improve docs and split command handlers into methods (#40)

- use server name in welcome message
- use app version of crate in app_version field

Reviewed-on: lavina/lavina#35
Co-authored-by: homycdev <abdulkhamid98@gmail.com>
Co-committed-by: homycdev <abdulkhamid98@gmail.com>

.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:

.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

@@ -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 = "0.31.0", features = ["async-tokio"] }
 lazy_static = "1.4.0"
 regex = "1.7.1"
 derive_more = "0.99.17"
@@ -62,4 +62,4 @@ clap.workspace = true
 [dev-dependencies]
 assert_matches.workspace = true
 regex = "1.7.1"
-reqwest = { version = "0.11", default-features = false }
+reqwest = { version = "0.12.0", default-features = false }

crates/lavina-core/src/player.rs

@@ -14,10 +14,7 @@ use std::{
 
 use prometheus::{IntGauge, Registry as MetricsRegistry};
 use serde::Serialize;
-use tokio::{
+use tokio::sync::mpsc::{channel, Receiver, Sender};
-    sync::mpsc::{channel, Receiver, Sender},
-    task::JoinHandle,
-};
 
 use crate::prelude::*;
 use crate::room::{RoomHandle, RoomId, RoomInfo, RoomRegistry};
@@ -45,58 +42,65 @@ 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>,
     player_handle: PlayerHandle,
 }
 impl PlayerConnection {
+    /// Handled in [Player::send_message].
     pub async fn send_message(&mut self, room_id: RoomId, body: Str) -> Result<()> {
-        self.player_handle
+        let (promise, deferred) = oneshot();
-            .send_message(room_id, self.connection_id.clone(), body)
+        let cmd = ClientCommand::SendMessage { room_id, body, promise };
-            .await
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await;
+        Ok(deferred.await?)
     }
 
+    /// Handled in [Player::join_room].
     pub async fn join_room(&mut self, room_id: RoomId) -> Result<JoinResult> {
-        self.player_handle.join_room(room_id, self.connection_id.clone()).await
+        let (promise, deferred) = oneshot();
+        let cmd = ClientCommand::JoinRoom { room_id, promise };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await;
+        Ok(deferred.await?)
     }
 
+    /// Handled in [Player::change_topic].
     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::ChangeTopic {
             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()))
-            .await;
         Ok(deferred.await?)
     }
 
+    /// Handled in [Player::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 },
-                self.connection_id.clone(),
-            ))
-            .await;
         Ok(deferred.await?)
     }
 
     pub async fn terminate(self) {
-        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].
     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 };
+        self.player_handle.send(ActorCommand::ClientCommand(cmd, self.connection_id.clone())).await;
         Ok(deferred.await?)
     }
 }
@@ -104,13 +108,13 @@ impl PlayerConnection {
 /// Handle to a player actor.
 #[derive(Clone)]
 pub struct PlayerHandle {
-    tx: Sender<PlayerCommand>,
+    tx: Sender<ActorCommand>,
 }
 impl PlayerHandle {
     pub async fn subscribe(&self) -> 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;
         let connection_id = deferred.await.unwrap();
         PlayerConnection {
@@ -120,45 +124,34 @@ impl PlayerHandle {
         }
     }
 
-    pub async fn send_message(&self, room_id: RoomId, connection_id: ConnectionId, body: Str) -> Result<()> {
+    async fn send(&self, command: ActorCommand) {
-        let (promise, deferred) = oneshot();
+        // TODO either handle the error or doc why it is safe to ignore
-        let cmd = Cmd::SendMessage { room_id, body, promise };
-        let _ = self.tx.send(PlayerCommand::Cmd(cmd, connection_id)).await;
-        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;
+        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>,
         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>,
@@ -177,6 +170,9 @@ pub enum Cmd {
         new_topic: Str,
         promise: Promise<()>,
     },
+    GetRooms {
+        promise: Promise<Vec<RoomInfo>>,
+    },
 }
 
