deserialize)]
+pub struct StopPlayerRequest<'a> {
+    pub name: &'a str,
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct ChangePasswordRequest<'a> {
     pub player_name: &'a str,
@@ -19,6 +26,7 @@ pub struct ChangePasswordRequest<'a> {
 
 pub mod paths {
     pub const CREATE_PLAYER: &'static str = "/mgmt/create_player";
+    pub const STOP_PLAYER: &'static str = "/mgmt/stop_player";
     pub const SET_PASSWORD: &'static str = "/mgmt/set_password";
 }
 

crates/mgmt-api/src/rooms.rs

@@ -0,0 +1,24 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub struct SendMessageReq<'a> {
+    pub room_id: &'a str,
+    pub author_id: &'a str,
+    pub message: &'a str,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct SetTopicReq<'a> {
+    pub room_id: &'a str,
+    pub author_id: &'a str,
+    pub topic: &'a str,
+}
+
+pub mod paths {
+    pub const SEND_MESSAGE: &'static str = "/mgmt/rooms/send_message";
+    pub const SET_TOPIC: &'static str = "/mgmt/rooms/set_topic";
+}
+
+pub mod errors {
+    pub const ROOM_NOT_FOUND: &'static str = "room_not_found";
+}

crates/projection-irc/Cargo.toml

@@ -12,6 +12,7 @@ tokio.workspace = true
 prometheus.workspace = true
 futures-util.workspace = true
 nonempty.workspace = true
+chrono.workspace = true
 bitflags = "2.4.1"
 proto-irc = { path = "../proto-irc" }
 sasl = { path = "../sasl" }

crates/projection-irc/rustfmt.toml

@@ -1,2 +0,0 @@
-max_width = 120
-chain_width = 120

crates/projection-irc/src/cap.rs

@@ -1,9 +1,10 @@
 use bitflags::bitflags;
 
 bitflags! {
-    #[derive(Debug)]
+    #[derive(Debug, Clone, Copy)]
     pub struct Capabilities: u32 {
-        const None = 0;
         const Sasl = 1 << 0;
+        const ServerTime = 1 << 1;
+        const ChatHistory = 1 << 2;
     }
 }

crates/projection-irc/src/handler.rs

@@ -0,0 +1,20 @@
+use std::future::Future;
+
+use anyhow::Result;
+use tokio::io::AsyncWrite;
+
+use crate::RegisteredUser;
+use lavina_core::player::PlayerConnection;
+use lavina_core::prelude::Str;
+
+pub struct IrcConnection<'a, T: AsyncWrite + Unpin> {
+    pub server_name: Str,
+    pub writer: &'a mut T,
+    pub player_connection: &'a mut PlayerConnection,
+    pub user: &'a RegisteredUser,
+}
+
+/// Represents a client-to-server IRC message that can be handled by the server.
+pub trait IrcCommand {
+    fn handle_with(&self, conn: &mut IrcConnection<impl AsyncWrite + Unpin>) -> impl Future<Output = Result<()>>;
+}

crates/projection-irc/src/history.rs

@@ -0,0 +1,57 @@
+use anyhow::Result;
+use chrono::SecondsFormat;
+use tokio::io::{AsyncWrite, AsyncWriteExt};
+
+use crate::cap::Capabilities;
+use crate::handler::{IrcCommand, IrcConnection};
+use lavina_core::player::RoomHistoryResult;
+use lavina_core::room::RoomId;
+use proto_irc::client::ChatHistory;
+use proto_irc::server::{ServerMessage, ServerMessageBody};
+use proto_irc::{Chan, Recipient, Tag};
+
+impl IrcCommand for ChatHistory {
+    async fn handle_with(&self, conn: &mut IrcConnection<'_, impl AsyncWrite + Unpin>) -> Result<()> {
+        if !conn.user.enabled_capabilities.contains(Capabilities::ChatHistory) {
+            tracing::debug!(
+                "Requested chat history for user {:?} even though the capability was not negotiated",
+                conn.user.nickname
+            );
+            return Ok(());
+        }
+        let channel_name = match self.chan.clone() {
+            Chan::Global(chan) => chan,
+            // TODO Respond with an error when a local channel is requested
+            Chan::Local(chan) => chan,
+        };
+        let room_id = &RoomId::try_from(channel_name.clone())?;
+        let res = conn.player_connection.get_room_message_history(room_id, self.limit).await?;
+        match res {
+            RoomHistoryResult::Success(messages) => {
+                for message in messages {
+                    let mut tags = vec![];
+                    if conn.user.enabled_capabilities.contains(Capabilities::ServerTime) {
+                        let tag = Tag {
+                            key: "time".into(),
+                            value: Some(message.created_at.to_rfc3339_opts(SecondsFormat::Millis, true).into()),
+                        };
+                        tags.push(tag);
+                    }
+                    ServerMessage {
+                        tags,
+                        sender: Some(message.author_name.into()),
+                        body: ServerMessageBody::PrivateMessage {
+                            target: Recipient::Chan(self.chan.clone()),
+                            body: message.content.into(),
+                        },
+                    }
+                    .write_async(conn.writer)
+                    .await?;
+                }
+                conn.writer.flush().await?;
+            }
+            RoomHistoryResult::NoSuchRoom => {}
+        }
+        Ok(())
+    }
+}

crates/projection-irc/src/whois.rs

@@ -0,0 +1,51 @@
+use anyhow::Result;
+use tokio::io::AsyncWrite;
+
+use crate::handler::{IrcCommand, IrcConnection};
+use lavina_core::player::GetInfoResult;
+use lavina_core::player::PlayerId;
+use lavina_core::prelude::Str;
+use proto_irc::client::Whois;
+use proto_irc::commands::whois::error::{ErrNoNicknameGiven431, ErrNoSuchNick401};
+use proto_irc::commands::whois::response::RplEndOfWhois318;
+use proto_irc::response::IrcResponseMessage;
+use proto_irc::response::WriteResponse;
+
+impl IrcCommand for Whois {
+    async fn handle_with(&self, conn: &mut IrcConnection<'_, impl AsyncWrite + Unpin>) -> Result<()> {
+        match self {
+            Whois::Nick(nick) => handle_nick_target(nick.clone(), conn).await?,
+            Whois::TargetNick(_, nick) => handle_nick_target(nick.clone(), conn).await?,
+            Whois::EmptyArgs => {
+                IrcResponseMessage::empty_tags(
+                    Some(conn.server_name.clone()),
+                    ErrNoNicknameGiven431::new(conn.server_name.clone()),
+                )
+                .write_response(conn.writer)
+                .await?
+            }
+        }
+        Ok(())
+    }
+}
+
+async fn handle_nick_target(nick: Str, conn: &mut IrcConnection<'_, impl AsyncWrite + Unpin>) -> Result<()> {
+    match conn.player_connection.check_user_existence(PlayerId::from(nick.clone())?).await? {
+        GetInfoResult::UserExists => {}
+        GetInfoResult::UserDoesntExist => {
+            IrcResponseMessage::empty_tags(
+                Some(conn.server_name.clone()),
+                ErrNoSuchNick401::new(conn.user.nickname.clone(), nick.clone()),
+            )
+            .write_response(conn.writer)
+            .await?
+        }
+    }
+    IrcResponseMessage::empty_tags(
+        Some(conn.server_name.clone()),
+        RplEndOfWhois318::new(conn.user.nickname.clone(), nick.clone()),
+    )
+    .write_response(conn.writer)
+    .await?;
+    Ok(())
+}

crates/projection-irc/tests/lib.rs

@@ -1,20 +1,27 @@
+use std::io::ErrorKind;
 use std::time::Duration;
 
 use anyhow::{anyhow, Result};
+use chrono::{DateTime, SecondsFormat};
 use prometheus::Registry as MetricsRegistry;
 use tokio::io::{AsyncReadExt, AsyncWriteExt, BufReader};
 use tokio::net::tcp::{ReadHalf, WriteHalf};
 use tokio::net::TcpStream;
 
+use lavina_core::clustering::{ClusterConfig, ClusterMetadata};
+use lavina_core::player::{JoinResult, PlayerConnectionResult, PlayerId, SendMessageResult};
 use lavina_core::repo::{Storage, StorageConfig};
-use lavina_core::{player::PlayerRegistry, room::RoomRegistry};
+use lavina_core::room::RoomId;
+use lavina_core::LavinaCore;
+use projection_irc::APP_VERSION;
 use projection_irc::{launch, read_irc_message, RunningServer, ServerConfig};
 
 struct TestScope<'a> {
     reader: BufReader<ReadHalf<'a>>,
     writer: WriteHalf<'a>,
     buffer: Vec<u8>,
-    pub timeout: Duration,
+    pub timeout_optimistic: Duration,
+    pub timeout_pessimistic: Duration,
 }
 
 impl<'a> TestScope<'a> {
@@ -22,12 +29,14 @@ impl<'a> TestScope<'a> {
         let (reader, writer) = stream.split();
         let reader = BufReader::new(reader);
         let buffer = vec![];
-        let timeout = Duration::from_millis(100);
+        let timeout_optimistic = Duration::from_millis(50);
+        let timeout_pessimistic = Duration::from_millis(2000);
         TestScope {
             reader,
             writer,
             buffer,
-            timeout,
+            timeout_optimistic,
+            timeout_pessimistic,
         }
     }
 
@@ -40,15 +49,48 @@ impl<'a> TestScope<'a> {
 
     async fn expect(&mut self, str: &str) -> Result<()> {
         tracing::debug!("Expecting {}", str);
-        let len = tokio::time::timeout(self.timeout, read_irc_message(&mut self.reader, &mut self.buffer)).await??;
+        let len = tokio::time::timeout(
+            self.timeout_pessimistic,
+            read_irc_message(&mut self.reader, &mut self.buffer),
+        )
+        .await??;
         assert_eq!(std::str::from_utf8(&self.buffer[..len - 2])?, str);
         self.buffer.clear();
         Ok(())
     }
 
+    async fn expect_that(&mut self, validate: impl FnOnce(&str) -> bool) -> Result<()> {
+        let len = tokio::time::timeout(
+            self.timeout_pessimistic,
+            read_irc_message(&mut self.reader, &mut self.buffer),
+        )
+        .await??;
+        let msg = std::str::from_utf8(&self.buffer[..len - 2])?;
+        if !validate(msg) {
+            return Err(anyhow!("unexpected message: {:?}", msg));
+        }
+        self.buffer.clear();
+        Ok(())
+    }
+
+    async fn expect_server_introduction(&mut self, nick: &str) -> Result<()> {
+        self.expect(&format!(":testserver 001 {nick} :Welcome to testserver Server")).await?;
+        self.expect(&format!(":testserver 002 {nick} :Welcome to testserver Server")).await?;
+        self.expect(&format!(":testserver 003 {nick} :Welcome to testserver Server")).await?;
+        self.expect(&format!(
+            ":testserver 004 {nick} testserver {APP_VERSION} r CFILPQbcefgijklmnopqrstvz"
+        ))
+        .await?;
+        self.expect(&format!(
+            ":testserver 005 {nick} CHANTYPES=# :are supported by this server"
+        ))
+        .await?;
+        Ok(())
+    }
+
     async fn expect_eof(&mut self) -> Result<()> {
         let mut buf = [0; 1];
-        let len = tokio::time::timeout(self.timeout, self.reader.read(&mut buf)).await??;
+        let len = tokio::time::timeout(self.timeout_pessimistic, self.reader.read(&mut buf)).await??;
         if len != 0 {
             return Err(anyhow!("not a eof"));
         }
@@ -57,53 +99,85 @@ impl<'a> TestScope<'a> {
 
     async fn expect_nothing(&mut self) -> Result<()> {
         let mut buf = [0; 1];
-        match tokio::time::timeout(self.timeout, self.reader.read(&mut buf)).await {
+        match tokio::time::timeout(self.timeout_optimistic, self.reader.read(&mut buf)).await {
             Ok(res) => Err(anyhow!("received something: {:?}", res)),
             Err(_) => Ok(()),
         }
     }
+
+    async fn expect_cap_ls(&mut self) -> Result<()> {
+        self.expect(":testserver CAP * LS :sasl=PLAIN server-time draft/chathistory").await?;
+        Ok(())
+    }
 }
 
 struct TestServer {
-    metrics: MetricsRegistry,
+    core: LavinaCore,
-    storage: Storage,
-    rooms: RoomRegistry,
-    players: PlayerRegistry,
     server: RunningServer,
 }
+
 impl TestServer {
     async fn start() -> Result<TestServer> {
         let _ = tracing_subscriber::fmt::try_init();
         let config = ServerConfig {
-            listen_on: "127.0.0.1:0".parse().unwrap(),
+            listen_on: "127.0.0.1:0".parse()?,
             server_name: "testserver".into(),
         };
         let mut metrics = MetricsRegistry::new();
-        let mut storage = Storage::open(StorageConfig {
+        let storage = Storage::open(StorageConfig {
             db_path: ":memory:".into(),
         })
         .await?;
-        let rooms = RoomRegistry::new(&mut metrics, storage.clone()).unwrap();
+        let cluster_config = ClusterConfig {
-        let players = PlayerRegistry::empty(rooms.clone(), &mut metrics).unwrap();
+            addresses: vec![],
-        let server = launch(config, players.clone(), rooms.clone(), metrics.clone(), storage.clone()).await.unwrap();
+            metadata: ClusterMetadata {
-        Ok(TestServer {
+                node_id: 0,
-            metrics,
+                main_owner: 0,
-            storage,
+                rooms: Default::default(),
-            rooms,
+            },
-            players,
+        };
-            server,
+        let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
-        })
+        let server = launch(config, core.clone(), metrics.clone()).await?;
+        Ok(TestServer { core, server })
+    }
+
+    async fn reboot(self) -> Result<TestServer> {
+        let config = ServerConfig {
+            listen_on: "127.0.0.1:0".parse()?,
+            server_name: "testserver".into(),
+        };
+        let cluster_config = ClusterConfig {
+            addresses: vec![],
+            metadata: ClusterMetadata {
+                node_id: 0,
+                main_owner: 0,
+                rooms: Default::default(),
+            },
+        };
+        let TestServer { core, server } = self;
+        server.terminate().await?;
+        let storage = core.shutdown().await;
+        let mut metrics = MetricsRegistry::new();
+        let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
+        let server = launch(config, core.clone(), metrics.clone()).await?;
+        Ok(TestServer { core, server })
+    }
+
+    async fn shutdown(self) {
+        let _ = self.server.terminate().await;
+        let storage = self.core.shutdown().await;
+        let _ = storage.close().await;
     }
 }
 
 #[tokio::test]
 async fn scenario_basic() -> Result<()> {
-    let mut server = TestServer::start().await?;
+    let server = TestServer::start().await?;
 
     // test scenario
 
-    server.storage.create_user("tester").await?;
+    server.core.create_player(&PlayerId::from("tester")?).await?;
-    server.storage.set_password("tester", "password").await?;
+    server.core.set_password("tester", "password").await?;
 
     let mut stream = TcpStream::connect(server.server.addr).await?;
     let mut s = TestScope::new(&mut stream);
@@ -111,11 +185,7 @@ async fn scenario_basic() -> Result<()> {
     s.send("PASS password").await?;
     s.send("NICK tester").await?;
     s.send("USER UserName 0 * :Real Name").await?;
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect_server_introduction("tester").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
-    s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
     s.expect(":testserver ERROR :Leaving the server").await?;
@@ -125,7 +195,362 @@ async fn scenario_basic() -> Result<()> {
 
     // wrap up
 
-    server.server.terminate().await?;
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_basic_with_chathistory() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    s.send("NICK tester").await?;
+    s.send("CAP REQ :draft/chathistory").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.send("PASS password").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.expect(":testserver CAP tester ACK :draft/chathistory").await?;
+    s.send("CAP END").await?;
+
+    s.expect_server_introduction("tester").await?;
+    s.expect_nothing().await?;
+
+    s.send("JOIN #test").await?;
+    s.expect(":tester JOIN #test").await?;
+    s.expect(":testserver 332 tester #test :New room").await?;
+    s.expect(":testserver 353 tester = #test :tester").await?;
+    s.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+
+    s.send("PRIVMSG #test :Message1").await?;
+    s.send("PRIVMSG #test :Message2").await?;
+    s.send("PRIVMSG #test :Message3").await?;
+    s.send("PRIVMSG #test :Message4").await?;
+
+    s.send("CHATHISTORY LATEST #test * 1").await?;
+    s.expect(":tester PRIVMSG #test :Message4").await?;
+
+    s.send("CHATHISTORY LATEST #test * 3").await?;
+    s.expect(":tester PRIVMSG #test :Message2").await?;
+    s.expect(":tester PRIVMSG #test :Message3").await?;
+    s.expect(":tester PRIVMSG #test :Message4").await?;
+    s.expect_nothing().await?;
+
+    s.send("QUIT :Leaving").await?;
+    s.expect(":testserver ERROR :Leaving the server").await?;
+    s.expect_eof().await?;
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_join_and_reboot() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    // Open a connection and join a channel
+
+    s.send("PASS password").await?;
+    s.send("NICK tester").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.expect_server_introduction("tester").await?;
+    s.expect_nothing().await?;
+    s.send("JOIN #test").await?;
+    s.expect(":tester JOIN #test").await?;
+    s.expect(":testserver 332 tester #test :New room").await?;
+    s.expect(":testserver 353 tester = #test :tester").await?;
+    s.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+    s.send("PRIVMSG #test :Hello").await?;
+    s.send("QUIT :Leaving").await?;
+    s.expect(":testserver ERROR :Leaving the server").await?;
+    s.expect_eof().await?;
+    stream.shutdown().await?;
+
+    // Open a new connection and expect to be force-joined to the channel
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    async fn test(s: &mut TestScope<'_>) -> Result<()> {
+        s.send("PASS password").await?;
+        s.send("NICK tester").await?;
+        s.send("USER UserName 0 * :Real Name").await?;
+        s.expect_server_introduction("tester").await?;
+        s.expect(":tester JOIN #test").await?;
+        s.expect(":testserver 332 tester #test :New room").await?;
+        s.expect(":testserver 353 tester = #test :tester").await?;
+        s.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+        s.send("QUIT :Leaving").await?;
+        s.expect(":testserver ERROR :Leaving the server").await?;
+        s.expect_eof().await?;
+        Ok(())
+    }
+    test(&mut s).await?;
+    stream.shutdown().await?;
+
+    // Reboot the server
+
+    let server = server.reboot().await?;
+
+    // Open a new connection and expect to be force-joined to the channel
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    test(&mut s).await?;
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_subscribe_after_reboot() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    server.core.create_player(&PlayerId::from("tester1")?).await?;
+    server.core.set_password("tester1", "password").await?;
+    server.core.create_player(&PlayerId::from("tester2")?).await?;
+    server.core.set_password("tester2", "password").await?;
+
+    let mut stream1 = TcpStream::connect(server.server.addr).await?;
+    let mut s1 = TestScope::new(&mut stream1);
+
+    // Open a connection, join a channel, close the connection
+
+    s1.send("PASS password").await?;
+    s1.send("NICK tester1").await?;
+    s1.send("USER UserName 0 * :Real Name").await?;
+    s1.expect_server_introduction("tester1").await?;
+    s1.expect_nothing().await?;
+    s1.send("JOIN #test").await?;
+    s1.expect(":tester1 JOIN #test").await?;
+    s1.expect(":testserver 332 tester1 #test :New room").await?;
+    s1.expect(":testserver 353 tester1 = #test :tester1").await?;
+    s1.expect(":testserver 366 tester1 #test :End of /NAMES list").await?;
+    s1.send("PRIVMSG #test :Hello").await?;
+    s1.send("QUIT :Leaving").await?;
+    s1.expect(":testserver ERROR :Leaving the server").await?;
+    s1.expect_eof().await?;
+    stream1.shutdown().await?;
+
+    let server = server.reboot().await?;
+
+    // Open a new connection and expect to be force-joined to the channel
+
+    let mut stream1 = TcpStream::connect(server.server.addr).await?;
+    let mut s1 = TestScope::new(&mut stream1);
+
+    s1.send("PASS password").await?;
+    s1.send("NICK tester1").await?;
+    s1.send("USER UserName 0 * :Real Name").await?;
+    s1.expect_server_introduction("tester1").await?;
+    s1.expect(":tester1 JOIN #test").await?;
+    s1.expect(":testserver 332 tester1 #test :New room").await?;
+    s1.expect(":testserver 353 tester1 = #test :tester1").await?;
+    s1.expect(":testserver 366 tester1 #test :End of /NAMES list").await?;
+
+    // Open a connection from the second player and join the channel
+
+    let mut stream2 = TcpStream::connect(server.server.addr).await?;
+    let mut s2 = TestScope::new(&mut stream2);
+
+    s2.send("PASS password").await?;
+    s2.send("NICK tester2").await?;
+    s2.send("USER UserName 0 * :Real Name").await?;
+    s2.expect_server_introduction("tester2").await?;
+    s2.send("JOIN #test").await?;
+    s2.expect(":tester2 JOIN #test").await?;
+    s2.expect(":testserver 332 tester2 #test :New room").await?;
+    s2.expect_that(|msg| {
+        msg == ":testserver 353 tester2 = #test :tester1 tester2"
+            || msg == ":testserver 353 tester2 = #test :tester2 tester1"
+    })
+    .await?;
+    s2.expect(":testserver 366 tester2 #test :End of /NAMES list").await?;
+    s2.expect_nothing().await?;
+
+    // The first player should receive the joining message
+
+    s1.expect(":tester2 JOIN #test").await?;
+    s1.expect_nothing().await?;
+
+    // Also send a message for good measure
+
+    s2.send("PRIVMSG #test :Hello").await?;
+    s1.expect(":tester2 PRIVMSG #test :Hello").await?;
+    s1.expect_nothing().await?;
+
+    // Wrap up
+
+    s1.send("QUIT :Leaving").await?;
+    s1.expect(":testserver ERROR :Leaving the server").await?;
+    s1.expect_eof().await?;
+
+    s2.send("QUIT :Leaving").await?;
+    s2.expect(":testserver ERROR :Leaving the server").await?;
+    s2.expect_eof().await?;
+
+    stream1.shutdown().await?;
+    stream2.shutdown().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_force_join_msg() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream1 = TcpStream::connect(server.server.addr).await?;
+    let mut s1 = TestScope::new(&mut stream1);
+    let mut stream2 = TcpStream::connect(server.server.addr).await?;
+    let mut s2 = TestScope::new(&mut stream2);
+
+    s1.send("PASS password").await?;
+    s1.send("NICK tester").await?;
+    s1.send("USER UserName 0 * :Real Name").await?;
+    s1.expect_server_introduction("tester").await?;
+    s1.expect_nothing().await?;
+
+    s2.send("PASS password").await?;
+    s2.send("NICK tester").await?;
+    s2.send("USER UserName 0 * :Real Name").await?;
+    s2.expect_server_introduction("tester").await?;
+    s2.expect_nothing().await?;
+
+    // We join the channel from the first connection
+    s1.send("JOIN #test").await?;
+    s1.expect(":tester JOIN #test").await?;
+    s1.expect(":testserver 332 tester #test :New room").await?;
+    s1.expect(":testserver 353 tester = #test :tester").await?;
+    s1.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+
+    // And the second connection should receive the JOIN message (forced JOIN)
+    s2.expect(":tester JOIN #test").await?;
+    s2.expect(":testserver 332 tester #test :New room").await?;
+    s2.expect(":testserver 353 tester = #test :tester").await?;
+    s2.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+
+    // We send a message to the channel from the second connection
+    s2.send("PRIVMSG #test :Hello").await?;
+    // We should not receive an acknowledgement from the server
+    s2.expect_nothing().await?;
+    // But we should receive this message from the first connection
+    s1.expect(":tester PRIVMSG #test :Hello").await?;
+
+    s1.send("QUIT :Leaving").await?;
+    s1.expect(":testserver ERROR :Leaving the server").await?;
+    s1.expect_eof().await?;
+
+    // Closing a connection does not kick you from the channel on a different connection
+    s2.expect_nothing().await?;
+
+    s2.send("QUIT :Leaving").await?;
+    s2.expect(":testserver ERROR :Leaving the server").await?;
+    s2.expect_eof().await?;
+
+    stream1.shutdown().await?;
+    stream2.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_two_users() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester1")?).await?;
+    server.core.set_password("tester1", "password").await?;
+    server.core.create_player(&PlayerId::from("tester2")?).await?;
+    server.core.set_password("tester2", "password").await?;
+
+    let mut stream1 = TcpStream::connect(server.server.addr).await?;
+    let mut s1 = TestScope::new(&mut stream1);
+    let mut stream2 = TcpStream::connect(server.server.addr).await?;
+    let mut s2 = TestScope::new(&mut stream2);
+
+    s1.send("PASS password").await?;
+    s1.send("NICK tester1").await?;
+    s1.send("USER UserName 0 * :Real Name").await?;
+    s1.expect_server_introduction("tester1").await?;
+    s1.expect_nothing().await?;
+
+    s2.send("PASS password").await?;
+    s2.send("NICK tester2").await?;
+    s2.send("USER UserName 0 * :Real Name").await?;
+    s2.expect_server_introduction("tester2").await?;
+    s2.expect_nothing().await?;
+
+    // Join the channel from the first user
+    s1.send("JOIN #test").await?;
+    s1.expect(":tester1 JOIN #test").await?;
+    s1.expect(":testserver 332 tester1 #test :New room").await?;
+    s1.expect(":testserver 353 tester1 = #test :tester1").await?;
+    s1.expect(":testserver 366 tester1 #test :End of /NAMES list").await?;
+    // Then join the channel from the second user
+    s2.send("JOIN #test").await?;
+    s2.expect(":tester2 JOIN #test").await?;
+    s2.expect(":testserver 332 tester2 #test :New room").await?;
+    s2.expect_that(|msg| {
+        msg == ":testserver 353 tester2 = #test :tester1 tester2"
+            || msg == ":testserver 353 tester2 = #test :tester2 tester1"
+    })
+    .await?;
+    s2.expect(":testserver 366 tester2 #test :End of /NAMES list").await?;
+    // The first user should receive the JOIN message from the second user
+    s1.expect(":tester2 JOIN #test").await?;
+    s1.expect_nothing().await?;
+    s2.expect_nothing().await?;
+    // Send a message from the second user
+    s2.send("PRIVMSG #test :Hello").await?;
+    // The first user should receive the message
+    s1.expect(":tester2 PRIVMSG #test :Hello").await?;
+    // Leave the channel from the first user
+    s1.send("PART #test").await?;
+    s1.expect(":tester1 PART #test").await?;
+    // The second user should receive the PART message
+    s2.expect(":tester1 PART #test").await?;
+
+    s1.send("WHOIS tester2").await?;
+    s1.expect(":testserver 318 tester1 tester2 :End of /WHOIS list").await?;
+
+    stream1.shutdown().await?;
+    s2.send("WHOIS tester3").await?;
+    s2.expect(":testserver 401 tester2 tester3 :No such nick/channel").await?;
+    s2.expect(":testserver 318 tester2 tester3 :End of /WHOIS list").await?;
+
+    stream2.shutdown().await?;
+
+    server.shutdown().await;
     Ok(())
 }
 