 pub enum JoinResult {
@@ -243,7 +239,7 @@ impl PlayerRegistry {
     pub async fn shutdown_all(&mut self) -> Result<()> {
         let mut inner = self.0.write().unwrap();
         for (i, (k, j)) in inner.players.drain() {
-            k.send(PlayerCommand::Stop).await;
+            k.send(ActorCommand::Stop).await;
             drop(k);
             j.await?;
             log::debug!("Player stopped #{i:?}")
@@ -266,7 +262,7 @@ struct Player {
     connections: AnonTable<Sender<Updates>>,
     my_rooms: HashMap<RoomId, RoomHandle>,
     banned_from: HashSet<RoomId>,
-    rx: Receiver<PlayerCommand>,
+    rx: Receiver<ActorCommand>,
     handle: PlayerHandle,
     rooms: RoomRegistry,
 }
@@ -291,124 +287,152 @@ impl Player {
     async fn main_loop(mut self) -> Self {
         while let Some(cmd) = self.rx.recv().await {
             match cmd {
-                PlayerCommand::AddConnection { sender, promise } => {
+                ActorCommand::AddConnection { sender, promise } => {
                     let connection_id = self.connections.insert(sender);
                     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) => {
+                ActorCommand::TerminateConnection(connection_id) => {
                     self.terminate_connection(connection_id);
                 }
-                PlayerCommand::GetRooms(promise) => {
+                ActorCommand::Update(update) => self.handle_update(update).await,
-                    let mut response = vec![];
+                ActorCommand::ClientCommand(cmd, connection_id) => self.handle_cmd(cmd, connection_id).await,
-                    for (_, handle) in &self.my_rooms {
+                ActorCommand::Stop => break,
-                        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);
-                        }
-                        _ => {}
-                    }
-                    for (_, connection) in &self.connections {
-                        let _ = connection.send(update.clone()).await;
-                    }
-                }
-                PlayerCommand::Cmd(cmd, connection_id) => self.handle_cmd(cmd, connection_id).await,
-                PlayerCommand::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.
+    async fn handle_update(&mut self, update: Updates) {
+        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);
+            }
+            _ => {}
+        }
+        for (_, connection) in &self.connections {
+            let _ = connection.send(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);
+                self.leave_room(connection_id, room_id).await;
-                if let Some(room) = room {
-                    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;
+                self.send_message(connection_id, room_id, body).await;
-                if let Some(room) = room {
-                    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::ChangeTopic {
                 room_id,
                 new_topic,
                 promise,
             } => {
-                let room = self.rooms.get_room(&room_id).await;
+                self.change_topic(connection_id, room_id, new_topic).await;
-                if let Some(mut room) = room {
-                    room.set_topic(self.player_id.clone(), new_topic.clone()).await;
-                } else {
-                    tracing::info!("no room found");
-                }
                 let _ = promise.send(());
-                let update = Updates::RoomTopicChanged { room_id, new_topic };
+            }
-                self.broadcast_update(update, connection_id).await;
+            ClientCommand::GetRooms { promise } => {
+                let result = self.get_rooms().await;
+                let _ = promise.send(result);
             }
         }
     }
 
+    async fn join_room(&mut self, connection_id: ConnectionId, room_id: RoomId) -> JoinResult {
+        if self.banned_from.contains(&room_id) {
+            return JoinResult::Banned;
+        }
+
+        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}");
+                todo!();
+            }
+        };
+        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 update = Updates::RoomJoined {
+            room_id,
+            new_member_id: self.player_id.clone(),
+        };
+        self.broadcast_update(update, connection_id).await;
+        JoinResult::Success(room_info)
+    }
+
+    async fn leave_room(&mut self, connection_id: ConnectionId, room_id: RoomId) {
+        let room = self.my_rooms.remove(&room_id);
+        if let Some(room) = room {
+            room.unsubscribe(&self.player_id).await;
+        }
+        let update = Updates::RoomLeft {
+            room_id,
+            former_member_id: self.player_id.clone(),
+        };
+        self.broadcast_update(update, connection_id).await;
+    }
+
+    async fn send_message(&mut self, connection_id: ConnectionId, room_id: RoomId, body: Str) {
+        let room = self.rooms.get_room(&room_id).await;
+        if let Some(room) = room {
+            room.send_message(self.player_id.clone(), body.clone()).await;
+        } else {
+            tracing::info!("no room found");
+        }
+        let update = Updates::NewMessage {
+            room_id,
+            author_id: self.player_id.clone(),
+            body,
+        };
+        self.broadcast_update(update, connection_id).await;
+    }
+
+    async fn change_topic(&mut self, connection_id: ConnectionId, room_id: RoomId, new_topic: Str) {
+        let room = self.rooms.get_room(&room_id).await;
+        if let Some(mut room) = room {
+            room.set_topic(self.player_id.clone(), new_topic.clone()).await;
+        } else {
+            tracing::info!("no room found");
+        }
+        let update = Updates::RoomTopicChanged { room_id, new_topic };
+        self.broadcast_update(update, connection_id).await;
+    }
+
+    async fn get_rooms(&self) -> Vec<RoomInfo> {
+        let mut response = vec![];
+        for (_, handle) in &self.my_rooms {
+            response.push(handle.get_room_info().await);
+        }
+        response
+    }
+
+    /// 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.
     async fn broadcast_update(&self, update: Updates, except: ConnectionId) {
         for (a, b) in &self.connections {
             if ConnectionId(a) == except {