@@ -135,12 +560,12 @@ AUTHENTICATE doc: https://modern.ircdocs.horse/#authenticate-message
 */
 #[tokio::test]
 async fn scenario_cap_full_negotiation() -> Result<()> {
-    let mut server = TestServer::start().await?;
+    let server = TestServer::start().await?;
 
     // test scenario
 
-    server.storage.create_user("tester").await?;
+    server.core.create_player(&PlayerId::from("tester")?).await?;
-    server.storage.set_password("tester", "password").await?;
+    server.core.set_password("tester", "password").await?;
 
     let mut stream = TcpStream::connect(server.server.addr).await?;
     let mut s = TestScope::new(&mut stream);
@@ -148,7 +573,7 @@ async fn scenario_cap_full_negotiation() -> Result<()> {
     s.send("CAP LS 302").await?;
     s.send("NICK tester").await?;
     s.send("USER UserName 0 * :Real Name").await?;
-    s.expect(":testserver CAP * LS :sasl=PLAIN").await?;
+    s.expect_cap_ls().await?;
     s.send("CAP REQ :sasl").await?;
     s.expect(":testserver CAP tester ACK :sasl").await?;
     s.send("AUTHENTICATE PLAIN").await?;
@@ -159,11 +584,7 @@ async fn scenario_cap_full_negotiation() -> Result<()> {
 
     s.send("CAP END").await?;
 
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect_server_introduction("tester").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
-    s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
     s.expect(":testserver ERROR :Leaving the server").await?;
@@ -173,18 +594,57 @@ async fn scenario_cap_full_negotiation() -> Result<()> {
 
     // wrap up
 
-    server.server.terminate().await?;
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_cap_full_negotiation_nick_last() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    s.send("CAP LS 302").await?;
+    s.expect_cap_ls().await?;
+    s.send("CAP REQ :sasl").await?;
+    s.expect(":testserver CAP * ACK :sasl").await?;
+    s.send("AUTHENTICATE PLAIN").await?;
+    s.expect(":testserver AUTHENTICATE +").await?;
+    s.send("AUTHENTICATE dGVzdGVyAHRlc3RlcgBwYXNzd29yZA==").await?; // base64-encoded 'tester\x00tester\x00password'
+    s.expect(":testserver 900 tester tester tester :You are now logged in as tester").await?;
+    s.expect(":testserver 903 tester :SASL authentication successful").await?;
+    s.send("CAP END").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.send("NICK tester").await?;
+
+    s.expect_server_introduction("tester").await?;
+    s.expect_nothing().await?;
+    s.send("QUIT :Leaving").await?;
+    s.expect(":testserver ERROR :Leaving the server").await?;
+    s.expect_eof().await?;
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await;
     Ok(())
 }
 
 #[tokio::test]
 async fn scenario_cap_short_negotiation() -> Result<()> {
-    let mut server = TestServer::start().await?;
+    let server = TestServer::start().await?;
 
     // test scenario
 
-    server.storage.create_user("tester").await?;
+    server.core.create_player(&PlayerId::from("tester")?).await?;
-    server.storage.set_password("tester", "password").await?;
+    server.core.set_password("tester", "password").await?;
 
     let mut stream = TcpStream::connect(server.server.addr).await?;
     let mut s = TestScope::new(&mut stream);
@@ -201,11 +661,7 @@ async fn scenario_cap_short_negotiation() -> Result<()> {
 
     s.send("CAP END").await?;
 
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect_server_introduction("tester").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
-    s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
     s.expect(":testserver ERROR :Leaving the server").await?;
@@ -215,18 +671,18 @@ async fn scenario_cap_short_negotiation() -> Result<()> {
 
     // wrap up
 
-    server.server.terminate().await?;
+    server.shutdown().await;
     Ok(())
 }
 
 #[tokio::test]
 async fn scenario_cap_sasl_fail() -> Result<()> {
-    let mut server = TestServer::start().await?;
+    let server = TestServer::start().await?;
 
     // test scenario
 
-    server.storage.create_user("tester").await?;
+    server.core.create_player(&PlayerId::from("tester")?).await?;
-    server.storage.set_password("tester", "password").await?;
+    server.core.set_password("tester", "password").await?;
 
     let mut stream = TcpStream::connect(server.server.addr).await?;
     let mut s = TestScope::new(&mut stream);
@@ -234,7 +690,7 @@ async fn scenario_cap_sasl_fail() -> Result<()> {
     s.send("CAP LS 302").await?;
     s.send("NICK tester").await?;
     s.send("USER UserName 0 * :Real Name").await?;
-    s.expect(":testserver CAP * LS :sasl=PLAIN").await?;
+    s.expect_cap_ls().await?;
     s.send("CAP REQ :sasl").await?;
     s.expect(":testserver CAP tester ACK :sasl").await?;
     s.send("AUTHENTICATE SHA256").await?;
@@ -249,11 +705,7 @@ async fn scenario_cap_sasl_fail() -> Result<()> {
 
     s.send("CAP END").await?;
 
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect_server_introduction("tester").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
-    s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
     s.expect(":testserver ERROR :Leaving the server").await?;
@@ -263,6 +715,167 @@ async fn scenario_cap_sasl_fail() -> Result<()> {
 
     // wrap up
 
-    server.server.terminate().await?;
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn terminate_socket_scenario() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    s.send("NICK tester").await?;
+    s.send("CAP REQ :sasl").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.expect(":testserver CAP tester ACK :sasl").await?;
+    s.send("AUTHENTICATE PLAIN").await?;
+    s.expect(":testserver AUTHENTICATE +").await?;
+
+    server.shutdown().await;
+    assert_eq!(stream.read_u8().await.unwrap_err().kind(), ErrorKind::UnexpectedEof);
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn server_time_capability() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+
+    s.send("CAP LS 302").await?;
+    s.send("NICK tester").await?;
+    s.send("USER UserName 0 * :Real Name").await?;
+    s.expect_cap_ls().await?;
+    s.send("CAP REQ :sasl server-time").await?;
+    s.expect(":testserver CAP tester ACK :sasl server-time").await?;
+    s.send("AUTHENTICATE PLAIN").await?;
+    s.expect(":testserver AUTHENTICATE +").await?;
+    s.send("AUTHENTICATE dGVzdGVyAHRlc3RlcgBwYXNzd29yZA==").await?; // base64-encoded 'tester\x00tester\x00password'
+    s.expect(":testserver 900 tester tester tester :You are now logged in as tester").await?;
+    s.expect(":testserver 903 tester :SASL authentication successful").await?;
+    s.send("CAP END").await?;
+    s.expect_server_introduction("tester").await?;
+    s.expect_nothing().await?;
+    s.send("JOIN #test").await?;
+    s.expect(":tester JOIN #test").await?;
+    s.expect(":testserver 332 tester #test :New room").await?;
+    s.expect(":testserver 353 tester = #test :tester").await?;
+    s.expect(":testserver 366 tester #test :End of /NAMES list").await?;
+
+    server.core.create_player(&PlayerId::from("some_guy")?).await?;
+    let mut conn = match server.core.connect_to_player(&PlayerId::from("some_guy")?).await? {
+        PlayerConnectionResult::Success(conn) => conn,
+        PlayerConnectionResult::PlayerNotFound => panic!("user was created, but not returned"),
+    };
+    let res = conn.join_room(RoomId::try_from("test")?).await?;
+    let JoinResult::Success(_) = res else {
+        panic!("Failed to join room");
+    };
+
+    s.expect(":some_guy JOIN #test").await?;
+
+    let SendMessageResult::Success(res) = conn.send_message(RoomId::try_from("test")?, "Hello".into()).await? else {
+        panic!("Failed to send message");
+    };
+    s.expect(&format!(
+        "@time={} :some_guy PRIVMSG #test :Hello",
+        res.to_rfc3339_opts(SecondsFormat::Millis, true)
+    ))
+    .await?;
+
+    // formatting check
+    assert_eq!(
+        DateTime::parse_from_rfc3339(&"2024-01-01T10:00:32.123Z")?.to_rfc3339_opts(SecondsFormat::Millis, true),
+        "2024-01-01T10:00:32.123Z"
+    );
+
+    s.send("QUIT :Leaving").await?;
+    s.expect(":testserver ERROR :Leaving the server").await?;
+    s.expect_eof().await?;
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_two_players_dialog() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester1")?).await?;
+    server.core.set_password("tester1", "password").await?;
+    server.core.create_player(&PlayerId::from("tester2")?).await?;
+    server.core.set_password("tester2", "password").await?;
+
+    let mut stream1 = TcpStream::connect(server.server.addr).await?;
+    let mut s1 = TestScope::new(&mut stream1);
+
+    let mut stream2 = TcpStream::connect(server.server.addr).await?;
+    let mut s2 = TestScope::new(&mut stream2);
+
+    s1.send("CAP LS 302").await?;
+    s1.send("NICK tester1").await?;
+    s1.send("USER UserName 0 * :Real Name").await?;
+    s1.expect_cap_ls().await?;
+    s1.send("CAP REQ :sasl").await?;
+    s1.expect(":testserver CAP tester1 ACK :sasl").await?;
+    s1.send("AUTHENTICATE PLAIN").await?;
+    s1.expect(":testserver AUTHENTICATE +").await?;
+    s1.send("AUTHENTICATE dGVzdGVyMQB0ZXN0ZXIxAHBhc3N3b3Jk").await?; // base64-encoded 'tester1\x00tester1\x00password'
+    s1.expect(":testserver 900 tester1 tester1 tester1 :You are now logged in as tester1").await?;
+    s1.expect(":testserver 903 tester1 :SASL authentication successful").await?;
+    s1.send("CAP END").await?;
+    s1.expect_server_introduction("tester1").await?;
+    s1.expect_nothing().await?;
+
+    s2.send("CAP LS 302").await?;
+    s2.send("NICK tester2").await?;
+    s2.send("USER UserName 0 * :Real Name").await?;
+    s2.expect_cap_ls().await?;
+    s2.send("CAP REQ :sasl").await?;
+    s2.expect(":testserver CAP tester2 ACK :sasl").await?;
+    s2.send("AUTHENTICATE PLAIN").await?;
+    s2.expect(":testserver AUTHENTICATE +").await?;
+    s2.send("AUTHENTICATE dGVzdGVyMgB0ZXN0ZXIyAHBhc3N3b3Jk").await?; // base64-encoded 'tester2\x00tester2\x00password'
+    s2.expect(":testserver 900 tester2 tester2 tester2 :You are now logged in as tester2").await?;
+    s2.expect(":testserver 903 tester2 :SASL authentication successful").await?;
+    s2.send("CAP END").await?;
+    s2.expect_server_introduction("tester2").await?;
+    s2.expect_nothing().await?;
+
+    s1.send("PRIVMSG tester2 :Henlo! How are you?").await?;
+    s1.expect_nothing().await?;
+    s2.expect(":tester1 PRIVMSG tester2 :Henlo! How are you?").await?;
+    s2.expect_nothing().await?;
+
+    s2.send("PRIVMSG tester1 good").await?;
+    s2.expect_nothing().await?;
+    s1.expect(":tester2 PRIVMSG tester1 :good").await?;
+    s1.expect_nothing().await?;
+
+    stream1.shutdown().await?;
+    stream2.shutdown().await?;
+
+    server.shutdown().await;
+
     Ok(())
 }

crates/projection-xmpp/rustfmt.toml

@@ -1,2 +0,0 @@
-max_width = 120
-chain_width = 120

crates/projection-xmpp/src/iq.rs

@@ -2,32 +2,30 @@
 
 use quick_xml::events::Event;
 
-use lavina_core::room::RoomRegistry;
+use lavina_core::room::RoomId;
-use proto_xmpp::bind::{BindResponse, Jid, Name, Resource, Server};
+use lavina_core::LavinaCore;
-use proto_xmpp::client::{Iq, IqType};
+use proto_xmpp::bind::{BindRequest, BindResponse, Jid, Name, Server};
+use proto_xmpp::client::{Iq, IqError, IqErrorCondition, IqErrorType, IqType};
 use proto_xmpp::disco::{Feature, Identity, InfoQuery, Item, ItemQuery};
+use proto_xmpp::mam::{Fin, Set};
 use proto_xmpp::roster::RosterQuery;
 use proto_xmpp::session::Session;
+use proto_xmpp::xml::ToXml;
 
 use crate::proto::IqClientBody;
 use crate::XmppConnection;
 
-use proto_xmpp::xml::ToXml;
-
 impl<'a> XmppConnection<'a> {
+    #[tracing::instrument(skip(self, output, iq), name = "XmppConnection::handle_iq")]
     pub async fn handle_iq(&self, output: &mut Vec<Event<'static>>, iq: Iq<IqClientBody>) {
         match iq.body {
-            IqClientBody::Bind(b) => {
+            IqClientBody::Bind(req) => {
                 let req = Iq {
                     from: None,
                     id: iq.id,
                     to: None,
                     r#type: IqType::Result,
-                    body: BindResponse(Jid {
+                    body: self.bind(&req).await,
-                        name: Some(Name("darova".into())),
-                        server: Server("localhost".into()),
-                        resource: Some(Resource("kek".into())),
-                    }),
                 };
                 req.serialize(output);
             }
@@ -52,7 +50,32 @@ impl<'a> XmppConnection<'a> {
                 req.serialize(output);
             }
             IqClientBody::DiscoInfo(info) => {
-                let response = disco_info(iq.to.as_deref(), &info);
+                let response = self.disco_info(iq.to.as_ref(), &info).await;
+                match response {
+                    Ok(response) => {
+                        let req = Iq {
+                            from: iq.to,
+                            id: iq.id,
+                            to: None,
+                            r#type: IqType::Result,
+                            body: response,
+                        };
+                        req.serialize(output);
+                    }
+                    Err(response) => {
+                        let req = Iq {
+                            from: iq.to,
+                            id: iq.id,
+                            to: None,
+                            r#type: IqType::Error,
+                            body: response,
+                        };
+                        req.serialize(output);
+                    }
+                }
+            }
+            IqClientBody::DiscoItem(item) => {
+                let response = self.disco_items(iq.to.as_ref(), &item, self.core).await;
                 let req = Iq {
                     from: iq.to,
                     id: iq.id,
@@ -62,16 +85,17 @@ impl<'a> XmppConnection<'a> {
                 };
                 req.serialize(output);
             }
-            IqClientBody::DiscoItem(item) => {
+            IqClientBody::MessageArchiveRequest(_) => {
-                let response = disco_items(iq.to.as_deref(), &item, self.rooms).await;
+                let response = Iq {
-                let req = Iq {
                     from: iq.to,
                     id: iq.id,
                     to: None,
                     r#type: IqType::Result,
-                    body: response,
+                    body: Fin {
+                        set: Set { count: Some(0) },
+                    },
                 };
-                req.serialize(output);
+                response.serialize(output);
             }
             _ => {
                 let req = Iq {
@@ -79,84 +103,144 @@ impl<'a> XmppConnection<'a> {
                     id: iq.id,
                     to: None,
                     r#type: IqType::Error,
-                    body: (),
+                    body: IqError {
+                        r#type: IqErrorType::Cancel,
+                        condition: None,
+                    },
                 };
                 req.serialize(output);
             }
         }
     }
-}
 
-fn disco_info(to: Option<&str>, req: &InfoQuery) -> InfoQuery {
+    #[tracing::instrument(skip(self), name = "XmppConnection::bind")]
-    let identity;
+    pub(crate) async fn bind(&self, req: &BindRequest) -> BindResponse {
-    let feature;
+        BindResponse(Jid {
-    match to {
+            name: Some(self.user.xmpp_name.clone()),
-        Some("localhost") => {
+            server: Server(self.hostname.clone()),
-            identity = vec![Identity {
+            resource: Some(self.user.xmpp_resource.clone()),
-                category: "server".into(),
+        })
-                name: None,
-                r#type: "im".into(),
-            }];
-            feature = vec![
-                Feature::new("http://jabber.org/protocol/disco#info"),
-                Feature::new("http://jabber.org/protocol/disco#items"),
-                Feature::new("iq"),
-                Feature::new("presence"),
-            ]
-        }
-        Some("rooms.localhost") => {
-            identity = vec![Identity {
-                category: "conference".into(),
-                name: Some("Chat rooms".into()),
-                r#type: "text".into(),
-            }];
-            feature = vec![
-                Feature::new("http://jabber.org/protocol/disco#info"),
-                Feature::new("http://jabber.org/protocol/disco#items"),
-                Feature::new("http://jabber.org/protocol/muc"),
-            ]
-        }
-        _ => {
-            identity = vec![];
-            feature = vec![];
-        }
-    };
-    InfoQuery {
-        node: None,
-        identity,
-        feature,
     }
-}
 
-async fn disco_items(to: Option<&str>, req: &ItemQuery, rooms: &RoomRegistry) -> ItemQuery {
+    #[tracing::instrument(skip(self), name = "XmppConnection::disco_info")]
-    let item = match to {
+    async fn disco_info(&self, to: Option<&Jid>, req: &InfoQuery) -> Result<InfoQuery, IqError> {
-        Some("localhost") => {
+        let identity;
-            vec![Item {
+        let feature;
-                jid: Jid {
+
-                    name: None,
+        match to {
-                    server: Server("rooms.localhost".into()),
+            Some(Jid {
-                    resource: None,
-                },
                 name: None,
-                node: None,
+                server,
-            }]
+                resource: None,
-        }
+            }) if server.0 == self.hostname => {
-        Some("rooms.localhost") => {
+                identity = vec![Identity {
-            let room_list = rooms.get_all_rooms().await;
+                    category: "server".into(),
-            room_list
+                    name: None,
-                .into_iter()
+                    r#type: "im".into(),
-                .map(|room_info| Item {
+                }];
+                feature = vec![
+                    Feature::new("http://jabber.org/protocol/disco#info"),
+                    Feature::new("http://jabber.org/protocol/disco#items"),
+                    Feature::new("iq"),
+                    Feature::new("presence"),
+                ]
+            }
+            Some(Jid {
+                name: None,
+                server,
+                resource: None,
+            }) if server.0 == self.hostname_rooms => {
+                identity = vec![Identity {
+                    category: "conference".into(),
+                    name: Some("Chat rooms".into()),
+                    r#type: "text".into(),
+                }];
+                feature = vec![
+                    Feature::new("http://jabber.org/protocol/disco#info"),
+                    Feature::new("http://jabber.org/protocol/disco#items"),
+                    Feature::new("http://jabber.org/protocol/muc"),
+                ]
+            }
+            Some(Jid {
+                name: Some(room_name),
+                server,
+                resource: None,
+            }) if server.0 == self.hostname_rooms => {
+                let room_id = RoomId::try_from(room_name.0.clone()).unwrap();
+                let Some(_) = self.core.get_room(&room_id).await.unwrap() else {
+                    // TODO should return item-not-found
+                    // example:
+                    // <error type="cancel">
+                    // <item-not-found xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/>
+                    // <text xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" xml:lang="en">Conference room does not exist</text>
+                    // </error>
+                    return Err(IqError {
+                        r#type: IqErrorType::Cancel,
+                        condition: Some(IqErrorCondition::ItemNotFound),
+                    });
+                };
+                identity = vec![Identity {
+                    category: "conference".into(),
+                    name: Some(room_id.into_inner().to_string()),
+                    r#type: "text".into(),
+                }];
+                feature = vec![
+                    Feature::new("http://jabber.org/protocol/disco#info"),
+                    Feature::new("http://jabber.org/protocol/disco#items"),
+                    Feature::new("http://jabber.org/protocol/muc"),
+                ]
+            }
+            _ => {
+                identity = vec![];
+                feature = vec![];
+            }
+        };
+        Ok(InfoQuery {
+            node: None,
+            identity,
+            feature,
+        })
+    }
+
+    #[tracing::instrument(skip(self, core), name = "XmppConnection::disco_items")]
+    async fn disco_items(&self, to: Option<&Jid>, req: &ItemQuery, core: &LavinaCore) -> ItemQuery {
+        let item = match to {
+            Some(Jid {
+                name: None,
+                server,
+                resource: None,
+            }) if server.0 == self.hostname => {
+                vec![Item {
                     jid: Jid {
-                        name: Some(Name(room_info.id.into_inner())),
+                        name: None,
-                        server: Server("rooms.localhost".into()),
+                        server: Server(self.hostname_rooms.clone()),
                         resource: None,
                     },
                     name: None,
                     node: None,
-                })
+                }]
-                .collect()
+            }
-        }
+            Some(Jid {
-        _ => vec![],
+                name: None,
-    };
+                server,
-    ItemQuery { item }
+                resource: None,
+            }) if server.0 == self.hostname_rooms => {
+                let room_list = core.get_all_rooms().await;
+                room_list
+                    .into_iter()
+                    .map(|room_info| Item {
+                        jid: Jid {
+                            name: Some(Name(room_info.id.into_inner())),
+                            server: Server(self.hostname_rooms.clone()),
+                            resource: None,
+                        },
+                        name: None,
+                        node: None,
+                    })
+                    .collect()
+            }
+            _ => vec![],
+        };
+        ItemQuery { item }
+    }
 }

crates/projection-xmpp/src/lib.rs

@@ -22,13 +22,14 @@ use tokio::sync::mpsc::channel;
 use tokio_rustls::rustls::{Certificate, PrivateKey};
 use tokio_rustls::TlsAcceptor;
 
-use lavina_core::player::{PlayerConnection, PlayerId, PlayerRegistry};
+use lavina_core::auth::Verdict;
+use lavina_core::player::{ConnectionMessage, PlayerConnection, PlayerConnectionResult, PlayerId, StopReason};
 use lavina_core::prelude::*;
-use lavina_core::repo::Storage;
-use lavina_core::room::RoomRegistry;
 use lavina_core::terminator::Terminator;
+use lavina_core::LavinaCore;
 use proto_xmpp::bind::{Name, Resource};
 use proto_xmpp::stream::*;
+use proto_xmpp::streamerror::{StreamError, StreamErrorKind};
 use proto_xmpp::xml::{Continuation, FromXml, Parser, ToXml};
 use sasl::AuthBody;
 
@@ -39,11 +40,15 @@ mod message;
 mod presence;
 mod updates;
 
+#[cfg(test)]
+mod testkit;
+
 #[derive(Deserialize, Debug, Clone)]
 pub struct ServerConfig {
     pub listen_on: SocketAddr,
     pub cert: PathBuf,
     pub key: PathBuf,
+    pub hostname: Str,
 }
 
 struct LoadedConfig {
@@ -52,9 +57,17 @@ struct LoadedConfig {
 }
 
 struct Authenticated {
+    /// Identifier of the authenticated player.
+    ///
+    /// Used when communicating with lavina-core on behalf of the player.
     player_id: PlayerId,
+    /// The user's XMPP name.
+    ///
+    /// Used in `to` and `from` fields of XMPP messages.
     xmpp_name: Name,
+    /// The resource given to this user by the server.
     xmpp_resource: Resource,
+    /// The resource used by this user when joining MUCs.
     xmpp_muc_name: Resource,
 }
 
@@ -69,13 +82,7 @@ impl RunningServer {
     }
 }
 
-pub async fn launch(
+pub async fn launch(config: ServerConfig, core: LavinaCore, metrics: MetricsRegistry) -> Result<RunningServer> {
-    config: ServerConfig,
-    players: PlayerRegistry,
-    rooms: RoomRegistry,
-    metrics: MetricsRegistry,
-    storage: Storage,
-) -> Result<RunningServer> {
     log::info!("Starting XMPP projection");
 
     let certs = certs(&mut SyncBufReader::new(File::open(config.cert)?))?;
@@ -114,14 +121,13 @@ pub async fn launch(
                                 // TODO kill the older connection and restart it
                                 continue;
                             }
-                            let players = players.clone();
+                            let core = core.clone();
-                            let rooms = rooms.clone();
+                            let hostname = config.hostname.clone();
-                            let storage = storage.clone();
                             let terminator = Terminator::spawn(|termination| {
                                 let stopped_tx = stopped_tx.clone();
                                 let loaded_config = loaded_config.clone();
                                 async move {
-                                    match handle_socket(loaded_config, stream, &socket_addr, players, rooms, storage, termination).await {
+                                    match handle_socket(loaded_config, stream, &socket_addr, core, hostname, termination).await {
                                         Ok(_) => log::info!("Connection terminated"),
                                         Err(err) => log::warn!("Connection failed: {err}"),
                                     }
@@ -156,12 +162,11 @@ pub async fn launch(
 }
 
 async fn handle_socket(
-    config: Arc<LoadedConfig>,
+    cert_config: Arc<LoadedConfig>,
     mut stream: TcpStream,
     socket_addr: &SocketAddr,
-    mut players: PlayerRegistry,
+    core: LavinaCore,
-    rooms: RoomRegistry,
+    hostname: Str,
-    mut storage: Storage,
     termination: Deferred<()>, // TODO use it to stop the connection gracefully
 ) -> Result<()> {
     log::info!("Received an XMPP connection from {socket_addr}");
@@ -170,12 +175,12 @@ async fn handle_socket(
     let mut buf_reader = BufReader::new(reader);
     let mut buf_writer = BufWriter::new(writer);
 
-    socket_force_tls(&mut buf_reader, &mut buf_writer, &mut reader_buf).await?;
+    socket_force_tls(&mut buf_reader, &mut buf_writer, &mut reader_buf, &hostname).await?;
 
     let mut config = tokio_rustls::rustls::ServerConfig::builder()
         .with_safe_defaults()
         .with_no_client_auth()
-        .with_single_cert(vec![config.cert.clone()], config.key.clone())?;
+        .with_single_cert(vec![cert_config.cert.clone()], cert_config.key.clone())?;
     config.key_log = Arc::new(tokio_rustls::rustls::KeyLogFile::new());
 
     log::debug!("Accepting TLS connection...");
@@ -185,23 +190,45 @@ async fn handle_socket(
 
     let (a, b) = tokio::io::split(new_stream);
     let mut xml_reader = NsReader::from_reader(BufReader::new(a));
-    let mut xml_writer = Writer::new(b);
+    let mut xml_writer = Writer::new(BufWriter::new(b));
 