crates/lavina-core/src/room.rs

@@ -31,7 +31,7 @@ impl RoomId {
     }
 }
 
-/// Shared datastructure for storing metadata about rooms.
+/// Shared data structure for storing metadata about rooms.
 #[derive(Clone)]
 pub struct RoomRegistry(Arc<AsyncRwLock<RoomRegistryInner>>);
 impl RoomRegistry {
@@ -160,9 +160,13 @@ impl RoomHandle {
 }
 
 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>,
+    /// The total number of messages. Used to calculate the id of the new message.
     message_count: u32,
     topic: Str,
     storage: Storage,
@@ -180,9 +184,7 @@ impl Room {
 
     async fn send_message(&mut self, author_id: PlayerId, body: Str) -> Result<()> {
         tracing::info!("Adding a message to room");
-        self.storage
+        self.storage.insert_message(self.storage_id, self.message_count, &body, &*author_id.as_inner()).await?;
-            .insert_message(self.storage_id, self.message_count, &body, &*author_id.as_inner())
-            .await?;
         self.message_count += 1;
         let update = Updates::NewMessage {
             room_id: self.room_id.clone(),
@@ -193,6 +195,10 @@ impl Room {
         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.
     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 {

crates/projection-irc/rustfmt.toml

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

crates/projection-irc/src/lib.rs

@@ -30,6 +30,8 @@ mod cap;
 
 use crate::cap::Capabilities;
 
+pub const APP_VERSION: &str = concat!("lavina", "_", env!("CARGO_PKG_VERSION"));
+
 #[derive(Deserialize, Debug, Clone)]
 pub struct ServerConfig {
     pub listen_on: SocketAddr,
@@ -42,7 +44,7 @@ struct RegisteredUser {
     /**
      * Username is mostly unused in modern IRC.
      *
-     * [https://stackoverflow.com/questions/31666247/what-is-the-difference-between-the-nick-username-and-real-name-in-irc-and-wha]
+     * <https://stackoverflow.com/questions/31666247/what-is-the-difference-between-the-nick-username-and-real-name-in-irc-and-wha>
      */
     username: Str,
     realname: Str,
@@ -62,19 +64,24 @@ async fn handle_socket(
     let mut reader: BufReader<ReadHalf> = BufReader::new(reader);
     let mut writer = BufWriter::new(writer);
 