-    let authenticated = socket_auth(&mut xml_reader, &mut xml_writer, &mut reader_buf, &mut storage).await?;
+    pin!(termination);
-    log::debug!("User authenticated");
+    select! {
-    let mut connection = players.connect_to_player(authenticated.player_id.clone()).await;
+        biased;
-    socket_final(
+        _ = &mut termination => {
-        &mut xml_reader,
+            log::info!("Socket handling was terminated");
-        &mut xml_writer,
+            return Ok(())
-        &mut reader_buf,
+        },
-        &authenticated,
+        authenticated = socket_auth(&mut xml_reader, &mut xml_writer, &mut reader_buf, &core, &hostname) => {
-        &mut connection,
+            match authenticated {
-        &rooms,
+                Ok(authenticated) => {
-    )
+                    let mut connection = match core.connect_to_player(&authenticated.player_id).await? {
-    .await?;
+                        PlayerConnectionResult::Success(connection) => connection,
+                        PlayerConnectionResult::PlayerNotFound => {
+                            tracing::error!("Authorized user unexpectedly not found in the database");
+                            return Err(anyhow!("no such user"));
+                        }
+                    };
+                    socket_final(
+                        &mut xml_reader,
+                        &mut xml_writer,
+                        &mut reader_buf,
+                        &authenticated,
+                        &mut connection,
+                        &core,
+                        &hostname,
+                    )
+                    .await?;
+                },
+                Err(err) => {
+                    log::error!("Authentication error: {:?}", err);
+                }
+            }
+        },
+    }
 
     let a = xml_reader.into_inner().into_inner();
-    let b = xml_writer.into_inner();
+    let b = xml_writer.into_inner().into_inner();
     a.unsplit(b).shutdown().await?;
     Ok(())
 }
@@ -210,17 +237,18 @@ async fn socket_force_tls(
     reader: &mut (impl AsyncBufRead + Unpin),
     writer: &mut (impl AsyncWrite + Unpin),
     reader_buf: &mut Vec<u8>,
+    hostname: &Str,
 ) -> Result<()> {
     use proto_xmpp::tls::*;
     let xml_reader = &mut NsReader::from_reader(reader);
     let xml_writer = &mut Writer::new(writer);
-    read_xml_header(xml_reader, reader_buf).await?;
+    // TODO validate the server hostname received in the stream start
     let _ = ClientStreamStart::parse(xml_reader, reader_buf).await?;
 
     let event = Event::Decl(BytesDecl::new("1.0", None, None));
     xml_writer.write_event_async(event).await?;
     let msg = ServerStreamStart {
-        from: "localhost".into(),
+        from: hostname.to_string(),
         lang: "en".into(),
         id: uuid::Uuid::new_v4().to_string(),
         version: "1.0".into(),
@@ -244,14 +272,15 @@ async fn socket_auth(
     xml_reader: &mut NsReader<(impl AsyncBufRead + Unpin)>,
     xml_writer: &mut Writer<(impl AsyncWrite + Unpin)>,
     reader_buf: &mut Vec<u8>,
-    storage: &mut Storage,
+    core: &LavinaCore,
+    hostname: &Str,
 ) -> Result<Authenticated> {
-    read_xml_header(xml_reader, reader_buf).await?;
+    // TODO validate the server hostname received in the stream start
     let _ = ClientStreamStart::parse(xml_reader, reader_buf).await?;
 
     xml_writer.write_event_async(Event::Decl(BytesDecl::new("1.0", None, None))).await?;
     ServerStreamStart {
-        from: "localhost".into(),
+        from: hostname.to_string(),
         lang: "en".into(),
         id: uuid::Uuid::new_v4().to_string(),
         version: "1.0".into(),
@@ -268,36 +297,28 @@ async fn socket_auth(
     xml_writer.get_mut().flush().await?;
 
     let auth: proto_xmpp::sasl::Auth = proto_xmpp::sasl::Auth::parse(xml_reader, reader_buf).await?;
-    proto_xmpp::sasl::Success.write_xml(xml_writer).await?;
 
     match AuthBody::from_str(&auth.body) {
         Ok(logopass) => {
             let name = &logopass.login;
-            let stored_user = storage.retrieve_user_by_name(name).await?;
+            let verdict = core.authenticate(name, &logopass.password).await?;
-
+            match verdict {
-            let stored_user = match stored_user {
+                Verdict::Authenticated => {
-                Some(u) => u,
+                    proto_xmpp::sasl::Success.write_xml(xml_writer).await?;
-                None => {
+                    xml_writer.get_mut().flush().await?;
-                    log::info!("User '{}' not found", name);
+                }
-                    return Err(fail("no user found"));
+                Verdict::UserNotFound | Verdict::InvalidPassword => {
+                    proto_xmpp::sasl::Failure.write_xml(xml_writer).await?;
+                    xml_writer.get_mut().flush().await?;
+                    return Err(anyhow!("incorrect credentials"));
                 }
-            };
-            // TODO return proper XML errors to the client
-
-            if stored_user.password.is_none() {
-                log::info!("Password not defined for user '{}'", name);
-                return Err(fail("password is not defined"));
             }
-            if stored_user.password.as_deref() != Some(&logopass.password) {
+            let name: Str = name.as_str().into();
-                log::info!("Incorrect password supplied for user '{}'", name);
-                return Err(fail("passwords do not match"));
-            }
-
             Ok(Authenticated {
-                player_id: PlayerId::from(name.as_str())?,
+                player_id: PlayerId::from(name.clone())?,
-                xmpp_name: Name(name.to_string().into()),
+                xmpp_name: Name(name.clone()),
-                xmpp_resource: Resource(name.to_string().into()),
+                xmpp_resource: Resource(name.clone()),
-                xmpp_muc_name: Resource(name.to_string().into()),
+                xmpp_muc_name: Resource(name.clone()),
             })
         }
         Err(e) => return Err(e),
@@ -310,14 +331,15 @@ async fn socket_final(
     reader_buf: &mut Vec<u8>,
     authenticated: &Authenticated,
     user_handle: &mut PlayerConnection,
-    rooms: &RoomRegistry,
+    core: &LavinaCore,
+    hostname: &Str,
 ) -> Result<()> {
-    read_xml_header(xml_reader, reader_buf).await?;
+    // TODO validate the server hostname received in the stream start
     let _ = ClientStreamStart::parse(xml_reader, reader_buf).await?;
 
     xml_writer.write_event_async(Event::Decl(BytesDecl::new("1.0", None, None))).await?;
     ServerStreamStart {
-        from: "localhost".into(),
+        from: hostname.to_string(),
         lang: "en".into(),
         id: uuid::Uuid::new_v4().to_string(),
         version: "1.0".into(),
@@ -342,14 +364,16 @@ async fn socket_final(
         let mut conn = XmppConnection {
             user: authenticated,
             user_handle,
-            rooms,
+            core,
+            hostname: hostname.clone(),
+            hostname_rooms: format!("rooms.{}", hostname).into(),
         };
         let should_recreate_xml_future = select! {
             biased;
             res = &mut next_xml_event => 's: {
                 let (ns, event) = res?;
                 if let Event::Text(ref e) = event {
-                    if e.iter().all(|x| *x == 0xA) {
+                    if e.iter().all(|x| *x == b'\n' || *x == b' ') {
                         break 's true;
                     }
                 }
@@ -372,16 +396,41 @@ async fn socket_final(
                 true
             },
             update = conn.user_handle.receiver.recv() => {
-                if let Some(update) = update {
+                match update {
-                    conn.handle_update(&mut events, update).await?;
+                    Some(ConnectionMessage::Update(update)) => {
-                    for i in &events {
+                        conn.handle_update(&mut events, update).await?;
-                        xml_writer.write_event_async(i).await?;
+                        for i in &events {
+                            xml_writer.write_event_async(i).await?;
+                        }
+                        events.clear();
+                        xml_writer.get_mut().flush().await?;
+                    }
+                    Some(ConnectionMessage::Stop(reason)) => {
+                        tracing::debug!("Connection is being terminated: {reason:?}");
+                        let kind = match reason {
+                            StopReason::ServerShutdown => StreamErrorKind::SystemShutdown,
+                            StopReason::InternalError => StreamErrorKind::InternalServerError,
+                        };
+                        StreamError { kind }.serialize(&mut events);
+                        ServerStreamEnd.serialize(&mut events);
+                        for i in &events {
+                            xml_writer.write_event_async(i).await?;
+                        }
+                        events.clear();
+                        xml_writer.get_mut().flush().await?;
+                        break;
+                    }
+                    None => {
+                        log::error!("Player is terminated, must terminate the connection");
+                        StreamError { kind: StreamErrorKind::SystemShutdown }.serialize(&mut events);
+                        ServerStreamEnd.serialize(&mut events);
+                        for i in &events {
+                            xml_writer.write_event_async(i).await?;
+                        }
+                        events.clear();
+                        xml_writer.get_mut().flush().await?;
+                        break;
                     }
-                    events.clear();
-                    xml_writer.get_mut().flush().await?;
-                } else {
-                    log::warn!("Player is terminated, must terminate the connection");
-                    break;
                 }
                 false
             }
@@ -398,13 +447,16 @@ async fn socket_final(
 struct XmppConnection<'a> {
     user: &'a Authenticated,
     user_handle: &'a mut PlayerConnection,
-    rooms: &'a RoomRegistry,
+    core: &'a LavinaCore,
+    hostname: Str,
+    hostname_rooms: Str,
 }
 
 impl<'a> XmppConnection<'a> {
+    #[tracing::instrument(skip(self, output, packet), name = "XmppConnection::handle_packet")]
     async fn handle_packet(&mut self, output: &mut Vec<Event<'static>>, packet: ClientPacket) -> Result<bool> {
         let res = match packet {
-            proto::ClientPacket::Iq(iq) => {
+            ClientPacket::Iq(iq) => {
                 self.handle_iq(output, iq).await;
                 false
             }
@@ -412,37 +464,16 @@ impl<'a> XmppConnection<'a> {
                 self.handle_message(output, m).await?;
                 false
             }
-            proto::ClientPacket::Presence(p) => {
+            ClientPacket::Presence(p) => {
                 self.handle_presence(output, p).await?;
                 false
             }
-            proto::ClientPacket::StreamEnd => {
+            ClientPacket::StreamEnd => {
                 ServerStreamEnd.serialize(output);
                 true
             }
+            ClientPacket::Eos => true,
         };
         Ok(res)
     }
 }
-
-async fn read_xml_header(
-    xml_reader: &mut NsReader<(impl AsyncBufRead + Unpin)>,
-    reader_buf: &mut Vec<u8>,
-) -> Result<()> {
-    if let Event::Decl(bytes) = xml_reader.read_event_into_async(reader_buf).await? {
-        // this is <?xml ...> header
-        if let Some(encoding) = bytes.encoding() {
-            let encoding = encoding?;
-            if &*encoding == b"UTF-8" {
-                Ok(())
-            } else {
-                Err(anyhow!("Unsupported encoding: {encoding:?}"))
-            }
-        } else {
-            // Err(fail("No XML encoding provided"))
-            Ok(())
-        }
-    } else {
-        Err(anyhow!("Expected XML header"))
-    }
-}

crates/projection-xmpp/src/message.rs

@@ -1,5 +1,6 @@
 //! Handling of all client2server message stanzas
 
+use lavina_core::player::PlayerId;
 use quick_xml::events::Event;
 
 use lavina_core::prelude::*;
@@ -11,6 +12,7 @@ use proto_xmpp::xml::{Ignore, ToXml};
 use crate::XmppConnection;
 
 impl<'a> XmppConnection<'a> {
+    #[tracing::instrument(skip(self, output, m), name = "XmppConnection::message")]
     pub async fn handle_message(&mut self, output: &mut Vec<Event<'static>>, m: Message<Ignore>) -> Result<()> {
         if let Some(Jid {
             name: Some(name),
@@ -18,17 +20,18 @@ impl<'a> XmppConnection<'a> {
             resource: _,
         }) = m.to
         {
-            if server.0.as_ref() == "rooms.localhost" && m.r#type == MessageType::Groupchat {
+            if server.0.as_ref() == &*self.hostname_rooms && m.r#type == MessageType::Groupchat {
-                self.user_handle.send_message(RoomId::from(name.0.clone())?, m.body.clone().into()).await?;
+                let Some(body) = &m.body else { return Ok(()) };
+                self.user_handle.send_message(RoomId::try_from(name.0.clone())?, body.clone()).await?;
                 Message::<()> {
                     to: Some(Jid {
                         name: Some(self.user.xmpp_name.clone()),
-                        server: Server("localhost".into()),
+                        server: Server(self.hostname.clone()),
                         resource: Some(self.user.xmpp_resource.clone()),
                     }),
                     from: Some(Jid {
                         name: Some(name),
-                        server: Server("rooms.localhost".into()),
+                        server: Server(self.hostname_rooms.clone()),
                         resource: Some(self.user.xmpp_muc_name.clone()),
                     }),
                     id: m.id,
@@ -40,6 +43,10 @@ impl<'a> XmppConnection<'a> {
                 }
                 .serialize(output);
                 Ok(())
+            } else if server.0.as_ref() == &*self.hostname && m.r#type == MessageType::Chat {
+                let Some(body) = &m.body else { return Ok(()) };
+                self.user_handle.send_dialog_message(PlayerId::from(name.0.clone())?, body.clone()).await?;
+                Ok(())
             } else {
                 todo!()
             }

crates/projection-xmpp/src/presence.rs

@@ -1,55 +1,358 @@
 //! Handling of all client2server presence stanzas
 
+use anyhow::Result;
 use quick_xml::events::Event;
 
-use lavina_core::prelude::*;
+use lavina_core::player::RoomHistoryResult;
 use lavina_core::room::RoomId;
-use proto_xmpp::bind::{Jid, Server};
+use proto_xmpp::bind::{Jid, Name, Resource, Server};
-use proto_xmpp::client::Presence;
+use proto_xmpp::client::{Message, MessageType, Presence, Subject};
+use proto_xmpp::muc::{Affiliation, Delay, Role, XUser, XUserItem, XmppHistoryMessage};
 use proto_xmpp::xml::{Ignore, ToXml};
 
 use crate::XmppConnection;
 
 impl<'a> XmppConnection<'a> {
+    #[tracing::instrument(skip(self, output, p), name = "XmppConnection::handle_presence")]
     pub async fn handle_presence(&mut self, output: &mut Vec<Event<'static>>, p: Presence<Ignore>) -> Result<()> {
-        let response = if p.to.is_none() {
+        match p.to {
-            Presence::<()> {
+            None => {
-                to: Some(Jid {
+                self.self_presence(output, p.r#type.as_deref()).await;
-                    name: Some(self.user.xmpp_name.clone()),
-                    server: Server("localhost".into()),
-                    resource: Some(self.user.xmpp_resource.clone()),
-                }),
-                from: Some(Jid {
-                    name: Some(self.user.xmpp_name.clone()),
-                    server: Server("localhost".into()),
-                    resource: Some(self.user.xmpp_resource.clone()),
-                }),
-                ..Default::default()
             }
-        } else if let Some(Jid {
+            Some(Jid {
-            name: Some(name),
+                name: Some(name),
-            server,
+                server,
-            resource: Some(resource),
+                // resources in MUCs are members' personas – not implemented (yet?)
-        }) = p.to
+                resource: Some(_),
-        {
+            }) if server.0 == self.hostname_rooms => match p.r#type.as_deref() {
-            let a = self.user_handle.join_room(RoomId::from(name.0.clone())?).await?;
+                None => {
-            Presence::<()> {
+                    self.join_muc(output, p.id, name).await?;
-                to: Some(Jid {
+                }
-                    name: Some(self.user.xmpp_name.clone()),
+                Some("unavailable") => {
-                    server: Server("localhost".into()),
+                    self.leave_muc(output, p.id, name).await?;
-                    resource: Some(self.user.xmpp_resource.clone()),
+                }
-                }),
+                _ => {
-                from: Some(Jid {
+                    tracing::error!("Unimplemented case")
-                    name: Some(name.clone()),
+                }
-                    server: Server("rooms.localhost".into()),
+            },
-                    resource: Some(self.user.xmpp_muc_name.clone()),
+            _ => {
-                }),
+                // TODO other presence cases
-                ..Default::default()
+                let response = Presence::<()>::default();
+                response.serialize(output);
             }
-        } else {
+        }
-            Presence::<()>::default()
+        Ok(())
+    }
+
+    async fn join_muc(&mut self, output: &mut Vec<Event<'static>>, id: Option<String>, name: Name) -> Result<()> {
+        // Response presence
+        let mut muc_presence = self.retrieve_muc_presence(&name).await?;
+        muc_presence.id = id;
+        muc_presence.serialize(output);
+
+        // N last messages from the room history before the user joined
+        let messages = self.retrieve_message_history(&name).await?;
+        for message in messages {
+            message.serialize(output)
+        }
+
+        // The subject is the last stanza sent during a MUC join process.
+        let subject = Message::<()> {
+            from: Some(Jid {
+                name: Some(name.clone()),
+                server: Server(self.hostname_rooms.clone()),
+                resource: None,
+            }),
+            id: None,
+            to: Some(Jid {
+                name: Some(self.user.xmpp_name.clone()),
+                server: Server(self.hostname.clone()),
+                resource: Some(self.user.xmpp_resource.clone()),
+            }),
+            r#type: MessageType::Groupchat,
+            lang: None,
+            subject: Some(Subject(None)),
+            body: None,
+            custom: vec![],
+        };
+        subject.serialize(output);
+        Ok(())
+    }
+
+    async fn leave_muc(&mut self, output: &mut Vec<Event<'static>>, id: Option<String>, name: Name) -> Result<()> {
+        self.user_handle.leave_room(RoomId::try_from(name.0.clone())?).await?;
+        let response = Presence {
+            id,
+            to: Some(Jid {
+                name: Some(self.user.xmpp_name.clone()),
+                server: Server(self.hostname.clone()),
+                resource: Some(self.user.xmpp_resource.clone()),
+            }),
+            from: Some(Jid {
+                name: Some(name.clone()),
+                server: Server(self.hostname_rooms.clone()),
+                resource: Some(self.user.xmpp_muc_name.clone()),
+            }),
+            r#type: Some("unavailable".into()),
+            custom: vec![XUser {
+                item: XUserItem {
+                    affiliation: Affiliation::Member,
+                    role: Role::None,
+                    jid: Jid {
+                        name: Some(self.user.xmpp_name.clone()),
+                        server: Server(self.hostname.clone()),
+                        resource: Some(self.user.xmpp_resource.clone()),
+                    },
+                },
+                self_presence: true,
+                just_created: false,
+            }],
+            ..Default::default()
         };
         response.serialize(output);
         Ok(())
     }
+
+    #[tracing::instrument(skip(self, output, r#type), name = "XmppConnection::self_presence")]
+    async fn self_presence(&mut self, output: &mut Vec<Event<'static>>, r#type: Option<&str>) {
+        match r#type {
+            Some("unavailable") => {
+                // do not print anything
+            }
+            None => {
+                let response = Presence::<()> {
+                    to: Some(Jid {
+                        name: Some(self.user.xmpp_name.clone()),
+                        server: Server(self.hostname.clone()),
+                        resource: Some(self.user.xmpp_resource.clone()),
+                    }),
+                    from: Some(Jid {
+                        name: Some(self.user.xmpp_name.clone()),
+                        server: Server(self.hostname.clone()),
+                        resource: Some(self.user.xmpp_resource.clone()),
+                    }),
+                    ..Default::default()
+                };
+                response.serialize(output);
+            }
+            e => {
+                tracing::error!("TODO: unknown presence type: {e:?}");
+            }
+        }
+    }
+
+    #[tracing::instrument(skip(self), name = "XmppConnection::retrieve_muc_presence")]
+    async fn retrieve_muc_presence(&mut self, name: &Name) -> Result<Presence<XUser>> {
+        let _ = self.user_handle.join_room(RoomId::try_from(name.0.clone())?).await?;
+        // TODO handle bans
+        let response = Presence {
+            to: Some(Jid {
+                name: Some(self.user.xmpp_name.clone()),
+                server: Server(self.hostname.clone()),
+                resource: Some(self.user.xmpp_resource.clone()),
+            }),
+            from: Some(Jid {
+                name: Some(name.clone()),
+                server: Server(self.hostname_rooms.clone()),
+                resource: Some(self.user.xmpp_muc_name.clone()),
+            }),
+            custom: vec![XUser {
+                item: XUserItem {
+                    affiliation: Affiliation::Member,
+                    role: Role::Participant,
+                    jid: Jid {
+                        name: Some(self.user.xmpp_name.clone()),
+                        server: Server(self.hostname.clone()),
+                        resource: Some(self.user.xmpp_resource.clone()),
+                    },
+                },
+                self_presence: true,
+                just_created: false, // TODO we don't know this for sure at this point
+            }],
+            ..Default::default()
+        };
+        Ok(response)
+    }
+
+    /// Retrieve a room's message history. The output can be serialized into a stream of XML stanzas.
+    ///
+    /// Example in [XmppHistoryMessage]'s docs.
+    #[tracing::instrument(skip(self), name = "XmppConnection::retrieve_message_history")]
+    async fn retrieve_message_history(&self, room_name: &Name) -> Result<Vec<XmppHistoryMessage>> {
+        let room_id = RoomId::try_from(room_name.0.clone())?;
+        let history_messages = self.user_handle.get_room_message_history(&room_id, 50).await?;
+        let history_messages = match history_messages {
+            RoomHistoryResult::Success(messages) => messages,
+            RoomHistoryResult::NoSuchRoom => {
+                tracing::warn!("No room found during history retrieval on join");
+                return Ok(vec![]);
+            }
+        };
+
+        let mut response = vec![];
+        for history_message in history_messages.into_iter() {
+            response.push(XmppHistoryMessage {
+                id: history_message.id.to_string(),
+                to: Jid {
+                    name: Option::from(Name(self.user.xmpp_muc_name.0.clone().into())),
+                    server: Server(self.hostname.clone()),
+                    resource: None,
+                },
+                from: Jid {
+                    name: Option::from(room_name.clone()),
+                    server: Server(self.hostname_rooms.clone()),
+                    resource: Option::from(Resource(history_message.author_name.clone().into())),
+                },
+                delay: Delay {
+                    from: Jid {
+                        name: Option::from(Name(history_message.author_name.clone().into())),
+                        server: Server(self.hostname_rooms.clone()),
+                        resource: None,
+                    },
+                    stamp: history_message.created_at.to_rfc3339(),
+                },
+                body: history_message.content.clone(),
+            });
+            tracing::info!(
+                "Retrieved message: {:?} {:?}",
+                history_message.author_name,
+                history_message.content.clone()
+            );
+        }
+
+        return Ok(response);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use anyhow::Result;
+
+    use lavina_core::player::{PlayerConnectionResult, PlayerId};
+    use proto_xmpp::bind::{Jid, Name, Resource, Server};
+    use proto_xmpp::client::Presence;
+    use proto_xmpp::muc::{Affiliation, Role, XUser, XUserItem};
+
+    use crate::testkit::{expect_user_authenticated, TestServer};
+    use crate::Authenticated;
+
+    #[tokio::test]
+    async fn test_muc_joining() -> Result<()> {
+        let server = TestServer::start().await?;
+
+        server.core.create_player(&PlayerId::from("tester")?).await?;
+
+        let player_id = PlayerId::from("tester")?;
+        let user = Authenticated {
+            player_id,
+            xmpp_name: Name("tester".into()),
+            xmpp_resource: Resource("tester".into()),
+            xmpp_muc_name: Resource("tester".into()),
+        };
+
+        let mut player_conn = match server.core.connect_to_player(&user.player_id).await? {
+            PlayerConnectionResult::Success(conn) => conn,
+            PlayerConnectionResult::PlayerNotFound => panic!("user was created, but not returned"),
+        };
+        let mut conn = expect_user_authenticated(&server, &user, &mut player_conn).await?;
+
+        let muc_presence = conn.retrieve_muc_presence(&user.xmpp_name).await?;
+        let expected = Presence {
+            to: Some(Jid {
+                name: Some(conn.user.xmpp_name.clone()),
+                server: Server(conn.hostname.clone()),
+                resource: Some(conn.user.xmpp_resource.clone()),
+            }),
+            from: Some(Jid {
+                name: Some(user.xmpp_name.clone()),
+                server: Server(conn.hostname_rooms.clone()),
+                resource: Some(conn.user.xmpp_muc_name.clone()),
+            }),
+            custom: vec![XUser {
+                item: XUserItem {
+                    affiliation: Affiliation::Member,
+                    role: Role::Participant,
+                    jid: Jid {
+                        name: Some(conn.user.xmpp_name.clone()),
+                        server: Server(conn.hostname.clone()),
+                        resource: Some(conn.user.xmpp_resource.clone()),
+                    },
+                },
+                self_presence: true,
+                just_created: false,
+            }],
+            ..Default::default()
+        };
+        assert_eq!(expected, muc_presence);
+
+        server.shutdown().await;
+        Ok(())
+    }
+
+    // Test that joining a room second time after a server restart,
+    // i.e. in-memory cache of memberships is cleaned, does not cause any issues.
+    #[tokio::test]
+    async fn test_muc_joining_twice() -> Result<()> {
+        let server = TestServer::start().await?;
+
+        server.core.create_player(&PlayerId::from("tester")?).await?;
+
+        let player_id = PlayerId::from("tester")?;
+        let user = Authenticated {
+            player_id,
+            xmpp_name: Name("tester".into()),
+            xmpp_resource: Resource("tester".into()),
+            xmpp_muc_name: Resource("tester".into()),
+        };
+
+        let mut player_conn = match server.core.connect_to_player(&user.player_id).await? {
+            PlayerConnectionResult::Success(conn) => conn,
+            PlayerConnectionResult::PlayerNotFound => panic!("user was created, but not returned"),
+        };
+        let mut conn = expect_user_authenticated(&server, &user, &mut player_conn).await?;
+
+        let response = conn.retrieve_muc_presence(&user.xmpp_name).await?;
+        let expected = Presence {
+            to: Some(Jid {
+                name: Some(conn.user.xmpp_name.clone()),
+                server: Server(conn.hostname.clone()),
+                resource: Some(conn.user.xmpp_resource.clone()),
+            }),
+            from: Some(Jid {
+                name: Some(user.xmpp_name.clone()),
+                server: Server(conn.hostname_rooms.clone()),
+                resource: Some(conn.user.xmpp_muc_name.clone()),
+            }),
+            custom: vec![XUser {
+                item: XUserItem {
+                    affiliation: Affiliation::Member,
+                    role: Role::Participant,
+                    jid: Jid {
+                        name: Some(conn.user.xmpp_name.clone()),
+                        server: Server(conn.hostname.clone()),
+                        resource: Some(conn.user.xmpp_resource.clone()),
+                    },
+                },
+                self_presence: true,
+                just_created: false,
+            }],
+            ..Default::default()
+        };
+        assert_eq!(expected, response);
+
+        drop(conn);
+        let server = server.reboot().await.unwrap();
+
+        let mut player_conn = match server.core.connect_to_player(&user.player_id).await? {
+            PlayerConnectionResult::Success(conn) => conn,
+            PlayerConnectionResult::PlayerNotFound => panic!("user was created, but not returned"),
+        };
+        let mut conn = expect_user_authenticated(&server, &user, &mut player_conn).await?;
+
+        let response = conn.retrieve_muc_presence(&user.xmpp_name).await?;
+        assert_eq!(expected, response);
+
+        server.shutdown().await;
+        Ok(())
+    }
 }

crates/projection-xmpp/src/proto.rs

@@ -7,6 +7,7 @@ use lavina_core::prelude::*;
 use proto_xmpp::bind::BindRequest;
 use proto_xmpp::client::{Iq, Message, Presence};
 use proto_xmpp::disco::{InfoQuery, ItemQuery};
+use proto_xmpp::mam::MessageArchiveRequest;
 use proto_xmpp::roster::RosterQuery;
 use proto_xmpp::session::Session;
 use proto_xmpp::xml::*;
@@ -18,6 +19,7 @@ pub enum IqClientBody {
     Roster(RosterQuery),
     DiscoInfo(InfoQuery),
     DiscoItem(ItemQuery),
+    MessageArchiveRequest(MessageArchiveRequest),
     Unknown(Ignore),
 }
 
@@ -25,7 +27,8 @@ impl FromXml for IqClientBody {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let bytes = match event {
                 Event::Start(bytes) => bytes,
                 Event::Empty(bytes) => bytes,
@@ -38,6 +41,7 @@ impl FromXml for IqClientBody {
                 RosterQuery,
                 InfoQuery,
                 ItemQuery,
+                MessageArchiveRequest,
                 {
                     delegate_parsing!(Ignore, namespace, event).into()
                 }
@@ -52,13 +56,15 @@ pub enum ClientPacket {
     Message(Message<Ignore>),
     Presence(Presence<Ignore>),
     StreamEnd,
+    Eos,
 }
 
 impl FromXml for ClientPacket {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             match event {
                 Event::Start(bytes) | Event::Empty(bytes) => {
                     let name = bytes.name();
@@ -83,6 +89,7 @@ impl FromXml for ClientPacket {
                         return Err(anyhow!("Unexpected XML event: {event:?}"));
                     }
                 }
+                Event::Eof => Ok(ClientPacket::Eos),
                 _ => {
                     return Err(anyhow!("Unexpected XML event: {event:?}"));
                 }

crates/projection-xmpp/src/testkit.rs

@@ -0,0 +1,77 @@
+use prometheus::Registry as MetricsRegistry;
+
+use crate::{Authenticated, XmppConnection};
+use lavina_core::clustering::{ClusterConfig, ClusterMetadata};
+use lavina_core::player::PlayerConnection;
+use lavina_core::repo::{Storage, StorageConfig};
+use lavina_core::LavinaCore;
+use proto_xmpp::bind::{BindRequest, BindResponse, Jid, Name, Resource, Server};
+
+pub(crate) struct TestServer {
+    pub core: LavinaCore,
+}
+
+impl TestServer {
+    pub async fn start() -> anyhow::Result<TestServer> {
+        let _ = tracing_subscriber::fmt::try_init();
+        let mut metrics = MetricsRegistry::new();
+        let storage = Storage::open(StorageConfig {
+            db_path: ":memory:".into(),
+        })
+        .await?;
+        let cluster_config = ClusterConfig {
+            metadata: ClusterMetadata {
+                node_id: 0,
+                main_owner: 0,
+                rooms: Default::default(),
+            },
+            addresses: vec![],
+        };
+        let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
+        Ok(TestServer { core })
+    }
+
+    pub async fn reboot(self) -> anyhow::Result<TestServer> {
+        let storage = self.core.shutdown().await;
+
+        let mut metrics = MetricsRegistry::new();
+        let cluster_config = ClusterConfig {
+            metadata: ClusterMetadata {
+                node_id: 0,
+                main_owner: 0,
+                rooms: Default::default(),
+            },
+            addresses: vec![],
+        };
+        let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
+
+        Ok(TestServer { core })
+    }
+
+    pub async fn shutdown(self) {
+        let storage = self.core.shutdown().await;
+        storage.close().await;
+    }
+}
+
+pub async fn expect_user_authenticated<'a>(
+    server: &'a TestServer,
+    user: &'a Authenticated,
+    conn: &'a mut PlayerConnection,
+) -> anyhow::Result<XmppConnection<'a>> {
+    let conn = XmppConnection {
+        user: &user,
+        user_handle: conn,
+        core: &server.core,
+        hostname: "localhost".into(),
+        hostname_rooms: "rooms.localhost".into(),
+    };
+    let result = conn.bind(&BindRequest(Resource("whatever".into()))).await;
+    let expected = BindResponse(Jid {
+        name: Some(Name("tester".into())),
+        server: Server("localhost".into()),
+        resource: Some(Resource("tester".into())),
+    });
+    assert_eq!(expected, result);
+    Ok(conn)
+}

crates/projection-xmpp/src/updates.rs

@@ -17,16 +17,17 @@ impl<'a> XmppConnection<'a> {
                 room_id,
                 author_id,
                 body,
+                created_at: _,
             } => {
                 Message::<()> {
                     to: Some(Jid {
                         name: Some(self.user.xmpp_name.clone()),
-                        server: Server("localhost".into()),
+                        server: Server(self.hostname.clone()),
                         resource: Some(self.user.xmpp_resource.clone()),
                     }),
                     from: Some(Jid {
                         name: Some(Name(room_id.into_inner().into())),
-                        server: Server("rooms.localhost".into()),
+                        server: Server(self.hostname_rooms.clone()),
                         resource: Some(Resource(author_id.into_inner().into())),
                     }),
                     id: None,
@@ -38,6 +39,34 @@ impl<'a> XmppConnection<'a> {
                 }
                 .serialize(output);
             }
+            Updates::NewDialogMessage {
+                sender,
+                receiver,
+                body,
+                created_at: _,
+            } => {
+                if receiver == self.user.player_id {
+                    Message::<()> {
+                        to: Some(Jid {
+                            name: Some(self.user.xmpp_name.clone()),
+                            server: Server(self.hostname.clone()),
+                            resource: Some(self.user.xmpp_resource.clone()),
+                        }),
+                        from: Some(Jid {
+                            name: Some(Name(sender.as_inner().clone())),
+                            server: Server(self.hostname.clone()),
+                            resource: Some(Resource(sender.into_inner())),
+                        }),
+                        id: None,
+                        r#type: MessageType::Chat,
+                        lang: None,
+                        subject: None,
+                        body: body.into(),
+                        custom: vec![],
+                    }
+                    .serialize(output);
+                }
+            }
             _ => {}
         }
         Ok(())

crates/projection-xmpp/tests/lib.rs

@@ -1,3 +1,5 @@
+use std::io::ErrorKind;
+use std::str::from_utf8;
 use std::sync::Arc;
 use std::time::Duration;
 
@@ -5,8 +7,9 @@ use anyhow::Result;
 use assert_matches::*;
 use prometheus::Registry as MetricsRegistry;
 use quick_xml::events::Event;
+use quick_xml::name::LocalName;
 use quick_xml::NsReader;
-use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+use tokio::io::{AsyncBufReadExt, AsyncReadExt, AsyncWriteExt, BufReader};
 use tokio::io::{ReadHalf as GenericReadHalf, WriteHalf as GenericWriteHalf};
 use tokio::net::tcp::{ReadHalf, WriteHalf};
 use tokio::net::TcpStream;
@@ -15,11 +18,15 @@ use tokio_rustls::rustls::client::ServerCertVerifier;
 use tokio_rustls::rustls::{ClientConfig, ServerName};
 use tokio_rustls::TlsConnector;
 
-use lavina_core::player::PlayerRegistry;
+use lavina_core::clustering::{ClusterConfig, ClusterMetadata};
+use lavina_core::player::PlayerId;
 use lavina_core::repo::{Storage, StorageConfig};
-use lavina_core::room::RoomRegistry;
+use lavina_core::LavinaCore;
-use projection_xmpp::{launch, ServerConfig};
+use projection_xmpp::{launch, RunningServer, ServerConfig};
-use proto_xmpp::xml::{Continuation, FromXml, Parser};
+
+fn element_name<'a>(local_name: &LocalName<'a>) -> &'a str {
+    from_utf8(local_name.into_inner()).unwrap()
+}
 
 pub async fn read_irc_message(reader: &mut BufReader<ReadHalf<'_>>, buf: &mut Vec<u8>) -> Result<usize> {
     let mut size = 0;
@@ -54,19 +61,13 @@ impl<'a> TestScope<'a> {
         Ok(event)
     }
 
-    async fn read<T: FromXml>(&mut self) -> Result<T> {
+    async fn expect_starttls_required(&mut self) -> Result<()> {
-        self.buffer.clear();
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "features"));
-        let (ns, event) = self.reader.read_resolved_event_into_async(&mut self.buffer).await?;
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "starttls"));
-        let mut parser: Continuation<_, std::result::Result<T, anyhow::Error>> = T::parse().consume(ns, &event);
+        assert_matches!(self.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "required"));
-        loop {
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "starttls"));
-            match parser {
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "features"));
-                Continuation::Final(res) => return Ok(res?),
+        Ok(())
-                Continuation::Continue(next) => {
-                    let (ns, event) = self.reader.read_resolved_event_into_async(&mut self.buffer).await?;
-                    parser = next.consume(ns, &event);
-                }
-            }
-        }
     }
 }
 
@@ -81,7 +82,7 @@ impl<'a> TestScopeTls<'a> {
     fn new(stream: &'a mut TlsStream<TcpStream>, buffer: Vec<u8>) -> TestScopeTls<'a> {
         let (reader, writer) = tokio::io::split(stream);
         let reader = NsReader::from_reader(BufReader::new(reader));
-        let timeout = Duration::from_millis(100);
+        let timeout = Duration::from_millis(500);
 
         TestScopeTls {
             reader,
@@ -97,6 +98,24 @@ impl<'a> TestScopeTls<'a> {
         Ok(())
     }
 
+    async fn expect_auth_mechanisms(&mut self) -> Result<()> {
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "features"));
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "mechanisms"));
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "mechanism"));
+        assert_matches!(self.next_xml_event().await?, Event::Text(b) => assert_eq!(&*b, b"PLAIN"));
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "mechanism"));
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "mechanisms"));
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "features"));
+        Ok(())
+    }
+
+    async fn expect_bind_feature(&mut self) -> Result<()> {
+        assert_matches!(self.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "features"));
+        assert_matches!(self.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "bind"));
+        assert_matches!(self.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "features"));
+        Ok(())
+    }
+
     async fn next_xml_event(&mut self) -> Result<Event<'_>> {
         self.buffer.clear();
         let event = self.reader.read_event_into_async(&mut self.buffer);
@@ -106,6 +125,7 @@ impl<'a> TestScopeTls<'a> {
 }
 
 struct IgnoreCertVerification;
+
 impl ServerCertVerifier for IgnoreCertVerification {
     fn verify_server_cert(
         &self,
@@ -120,43 +140,66 @@ impl ServerCertVerifier for IgnoreCertVerification {
     }
 }
 
+struct TestServer {
+    core: LavinaCore,
+    server: RunningServer,
+}
+
+impl TestServer {
+    async fn start() -> Result<TestServer> {
+        let _ = tracing_subscriber::fmt::try_init();
+        let config = ServerConfig {
+            listen_on: "127.0.0.1:0".parse()?,
+            cert: "tests/certs/xmpp.pem".parse()?,
+            key: "tests/certs/xmpp.key".parse()?,
+            hostname: "localhost".into(),
+        };
+        let mut metrics = MetricsRegistry::new();
+        let storage = Storage::open(StorageConfig {
+            db_path: ":memory:".into(),
+        })
+        .await?;
+        let cluster_config = ClusterConfig {
+            addresses: vec![],
+            metadata: ClusterMetadata {
+                node_id: 0,
+                main_owner: 0,
+                rooms: Default::default(),
+            },
+        };
+        let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
+        let server = launch(config, core.clone(), metrics.clone()).await.unwrap();
+        Ok(TestServer { core, server })
+    }
+
+    async fn shutdown(self) -> Result<()> {
+        self.server.terminate().await?;
+        let storage = self.core.shutdown().await;
+        storage.close().await;
+        Ok(())
+    }
+}
+
 #[tokio::test]
 async fn scenario_basic() -> Result<()> {
-    tracing_subscriber::fmt::init();
+    let server = TestServer::start().await?;
-    let config = ServerConfig {
-        listen_on: "127.0.0.1:0".parse().unwrap(),
-        cert: "tests/certs/xmpp.pem".parse().unwrap(),
-        key: "tests/certs/xmpp.key".parse().unwrap(),
-    };
-    let mut metrics = MetricsRegistry::new();
-    let mut storage = Storage::open(StorageConfig {
-        db_path: ":memory:".into(),
-    })
-    .await?;
-    let rooms = RoomRegistry::new(&mut metrics, storage.clone()).unwrap();
-    let players = PlayerRegistry::empty(rooms.clone(), &mut metrics).unwrap();
-    let server = launch(config, players, rooms, metrics, storage.clone()).await.unwrap();
 
     // test scenario
 
-    storage.create_user("tester").await?;
+    server.core.create_player(&PlayerId::from("tester")?).await?;
-    storage.set_password("tester", "password").await?;
+    server.core.set_password("tester", "password").await?;
 
-    let mut stream = TcpStream::connect(server.addr).await?;
+    let mut stream = TcpStream::connect(server.server.addr).await?;
     let mut s = TestScope::new(&mut stream);
     tracing::info!("TCP connection established");
 
     s.send(r#"<?xml version="1.0"?>"#).await?;
     s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
     assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
-    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(b.local_name().into_inner(), b"stream"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
-    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(b.local_name().into_inner(), b"features"));
+    s.expect_starttls_required().await?;
-    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(b.local_name().into_inner(), b"starttls"));
-    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(b.local_name().into_inner(), b"required"));
-    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(b.local_name().into_inner(), b"starttls"));
-    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(b.local_name().into_inner(), b"features"));
     s.send(r#"<starttls/>"#).await?;
-    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(b.local_name().into_inner(), b"proceed"));
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "proceed"));
     let buffer = s.buffer;
     tracing::info!("TLS feature negotiation complete");
 
@@ -167,7 +210,7 @@ async fn scenario_basic() -> Result<()> {
             .with_no_client_auth(),
     ));
     tracing::info!("Initiating TLS connection...");
-    let mut stream = connector.connect(ServerName::IpAddress(server.addr.ip()), stream).await?;
+    let mut stream = connector.connect(ServerName::IpAddress(server.server.addr.ip()), stream).await?;
     tracing::info!("TLS connection established");
 
     let mut s = TestScopeTls::new(&mut stream, buffer);
@@ -175,12 +218,259 @@ async fn scenario_basic() -> Result<()> {
     s.send(r#"<?xml version="1.0"?>"#).await?;
     s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
     assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
-    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(b.local_name().into_inner(), b"stream"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_auth_mechanisms().await?;
+
+    // base64-encoded "\x00tester\x00password"
+    s.send(r#"<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN">AHRlc3RlcgBwYXNzd29yZA==</auth>"#)
+        .await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "success"));
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_bind_feature().await?;
+    s.send(r#"<iq id="bind_1" type="set"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><resource>kek</resource></bind></iq>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "iq"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "bind"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "jid"));
+    assert_matches!(s.next_xml_event().await?, Event::Text(b) => assert_eq!(&*b, b"tester@localhost/tester"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "jid"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "bind"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "iq"));
+    s.send(r#"<presence xmlns="jabber:client" type="unavailable"><status>Logged out</status></presence>"#).await?;
 
     stream.shutdown().await?;
 
     // wrap up
 
-    server.terminate().await?;
+    server.shutdown().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_wrong_password() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+    tracing::info!("TCP connection established");
+
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_starttls_required().await?;
+    s.send(r#"<starttls/>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "proceed"));
+    let buffer = s.buffer;
+    tracing::info!("TLS feature negotiation complete");
+
+    let connector = TlsConnector::from(Arc::new(
+        ClientConfig::builder()
+            .with_safe_defaults()
+            .with_custom_certificate_verifier(Arc::new(IgnoreCertVerification))
+            .with_no_client_auth(),
+    ));
+    tracing::info!("Initiating TLS connection...");
+    let mut stream = connector.connect(ServerName::IpAddress(server.server.addr.ip()), stream).await?;
+    tracing::info!("TLS connection established");
+
+    let mut s = TestScopeTls::new(&mut stream, buffer);
+
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_auth_mechanisms().await?;
+    // base64-encoded "\x00tester\x00password2"
+    s.send(r#"<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN">AHRlc3RlcgBwYXNzd29yZDI=</auth>"#)
+        .await?;
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "failure"));
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "not-authorized"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "failure"));
+
+    let _ = stream.shutdown().await;
+
+    // wrap up
+
+    server.shutdown().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn scenario_basic_without_headers() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+    tracing::info!("TCP connection established");
+
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_starttls_required().await?;
+    s.send(r#"<starttls/>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "proceed"));
+    let buffer = s.buffer;
+    tracing::info!("TLS feature negotiation complete");
+
+    let connector = TlsConnector::from(Arc::new(
+        ClientConfig::builder()
+            .with_safe_defaults()
+            .with_custom_certificate_verifier(Arc::new(IgnoreCertVerification))
+            .with_no_client_auth(),
+    ));
+    tracing::info!("Initiating TLS connection...");
+    let mut stream = connector.connect(ServerName::IpAddress(server.server.addr.ip()), stream).await?;
+    tracing::info!("TLS connection established");
+
+    let mut s = TestScopeTls::new(&mut stream, buffer);
+
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn terminate_socket() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+    tracing::info!("TCP connection established");
+
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_starttls_required().await?;
+    s.send(r#"<starttls/>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "proceed"));
+
+    let connector = TlsConnector::from(Arc::new(
+        ClientConfig::builder()
+            .with_safe_defaults()
+            .with_custom_certificate_verifier(Arc::new(IgnoreCertVerification))
+            .with_no_client_auth(),
+    ));
+
+    tracing::info!("Initiating TLS connection...");
+    let mut stream = connector.connect(ServerName::IpAddress(server.server.addr.ip()), stream).await?;
+    tracing::info!("TLS connection established");
+
+    server.shutdown().await?;
+
+    assert_eq!(stream.read_u8().await.unwrap_err().kind(), ErrorKind::UnexpectedEof);
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_message_archive_request() -> Result<()> {
+    let server = TestServer::start().await?;
+
+    // test scenario
+
+    server.core.create_player(&PlayerId::from("tester")?).await?;
+    server.core.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(server.server.addr).await?;
+    let mut s = TestScope::new(&mut stream);
+    tracing::info!("TCP connection established");
+
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_starttls_required().await?;
+    s.send(r#"<starttls/>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "proceed"));
+    let buffer = s.buffer;
+    tracing::info!("TLS feature negotiation complete");
+
+    let connector = TlsConnector::from(Arc::new(
+        ClientConfig::builder()
+            .with_safe_defaults()
+            .with_custom_certificate_verifier(Arc::new(IgnoreCertVerification))
+            .with_no_client_auth(),
+    ));
+    tracing::info!("Initiating TLS connection...");
+    let mut stream = connector.connect(ServerName::IpAddress(server.server.addr.ip()), stream).await?;
+    tracing::info!("TLS connection established");
+
+    let mut s = TestScopeTls::new(&mut stream, buffer);
+
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_auth_mechanisms().await?;
+
+    // base64-encoded "\x00tester\x00password"
+    s.send(r#"<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN">AHRlc3RlcgBwYXNzd29yZA==</auth>"#)
+        .await?;
+    assert_matches!(s.next_xml_event().await?, Event::Empty(b) => assert_eq!(element_name(&b.local_name()), "success"));
+    s.send(r#"<?xml version="1.0"?>"#).await?;
+    s.send(r#"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="127.0.0.1" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns="jabber:client" version="1.0">"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Decl(_) => {});
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "stream"));
+    s.expect_bind_feature().await?;
+    s.send(r#"<iq id="bind_1" type="set"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><resource>kek</resource></bind></iq>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "iq"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "bind"));
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => assert_eq!(element_name(&b.local_name()), "jid"));
+    assert_matches!(s.next_xml_event().await?, Event::Text(b) => assert_eq!(&*b, b"tester@localhost/tester"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "jid"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "bind"));
+    assert_matches!(s.next_xml_event().await?, Event::End(b) => assert_eq!(element_name(&b.local_name()), "iq"));
+
+    s.send(r#"<iq type='get' id='juliet1'><query xmlns='urn:xmpp:mam:2' queryid='f27'/></iq>"#).await?;
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => {
+        assert_eq!(element_name(&b.local_name()), "iq")
+    });
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => {
+        assert_eq!(element_name(&b.local_name()), "fin")
+    });
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => {
+        assert_eq!(element_name(&b.local_name()), "set")
+    });
+    assert_matches!(s.next_xml_event().await?, Event::Start(b) => {
+        assert_eq!(element_name(&b.local_name()), "count")
+    });
+    assert_matches!(s.next_xml_event().await?, Event::Text(b) => {
+        assert_eq!(&*b, b"0")
+    });
+
+    s.send(r#"<presence xmlns="jabber:client" type="unavailable"><status>Logged out</status></presence>"#).await?;
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.shutdown().await?;
     Ok(())
 }

crates/proto-irc/src/client.rs

@@ -1,66 +1,82 @@
-use super::*;
-
 use anyhow::{anyhow, Result};
 use nom::combinator::{all_consuming, opt};
 use nonempty::NonEmpty;
 
+use super::*;
+
 /// Client-to-server command.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum ClientMessage {
-    /// CAP. Capability-related commands.
+    /// `CAP`. Capability-related commands.
     Capability {
         subcommand: CapabilitySubcommand,
     },
-    /// PING <token>
+    /// `PING <token>`
     Ping {
         token: Str,
     },
-    /// PONG <token>
+    /// `PONG <token>`
     Pong {
         token: Str,
     },
-    /// NICK <nickname>
+    /// `NICK <nickname>`
     Nick {
         nickname: Str,
     },
-    /// PASS <password>
+    /// `PASS <password>`
     Pass {
         password: Str,
     },
-    /// USER <username> 0 * :<realname>
+    /// `USER <username> 0 * :<realname>`
     User {
         username: Str,
         realname: Str,
     },
-    /// JOIN <chan>
+    /// `JOIN <chan>`
     Join(Chan),
-    /// MODE <target>
+    /// `MODE <target>`
     Mode {
         target: Recipient,
     },
-    /// WHO <target>
+    /// `WHO <target>`
     Who {
         target: Recipient, // aka mask
     },
-    /// TOPIC <chan> :<topic>
+    /// WHOIS [<target>] <nick>
+    Whois(Whois),
+    /// `TOPIC <chan> :<topic>`
     Topic {
         chan: Chan,
         topic: Str,
     },
     Part {
         chan: Chan,
-        message: Str,
+        message: Option<Str>,
     },
-    /// PRIVMSG <target> :<msg>
+    /// `PRIVMSG <target> :<msg>`
     PrivateMessage {
         recipient: Recipient,
         body: Str,
     },
-    /// QUIT :<reason>
+    /// `QUIT :<reason>`
     Quit {
         reason: Str,
     },
     Authenticate(Str),
+    ChatHistory(ChatHistory),
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Whois {
+    Nick(Str),
+    TargetNick(Str, Str),
+    EmptyArgs,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct ChatHistory {
+    pub chan: Chan,
+    pub limit: u32,
 }
 
 pub fn client_message(input: &str) -> Result<ClientMessage> {
@@ -74,11 +90,13 @@ pub fn client_message(input: &str) -> Result<ClientMessage> {
         client_message_join,
         client_message_mode,
         client_message_who,
+        client_message_whois,
         client_message_topic,
         client_message_part,
         client_message_privmsg,
         client_message_quit,
         client_message_authenticate,
+        client_message_chathistory,
     )))(input);
     match res {
         Ok((_, e)) => Ok(e),
@@ -118,6 +136,7 @@ fn client_message_nick(input: &str) -> IResult<&str, ClientMessage> {
         },
     ))
 }
+
 fn client_message_pass(input: &str) -> IResult<&str, ClientMessage> {
     let (input, _) = tag("PASS ")(input)?;
     let (input, r) = opt(tag(":"))(input)?;
@@ -156,6 +175,7 @@ fn client_message_user(input: &str) -> IResult<&str, ClientMessage> {
         },
     ))
 }
+
 fn client_message_join(input: &str) -> IResult<&str, ClientMessage> {
     let (input, _) = tag("JOIN ")(input)?;
     let (input, chan) = chan(input)?;
@@ -177,6 +197,16 @@ fn client_message_who(input: &str) -> IResult<&str, ClientMessage> {
     Ok((input, ClientMessage::Who { target }))
 }
 
+fn client_message_whois(input: &str) -> IResult<&str, ClientMessage> {
+    let (input, _) = tag("WHOIS ")(input)?;
+    let args: Vec<_> = input.split_whitespace().collect();
+    match args.as_slice()[..] {
+        [nick] => Ok(("", ClientMessage::Whois(Whois::Nick(nick.into())))),
+        [target, nick, ..] => Ok(("", ClientMessage::Whois(Whois::TargetNick(target.into(), nick.into())))),
+        [] => Ok(("", ClientMessage::Whois(Whois::EmptyArgs))),
+    }
+}
+
 fn client_message_topic(input: &str) -> IResult<&str, ClientMessage> {
     let (input, _) = tag("TOPIC ")(input)?;
     let (input, chan) = chan(input)?;
@@ -194,14 +224,20 @@ fn client_message_topic(input: &str) -> IResult<&str, ClientMessage> {
 fn client_message_part(input: &str) -> IResult<&str, ClientMessage> {
     let (input, _) = tag("PART ")(input)?;
     let (input, chan) = chan(input)?;
-    let (input, _) = tag(" ")(input)?;
+    let (input, t) = opt(tag(" "))(input)?;
+    match t {
+        Some(_) => (),
+        None => {
+            return Ok((input, ClientMessage::Part { chan, message: None }));
+        }
+    }
     let (input, r) = opt(tag(":"))(input)?;
     let (input, message) = match r {
         Some(_) => token(input)?,
         None => receiver(input)?,
     };
 
-    let message = message.into();
+    let message = Some(message.into());
     Ok((input, ClientMessage::Part { chan, message }))
 }
 
@@ -233,6 +269,22 @@ fn client_message_authenticate(input: &str) -> IResult<&str, ClientMessage> {
     Ok((input, ClientMessage::Authenticate(body.into())))
 }
 
+fn client_message_chathistory(input: &str) -> IResult<&str, ClientMessage> {
+    let (input, _) = tag("CHATHISTORY LATEST ")(input)?;
+    let (input, chan) = chan(input)?;
+
+    let (input, _) = tag(" * ")(input)?;
+    let (input, limit) = limit(input)?;
+
+    Ok((input, ClientMessage::ChatHistory(ChatHistory { chan, limit })))
+}
+
+fn limit(input: &str) -> IResult<&str, u32> {
+    let (input, limit) = receiver(input)?;
+    let limit = limit.parse().unwrap();
+    Ok((input, limit))
+}
+
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum CapabilitySubcommand {
     /// CAP LS {code}
@@ -305,6 +357,7 @@ mod test {
     use nonempty::nonempty;
 
     use super::*;
+
     #[test]
     fn test_client_message_cap_ls() {
         let input = "CAP LS 302";
@@ -335,6 +388,7 @@ mod test {
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
     #[test]
     fn test_client_message_pong() {
         let input = "PONG 1337";
@@ -343,6 +397,7 @@ mod test {
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
     #[test]
     fn test_client_message_nick() {
         let input = "NICK SomeNick";
@@ -353,6 +408,56 @@ mod test {
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
+    #[test]
+    fn test_client_message_whois() {
+        let test_user = "WHOIS val";
+        let test_user_user = "WHOIS val val";
+        let test_server_user = "WHOIS com.test.server user";
+        let test_user_server = "WHOIS user com.test.server";
+        let test_users_list = "WHOIS user_1,user_2,user_3";
+        let test_server_users_list = "WHOIS com.test.server user_1,user_2,user_3";
+        let test_more_than_two_params = "WHOIS test.server user_1,user_2,user_3 whatever spam";
+        let test_none_none_params = "WHOIS   ";
+
+        let res_one_arg = client_message(test_user);
+        let res_user_user = client_message(test_user_user);
+
+        let res_server_user = client_message(test_server_user);
+        let res_user_server = client_message(test_user_server);
+        let res_users_list = client_message(test_users_list);
+        let res_server_users_list = client_message(test_server_users_list);
+        let res_more_than_two_params = client_message(test_more_than_two_params);
+        let res_none_none_params = client_message(test_none_none_params);
+
+        let expected_arg = ClientMessage::Whois(Whois::Nick("val".into()));
+        let expected_user_user = ClientMessage::Whois(Whois::TargetNick("val".into(), "val".into()));
+
+        let expected_server_user = ClientMessage::Whois(Whois::TargetNick("com.test.server".into(), "user".into()));
+
+        let expected_user_server = ClientMessage::Whois(Whois::TargetNick("user".into(), "com.test.server".into()));
+
+        let expected_user_list = ClientMessage::Whois(Whois::Nick("user_1,user_2,user_3".into()));
+        let expected_server_user_list = ClientMessage::Whois(Whois::TargetNick(
+            "com.test.server".into(),
+            "user_1,user_2,user_3".into(),
+        ));
+
+        let expected_more_than_two_params =
+            ClientMessage::Whois(Whois::TargetNick("test.server".into(), "user_1,user_2,user_3".into()));
+
+        let expected_none_none_params = ClientMessage::Whois(Whois::EmptyArgs);
+
+        assert_matches!(res_one_arg, Ok(result) => assert_eq!(expected_arg, result));
+        assert_matches!(res_user_user, Ok(result) => assert_eq!(expected_user_user, result));
+        assert_matches!(res_server_user, Ok(result) => assert_eq!(expected_server_user, result));
+        assert_matches!(res_user_server, Ok(result) => assert_eq!(expected_user_server, result));
+        assert_matches!(res_users_list, Ok(result) => assert_eq!(expected_user_list, result));
+        assert_matches!(res_server_users_list, Ok(result) => assert_eq!(expected_server_user_list, result));
+        assert_matches!(res_more_than_two_params, Ok(result) => assert_eq!(expected_more_than_two_params, result));
+        assert_matches!(res_none_none_params, Ok(result) => assert_eq!(expected_none_none_params, result))
+    }
+
     #[test]
     fn test_client_message_user() {
         let input = "USER SomeNick 8 * :Real Name";
@@ -364,17 +469,31 @@ mod test {
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
     #[test]
     fn test_client_message_part() {
         let input = "PART #chan :Pokasiki !!!";
         let expected = ClientMessage::Part {
             chan: Chan::Global("chan".into()),
-            message: "Pokasiki !!!".into(),
+            message: Some("Pokasiki !!!".into()),
         };
 
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
+    #[test]
+    fn test_client_message_part_empty() {
+        let input = "PART #chan";
+        let expected = ClientMessage::Part {
+            chan: Chan::Global("chan".into()),
+            message: None,
+        };
+
+        let result = client_message(input);
+        assert_matches!(result, Ok(result) => assert_eq!(expected, result));
+    }
+
     #[test]
     fn test_client_cap_req() {
         let input = "CAP REQ :multi-prefix -sasl";
@@ -394,4 +513,16 @@ mod test {
         let result = client_message(input);
         assert_matches!(result, Ok(result) => assert_eq!(expected, result));
     }
+
+    #[test]
+    fn test_client_chat_history_latest() {
+        let input = "CHATHISTORY LATEST #chan * 10";
+        let expected = ClientMessage::ChatHistory(ChatHistory {
+            chan: Chan::Global("chan".into()),
+            limit: 10,
+        });
+
+        let result = client_message(input);
+        assert_matches!(result, Ok(result) => assert_eq!(expected, result));
+    }
 }

crates/proto-irc/src/commands/mod.rs

@@ -0,0 +1 @@
+pub mod whois;

crates/proto-irc/src/commands/whois/error.rs

@@ -0,0 +1,67 @@
+use tokio::io::{AsyncWrite, AsyncWriteExt};
+
+use crate::{prelude::Str, response::WriteResponse};
+
+///  ErrNoSuchNick401  
+pub struct ErrNoSuchNick401 {
+    client: Str,
+    nick: Str,
+}
+
+impl ErrNoSuchNick401 {
+    pub fn new(client: Str, nick: Str) -> Self {
+        ErrNoSuchNick401 { client, nick }
+    }
+}
+
+/// ErrNoSuchServer402
+struct ErrNoSuchServer402 {
+    client: Str,
+    /// target parameter in WHOIS
+    /// example:  `/whois <target> <nick>`
+    server_name: Str,
+}
+
+///  ErrNoNicknameGiven431
+pub struct ErrNoNicknameGiven431 {
+    client: Str,
+}
+impl ErrNoNicknameGiven431 {
+    pub fn new(client: Str) -> Self {
+        ErrNoNicknameGiven431 { client }
+    }
+}
+
+impl WriteResponse for ErrNoSuchNick401 {
+    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        writer.write_all(b"401 ").await?;
+        writer.write_all(self.client.as_bytes()).await?;
+        writer.write_all(b" ").await?;
+        writer.write_all(self.nick.as_bytes()).await?;
+        writer.write_all(b" :").await?;
+        writer.write_all("No such nick/channel".as_bytes()).await?;
+        Ok(())
+    }
+}
+
+impl WriteResponse for ErrNoNicknameGiven431 {
+    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        writer.write_all(b"431").await?;
+        writer.write_all(self.client.as_bytes()).await?;
+        writer.write_all(b" :").await?;
+        writer.write_all("No nickname given".as_bytes()).await?;
+        Ok(())
+    }
+}
+
+impl WriteResponse for ErrNoSuchServer402 {
+    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        writer.write_all(b"402 ").await?;
+        writer.write_all(self.client.as_bytes()).await?;
+        writer.write_all(b" ").await?;
+        writer.write_all(self.server_name.as_bytes()).await?;
+        writer.write_all(b" :").await?;
+        writer.write_all("No such server".as_bytes()).await?;
+        Ok(())
+    }
+}

crates/proto-irc/src/commands/whois/mod.rs

@@ -0,0 +1,2 @@
+pub mod error;
+pub mod response;

crates/proto-irc/src/commands/whois/response.rs

@@ -0,0 +1,24 @@
+use tokio::io::{AsyncWrite, AsyncWriteExt};
+
+use crate::{prelude::Str, response::WriteResponse};
+
+pub struct RplEndOfWhois318 {
+    client: Str,
+    nick: Str,
+}
+impl RplEndOfWhois318 {
+    pub fn new(client: Str, nick: Str) -> Self {
+        RplEndOfWhois318 { client, nick }
+    }
+}
+impl WriteResponse for RplEndOfWhois318 {
+    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        writer.write_all(b"318 ").await?;
+        writer.write_all(self.client.as_bytes()).await?;
+        writer.write_all(b" ").await?;
+        writer.write_all(self.nick.as_bytes()).await?;
+        writer.write_all(b" :").await?;
+        writer.write_all("End of /WHOIS list".as_bytes()).await?;
+        Ok(())
+    }
+}

crates/proto-irc/src/lib.rs

@@ -1,6 +1,8 @@
 //! Client-to-Server IRC protocol.
 pub mod client;
+pub mod commands;
 mod prelude;
+pub mod response;
 pub mod server;
 #[cfg(test)]
 mod testkit;
@@ -18,8 +20,19 @@ use tokio::io::{AsyncWrite, AsyncWriteExt};
 /// Single message tag value.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct Tag {
-    key: Str,
+    pub key: Str,
-    value: Option<u8>,
+    pub value: Option<Str>,
+}
+
+impl Tag {
+    pub async fn write_async(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        writer.write_all(self.key.as_bytes()).await?;
+        if let Some(value) = &self.value {
+            writer.write_all(b"=").await?;
+            writer.write_all(value.as_bytes()).await?;
+        }
+        Ok(())
+    }
 }
 
 fn receiver(input: &str) -> IResult<&str, &str> {
@@ -36,9 +49,9 @@ fn params(input: &str) -> IResult<&str, &str> {
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum Chan {
-    /// #<name> — network-global channel, available from any server in the network.
+    /// `#<name>` — network-global channel, available from any server in the network.
     Global(Str),
-    /// &<name> — server-local channel, available only to connections to the same server. Rarely used in practice.
+    /// `&<name>` — server-local channel, available only to connections to the same server. Rarely used in practice.
     Local(Str),
 }
 impl Chan {
@@ -118,9 +131,7 @@ mod test {
         assert_matches!(result, Ok((_, result)) => assert_eq!(expected, result));
 
         let mut bytes = vec![];
-        sync_future(expected.write_async(&mut bytes))
+        sync_future(expected.write_async(&mut bytes)).unwrap().unwrap();
-            .unwrap()
-            .unwrap();
 
         assert_eq!(bytes.as_slice(), input.as_bytes());
     }
@@ -134,9 +145,7 @@ mod test {
         assert_matches!(result, Ok((_, result)) => assert_eq!(expected, result));
 
         let mut bytes = vec![];
-        sync_future(expected.write_async(&mut bytes))
+        sync_future(expected.write_async(&mut bytes)).unwrap().unwrap();
-            .unwrap()
-            .unwrap();
 
         assert_eq!(bytes.as_slice(), input.as_bytes());
     }
@@ -150,9 +159,7 @@ mod test {
         assert_matches!(result, Ok((_, result)) => assert_eq!(expected, result));
 
         let mut bytes = vec![];
-        sync_future(expected.write_async(&mut bytes))
+        sync_future(expected.write_async(&mut bytes)).unwrap().unwrap();
-            .unwrap()
-            .unwrap();
 
         assert_eq!(bytes.as_slice(), input.as_bytes());
     }

crates/proto-irc/src/response.rs

@@ -0,0 +1,47 @@
+use std::future::Future;
+
+use tokio::io::{AsyncWrite, AsyncWriteExt};
+
+use crate::prelude::Str;
+use crate::Tag;
+
+pub trait WriteResponse {
+    fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> impl Future<Output = std::io::Result<()>>;
+}
+
+/// Server-to-client enum agnostic message
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct IrcResponseMessage<T> {
+    /// Optional tags section, prefixed with `@`
+    pub tags: Vec<Tag>,
+    /// Optional server name, prefixed with `:`.
+    pub sender: Option<Str>,
+    pub body: T,
+}
+
+impl<T> IrcResponseMessage<T> {
+    pub fn empty_tags(sender: Option<Str>, body: T) -> Self {
+        IrcResponseMessage {
+            tags: vec![],
+            sender,
+            body,
+        }
+    }
+
+    pub fn new(tags: Vec<Tag>, sender: Option<Str>, body: T) -> Self {
+        IrcResponseMessage { tags, sender, body }
+    }
+}
+
+impl<T: WriteResponse> WriteResponse for IrcResponseMessage<T> {
+    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        if let Some(sender) = &self.sender {
+            writer.write_all(b":").await?;
+            writer.write_all(sender.as_bytes()).await?;
+            writer.write_all(b" ").await?;
+        }
+        self.body.write_response(writer).await?;
+        writer.write_all(b"\r\n").await?;
+        Ok(())
+    }
+}

crates/proto-irc/src/server.rs

@@ -1,12 +1,11 @@
-use std::sync::Arc;
-
 use nonempty::NonEmpty;
 use tokio::io::AsyncWrite;
 use tokio::io::AsyncWriteExt;
 
-use super::*;
 use crate::user::PrefixedNick;
 
+use super::*;
+
 /// Server-to-client message.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct ServerMessage {
@@ -19,6 +18,13 @@ pub struct ServerMessage {
 
 impl ServerMessage {
     pub async fn write_async(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
+        if !self.tags.is_empty() {
+            for tag in &self.tags {
+                writer.write_all(b"@").await?;
+                tag.write_async(writer).await?;
+                writer.write_all(b" ").await?;
+            }
+        }
         match &self.sender {
             Some(ref sender) => {
                 writer.write_all(b":").await?;
@@ -107,6 +113,12 @@ pub enum ServerMessageBody {
         /// Usually `b"End of WHO list"`
         msg: Str,
     },
+    N318EndOfWhois {
+        client: Str,
+        nick: Str,
+        /// Usually `b"End of /WHOIS list"`
+        msg: Str,
+    },
     N332Topic {
         client: Str,
         chat: Chan,
@@ -136,6 +148,10 @@ pub enum ServerMessageBody {
         client: Str,
         chan: Chan,
     },
+    N431ErrNoNicknameGiven {
+        client: Str,
+        message: Str,
+    },
     N474BannedFromChan {
         client: Str,
         chan: Chan,
@@ -158,7 +174,7 @@ pub enum ServerMessageBody {
     N904SaslFail {
         nick: Str,
         text: Str,
-    }
+    },
 }
 
 impl ServerMessageBody {
@@ -273,11 +289,15 @@ impl ServerMessageBody {
                 writer.write_all(b" :").await?;
                 writer.write_all(msg.as_bytes()).await?;
             }
-            ServerMessageBody::N332Topic {
+            ServerMessageBody::N318EndOfWhois { client, nick, msg } => {
-                client,
+                writer.write_all(b"318 ").await?;
-                chat,
+                writer.write_all(client.as_bytes()).await?;
-                topic,
+                writer.write_all(b" ").await?;
-            } => {
+                writer.write_all(nick.as_bytes()).await?;
+                writer.write_all(b" :").await?;
+                writer.write_all(msg.as_bytes()).await?;
+            }
+            ServerMessageBody::N332Topic { client, chat, topic } => {
                 writer.write_all(b"332 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" ").await?;
@@ -315,22 +335,21 @@ impl ServerMessageBody {
                 writer.write_all(b" ").await?;
                 writer.write_all(realname.as_bytes()).await?;
             }
-            ServerMessageBody::N353NamesReply {
+            ServerMessageBody::N353NamesReply { client, chan, members } => {
-                client,
-                chan,
-                members,
-            } => {
                 writer.write_all(b"353 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" = ").await?;
                 chan.write_async(writer).await?;
                 writer.write_all(b" :").await?;
-                for member in members {
+                {
-                    writer
+                    let member = &members.head;
-                        .write_all(member.prefix.to_string().as_bytes())
+                    writer.write_all(member.prefix.to_string().as_bytes()).await?;
-                        .await?;
                     writer.write_all(member.nick.as_bytes()).await?;
+                }
+                for member in &members.tail {
                     writer.write_all(b" ").await?;
+                    writer.write_all(member.prefix.to_string().as_bytes()).await?;
+                    writer.write_all(member.nick.as_bytes()).await?;
                 }
             }
             ServerMessageBody::N366NamesReplyEnd { client, chan } => {
@@ -340,11 +359,13 @@ impl ServerMessageBody {
                 chan.write_async(writer).await?;
                 writer.write_all(b" :End of /NAMES list").await?;
             }
-            ServerMessageBody::N474BannedFromChan {
+            ServerMessageBody::N431ErrNoNicknameGiven { client, message } => {
-                client,
+                writer.write_all(b"431").await?;
-                chan,
+                writer.write_all(client.as_bytes()).await?;
-                message,
+                writer.write_all(b" :").await?;
-            } => {
+                writer.write_all(message.as_bytes()).await?;
+            }
+            ServerMessageBody::N474BannedFromChan { client, chan, message } => {
                 writer.write_all(b"474 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" ").await?;
@@ -359,7 +380,12 @@ impl ServerMessageBody {
                 writer.write_all(b" :").await?;
                 writer.write_all(message.as_bytes()).await?;
             }
-            ServerMessageBody::N900LoggedIn { nick, address, account, message } => {
+            ServerMessageBody::N900LoggedIn {
+                nick,
+                address,
+                account,
+                message,
+            } => {
                 writer.write_all(b"900 ").await?;
                 writer.write_all(nick.as_bytes()).await?;
                 writer.write_all(b" ").await?;
@@ -404,7 +430,7 @@ fn server_message_body(input: &str) -> IResult<&str, ServerMessageBody> {
         server_message_body_notice,
         server_message_body_ping,
         server_message_body_pong,
-        server_message_body_cap
+        server_message_body_cap,
     ))(input)
 }
 
@@ -467,9 +493,10 @@ fn server_message_body_cap(input: &str) -> IResult<&str, ServerMessageBody> {
 mod test {
     use assert_matches::*;
 
-    use super::*;
     use crate::testkit::*;
 
+    use super::*;
+
     #[test]
     fn test_server_message_notice() {
         let input = "NOTICE * :*** Looking up your hostname...\r\n";

crates/proto-xmpp/src/bind.rs

@@ -11,12 +11,15 @@ pub const XMLNS: &'static str = "urn:ietf:params:xml:ns:xmpp-bind";
 
 // TODO remove `pub` in newtypes, introduce validation
 
+/// Name (node identifier) of an XMPP entity. Placed before the `@` in a JID.
 #[derive(PartialEq, Eq, Debug, Clone)]
 pub struct Name(pub Str);
 
+/// Server name of an XMPP entity. Placed after the `@` and before the `/` in a JID.
 #[derive(PartialEq, Eq, Debug, Clone)]
 pub struct Server(pub Str);
 
+/// Resource of an XMPP entity. Placed after the `/` in a JID.
 #[derive(PartialEq, Eq, Debug, Clone)]
 pub struct Resource(pub Str);
 
@@ -42,27 +45,20 @@ impl Display for Jid {
 
 impl Jid {
     pub fn from_string(i: &str) -> Result<Jid> {
-        use regex::Regex;
         use lazy_static::lazy_static;
+        use regex::Regex;
         lazy_static! {
-            static ref RE: Regex = Regex::new(r"^(([a-zA-Z]+)@)?([a-zA-Z.]+)(/([a-zA-Z\-]+))?$").unwrap();
+            static ref RE: Regex =
+                Regex::new(r"^(([a-zA-Z0-9]+)@)?([^@/]+)(/([a-zA-Z0-9\-]+))?$").expect("this is a correct regex");
         }
-        let m = RE
+        let m = RE.captures(i).ok_or(anyhow!("Incorrectly format jid: {i}"))?;
-            .captures(i)
-            .ok_or(anyhow!("Incorrectly format jid: {i}"))?;
 
         let name = m.get(2).map(|name| Name(name.as_str().into()));
         let server = m.get(3).unwrap();
         let server = Server(server.as_str().into());
-        let resource = m
+        let resource = m.get(5).map(|resource| Resource(resource.as_str().into()));
-            .get(5)
-            .map(|resource| Resource(resource.as_str().into()));
 
-        Ok(Jid {
+        Ok(Jid { name, server, resource })
-            name,
-            server,
-            resource,
-        })
     }
 }
 
@@ -79,15 +75,16 @@ impl Jid {
 pub struct BindRequest(pub Resource);
 
 impl FromXmlTag for BindRequest {
-    const NS: &'static str = XMLNS;
     const NAME: &'static str = "bind";
+    const NS: &'static str = XMLNS;
 }
 
 impl FromXml for BindRequest {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut resource: Option<Str> = None;
             let Event::Start(bytes) = event else {
                 return Err(anyhow!("Unexpected XML event: {event:?}"));
@@ -102,15 +99,15 @@ impl FromXml for BindRequest {
                 return Err(anyhow!("Incorrect namespace"));
             }
             loop {
-                let (namespace, event) = yield;
+                (namespace, event) = yield;
                 match event {
                     Event::Start(bytes) if bytes.name().0 == b"resource" => {
-                        let (namespace, event) = yield;
+                        (namespace, event) = yield;
                         let Event::Text(text) = event else {
                             return Err(anyhow!("Unexpected XML event: {event:?}"));
                         };
                         resource = Some(std::str::from_utf8(&*text)?.into());
-                        let (namespace, event) = yield;
+                        (namespace, event) = yield;
                         let Event::End(bytes) = event else {
                             return Err(anyhow!("Unexpected XML event: {event:?}"));
                         };
@@ -132,13 +129,15 @@ impl FromXml for BindRequest {
     }
 }
 
+#[derive(PartialEq, Eq, Debug)]
 pub struct BindResponse(pub Jid);
 
 impl ToXml for BindResponse {
     fn serialize(&self, events: &mut Vec<Event<'static>>) {
         events.extend_from_slice(&[
-            Event::Start(BytesStart::new(
+            Event::Start(BytesStart::from_content(
                 r#"bind xmlns="urn:ietf:params:xml:ns:xmpp-bind""#,
+                4,
             )),
             Event::Start(BytesStart::new(r#"jid"#)),
             Event::Text(BytesText::new(self.0.to_string().as_str()).into_owned()),
@@ -155,77 +154,74 @@ mod tests {
     use super::*;
 
     #[tokio::test]
-    async fn parse_message() {
+    async fn parse_message() -> Result<()> {
-        let input =
+        let input = r#"<bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><resource>mobile</resource></bind>"#;
-            r#"<bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><resource>mobile</resource></bind>"#;
         let mut reader = NsReader::from_reader(input.as_bytes());
         let mut buf = vec![];
-        let (ns, event) = reader
+        let (ns, event) = reader.read_resolved_event_into_async(&mut buf).await?;
-            .read_resolved_event_into_async(&mut buf)
-            .await
-            .unwrap();
         let mut parser = BindRequest::parse().consume(ns, &event);
         let result = loop {
             match parser {
                 Continuation::Final(res) => break res,
                 Continuation::Continue(next) => {
-                    let (ns, event) = reader
+                    let (ns, event) = reader.read_resolved_event_into_async(&mut buf).await?;
-                        .read_resolved_event_into_async(&mut buf)
-                        .await
-                        .unwrap();
                     parser = next.consume(ns, &event);
                 }
             }
-        }
+        }?;
-        .unwrap();
+        assert_eq!(result, BindRequest(Resource("mobile".into())));
-        assert_eq!(result, BindRequest(Resource("mobile".into())),)
+        Ok(())
     }
 
     #[test]
-    fn jid_parse_full() {
+    fn jid_parse_full() -> Result<()> {
         let input = "chelik@server.example/kek";
         let expected = Jid {
             name: Some(Name("chelik".into())),
             server: Server("server.example".into()),
             resource: Some(Resource("kek".into())),
         };
-        let res = Jid::from_string(input).unwrap();
+        let res = Jid::from_string(input)?;
         assert_eq!(res, expected);
+        Ok(())
     }
 
     #[test]
-    fn jid_parse_user() {
+    fn jid_parse_user() -> Result<()> {
         let input = "chelik@server.example";
         let expected = Jid {
             name: Some(Name("chelik".into())),
             server: Server("server.example".into()),
             resource: None,
         };
-        let res = Jid::from_string(input).unwrap();
+        let res = Jid::from_string(input)?;
         assert_eq!(res, expected);
+        Ok(())
     }
 
     #[test]
-    fn jid_parse_server() {
+    fn jid_parse_server() -> Result<()> {
         let input = "server.example";
         let expected = Jid {
             name: None,
             server: Server("server.example".into()),
             resource: None,
         };
-        let res = Jid::from_string(input).unwrap();
+        let res = Jid::from_string(input)?;
         assert_eq!(res, expected);
+        Ok(())
     }
 
     #[test]
-    fn jid_parse_server_resource() {
+    fn jid_parse_server_resource() -> Result<()> {
         let input = "server.example/kek";
         let expected = Jid {
             name: None,
             server: Server("server.example".into()),
             resource: Some(Resource("kek".into())),
         };
-        let res = Jid::from_string(input).unwrap();
+        let res = Jid::from_string(input)?;
         assert_eq!(res, expected);
+        Ok(())
     }
 }

crates/proto-xmpp/src/client.rs

@@ -20,8 +20,8 @@ pub struct Message<T> {
     // default is Normal
     pub r#type: MessageType,
     pub lang: Option<Str>,
-    pub subject: Option<Str>,
+    pub subject: Option<Subject>,
-    pub body: Str,
+    pub body: Option<Str>,
     pub custom: Vec<T>,
 }
 
@@ -38,6 +38,20 @@ impl<T: FromXml> FromXml for Message<T> {
     }
 }
 
+#[derive(PartialEq, Eq, Debug)]
+pub struct Subject(pub Option<Str>);
+impl ToXml for Subject {
+    fn serialize(&self, events: &mut Vec<Event<'static>>) {
+        if let Some(ref s) = self.0 {
+            events.push(Event::Start(BytesStart::new("subject")));
+            events.push(Event::Text(BytesText::new(s).into_owned()));
+            events.push(Event::End(BytesEnd::new("subject")));
+        } else {
+            events.push(Event::Empty(BytesStart::new("subject")));
+        }
+    }
+}
+
 #[derive(From)]
 struct MessageParser<T: FromXml>(MessageParserInner<T>);
 
@@ -57,7 +71,7 @@ struct MessageParserState<T> {
     to: Option<Jid>,
     r#type: MessageType,
     lang: Option<Str>,
-    subject: Option<Str>,
+    subject: Option<Subject>,
     body: Option<Str>,
     custom: Vec<T>,
 }
@@ -121,22 +135,16 @@ impl<T: FromXml> Parser for MessageParser<T> {
                         }
                     }
                 }
-                Event::End(_) => {
+                Event::End(_) => Continuation::Final(Ok(Message {
-                    if let Some(body) = state.body {
+                    from: state.from,
-                        Continuation::Final(Ok(Message {
+                    id: state.id,
-                            from: state.from,
+                    to: state.to,
-                            id: state.id,
+                    r#type: state.r#type,
-                            to: state.to,
+                    lang: state.lang,
-                            r#type: state.r#type,
+                    subject: state.subject,
-                            lang: state.lang,
+                    body: state.body,
-                            subject: state.subject,
+                    custom: state.custom,
-                            body,
+                })),
-                            custom: state.custom,
-                        }))
-                    } else {
-                        Continuation::Final(Err(ffail!("Body not found")))
-                    }
-                }
                 Event::Empty(_) => {
                     let parser = T::parse();
                     match parser.consume(namespace, event) {
@@ -153,7 +161,7 @@ impl<T: FromXml> Parser for MessageParser<T> {
             InSubject(mut state) => match event {
                 Event::Text(ref bytes) => {
                     let subject = fail_fast!(std::str::from_utf8(&*bytes));
-                    state.subject = Some(subject.into());
+                    state.subject = Some(Subject(Some(subject.into())));
                     Continuation::Continue(InSubject(state).into())
                 }
                 Event::End(_) => Continuation::Continue(Outer(state).into()),
@@ -208,9 +216,14 @@ impl<T: ToXml> ToXml for Message<T> {
             value: self.r#type.as_str().as_bytes().into(),
         });
         events.push(Event::Start(bytes));
-        events.push(Event::Start(BytesStart::new("body")));
+        if let Some(subject) = &self.subject {
-        events.push(Event::Text(BytesText::new(&self.body).into_owned()));
+            subject.serialize(events);
-        events.push(Event::End(BytesEnd::new("body")));
+        }
+        if let Some(body) = &self.body {
+            events.push(Event::Start(BytesStart::new("body")));
+            events.push(Event::Text(BytesText::new(body).into_owned()));
+            events.push(Event::End(BytesEnd::new("body")));
+        }
         events.push(Event::End(BytesEnd::new("message")));
     }
 }
@@ -255,11 +268,72 @@ impl MessageType {
     }
 }
 
+/// Error response to an IQ request.
+///
+/// https://xmpp.org/rfcs/rfc6120.html#stanzas-error
+pub struct IqError {
+    pub r#type: IqErrorType,
+    pub condition: Option<IqErrorCondition>,
+}
+
+pub enum IqErrorCondition {
+    ItemNotFound,
+}
+impl IqErrorCondition {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            IqErrorCondition::ItemNotFound => "item-not-found",
+        }
+    }
+}
+
+pub enum IqErrorType {
+    /// Retry after providing credentials
+    Auth,
+    /// Do not retry (the error cannot be remedied)
+    Cancel,
+    /// Proceed (the condition was only a warning)
+    Continue,
+    /// Retry after changing the data sent
+    Modify,
+    /// Retry after waiting (the error is temporary)
+    Wait,
+}
+impl IqErrorType {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            IqErrorType::Auth => "auth",
+            IqErrorType::Cancel => "cancel",
+            IqErrorType::Continue => "continue",
+            IqErrorType::Modify => "modify",
+            IqErrorType::Wait => "wait",
+        }
+    }
+}
+
+impl ToXml for IqError {
+    fn serialize(&self, events: &mut Vec<Event<'static>>) {
+        let bytes = BytesStart::new(format!(r#"error xmlns="{}" type="{}""#, XMLNS, self.r#type.as_str()));
+        match self.condition {
+            None => {
+                events.push(Event::Empty(bytes));
+            }
+            Some(IqErrorCondition::ItemNotFound) => {
+                events.push(Event::Start(bytes));
+                let bytes2 = BytesStart::new(r#"item-not-found xmlns="urn:ietf:params:xml:ns:xmpp-stanzas""#);
+                events.push(Event::Empty(bytes2));
+                let bytes = BytesEnd::new("error");
+                events.push(Event::End(bytes));
+            }
+        }
+    }
+}
+
 #[derive(PartialEq, Eq, Debug)]
 pub struct Iq<T> {
-    pub from: Option<String>,
+    pub from: Option<Jid>,
     pub id: String,
-    pub to: Option<String>,
+    pub to: Option<Jid>,
     pub r#type: IqType,
     pub body: T,
 }
@@ -285,9 +359,9 @@ enum IqParserInner<T: FromXml> {
     Final(IqParserState<T>),
 }
 struct IqParserState<T> {
-    pub from: Option<String>,
+    pub from: Option<Jid>,
     pub id: Option<String>,
-    pub to: Option<String>,
+    pub to: Option<Jid>,
     pub r#type: Option<IqType>,
     pub body: Option<T>,
 }
@@ -310,13 +384,15 @@ impl<T: FromXml> Parser for IqParser<T> {
                         let attr = fail_fast!(attr);
                         if attr.key.0 == b"from" {
                             let value = fail_fast!(std::str::from_utf8(&*attr.value));
-                            state.from = Some(value.to_string())
+                            let value = fail_fast!(Jid::from_string(value));
+                            state.from = Some(value)
                         } else if attr.key.0 == b"id" {
                             let value = fail_fast!(std::str::from_utf8(&*attr.value));
                             state.id = Some(value.to_string())
                         } else if attr.key.0 == b"to" {
                             let value = fail_fast!(std::str::from_utf8(&*attr.value));
-                            state.to = Some(value.to_string())
+                            let value = fail_fast!(Jid::from_string(value));
+                            state.to = Some(value)
                         } else if attr.key.0 == b"type" {
                             let value = fail_fast!(IqType::from_str(&*attr.value));
                             state.r#type = Some(value);
@@ -338,7 +414,7 @@ impl<T: FromXml> Parser for IqParser<T> {
                 }
             },
             IqParserInner::Final(state) => {
-                if let Event::End(ref bytes) = event {
+                if let Event::End(_) = event {
                     let id = fail_fast!(state.id.ok_or_else(|| ffail!("No id provided")));
                     let r#type = fail_fast!(state.r#type.ok_or_else(|| ffail!("No type provided")));
                     let body = fail_fast!(state.body.ok_or_else(|| ffail!("No body provided")));
@@ -393,15 +469,17 @@ impl<T: ToXml> ToXml for Iq<T> {
         let mut start = BytesStart::new(start);
         let mut attrs = vec![];
         if let Some(ref from) = self.from {
+            let value = from.to_string().into_bytes();
             attrs.push(Attribute {
                 key: QName(b"from"),
-                value: from.as_bytes().into(),
+                value: value.into(),
             });
         };
         if let Some(ref to) = self.to {
+            let value = to.to_string().into_bytes();
             attrs.push(Attribute {
                 key: QName(b"to"),
-                value: to.as_bytes().into(),
+                value: value.into(),
             });
         }
         attrs.push(Attribute {
@@ -422,6 +500,7 @@ impl<T: ToXml> ToXml for Iq<T> {
 
 #[derive(PartialEq, Eq, Debug)]
 pub struct Presence<T> {
+    pub id: Option<String>,
     pub to: Option<Jid>,
     pub from: Option<Jid>,
     pub priority: Option<PresencePriority>,
@@ -434,6 +513,7 @@ pub struct Presence<T> {
 impl<T> Default for Presence<T> {
     fn default() -> Self {
         Self {
+            id: Default::default(),
             to: Default::default(),
             from: Default::default(),
             priority: Default::default(),
@@ -486,7 +566,8 @@ impl<T: FromXml> FromXml for Presence<T> {
     type P = impl Parser<Output = Result<Presence<T>>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let (bytes, end) = match event {
                 Event::Start(bytes) => (bytes, false),
                 Event::Empty(bytes) => (bytes, true),
@@ -508,6 +589,10 @@ impl<T: FromXml> FromXml for Presence<T> {
                         let s = std::str::from_utf8(&attr.value)?;
                         p.r#type = Some(s.into());
                     }
+                    b"id" => {
+                        let s = std::str::from_utf8(&attr.value)?;
+                        p.id = Option::from(s.to_string());
+                    }
                     _ => {}
                 }
             }
@@ -515,37 +600,37 @@ impl<T: FromXml> FromXml for Presence<T> {
                 return Ok(p);
             }
             loop {
-                let (namespace, event) = yield;
+                (namespace, event) = yield;
                 match event {
                     Event::Start(bytes) => match bytes.name().0 {
                         b"show" => {
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::Text(bytes) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
                             let i = PresenceShow::from_str(bytes)?;
                             p.show = Some(i);
 
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::End(_) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
                         }
                         b"status" => {
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::Text(bytes) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
                             let s = std::str::from_utf8(bytes)?;
                             p.status.push(s.to_string());
 
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::End(_) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
                         }
                         b"priority" => {
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::Text(bytes) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
@@ -553,7 +638,7 @@ impl<T: FromXml> FromXml for Presence<T> {
                             let i = s.parse()?;
                             p.priority = Some(PresencePriority(i));
 
-                            let (_, event) = yield;
+                            (namespace, event) = yield;
                             let Event::End(_) = event else {
                                 return Err(ffail!("Unexpected XML event: {event:?}"));
                             };
@@ -595,6 +680,12 @@ impl<T: ToXml> ToXml for Presence<T> {
                 value: from.to_string().as_bytes().into(),
             }]);
         }
+        if let Some(ref id) = self.id {
+            start.extend_attributes([Attribute {
+                key: QName(b"id"),
+                value: id.to_string().as_bytes().into(),
+            }]);
+        }
         events.push(Event::Start(start));
         if let Some(ref priority) = self.priority {
             let s = priority.0.to_string();
@@ -604,6 +695,9 @@ impl<T: ToXml> ToXml for Presence<T> {
                 Event::End(BytesEnd::new("priority")),
             ]);
         }
+        for c in &self.custom {
+            c.serialize(events);
+        }
         events.push(Event::End(BytesEnd::new("presence")));
     }
 }
@@ -616,7 +710,7 @@ mod tests {
 
     #[tokio::test]
     async fn parse_message() {
-        let input = r#"<message id="aacea" type="chat" to="nikita@vlnv.dev"><subject>daa</subject><body>bbb</body><unknown-stuff></unknown-stuff></message>"#;
+        let input = r#"<message id="aacea" type="chat" to="chelik@example.com"><subject>daa</subject><body>bbb</body><unknown-stuff></unknown-stuff></message>"#;
         let result: Message<Ignore> = crate::xml::parse(input).unwrap();
         assert_eq!(
             result,
@@ -624,14 +718,14 @@ mod tests {
                 from: None,
                 id: Some("aacea".to_string()),
                 to: Some(Jid {
-                    name: Some(Name("nikita".into())),
+                    name: Some(Name("chelik".into())),
-                    server: Server("vlnv.dev".into()),
+                    server: Server("example.com".into()),
                     resource: None
                 }),
                 r#type: MessageType::Chat,
                 lang: None,
-                subject: Some("daa".into()),
+                subject: Some(Subject(Some("daa".into()))),
-                body: "bbb".into(),
+                body: Some("bbb".into()),
                 custom: vec![Ignore],
             }
         )
@@ -639,7 +733,7 @@ mod tests {
 
     #[tokio::test]
     async fn parse_message_empty_custom() {
-        let input = r#"<message id="aacea" type="chat" to="nikita@vlnv.dev"><subject>daa</subject><body>bbb</body><unknown-stuff/></message>"#;
+        let input = r#"<message id="aacea" type="chat" to="chelik@example.com"><subject>daa</subject><body>bbb</body><unknown-stuff/></message>"#;
         let result: Message<Ignore> = crate::xml::parse(input).unwrap();
         assert_eq!(
             result,
@@ -647,14 +741,14 @@ mod tests {
                 from: None,
                 id: Some("aacea".to_string()),
                 to: Some(Jid {
-                    name: Some(Name("nikita".into())),
+                    name: Some(Name("chelik".into())),
-                    server: Server("vlnv.dev".into()),
+                    server: Server("example.com".into()),
                     resource: None
                 }),
                 r#type: MessageType::Chat,
                 lang: None,
-                subject: Some("daa".into()),
+                subject: Some(Subject(Some("daa".into()))),
-                body: "bbb".into(),
+                body: Some("bbb".into()),
                 custom: vec![Ignore],
             }
         )

crates/proto-xmpp/src/disco.rs

@@ -2,8 +2,8 @@ use quick_xml::events::attributes::Attribute;
 use quick_xml::events::{BytesEnd, BytesStart, Event};
 use quick_xml::name::{QName, ResolveResult};
 
-use anyhow::{Result, anyhow as ffail};
 use crate::xml::*;
+use anyhow::{anyhow as ffail, Result};
 
 use super::bind::Jid;
 
@@ -21,7 +21,8 @@ impl FromXml for InfoQuery {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut node = None;
             let mut identity = vec![];
             let mut feature = vec![];
@@ -48,7 +49,7 @@ impl FromXml for InfoQuery {
                 });
             }
             loop {
-                let (namespace, event) = yield;
+                (namespace, event) = yield;
                 let bytes = match event {
                     Event::Start(bytes) => bytes,
                     Event::Empty(bytes) => bytes,
@@ -141,7 +142,8 @@ impl FromXml for Identity {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut category = None;
             let mut name = None;
             let mut r#type = None;
@@ -174,17 +176,13 @@ impl FromXml for Identity {
             let Some(r#type) = r#type else {
                 return Err(ffail!("No type provided"));
             };
-            let item = Identity {
+            let item = Identity { category, name, r#type };
-                category,
-                name,
-                r#type,
-            };
             if end {
                 return Ok(item);
             }
 
-            let (namespace, event) = yield;
+            (namespace, event) = yield;
-            let Event::End(bytes) = event else {
+            let Event::End(_) = event else {
                 return Err(ffail!("Unexpected XML event: {event:?}"));
             };
             Ok(item)
@@ -213,7 +211,8 @@ impl FromXml for Feature {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut var = None;
             let (bytes, end) = match event {
                 Event::Start(bytes) => (bytes, false),
@@ -238,8 +237,8 @@ impl FromXml for Feature {
                 return Ok(item);
             }
 
-            let (namespace, event) = yield;
+            (namespace, event) = yield;
-            let Event::End(bytes) = event else {
+            let Event::End(_) = event else {
                 return Err(ffail!("Unexpected XML event: {event:?}"));
             };
             Ok(item)
@@ -262,9 +261,10 @@ impl FromXml for ItemQuery {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut item = vec![];
-            let (bytes, end) = match event {
+            let (_, end) = match event {
                 Event::Start(bytes) => (bytes, false),
                 Event::Empty(bytes) => (bytes, true),
                 _ => return Err(ffail!("Unexpected XML event: {event:?}")),
@@ -273,7 +273,7 @@ impl FromXml for ItemQuery {
                 return Ok(ItemQuery { item });
             }
             loop {
-                let (namespace, event) = yield;
+                (namespace, event) = yield;
                 let bytes = match event {
                     Event::Start(bytes) => bytes,
                     Event::Empty(bytes) => bytes,
@@ -300,7 +300,7 @@ impl FromXmlTag for ItemQuery {
 
 impl ToXml for ItemQuery {
     fn serialize(&self, events: &mut Vec<Event<'static>>) {
-        let mut bytes = BytesStart::new(format!(r#"query xmlns="{}""#, XMLNS_ITEM));
+        let bytes = BytesStart::new(format!(r#"query xmlns="{}""#, XMLNS_ITEM));
         let empty = self.item.is_empty();
         if empty {
             events.push(Event::Empty(bytes));
@@ -346,7 +346,8 @@ impl FromXml for Item {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(_, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut jid = None;
             let mut name = None;
             let mut node = None;
@@ -382,8 +383,8 @@ impl FromXml for Item {
                 return Ok(item);
             }
 
-            let (namespace, event) = yield;
+            (_, event) = yield;
-            let Event::End(bytes) = event else {
+            let Event::End(_) = event else {
                 return Err(ffail!("Unexpected XML event: {event:?}"));
             };
             Ok(item)

crates/proto-xmpp/src/lib.rs

@@ -1,23 +1,23 @@
-#![feature(
+#![feature(coroutines, coroutine_trait, type_alias_impl_trait, impl_trait_in_assoc_type)]
-    coroutines,
-    coroutine_trait,
-    type_alias_impl_trait,
-    impl_trait_in_assoc_type
-)]
 
 pub mod bind;
 pub mod client;
 pub mod disco;
+pub mod mam;
 pub mod muc;
+mod prelude;
 pub mod roster;
 pub mod sasl;
 pub mod session;
 pub mod stanzaerror;
 pub mod stream;
+pub mod streamerror;
 pub mod tls;
-mod prelude;
 pub mod xml;
 
+#[cfg(test)]
+mod testkit;
+
 // Implemented as a macro instead of a fn due to borrowck limitations
 macro_rules! skip_text {
     ($reader: ident, $buf: ident) => {

crates/proto-xmpp/src/mam.rs

@@ -0,0 +1,226 @@
+use anyhow::{anyhow, Result};
+use quick_xml::events::{BytesEnd, BytesStart, BytesText, Event};
+use quick_xml::name::{Namespace, ResolveResult};
+
+use crate::xml::*;
+
+pub const MAM_XMLNS: &'static str = "urn:xmpp:mam:2";
+pub const DATA_XMLNS: &'static str = "jabber:x:data";
+pub const RESULT_SET_XMLNS: &'static str = "http://jabber.org/protocol/rsm";
+
+#[derive(PartialEq, Eq, Debug, Clone)]
+pub struct MessageArchiveRequest {
+    pub x: Option<X>,
+}
+
+#[derive(PartialEq, Eq, Debug, Clone)]
+pub struct X {
+    pub fields: Vec<Field>,
+}
+
+#[derive(PartialEq, Eq, Debug, Clone)]
+pub struct Field {
+    pub values: Vec<String>,
+}
+
+// Message archive response styled as a result set.
+#[derive(PartialEq, Eq, Debug, Clone)]
+pub struct Fin {
+    pub set: Set,
+}
+
+#[derive(PartialEq, Eq, Debug, Clone)]
+pub struct Set {
+    pub count: Option<i32>,
+}
+
+impl ToXml for Fin {
+    fn serialize(&self, events: &mut Vec<Event<'static>>) {
+        let fin_bytes = BytesStart::new(format!(r#"fin xmlns="{}" complete=True"#, MAM_XMLNS));
+        let set_bytes = BytesStart::new(format!(r#"set xmlns="{}""#, RESULT_SET_XMLNS));
+        events.push(Event::Start(fin_bytes));
+        events.push(Event::Start(set_bytes));
+
+        if let &Some(count) = &self.set.count {
+            events.push(Event::Start(BytesStart::new("count")));
+            events.push(Event::Text(BytesText::new(count.to_string().as_str()).into_owned()));
+            events.push(Event::End(BytesEnd::new("count")));
+        }
+        events.push(Event::End(BytesEnd::new("set")));
+        events.push(Event::End(BytesEnd::new("fin")));
+    }
+}
+
+impl FromXmlTag for X {
+    const NAME: &'static str = "x";
+    const NS: &'static str = DATA_XMLNS;
+}
+
+impl FromXmlTag for MessageArchiveRequest {
+    const NAME: &'static str = "query";
+    const NS: &'static str = MAM_XMLNS;
+}
+
+impl FromXml for X {
+    type P = impl Parser<Output = Result<Self>>;
+
+    fn parse() -> Self::P {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+            println!("X::parse {:?}", event);
+
+            let bytes = match event {
+                Event::Start(bytes) if bytes.name().0 == X::NAME.as_bytes() => bytes,
+                Event::Empty(bytes) if bytes.name().0 == X::NAME.as_bytes() => return Ok(X { fields: vec![] }),
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            };
+            let mut fields = vec![];
+            loop {
+                (namespace, event) = yield;
+                match event {
+                    Event::Start(_) => {
+                        // start of <field>
+                        let mut values = vec![];
+                        loop {
+                            (namespace, event) = yield;
+                            match event {
+                                Event::Start(bytes) if bytes.name().0 == b"value" => {
+                                    // start of <value>
+                                }
+                                Event::End(bytes) if bytes.name().0 == b"field" => {
+                                    // end of </field>
+                                    break;
+                                }
+                                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+                            }
+                            (namespace, event) = yield;
+                            let text: String = match event {
+                                Event::Text(bytes) => {
+                                    // text inside <value></value>
+                                    String::from_utf8(bytes.to_vec())?
+                                }
+                                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+                            };
+                            (namespace, event) = yield;
+                            match event {
+                                Event::End(bytes) if bytes.name().0 == b"value" => {
+                                    // end of </value>
+                                }
+                                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+                            }
+                            values.push(text);
+                        }
+                        fields.push(Field { values })
+                    }
+                    Event::End(bytes) if bytes.name().0 == X::NAME.as_bytes() => {
+                        // end of <x/>
+                        return Ok(X { fields });
+                    }
+                    _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+                }
+            }
+        }
+    }
+}
+
+impl FromXml for MessageArchiveRequest {
+    type P = impl Parser<Output = Result<Self>>;
+
+    fn parse() -> Self::P {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+            println!("MessageArchiveRequest::parse {:?}", event);
+
+            let bytes = match event {
+                Event::Empty(_) => return Ok(MessageArchiveRequest { x: None }),
+                Event::Start(bytes) => bytes,
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            };
+            if bytes.name().0 != MessageArchiveRequest::NAME.as_bytes() {
+                return Err(anyhow!("Unexpected XML tag: {:?}", bytes.name()));
+            }
+            let ResolveResult::Bound(Namespace(ns)) = namespace else {
+                return Err(anyhow!("No namespace provided"));
+            };
+            if ns != MAM_XMLNS.as_bytes() {
+                return Err(anyhow!("Incorrect namespace"));
+            }
+            (namespace, event) = yield;
+            match event {
+                Event::End(bytes) if bytes.name().0 == MessageArchiveRequest::NAME.as_bytes() => {
+                    Ok(MessageArchiveRequest { x: None })
+                }
+                Event::Start(bytes) | Event::Empty(bytes) if bytes.name().0 == X::NAME.as_bytes() => {
+                    let x = delegate_parsing!(X, namespace, event)?;
+                    Ok(MessageArchiveRequest { x: Some(x) })
+                }
+                _ => Err(anyhow!("Unexpected XML event: {event:?}")),
+            }
+        }
+    }
+}
+
+impl MessageArchiveRequest {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::bind::{Jid, Name, Server};
+    use crate::client::{Iq, IqType};
+
+    #[test]
+    fn test_parse_archive_query() {
+        let input = r#"<iq to='pubsub.shakespeare.lit' type='set' id='juliet1'><query xmlns='urn:xmpp:mam:2' queryid='f28'/></iq>"#;
+
+        let result: Iq<MessageArchiveRequest> = parse(input).unwrap();
+        assert_eq!(
+            result,
+            Iq {
+                from: None,
+                id: "juliet1".to_string(),
+                to: Option::from(Jid {
+                    name: None,
+                    server: Server("pubsub.shakespeare.lit".into()),
+                    resource: None,
+                }),
+                r#type: IqType::Set,
+                body: MessageArchiveRequest { x: None },
+            }
+        );
+    }
+
+    #[test]
+    fn test_parse_query_messages_from_jid() {
+        let input = r#"<iq type='set' id='juliet1'><query xmlns='urn:xmpp:mam:2'><x xmlns='jabber:x:data' type='submit'><field var='FORM_TYPE' type='hidden'><value>value1</value></field><field var='with'><value>juliet@capulet.lit</value></field></x></query></iq>"#;
+
+        let result: Iq<MessageArchiveRequest> = parse(input).unwrap();
+        assert_eq!(
+            result,
+            Iq {
+                from: None,
+                id: "juliet1".to_string(),
+                to: None,
+                r#type: IqType::Set,
+                body: MessageArchiveRequest {
+                    x: Some(X {
+                        fields: vec![
+                            Field {
+                                values: vec!["value1".to_string()],
+                            },
+                            Field {
+                                values: vec!["juliet@capulet.lit".to_string()],
+                            },
+                        ]
+                    })
+                },
+            }
+        );
+    }
+
+    #[test]
+    fn test_parse_query_messages_from_jid_with_unclosed_tag() {
+        let input = r#"<iq type='set' id='juliet1'><query xmlns='urn:xmpp:mam:2'><x xmlns='jabber:x:data' type='submit'><field var='FORM_TYPE' type='hidden'><value>value1</value></field><field var='with'><value>juliet@capulet.lit</value></field></query></iq>"#;
+
+        assert!(parse::<Iq<MessageArchiveRequest>>(input).is_err())
+    }
+}

crates/proto-xmpp/src/muc/mod.rs

@@ -1,12 +1,16 @@
 #![allow(unused_variables)]
 
-use quick_xml::events::Event;
-use quick_xml::name::ResolveResult;
-
-use crate::xml::*;
 use anyhow::{anyhow, Result};
+use quick_xml::events::attributes::Attribute;
+use quick_xml::events::{BytesEnd, BytesStart, BytesText, Event};
+use quick_xml::name::{QName, ResolveResult};
+
+use crate::bind::Jid;
+use crate::xml::*;
 
 pub const XMLNS: &'static str = "http://jabber.org/protocol/muc";
+pub const XMLNS_USER: &'static str = "http://jabber.org/protocol/muc#user";
+pub const XMLNS_DELAY: &'static str = "urn:xmpp:delay";
 
 #[derive(PartialEq, Eq, Debug, Default)]
 pub struct History {
@@ -19,7 +23,8 @@ impl FromXml for History {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut history = History::default();
             let (bytes, end) = match event {
                 Event::Start(bytes) if bytes.name().0 == Self::NAME.as_bytes() => (bytes, false),
@@ -51,7 +56,7 @@ impl FromXml for History {
                 return Ok(history);
             }
 
-            let (namespace, event) = yield;
+            (namespace, event) = yield;
             let Event::End(bytes) = event else {
                 return Err(anyhow!("Unexpected XML event: {event:?}"));
             };
@@ -73,17 +78,18 @@ impl FromXml for Password {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let bytes = match event {
                 Event::Start(bytes) if bytes.name().0 == Self::NAME.as_bytes() => bytes,
                 _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
             };
-            let (namespace, event) = yield;
+            (namespace, event) = yield;
             let Event::Text(bytes) = event else {
                 return Err(anyhow!("Unexpected XML event: {event:?}"));
             };
             let s = std::str::from_utf8(bytes)?.to_string();
-            let (namespace, event) = yield;
+            (namespace, event) = yield;
             let Event::End(bytes) = event else {
                 return Err(anyhow!("Unexpected XML event: {event:?}"));
             };
@@ -108,7 +114,8 @@ impl FromXml for X {
     type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        |(namespace, event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
             let mut res = X::default();
             let (_, end) = match event {
                 Event::Start(bytes) => (bytes, false),
@@ -120,7 +127,7 @@ impl FromXml for X {
             }
 
             loop {
-                let (namespace, event) = yield;
+                (namespace, event) = yield;
                 let bytes = match event {
                     Event::Start(bytes) => bytes,
                     Event::Empty(bytes) => bytes,
@@ -143,9 +150,191 @@ impl FromXml for X {
     }
 }
 
+/// Information about an MUC member. May contain [MUC status codes](https://xmpp.org/registrar/mucstatus.html).
+#[derive(Debug, PartialEq, Eq)]
+pub struct XUser {
+    pub item: XUserItem,
+    /// Code 110. The receiver is the user referred to in the presence stanza.
+    pub self_presence: bool,
+    /// Code 201. The room from which the presence stanza was sent was just created.
+    pub just_created: bool,
+}
+
+impl ToXml for XUser {
+    fn serialize(&self, output: &mut Vec<Event<'static>>) {
+        let mut tag = BytesStart::new("x");
+        tag.push_attribute(("xmlns", XMLNS_USER));
+        output.push(Event::Start(tag));
+        self.item.serialize(output);
+        if self.self_presence {
+            let mut meg = BytesStart::new("status");
+            meg.push_attribute(("code", "110"));
+            output.push(Event::Empty(meg));
+        }
+        if self.just_created {
+            let mut meg = BytesStart::new("status");
+            meg.push_attribute(("code", "201"));
+            output.push(Event::Empty(meg));
+        }
+        output.push(Event::End(BytesEnd::new("x")));
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct XUserItem {
+    pub affiliation: Affiliation,
+    pub jid: Jid,
+    pub role: Role,
+}
+
+impl ToXml for XUserItem {
+    fn serialize(&self, output: &mut Vec<Event<'static>>) {
+        let mut meg = BytesStart::new("item");
+        meg.push_attribute(("affiliation", self.affiliation.to_str()));
+        meg.push_attribute(("role", self.role.to_str()));
+        meg.push_attribute(("jid", self.jid.to_string().as_str()));
+        output.push(Event::Empty(meg));
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum Affiliation {
+    Owner,
+    Admin,
+    Member,
+    Outcast,
+    None,
+}
+
+impl Affiliation {
+    pub fn from_str(s: &str) -> Option<Self> {
+        match s {
+            "owner" => Some(Self::Owner),
+            "admin" => Some(Self::Admin),
+            "member" => Some(Self::Member),
+            "outcast" => Some(Self::Outcast),
+            "none" => Some(Self::None),
+            _ => None,
+        }
+    }
+
+    pub fn to_str(&self) -> &str {
+        match self {
+            Self::Owner => "owner",
+            Self::Admin => "admin",
+            Self::Member => "member",
+            Self::Outcast => "outcast",
+            Self::None => "none",
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum Role {
+    Moderator,
+    Participant,
+    Visitor,
+    None,
+}
+
+impl Role {
+    pub fn from_str(s: &str) -> Option<Self> {
+        match s {
+            "moderator" => Some(Self::Moderator),
+            "participant" => Some(Self::Participant),
+            "visitor" => Some(Self::Visitor),
+            "none" => Some(Self::None),
+            _ => None,
+        }
+    }
+
+    pub fn to_str(&self) -> &str {
+        match self {
+            Self::Moderator => "moderator",
+            Self::Participant => "participant",
+            Self::Visitor => "visitor",
+            Self::None => "none",
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct Delay {
+    pub from: Jid,
+    pub stamp: String,
+}
+
+impl ToXml for Delay {
+    fn serialize(&self, events: &mut Vec<Event>) {
+        let mut tag = BytesStart::new("delay");
+        tag.push_attribute(Attribute {
+            key: QName(b"xmlns"),
+            value: XMLNS_DELAY.as_bytes().into(),
+        });
+        tag.push_attribute(Attribute {
+            key: QName(b"from"),
+            value: self.from.to_string().into_bytes().into(),
+        });
+        tag.push_attribute(Attribute {
+            key: QName(b"stamp"),
+            value: self.stamp.as_bytes().into(),
+        });
+        events.push(Event::Empty(tag));
+    }
+}
+
+/// Message-stanza of a historic message.
+///
+/// Example:
+/// ```xml
+/// <message from="duqedadi@conference.example.com/misha" xml:lang="en" to="misha@example.com/tux" type="groupchat" id="7ca7cb14-b2af-49c9-bd90-05dabb1113a5">
+///     <delay xmlns="urn:xmpp:delay" stamp="2024-05-17T16:05:28.440337Z" from="duqedadi@conference.example.com"/>
+///     <body></body>
+/// </message>
+/// ```
+#[derive(Debug, PartialEq, Eq)]
+pub struct XmppHistoryMessage {
+    pub id: String,
+    pub to: Jid,
+    pub from: Jid,
+    pub delay: Delay,
+    pub body: String,
+}
+
+impl ToXml for XmppHistoryMessage {
+    fn serialize(&self, events: &mut Vec<Event<'static>>) {
+        let mut message_tag = BytesStart::new("message");
+        message_tag.push_attribute(Attribute {
+            key: QName(b"id"),
+            value: self.id.as_str().as_bytes().into(),
+        });
+        message_tag.push_attribute(Attribute {
+            key: QName(b"to"),
+            value: self.to.to_string().into_bytes().into(),
+        });
+        message_tag.push_attribute(Attribute {
+            key: QName(b"from"),
+            value: self.from.to_string().into_bytes().into(),
+        });
+        message_tag.push_attribute(Attribute {
+            key: QName(b"type"),
+            value: b"groupchat".into(),
+        });
+        events.push(Event::Start(message_tag));
+        self.delay.serialize(events);
+        let body_tag = BytesStart::new("body");
+        events.push(Event::Start(body_tag));
+        events.push(Event::Text(BytesText::new(self.body.to_string().as_str()).into_owned()));
+        events.push(Event::End(BytesEnd::new("body")));
+        events.push(Event::End(BytesEnd::new("message")));
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
+    use crate::bind::{Name, Resource, Server};
+    use crate::testkit::assemble_string_from_event_flow;
 
     #[test]
     fn test_history_success_empty() {
@@ -228,4 +417,40 @@ mod test {
         };
         assert_eq!(res, expected);
     }
+
+    #[test]
+    fn test_history_message_serialization() {
+        // Arrange
+        let history_message = XmppHistoryMessage {
+            id: "id".to_string(),
+            to: Jid {
+                name: Some(Name("sauer@example.com".into())),
+                server: Server("localhost".into()),
+                resource: Some(Resource("tester".into())),
+            },
+            from: Jid {
+                name: Some(Name("pepe".into())),
+                server: Server("rooms.localhost".into()),
+                resource: Some(Resource("sauer".into())),
+            },
+            delay: Delay {
+                from: Jid {
+                    name: Some(Name("pepe".into())),
+                    server: Server("rooms.localhost".into()),
+                    resource: Some(Resource("tester".into())),
+                },
+                stamp: "2021-10-10T10:10:10Z".to_string(),
+            },
+            body: "Hello World.".to_string(),
+        };
+        let mut events = vec![];
+        let expected = r#"<message id="id" to="sauer@example.com@localhost/tester" from="pepe@rooms.localhost/sauer" type="groupchat"><delay xmlns="urn:xmpp:delay" from="pepe@rooms.localhost/tester" stamp="2021-10-10T10:10:10Z"/><body>Hello World.</body></message>"#;
+
+        // Act
+        history_message.serialize(&mut events);
+        let flow = assemble_string_from_event_flow(&events);
+
+        // Assert
+        assert_eq!(flow, expected);
+    }
 }

crates/proto-xmpp/src/roster.rs

@@ -1,47 +1,34 @@
 use quick_xml::events::{BytesStart, Event};
 
 use crate::xml::*;
-use anyhow::{anyhow as ffail, Result};
+use anyhow::{anyhow, Result};
+use quick_xml::name::{Namespace, ResolveResult};
 
 pub const XMLNS: &'static str = "jabber:iq:roster";
 
 #[derive(PartialEq, Eq, Debug)]
 pub struct RosterQuery;
 
-pub struct QueryParser(QueryParserInner);
-
-enum QueryParserInner {
-    Initial,
-    InQuery,
-}
-
-impl Parser for QueryParser {
-    type Output = Result<RosterQuery>;
-
-    fn consume<'a>(
-        self: Self,
-        namespace: quick_xml::name::ResolveResult,
-        event: &quick_xml::events::Event<'a>,
-    ) -> Continuation<Self, Self::Output> {
-        match self.0 {
-            QueryParserInner::Initial => match event {
-                Event::Start(_) => Continuation::Continue(QueryParser(QueryParserInner::InQuery)),
-                Event::Empty(_) => Continuation::Final(Ok(RosterQuery)),
-                _ => Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}"))),
-            },
-            QueryParserInner::InQuery => match event {
-                Event::End(_) => Continuation::Final(Ok(RosterQuery)),
-                _ => Continuation::Final(Err(ffail!("Unexpected XML event: {event:?}"))),
-            },
-        }
-    }
-}
-
 impl FromXml for RosterQuery {
-    type P = QueryParser;
+    type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        QueryParser(QueryParserInner::Initial)
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+            let ResolveResult::Bound(Namespace(ns)) = namespace else {
+                return Err(anyhow!("No namespace provided"));
+            };
+            match event {
+                Event::Start(_) => (),
+                Event::Empty(_) => return Ok(RosterQuery),
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            }
+            (namespace, event) = yield;
+            match event {
+                Event::End(_) => return Ok(RosterQuery),
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            }
+        }
     }
 }
 
@@ -52,9 +39,43 @@ impl FromXmlTag for RosterQuery {
 
 impl ToXml for RosterQuery {
     fn serialize(&self, events: &mut Vec<Event<'static>>) {
-        events.push(Event::Empty(BytesStart::new(format!(
+        events.push(Event::Empty(BytesStart::new(format!(r#"query xmlns="{}""#, XMLNS))));
-            r#"query xmlns="{}""#,
+    }
-            XMLNS
+}
-        ))));
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::bind::{Jid, Name, Resource, Server};
+    use crate::client::{Iq, IqType};
+
+    #[test]
+    fn test_parse() -> Result<()> {
+        let input =
+            r#"<iq from='juliet@example.com/balcony' id='bv1bs71f' type='get'><query xmlns='jabber:iq:roster'/></iq>"#;
+
+        let result: Iq<RosterQuery> = parse(input)?;
+        assert_eq!(
+            result,
+            Iq {
+                from: Option::from(Jid {
+                    name: Option::from(Name("juliet".into())),
+                    server: Server("example.com".into()),
+                    resource: Option::from(Resource("balcony".into())),
+                }),
+                id: "bv1bs71f".to_string(),
+                to: None,
+                r#type: IqType::Get,
+                body: RosterQuery,
+            }
+        );
+        Ok(())
+    }
+
+    #[test]
+    fn test_missing_namespace() {
+        let input = r#"<iq from='juliet@example.com/balcony' id='bv1bs71f' type='get'><query/></iq>"#;
+
+        assert!(parse::<Iq<RosterQuery>>(input).is_err());
     }
 }

crates/proto-xmpp/src/sasl.rs

@@ -1,7 +1,7 @@
 use std::borrow::Borrow;
 
 use anyhow::{anyhow, Result};
-use quick_xml::events::{BytesStart, Event};
+use quick_xml::events::{BytesEnd, BytesStart, Event};
 use quick_xml::{NsReader, Writer};
 use tokio::io::{AsyncBufRead, AsyncWrite};
 
@@ -74,3 +74,16 @@ impl Success {
         Ok(())
     }
 }
+
+pub struct Failure;
+impl Failure {
+    pub async fn write_xml(&self, writer: &mut Writer<impl AsyncWrite + Unpin>) -> Result<()> {
+        let event = BytesStart::new(r#"failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl""#);
+        writer.write_event_async(Event::Start(event)).await?;
+        let event = BytesStart::new(r#"not-authorized"#);
+        writer.write_event_async(Event::Empty(event)).await?;
+        let event = BytesEnd::new(r#"failure"#);
+        writer.write_event_async(Event::End(event)).await?;
+        Ok(())
+    }
+}

crates/proto-xmpp/src/session.rs

@@ -2,48 +2,30 @@ use quick_xml::events::{BytesStart, Event};
 
 use crate::xml::*;
 use anyhow::{anyhow, Result};
+use quick_xml::name::ResolveResult;
 
 pub const XMLNS: &'static str = "urn:ietf:params:xml:ns:xmpp-session";
 
 #[derive(PartialEq, Eq, Debug)]
 pub struct Session;
 
-pub struct SessionParser(SessionParserInner);
-
-enum SessionParserInner {
-    Initial,
-    InSession,
-}
-
-impl Parser for SessionParser {
-    type Output = Result<Session>;
-
-    fn consume<'a>(
-        self: Self,
-        namespace: quick_xml::name::ResolveResult,
-        event: &quick_xml::events::Event<'a>,
-    ) -> Continuation<Self, Self::Output> {
-        match self.0 {
-            SessionParserInner::Initial => match event {
-                Event::Start(_) => {
-                    Continuation::Continue(SessionParser(SessionParserInner::InSession))
-                }
-                Event::Empty(_) => Continuation::Final(Ok(Session)),
-                _ => Continuation::Final(Err(anyhow!("Unexpected XML event: {event:?}"))),
-            },
-            SessionParserInner::InSession => match event {
-                Event::End(_) => Continuation::Final(Ok(Session)),
-                _ => Continuation::Final(Err(anyhow!("Unexpected XML event: {event:?}"))),
-            },
-        }
-    }
-}
-
 impl FromXml for Session {
-    type P = SessionParser;
+    type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        SessionParser(SessionParserInner::Initial)
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+            match event {
+                Event::Start(_) => (),
+                Event::Empty(_) => return Ok(Session),
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            }
+            (namespace, event) = yield;
+            match event {
+                Event::End(_) => return Ok(Session),
+                _ => return Err(anyhow!("Unexpected XML event: {event:?}")),
+            }
+        }
     }
 }
 
@@ -54,9 +36,6 @@ impl FromXmlTag for Session {
 
 impl ToXml for Session {
     fn serialize(&self, events: &mut Vec<Event<'static>>) {
-        events.push(Event::Empty(BytesStart::new(format!(
+        events.push(Event::Empty(BytesStart::new(format!(r#"session xmlns="{}""#, XMLNS))));
-            r#"session xmlns="{}""#,
-            XMLNS
-        ))));
     }
 }

crates/proto-xmpp/src/stream.rs

@@ -6,8 +6,8 @@ use tokio::io::{AsyncBufRead, AsyncWrite};
 
 use super::skip_text;
 
-use anyhow::{anyhow, Result};
 use crate::xml::ToXml;
+use anyhow::{anyhow, Result};
 
 pub static XMLNS: &'static str = "http://etherx.jabber.org/streams";
 pub static PREFIX: &'static str = "stream";
@@ -24,7 +24,17 @@ impl ClientStreamStart {
         reader: &mut NsReader<impl AsyncBufRead + Unpin>,
         buf: &mut Vec<u8>,
     ) -> Result<ClientStreamStart> {
-        let incoming = skip_text!(reader, buf);
+        let mut incoming = skip_text!(reader, buf);
+        if let Event::Decl(bytes) = incoming {
+            // this is <?xml ...> header
+            if let Some(encoding) = bytes.encoding() {
+                let encoding = encoding?;
+                if &*encoding != b"UTF-8" {
+                    return Err(anyhow!("Unsupported encoding: {encoding:?}"));
+                }
+            }
+            incoming = skip_text!(reader, buf);
+        }
         if let Event::Start(e) = incoming {
             let (ns, local) = reader.resolve_element(e.name());
             if ns != ResolveResult::Bound(Namespace(XMLNS.as_bytes())) {
@@ -44,10 +54,7 @@ impl ClientStreamStart {
                         let value = attr.unescape_value()?;
                         to = Some(value.to_string());
                     }
-                    (
+                    (ResolveResult::Bound(Namespace(b"http://www.w3.org/XML/1998/namespace")), b"lang") => {
-                        ResolveResult::Bound(Namespace(b"http://www.w3.org/XML/1998/namespace")),
-                        b"lang",
-                    ) => {
                         let value = attr.unescape_value()?;
                         lang = Some(value.to_string());
                     }
@@ -124,21 +131,15 @@ pub struct Features {
 }
 impl Features {
     pub async fn write_xml(&self, writer: &mut Writer<impl AsyncWrite + Unpin>) -> Result<()> {
-        writer
+        writer.write_event_async(Event::Start(BytesStart::new("stream:features"))).await?;
-            .write_event_async(Event::Start(BytesStart::new("stream:features")))
-            .await?;
         if self.start_tls {
             writer
                 .write_event_async(Event::Start(BytesStart::new(
                     r#"starttls  xmlns="urn:ietf:params:xml:ns:xmpp-tls""#,
                 )))
                 .await?;
-            writer
+            writer.write_event_async(Event::Empty(BytesStart::new("required"))).await?;
-                .write_event_async(Event::Empty(BytesStart::new("required")))
+            writer.write_event_async(Event::End(BytesEnd::new("starttls"))).await?;
-                .await?;
-            writer
-                .write_event_async(Event::End(BytesEnd::new("starttls")))
-                .await?;
         }
         if self.mechanisms {
             writer
@@ -146,18 +147,10 @@ impl Features {
                     r#"mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl""#,
                 )))
                 .await?;
-            writer
+            writer.write_event_async(Event::Start(BytesStart::new(r#"mechanism"#))).await?;
-                .write_event_async(Event::Start(BytesStart::new(r#"mechanism"#)))
+            writer.write_event_async(Event::Text(BytesText::new("PLAIN"))).await?;
-                .await?;
+            writer.write_event_async(Event::End(BytesEnd::new("mechanism"))).await?;
-            writer
+            writer.write_event_async(Event::End(BytesEnd::new("mechanisms"))).await?;
-                .write_event_async(Event::Text(BytesText::new("PLAIN")))
-                .await?;
-            writer
-                .write_event_async(Event::End(BytesEnd::new("mechanism")))
-                .await?;
-            writer
-                .write_event_async(Event::End(BytesEnd::new("mechanisms")))
-                .await?;
         }
         if self.bind {
             writer
@@ -166,9 +159,7 @@ impl Features {
                 )))
                 .await?;
         }
-        writer
+        writer.write_event_async(Event::End(BytesEnd::new("stream:features"))).await?;
-            .write_event_async(Event::End(BytesEnd::new("stream:features")))
-            .await?;
         Ok(())
     }
 }
@@ -178,32 +169,31 @@ mod test {
     use super::*;
 
     #[tokio::test]
-    async fn client_stream_start_correct_parse() {
+    async fn client_stream_start_correct_parse() -> Result<()> {
-        let input = r###"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="vlnv.dev" version="1.0" xmlns="jabber:client" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace">"###;
+        let input = r###"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="example.com" version="1.0" xmlns="jabber:client" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace">"###;
         let mut reader = NsReader::from_reader(input.as_bytes());
         let mut buf = vec![];
-        let res = ClientStreamStart::parse(&mut reader, &mut buf)
+        let res = ClientStreamStart::parse(&mut reader, &mut buf).await?;
-            .await
-            .unwrap();
         assert_eq!(
             res,
             ClientStreamStart {
-                to: "vlnv.dev".to_owned(),
+                to: "example.com".to_owned(),
                 lang: Some("en".to_owned()),
                 version: "1.0".to_owned()
             }
-        )
+        );
+        Ok(())
     }
 
     #[tokio::test]
     async fn server_stream_start_write() {
         let input = ServerStreamStart {
-            from: "vlnv.dev".to_owned(),
+            from: "example.com".to_owned(),
             lang: "en".to_owned(),
             id: "stream_id".to_owned(),
             version: "1.0".to_owned(),
         };
-        let expected = r###"<stream:stream from="vlnv.dev" version="1.0" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" xml:lang="en" id="stream_id">"###;
+        let expected = r###"<stream:stream from="example.com" version="1.0" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" xml:lang="en" id="stream_id">"###;
         let mut output: Vec<u8> = vec![];
         let mut writer = Writer::new(&mut output);
         input.write_xml(&mut writer).await.unwrap();

crates/proto-xmpp/src/streamerror.rs

@@ -0,0 +1,41 @@
+use crate::xml::ToXml;
+use quick_xml::events::{BytesEnd, BytesStart, Event};
+
+/// Stream error condition
+///
+/// [Spec](https://xmpp.org/rfcs/rfc6120.html#streams-error-conditions).
+pub enum StreamErrorKind {
+    /// The server has experienced a misconfiguration or other internal error that prevents it from servicing the stream.
+    InternalServerError,
+    /// The server is being shut down and all active streams are being closed.
+    SystemShutdown,
+}
+impl StreamErrorKind {
+    pub fn from_str(s: &str) -> Option<Self> {
+        match s {
+            "internal-server-error" => Some(Self::InternalServerError),
+            "system-shutdown" => Some(Self::SystemShutdown),
+            _ => None,
+        }
+    }
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Self::InternalServerError => "internal-server-error",
+            Self::SystemShutdown => "system-shutdown",
+        }
+    }
+}
+
+pub struct StreamError {
+    pub kind: StreamErrorKind,
+}
+impl ToXml for StreamError {
+    fn serialize(&self, events: &mut Vec<Event<'static>>) {
+        events.push(Event::Start(BytesStart::new("stream:error")));
+        events.push(Event::Empty(BytesStart::new(format!(
+            r#"{} xmlns="urn:ietf:params:xml:ns:xmpp-streams""#,
+            self.kind.as_str()
+        ))));
+        events.push(Event::End(BytesEnd::new("stream:error")));
+    }
+}

crates/proto-xmpp/src/testkit.rs

@@ -0,0 +1,12 @@
+use quick_xml::events::Event;
+use quick_xml::Writer;
+use std::io::Cursor;
+
+pub fn assemble_string_from_event_flow(events: &Vec<Event<'_>>) -> String {
+    let mut writer = Writer::new(Cursor::new(Vec::new()));
+    for event in events {
+        writer.write_event(event).unwrap();
+    }
+    let result = writer.into_inner().into_inner();
+    String::from_utf8(result).unwrap()
+}

crates/proto-xmpp/src/tls.rs

@@ -12,10 +12,7 @@ pub static XMLNS: &'static str = "urn:ietf:params:xml:ns:xmpp-tls";
 
 pub struct StartTLS;
 impl StartTLS {
-    pub async fn parse(
+    pub async fn parse(reader: &mut NsReader<impl AsyncBufRead + Unpin>, buf: &mut Vec<u8>) -> Result<StartTLS> {
-        reader: &mut NsReader<impl AsyncBufRead + Unpin>,
-        buf: &mut Vec<u8>,
-    ) -> Result<StartTLS> {
         let incoming = skip_text!(reader, buf);
         if let Event::Empty(ref e) = incoming {
             if e.name().0 == b"starttls" {

crates/proto-xmpp/src/xml/ignore.rs

@@ -1,59 +1,36 @@
 use super::*;
-use derive_more::From;
 
 #[derive(Default, Debug, PartialEq, Eq)]
 pub struct Ignore;
 
-#[derive(From)]
-pub struct IgnoreParser(IgnoreParserInner);
-
-enum IgnoreParserInner {
-    Initial,
-    InTag { name: Vec<u8>, depth: u8 },
-}
-
-impl Parser for IgnoreParser {
-    type Output = Result<Ignore>;
-
-    fn consume<'a>(
-        self: Self,
-        _: ResolveResult,
-        event: &Event<'a>,
-    ) -> Continuation<Self, Self::Output> {
-        match self.0 {
-            IgnoreParserInner::Initial => match event {
-                Event::Start(bytes) => {
-                    let name = bytes.name().0.to_owned();
-                    Continuation::Continue(IgnoreParserInner::InTag { name, depth: 0 }.into())
-                }
-                Event::Empty(_) => Continuation::Final(Ok(Ignore)),
-                _ => Continuation::Final(Ok(Ignore)),
-            },
-            IgnoreParserInner::InTag { name, depth } => match event {
-                Event::End(bytes) if name == bytes.name().0 => {
-                    if depth == 0 {
-                        Continuation::Final(Ok(Ignore))
-                    } else {
-                        Continuation::Continue(
-                            IgnoreParserInner::InTag {
-                                name,
-                                depth: depth - 1,
-                            }
-                            .into(),
-                        )
-                    }
-                }
-                _ => Continuation::Continue(IgnoreParserInner::InTag { name, depth }.into()),
-            },
-        }
-    }
-}
-
 impl FromXml for Ignore {
-    type P = IgnoreParser;
+    type P = impl Parser<Output = Result<Self>>;
 
     fn parse() -> Self::P {
-        IgnoreParserInner::Initial.into()
+        #[coroutine]
+        |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+            let mut depth = match event {
+                Event::Start(bytes) => 0,
+                Event::Empty(_) => return Ok(Ignore),
+                _ => return Ok(Ignore),
+            };
+            loop {
+                (namespace, event) = yield;
+                match event {
+                    Event::End(_) => {
+                        if depth == 0 {
+                            return Ok(Ignore);
+                        } else {
+                            depth -= 1;
+                        }
+                    }
+                    Event::Start(_) => {
+                        depth += 1;
+                    }
+                    _ => (),
+                }
+            }
+        }
     }
 }
 

crates/proto-xmpp/src/xml/mod.rs

@@ -1,18 +1,48 @@
 use std::ops::Coroutine;
 use std::pin::Pin;
 
-use quick_xml::NsReader;
 use quick_xml::events::Event;
 use quick_xml::name::ResolveResult;
+use quick_xml::NsReader;
 
 use anyhow::Result;
 
 mod ignore;
 pub use ignore::Ignore;
 
+/// Types which can be parsed from an XML input stream.
+///
+/// Example:
+/// ```
+/// #![feature(type_alias_impl_trait)]
+/// #![feature(impl_trait_in_assoc_type)]
+/// #![feature(coroutines)]
+/// # use proto_xmpp::xml::FromXml;
+/// # use quick_xml::events::Event;
+/// # use quick_xml::name::ResolveResult;
+/// # use proto_xmpp::xml::Parser;
+/// # use anyhow::Result;
+///
+/// struct MyStruct;
+/// impl FromXml for MyStruct {
+///     type P = impl Parser<Output = Result<Self>>;
+///
+///     fn parse() -> Self::P {
+///         #[coroutine]
+///         |(mut namespace, mut event): (ResolveResult<'static>, &'static Event<'static>)| -> Result<Self> {
+///             (namespace, event) = yield;
+///             Ok(MyStruct)
+///         }
+///     }
+/// }
+/// ```
 pub trait FromXml: Sized {
+    /// The type of parser instances.
+    ///
+    /// If the result type of the [parse] is anonymous, this type member can be defined by using `impl Trait`.
     type P: Parser<Output = Result<Self>>;
 
+    /// Creates a new instance of a parser with an initial state.
     fn parse() -> Self::P;
 }
 
@@ -25,28 +55,28 @@ pub trait FromXmlTag: FromXml {
     const NS: &'static str;
 }
 
+/// A stateful parser instance which consumes XML events until the parsing is complete.
+///
+/// Usually implemented with the experimental coroutine syntax, which yields to consume the next XML event,
+/// and returns the final result when the parsing is done.
 pub trait Parser: Sized {
     type Output;
 
-    fn consume<'a>(
+    /// Advance the parsing by one XML event.
-        self: Self,
+    ///
-        namespace: ResolveResult,
+    /// This method consumes `self`, but if the parsing is incomplete,
-        event: &Event<'a>,
+    /// it will return the next state of the parser in the returned result.
-    ) -> Continuation<Self, Self::Output>;
+    /// Otherwise, it will return the final result of parsing.
+    fn consume<'a>(self: Self, namespace: ResolveResult, event: &Event<'a>) -> Continuation<Self, Self::Output>;
 }
 
 impl<T, Out> Parser for T
 where
-    T: Coroutine<(ResolveResult<'static>, &'static Event<'static>), Yield = (), Return = Out>
+    T: Coroutine<(ResolveResult<'static>, &'static Event<'static>), Yield = (), Return = Out> + Unpin,
-        + Unpin,
 {
     type Output = Out;
 
-    fn consume<'a>(
+    fn consume<'a>(mut self: Self, namespace: ResolveResult, event: &Event<'a>) -> Continuation<Self, Self::Output> {
-        mut self: Self,
-        namespace: ResolveResult,
-        event: &Event<'a>,
-    ) -> Continuation<Self, Self::Output> {
         let s = Pin::new(&mut self);
         // this is a very rude workaround fixing the fact that rust coroutines
         // 1. don't support higher-kinded lifetimes (i.e. no `impl for <'a> Coroutine<Event<'a>>)
@@ -59,8 +89,11 @@ where
     }
 }
 
+/// The result of a single parser iteration.
 pub enum Continuation<Parser, Res> {
+    /// The parsing is complete and the final result is available.
     Final(Res),
+    /// The parsing is not complete and more XML events are required.
     Continue(Parser),
 }
 
@@ -98,8 +131,8 @@ macro_rules! delegate_parsing {
                 Continuation::Final(Ok(res)) => break Ok(res.into()),
                 Continuation::Final(Err(err)) => break Err(err),
                 Continuation::Continue(p) => {
-                    let (namespace, event) = yield;
+                    ($namespace, $event) = yield;
-                    parser = p.consume(namespace, event);
+                    parser = p.consume($namespace, $event);
                 }
             }
         }

crates/sasl/src/lib.rs

@@ -37,52 +37,51 @@ impl AuthBody {
 mod test {
     use super::*;
     #[test]
-    fn test_returning_auth_body() {
+    fn test_returning_auth_body() -> Result<()> {
         let orig = b"\x00login\x00pass";
         let encoded = general_purpose::STANDARD.encode(orig);
         let expected = AuthBody {
             login: "login".to_string(),
             password: "pass".to_string(),
         };
-        let result = AuthBody::from_str(encoded.as_bytes()).unwrap();
+        let result = AuthBody::from_str(encoded.as_bytes())?;
 
         assert_eq!(expected, result);
+        Ok(())
     }
 
     #[test]
-    fn test_ignoring_first_segment() {
+    fn test_ignoring_first_segment() -> Result<()> {
         let orig = b"ignored\x00login\x00pass";
         let encoded = general_purpose::STANDARD.encode(orig);
         let expected = AuthBody {
             login: "login".to_string(),
             password: "pass".to_string(),
         };
-        let result = AuthBody::from_str(encoded.as_bytes()).unwrap();
+        let result = AuthBody::from_str(encoded.as_bytes())?;
 
         assert_eq!(expected, result);
+        Ok(())
     }
 
     #[test]
-    fn test_returning_auth_body_with_empty_strings() {
+    fn test_returning_auth_body_with_empty_strings() -> Result<()> {
         let orig = b"\x00\x00";
         let encoded = general_purpose::STANDARD.encode(orig);
         let expected = AuthBody {
             login: "".to_string(),
             password: "".to_string(),
         };
-        let result = AuthBody::from_str(encoded.as_bytes()).unwrap();
+        let result = AuthBody::from_str(encoded.as_bytes())?;
 
         assert_eq!(expected, result);
+        Ok(())
     }
 
     #[test]
     fn test_fail_if_size_less_then_3() {
         let orig = b"login\x00pass";
         let encoded = general_purpose::STANDARD.encode(orig);
-        let expected = AuthBody {
-            login: "login".to_string(),
-            password: "pass".to_string(),
-        };
         let result = AuthBody::from_str(encoded.as_bytes());
 
         assert!(result.is_err());
@@ -92,10 +91,6 @@ mod test {
     fn test_fail_if_size_greater_then_3() {
         let orig = b"first\x00login\x00pass\x00other";
         let encoded = general_purpose::STANDARD.encode(orig);
-        let expected = AuthBody {
-            login: "login".to_string(),
-            password: "pass".to_string(),
-        };
         let result = AuthBody::from_str(encoded.as_bytes());
 
         assert!(result.is_err());

docs/cheatsheet.md

@@ -8,11 +8,12 @@ Some useful commands for development and testing.
 
 Following commands require `OpenSSL` to be installed. It is provided as `openssl` package in Arch Linux.
 
-Generate self-signed TLS certificate:
+Generate self-signed TLS certificate. Mind the common name (CN) field, it should match the domain name of the server.
+Example for localhost:
 
     openssl req -x509 -newkey rsa:4096 -sha256 -days 365 -noenc \
     -keyout certs/xmpp.key -out certs/xmpp.pem \
-    -subj "/CN=example.com"
+    -subj "/CN=localhost"
 
 Print content of a TLS certificate:
 

docs/running.md

@@ -19,9 +19,15 @@ server_name = "irc.localhost"
 listen_on = "127.0.0.1:5222"
 cert = "./certs/xmpp.pem"
 key = "./certs/xmpp.key"
+hostname = "localhost"
 
 [storage]
 db_path = "db.sqlite"
+
+[tracing]
+# otlp grpc endpoint
+endpoint = "http://jaeger:4317"
+service_name = "lavina"
 ```
 
 ## With Docker Compose
@@ -40,6 +46,15 @@ services:
       - '5222:5222'  # xmpp
       - '6667:6667'  # irc non-tls
       - '127.0.0.1:1380:8080' # management http (private)
+  # if you want to observe traces
+  jaeger:
+    image: "jaegertracing/all-in-one:1.56"
+    ports:
+      - "16686:16686" # web ui
+      - "4317:4317"   # grpc ingest endpoint
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+      - SPAN_STORAGE_TYPE=memory
 ```
 
 ## With Cargo
@@ -52,3 +67,35 @@ Or you can build it and run manually:
 
     cargo build --release
     ./target/release/lavina --config config.toml
+
+
+## Migrations
+
+### Prerequisites
+
+Install sqlx-cli into ~/.local/bin:
+
+    cargo install --locked sqlx-cli
+
+### Steps
+
+Migrations run on every application start. For manual run, use sqlx:
+
+    sqlx mig run \
+        --source ./crates/lavina-core/migrations/ \
+        --database-url sqlite://db.sqlite
+
+To see current status:
+
+    sqlx mig info \
+        --source ./crates/lavina-core/migrations/ \
+        --database-url sqlite://db.sqlite
+
+sqlx mig info outputs
+
+    0/installed first
+    1/installed msg author
+    2/installed created at for messages
+    3/installed dialogs
+    4/installed new challenges
+    5/pending message datetime

rust-toolchain

@@ -1 +1 @@
-nightly-2024-02-08
+nightly-2024-06-18

rustfmt.toml

@@ -1 +1,2 @@
 max_width = 120
+chain_width = 120

src/http.rs

@@ -12,13 +12,16 @@ use prometheus::{Encoder, Registry as MetricsRegistry, TextEncoder};
 use serde::{Deserialize, Serialize};
 use tokio::net::TcpListener;
 
+use lavina_core::auth::UpdatePasswordResult;
+use lavina_core::player::{ChangeRoomTopicResult, PlayerConnectionResult, PlayerId, SendMessageResult};
 use lavina_core::prelude::*;
-use lavina_core::repo::Storage;
+use lavina_core::room::RoomId;
-use lavina_core::room::RoomRegistry;
 use lavina_core::terminator::Terminator;
-
+use lavina_core::LavinaCore;
 use mgmt_api::*;
 
+mod clustering;
+
 type HttpResult<T> = std::result::Result<T, Infallible>;
 
 #[derive(Deserialize, Debug)]
@@ -26,24 +29,18 @@ pub struct ServerConfig {
     pub listen_on: SocketAddr,
 }
 
-pub async fn launch(
+pub async fn launch(config: ServerConfig, metrics: MetricsRegistry, core: LavinaCore) -> Result<Terminator> {
-    config: ServerConfig,
-    metrics: MetricsRegistry,
-    rooms: RoomRegistry,
-    storage: Storage,
-) -> Result<Terminator> {
     log::info!("Starting the http service");
     let listener = TcpListener::bind(config.listen_on).await?;
     log::debug!("Listener started");
-    let terminator = Terminator::spawn(|rx| main_loop(listener, metrics, rooms, storage, rx.map(|_| ())));
+    let terminator = Terminator::spawn(|rx| main_loop(listener, metrics, core, rx.map(|_| ())));
     Ok(terminator)
 }
 
 async fn main_loop(
     listener: TcpListener,
     metrics: MetricsRegistry,
-    rooms: RoomRegistry,
+    core: LavinaCore,
-    storage: Storage,
     termination: impl Future<Output = ()>,
 ) -> Result<()> {
     pin!(termination);
@@ -55,13 +52,10 @@ async fn main_loop(
                 let (stream, _) = result?;
                 let stream = TokioIo::new(stream);
                 let metrics = metrics.clone();
-                let rooms = rooms.clone();
+                let core = core.clone();
-                let storage = storage.clone();
                 tokio::task::spawn(async move {
-                    let registry = metrics.clone();
+                    let svc_fn = service_fn(|r| route(&metrics, &core, r));
-                    let rooms = rooms.clone();
+                    let server = http1::Builder::new().serve_connection(stream, svc_fn);
-                    let storage = storage.clone();
-                    let server = http1::Builder::new().serve_connection(stream, service_fn(move |r| route(registry.clone(), rooms.clone(), storage.clone(), r)));
                     if let Err(err) = server.await {
                         tracing::error!("Error serving connection: {:?}", err);
                     }
@@ -73,90 +67,151 @@ async fn main_loop(
     Ok(())
 }
 
+#[tracing::instrument(skip_all)]
 async fn route(
-    registry: MetricsRegistry,
+    registry: &MetricsRegistry,
-    rooms: RoomRegistry,
+    core: &LavinaCore,
-    storage: Storage,
     request: Request<hyper::body::Incoming>,
 ) -> HttpResult<Response<Full<Bytes>>> {
+    propagade_span_from_headers(&request);
     let res = match (request.method(), request.uri().path()) {
         (&Method::GET, "/metrics") => endpoint_metrics(registry),
-        (&Method::GET, "/rooms") => endpoint_rooms(rooms).await,
+        (&Method::GET, "/rooms") => endpoint_rooms(core).await,
-        (&Method::POST, paths::CREATE_PLAYER) => endpoint_create_player(request, storage).await.or5xx(),
+        (&Method::POST, paths::CREATE_PLAYER) => endpoint_create_player(request, core).await.or5xx(),
-        (&Method::POST, paths::SET_PASSWORD) => endpoint_set_password(request, storage).await.or5xx(),
+        (&Method::POST, paths::STOP_PLAYER) => endpoint_stop_player(request, core).await.or5xx(),
-        _ => not_found(),
+        (&Method::POST, paths::SET_PASSWORD) => endpoint_set_password(request, core).await.or5xx(),
+        (&Method::POST, rooms::paths::SEND_MESSAGE) => endpoint_send_room_message(request, core).await.or5xx(),
+        (&Method::POST, rooms::paths::SET_TOPIC) => endpoint_set_room_topic(request, core).await.or5xx(),
+        _ => clustering::route(core, request).await.unwrap_or_else(endpoint_not_found),
     };
     Ok(res)
 }
 
-fn endpoint_metrics(registry: MetricsRegistry) -> Response<Full<Bytes>> {
+fn endpoint_metrics(registry: &MetricsRegistry) -> Response<Full<Bytes>> {
     let mf = registry.gather();
     let mut buffer = vec![];
     TextEncoder.encode(&mf, &mut buffer).expect("write to vec cannot fail");
     Response::new(Full::new(Bytes::from(buffer)))
 }
 
-async fn endpoint_rooms(rooms: RoomRegistry) -> Response<Full<Bytes>> {
+#[tracing::instrument(skip_all)]
+async fn endpoint_rooms(core: &LavinaCore) -> Response<Full<Bytes>> {
     // TODO introduce management API types independent from core-domain types
     // TODO remove `Serialize` implementations from all core-domain types
-    let room_list = rooms.get_all_rooms().await.to_body();
+    let room_list = core.get_all_rooms().await.to_body();
     Response::new(room_list)
 }
 
+#[tracing::instrument(skip_all)]
 async fn endpoint_create_player(
     request: Request<hyper::body::Incoming>,
-    mut storage: Storage,
+    core: &LavinaCore,
 ) -> Result<Response<Full<Bytes>>> {
     let str = request.collect().await?.to_bytes();
     let Ok(res) = serde_json::from_slice::<CreatePlayerRequest>(&str[..]) else {
-        let payload = ErrorResponse {
+        return Ok(malformed_request());
-            code: errors::MALFORMED_REQUEST,
-            message: "The request payload contains incorrect JSON value",
-        }
-        .to_body();
-        let mut response = Response::new(payload);
-        *response.status_mut() = StatusCode::BAD_REQUEST;
-        return Ok(response);
     };
-    storage.create_user(&res.name).await?;
+    core.create_player(&PlayerId::from(res.name)?).await?;
     log::info!("Player {} created", res.name);
     let mut response = Response::new(Full::<Bytes>::default());
     *response.status_mut() = StatusCode::CREATED;
     Ok(response)
 }
 
+#[tracing::instrument(skip_all)]
+async fn endpoint_stop_player(
+    request: Request<hyper::body::Incoming>,
+    core: &LavinaCore,
+) -> Result<Response<Full<Bytes>>> {
+    let str = request.collect().await?.to_bytes();
+    let Ok(res) = serde_json::from_slice::<StopPlayerRequest>(&str[..]) else {
+        return Ok(malformed_request());
+    };
+    let Ok(player_id) = PlayerId::from(res.name) else {
+        return Ok(player_not_found());
+    };
+    let Some(()) = core.stop_player(&player_id).await? else {
+        return Ok(player_not_found());
+    };
+    Ok(empty_204_request())
+}
+
+#[tracing::instrument(skip_all)]
 async fn endpoint_set_password(
     request: Request<hyper::body::Incoming>,
-    mut storage: Storage,
+    core: &LavinaCore,
 ) -> Result<Response<Full<Bytes>>> {
     let str = request.collect().await?.to_bytes();
     let Ok(res) = serde_json::from_slice::<ChangePasswordRequest>(&str[..]) else {
-        let payload = ErrorResponse {
+        return Ok(malformed_request());
-            code: errors::MALFORMED_REQUEST,
-            message: "The request payload contains incorrect JSON value",
-        }
-        .to_body();
-        let mut response = Response::new(payload);
-        *response.status_mut() = StatusCode::BAD_REQUEST;
-        return Ok(response);
     };
-    let Some(_) = storage.set_password(&res.player_name, &res.password).await? else {
+    let verdict = core.set_password(&res.player_name, &res.password).await?;
-        let payload = ErrorResponse {
+    match verdict {
-            code: errors::PLAYER_NOT_FOUND,
+        UpdatePasswordResult::PasswordUpdated => {}
-            message: "No such player exists",
+        UpdatePasswordResult::UserNotFound => {
+            return Ok(player_not_found());
         }
-        .to_body();
+    }
-        let mut response = Response::new(payload);
+    Ok(empty_204_request())
-        *response.status_mut() = StatusCode::UNPROCESSABLE_ENTITY;
-        return Ok(response);
-    };
-    log::info!("Password changed for player {}", res.player_name);
-    let mut response = Response::new(Full::<Bytes>::default());
-    *response.status_mut() = StatusCode::NO_CONTENT;
-    Ok(response)
 }
 
-pub fn not_found() -> Response<Full<Bytes>> {
+#[tracing::instrument(skip_all)]
+async fn endpoint_send_room_message(
+    request: Request<hyper::body::Incoming>,
+    core: &LavinaCore,
+) -> Result<Response<Full<Bytes>>> {
+    let str = request.collect().await?.to_bytes();
+    let Ok(req) = serde_json::from_slice::<rooms::SendMessageReq>(&str[..]) else {
+        return Ok(malformed_request());
+    };
+    let Ok(room_id) = RoomId::try_from(req.room_id) else {
+        return Ok(room_not_found());
+    };
+    let Ok(player_id) = PlayerId::from(req.author_id) else {
+        return Ok(player_not_found());
+    };
+    let mut connection = match core.connect_to_player(&player_id).await? {
+        PlayerConnectionResult::Success(connection) => connection,
+        PlayerConnectionResult::PlayerNotFound => {
+            return Ok(player_not_found());
+        }
+    };
+    let res = connection.send_message(room_id, req.message.into()).await?;
+    match res {
+        SendMessageResult::NoSuchRoom => Ok(room_not_found()),
+        SendMessageResult::Success(_) => Ok(empty_204_request()),
+    }
+}
+
+#[tracing::instrument(skip_all)]
+async fn endpoint_set_room_topic(
+    request: Request<hyper::body::Incoming>,
+    core: &LavinaCore,
+) -> Result<Response<Full<Bytes>>> {
+    let str = request.collect().await?.to_bytes();
+    let Ok(req) = serde_json::from_slice::<rooms::SetTopicReq>(&str[..]) else {
+        return Ok(malformed_request());
+    };
+    let Ok(room_id) = RoomId::try_from(req.room_id) else {
+        return Ok(room_not_found());
+    };
+    let Ok(player_id) = PlayerId::from(req.author_id) else {
+        return Ok(player_not_found());
+    };
+    let mut connection = match core.connect_to_player(&player_id).await? {
+        PlayerConnectionResult::Success(connection) => connection,
+        PlayerConnectionResult::PlayerNotFound => {
+            return Ok(player_not_found());
+        }
+    };
+    let res = connection.change_topic(room_id, req.topic.into()).await?;
+    match res {
+        ChangeRoomTopicResult::Success => Ok(empty_204_request()),
+        ChangeRoomTopicResult::NoSuchRoom => Ok(room_not_found()),
+    }
+}
+
+fn endpoint_not_found() -> Response<Full<Bytes>> {
     let payload = ErrorResponse {
         code: errors::INVALID_PATH,
         message: "The path does not exist",
@@ -168,25 +223,64 @@ pub fn not_found() -> Response<Full<Bytes>> {
     response
 }
 
+fn player_not_found() -> Response<Full<Bytes>> {
+    let payload = ErrorResponse {
+        code: errors::PLAYER_NOT_FOUND,
+        message: "No such player exists",
+    }
+    .to_body();
+    let mut response = Response::new(payload);
+    *response.status_mut() = StatusCode::UNPROCESSABLE_ENTITY;
+    response
+}
+
+fn room_not_found() -> Response<Full<Bytes>> {
+    let payload = ErrorResponse {
+        code: rooms::errors::ROOM_NOT_FOUND,
+        message: "No such room exists",
+    }
+    .to_body();
+    let mut response = Response::new(payload);
+    *response.status_mut() = StatusCode::UNPROCESSABLE_ENTITY;
+    response
+}
+
+fn malformed_request() -> Response<Full<Bytes>> {
+    let payload = ErrorResponse {
+        code: errors::MALFORMED_REQUEST,
+        message: "The request payload contains incorrect JSON value",
+    }
+    .to_body();
+
+    let mut response = Response::new(payload);
+    *response.status_mut() = StatusCode::BAD_REQUEST;
+    return response;
+}
+
+fn empty_204_request() -> Response<Full<Bytes>> {
+    let mut response = Response::new(Full::<Bytes>::default());
+    *response.status_mut() = StatusCode::NO_CONTENT;
+    response
+}
+
 trait Or5xx {
     fn or5xx(self) -> Response<Full<Bytes>>;
 }
+
 impl Or5xx for Result<Response<Full<Bytes>>> {
     fn or5xx(self) -> Response<Full<Bytes>> {
-        match self {
+        self.unwrap_or_else(|e| {
-            Ok(e) => e,
+            let mut response = Response::new(Full::new(e.to_string().into()));
-            Err(e) => {
+            *response.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
-                let mut response = Response::new(Full::new(e.to_string().into()));
+            response
-                *response.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+        })
-                response
-            }
-        }
     }
 }
 
 trait ToBody {
     fn to_body(&self) -> Full<Bytes>;
 }
+
 impl<T> ToBody for T
 where
     T: Serialize,
@@ -197,3 +291,24 @@ where
         Full::new(Bytes::from(buffer))
     }
 }
+
+fn propagade_span_from_headers<T>(req: &Request<T>) {
+    use opentelemetry::propagation::Extractor;
+    use tracing::Span;
+    use tracing_opentelemetry::OpenTelemetrySpanExt;
+    struct HttpReqExtractor<'a, T> {
+        req: &'a Request<T>,
+    }
+    impl<'a, T> Extractor for HttpReqExtractor<'a, T> {
+        fn get(&self, key: &str) -> Option<&str> {
+            self.req.headers().get(key).and_then(|v| v.to_str().ok())
+        }
+
+        fn keys(&self) -> Vec<&str> {
+            self.req.headers().keys().map(|k| k.as_str()).collect()
+        }
+    }
+
+    let ctx = opentelemetry::global::get_text_map_propagator(|pp| pp.extract(&HttpReqExtractor { req }));
+    Span::current().set_parent(ctx);
+}

src/http/clustering.rs

@@ -0,0 +1,72 @@
+use http_body_util::{BodyExt, Full};
+use hyper::body::Bytes;
+use hyper::{Method, Request, Response};
+
+use super::Or5xx;
+use crate::http::{empty_204_request, malformed_request, player_not_found, room_not_found};
+use lavina_core::clustering::room::{paths, JoinRoomReq, SendMessageReq};
+use lavina_core::player::PlayerId;
+use lavina_core::room::RoomId;
+use lavina_core::LavinaCore;
+
+// TODO move this into core
+
+pub async fn route(core: &LavinaCore, request: Request<hyper::body::Incoming>) -> Option<Response<Full<Bytes>>> {
+    match (request.method(), request.uri().path()) {
+        (&Method::POST, paths::JOIN) => Some(endpoint_cluster_join_room(request, core).await.or5xx()),
+        (&Method::POST, paths::ADD_MESSAGE) => Some(endpoint_cluster_add_message(request, core).await.or5xx()),
+        _ => None,
+    }
+}
+
+#[tracing::instrument(skip_all, name = "endpoint_cluster_join_room")]
+async fn endpoint_cluster_join_room(
+    request: Request<hyper::body::Incoming>,
+    core: &LavinaCore,
+) -> lavina_core::prelude::Result<Response<Full<Bytes>>> {
+    let str = request.collect().await?.to_bytes();
+    let Ok(req) = serde_json::from_slice::<JoinRoomReq>(&str[..]) else {
+        return Ok(malformed_request());
+    };
+    tracing::info!("Incoming request: {:?}", &req);
+    let Ok(room_id) = RoomId::try_from(req.room_id) else {
+        dbg!(&req.room_id);
+        return Ok(room_not_found());
+    };
+    let Ok(player_id) = PlayerId::from(req.player_id) else {
+        dbg!(&req.player_id);
+        return Ok(player_not_found());
+    };
+    core.cluster_join_room(room_id, &player_id).await?;
+    Ok(empty_204_request())
+}
+
+#[tracing::instrument(skip_all, name = "endpoint_cluster_add_message")]
+async fn endpoint_cluster_add_message(
+    request: Request<hyper::body::Incoming>,
+    core: &LavinaCore,
+) -> lavina_core::prelude::Result<Response<Full<Bytes>>> {
+    let str = request.collect().await?.to_bytes();
+    let Ok(req) = serde_json::from_slice::<SendMessageReq>(&str[..]) else {
+        return Ok(malformed_request());
+    };
+    tracing::info!("Incoming request: {:?}", &req);
+    let Ok(created_at) = chrono::DateTime::parse_from_rfc3339(req.created_at) else {
+        dbg!(&req.created_at);
+        return Ok(malformed_request());
+    };
+    let Ok(room_id) = RoomId::try_from(req.room_id) else {
+        dbg!(&req.room_id);
+        return Ok(room_not_found());
+    };
+    let Ok(player_id) = PlayerId::from(req.player_id) else {
+        dbg!(&req.player_id);
+        return Ok(player_not_found());
+    };
+    let res = core.cluster_send_room_message(room_id, &player_id, req.message.into(), created_at.to_utc()).await?;
+    if let Some(_) = res {
+        Ok(empty_204_request())
+    } else {
+        Ok(room_not_found())
+    }
+}

src/main.rs

@@ -6,13 +6,23 @@ use std::path::Path;
 use clap::Parser;
 use figment::providers::Format;
 use figment::{providers::Toml, Figment};
+use opentelemetry::global::set_text_map_propagator;
+use opentelemetry::KeyValue;
+use opentelemetry_otlp::WithExportConfig;
+use opentelemetry_sdk::propagation::TraceContextPropagator;
+use opentelemetry_sdk::trace::{BatchConfig, RandomIdGenerator, Sampler};
+use opentelemetry_sdk::{runtime, Resource};
+use opentelemetry_semantic_conventions::resource::SERVICE_NAME;
+use opentelemetry_semantic_conventions::SCHEMA_URL;
 use prometheus::Registry as MetricsRegistry;
 use serde::Deserialize;
+use tracing_opentelemetry::OpenTelemetryLayer;
+use tracing_subscriber::fmt::Subscriber;
+use tracing_subscriber::prelude::*;
 
-use lavina_core::player::PlayerRegistry;
 use lavina_core::prelude::*;
 use lavina_core::repo::Storage;
-use lavina_core::room::RoomRegistry;
+use lavina_core::LavinaCore;
 
 #[derive(Deserialize, Debug)]
 struct ServerConfig {
@@ -20,6 +30,14 @@ struct ServerConfig {
     irc: projection_irc::ServerConfig,
     xmpp: projection_xmpp::ServerConfig,
     storage: lavina_core::repo::StorageConfig,
+    cluster: lavina_core::clustering::ClusterConfig,
+    tracing: Option<TracingConfig>,
+}
+
+#[derive(Deserialize, Debug)]
+struct TracingConfig {
+    endpoint: String,
+    service_name: String,
 }
 
 #[derive(Parser)]
@@ -37,9 +55,9 @@ fn load_config() -> Result<ServerConfig> {
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    set_up_logging()?;
     let sleep = ctrl_c()?;
     let config = load_config()?;
+    set_up_logging(&config.tracing)?;
 
     tracing::info!("Booting up");
     tracing::info!("Loaded config: {config:?}");
@@ -48,21 +66,15 @@ async fn main() -> Result<()> {
         irc: irc_config,
         xmpp: xmpp_config,
         storage: storage_config,
+        cluster: cluster_config,
+        tracing: _,
     } = config;
     let mut metrics = MetricsRegistry::new();
     let storage = Storage::open(storage_config).await?;
-    let rooms = RoomRegistry::new(&mut metrics, storage.clone())?;
+    let core = LavinaCore::new(&mut metrics, cluster_config, storage).await?;
-    let mut players = PlayerRegistry::empty(rooms.clone(), &mut metrics)?;
+    let telemetry_terminator = http::launch(telemetry_config, metrics.clone(), core.clone()).await?;
-    let telemetry_terminator = http::launch(telemetry_config, metrics.clone(), rooms.clone(), storage.clone()).await?;
+    let irc = projection_irc::launch(irc_config, core.clone(), metrics.clone()).await?;
-    let irc = projection_irc::launch(
+    let xmpp = projection_xmpp::launch(xmpp_config, core.clone(), metrics.clone()).await?;
-        irc_config,
-        players.clone(),
-        rooms.clone(),
-        metrics.clone(),
-        storage.clone(),
-    )
-    .await?;
-    let xmpp = projection_xmpp::launch(xmpp_config, players.clone(), rooms.clone(), metrics.clone(), storage.clone()).await?;
     tracing::info!("Started");
 
     sleep.await;
@@ -71,10 +83,8 @@ async fn main() -> Result<()> {
     xmpp.terminate().await?;
     irc.terminate().await?;
     telemetry_terminator.terminate().await?;
-    players.shutdown_all().await?;
+    let storage = core.shutdown().await;
-    drop(players);
+    storage.close().await;
-    drop(rooms);
-    storage.close().await?;
     tracing::info!("Shutdown complete");
     Ok(())
 }
@@ -99,7 +109,45 @@ fn ctrl_c() -> Result<impl Future<Output = ()>> {
     Ok(recv(chan))
 }
 
-fn set_up_logging() -> Result<()> {
+fn set_up_logging(tracing_config: &Option<TracingConfig>) -> Result<()> {
-    tracing_subscriber::fmt::init();
+    let subscriber = tracing_subscriber::registry().with(tracing_subscriber::fmt::layer());
+
+    let targets = {
+        use std::{env, str::FromStr};
+        use tracing_subscriber::filter::Targets;
+        match env::var("RUST_LOG") {
+            Ok(var) => Targets::from_str(&var)
+                .map_err(|e| {
+                    eprintln!("Ignoring `RUST_LOG={:?}`: {}", var, e);
+                })
+                .unwrap_or_default(),
+            Err(env::VarError::NotPresent) => Targets::new().with_default(Subscriber::DEFAULT_MAX_LEVEL),
+            Err(e) => {
+                eprintln!("Ignoring `RUST_LOG`: {}", e);
+                Targets::new().with_default(Subscriber::DEFAULT_MAX_LEVEL)
+            }
+        }
+    };
+    if let Some(config) = tracing_config {
+        let trace_config = opentelemetry_sdk::trace::Config::default()
+            .with_sampler(Sampler::ParentBased(Box::new(Sampler::TraceIdRatioBased(1.0))))
+            .with_id_generator(RandomIdGenerator::default())
+            .with_resource(Resource::from_schema_url(
+                [KeyValue::new(SERVICE_NAME, config.service_name.to_string())],
+                SCHEMA_URL,
+            ));
+        let trace_exporter = opentelemetry_otlp::new_exporter().tonic().with_endpoint(&config.endpoint);
+        let tracer = opentelemetry_otlp::new_pipeline()
+            .tracing()
+            .with_trace_config(trace_config)
+            .with_batch_config(BatchConfig::default())
+            .with_exporter(trace_exporter)
+            .install_batch(runtime::Tokio)?;
+        let subscriber = subscriber.with(OpenTelemetryLayer::new(tracer));
+        set_text_map_propagator(TraceContextPropagator::new());
+        targets.with_subscriber(subscriber).try_init()?;
+    } else {
+        targets.with_subscriber(subscriber).try_init()?;
+    }
     Ok(())
 }