-    let registered_user: Result<RegisteredUser> =
+    pin!(termination);
-        handle_registration(&mut reader, &mut writer, &mut storage, &config).await;
+    select! {
-
+        biased;
-    match registered_user {
+        _ = &mut termination =>{
-        Ok(user) => {
+            log::info!("Socket handling was terminated");
-            log::debug!("User registered");
+            return Ok(())
-            handle_registered_socket(config, players, rooms, &mut reader, &mut writer, user).await?;
+        },
-        }
+        registered_user = handle_registration(&mut reader, &mut writer, &mut storage, &config) =>
-        Err(err) => {
+            match registered_user {
-            log::debug!("Registration failed: {err}");
+                Ok(user) => {
-        }
+                    log::debug!("User registered");
+                    handle_registered_socket(config, players, rooms, &mut reader, &mut writer, user).await?;
+                }
+                Err(err) => {
+                    log::debug!("Registration failed: {err}");
+                }
+            }
     }
-
     stream.shutdown().await?;
     Ok(())
 }
@@ -180,14 +187,16 @@ async fn handle_registration<'a>(
                     writer.flush().await?;
                 }
                 CapabilitySubcommand::End => {
-                    let Some((username, realname)) = future_username else {
+                    let Some((ref username, ref realname)) = future_username else {
-                        todo!()
+                        todo!();
                     };
                     let Some(nickname) = future_nickname.clone() else {
-                        todo!()
+                        todo!();
                     };
+                    let username = username.clone();
+                    let realname = realname.clone();
                     let candidate_user = RegisteredUser {
-                        nickname,
+                        nickname: nickname.clone(),
                         username,
                         realname,
                     };
@@ -197,7 +206,15 @@ async fn handle_registration<'a>(
                         break Ok(candidate_user);
                     } else {
                         let Some(candidate_password) = pass else {
-                            todo!();
+                            sasl_fail_message(
+                                config.server_name.clone(),
+                                nickname.clone(),
+                                "User credentials was not provided".into(),
+                            )
+                            .write_async(writer)
+                            .await?;
+                            writer.flush().await?;
+                            continue;
                         };
                         auth_user(storage, &*candidate_user.nickname, &*candidate_password).await?;
                         break Ok(candidate_user);
@@ -209,12 +226,20 @@ async fn handle_registration<'a>(
                     future_nickname = Some(nickname);
                 } else if let Some((username, realname)) = future_username.clone() {
                     let candidate_user = RegisteredUser {
-                        nickname,
+                        nickname: nickname.clone(),
                         username,
                         realname,
                     };
                     let Some(candidate_password) = pass else {
-                        todo!();
+                        sasl_fail_message(
+                            config.server_name.clone(),
+                            nickname.clone(),
+                            "User credentials was not provided".into(),
+                        )
+                        .write_async(writer)
+                        .await?;
+                        writer.flush().await?;
+                        continue;
                     };
                     auth_user(storage, &*candidate_user.nickname, &*candidate_password).await?;
                     break Ok(candidate_user);
@@ -227,12 +252,20 @@ async fn handle_registration<'a>(
                     future_username = Some((username, realname));
                 } else if let Some(nickname) = future_nickname.clone() {
                     let candidate_user = RegisteredUser {
-                        nickname,
+                        nickname: nickname.clone(),
                         username,
                         realname,
                     };
                     let Some(candidate_password) = pass else {
-                        todo!();
+                        sasl_fail_message(
+                            config.server_name.clone(),
+                            nickname.clone(),
+                            "User credentials was not provided".into(),
+                        )
+                        .write_async(writer)
+                        .await?;
+                        writer.flush().await?;
+                        continue;
                     };
                     auth_user(storage, &*candidate_user.nickname, &*candidate_password).await?;
                     break Ok(candidate_user);
@@ -255,38 +288,59 @@ async fn handle_registration<'a>(
                         .await?;
                         writer.flush().await?;
                     } else {
-                        // TODO respond with 904
+                        if let Some(nickname) = future_nickname.clone() {
-                        todo!();
+                            sasl_fail_message(
+                                config.server_name.clone(),
+                                nickname.clone(),
+                                "Unsupported mechanism".into(),
+                            )
+                            .write_async(writer)
+                            .await?;
+                            writer.flush().await?;
+                        } else {
+                            break Err(anyhow::Error::msg("Wrong authentication sequence"));
+                        }
                     }
                 } else {
                     let body = AuthBody::from_str(body.as_bytes())?;
-                    auth_user(storage, &body.login, &body.password).await?;
+                    if let Err(e) = auth_user(storage, &body.login, &body.password).await {
-                    let login: Str = body.login.into();
+                        tracing::warn!("Authentication failed: {:?}", e);
-                    validated_user = Some(login.clone());
+                        if let Some(nickname) = future_nickname.clone() {
-                    ServerMessage {
+                            sasl_fail_message(config.server_name.clone(), nickname.clone(), "Bad credentials".into())
-                        tags: vec![],
+                                .write_async(writer)
-                        sender: Some(config.server_name.clone().into()),
+                                .await?;
-                        body: ServerMessageBody::N900LoggedIn {
+                            writer.flush().await?;
-                            nick: login.clone(),
+                        } else {
-                            address: login.clone(),
+                        }
-                            account: login.clone(),
+                    } else {
-                            message: format!("You are now logged in as {}", login).into(),
+                        let login: Str = body.login.into();
-                        },
+                        validated_user = Some(login.clone());
+                        ServerMessage {
+                            tags: vec![],
+                            sender: Some(config.server_name.clone().into()),
+                            body: ServerMessageBody::N900LoggedIn {
+                                nick: login.clone(),
+                                address: login.clone(),
+                                account: login.clone(),
+                                message: format!("You are now logged in as {}", login).into(),
+                            },
+                        }
+                        .write_async(writer)
+                        .await?;
+                        ServerMessage {
+                            tags: vec![],
+                            sender: Some(config.server_name.clone().into()),
+                            body: ServerMessageBody::N903SaslSuccess {
+                                nick: login.clone(),
+                                message: "SASL authentication successful".into(),
+                            },
+                        }
+                        .write_async(writer)
+                        .await?;
+                        writer.flush().await?;
                     }
-                    .write_async(writer)
-                    .await?;
-                    ServerMessage {
-                        tags: vec![],
-                        sender: Some(config.server_name.clone().into()),
-                        body: ServerMessageBody::N903SaslSuccess {
-                            nick: login.clone(),
-                            message: "SASL authentication successful".into(),
-                        },
-                    }
-                    .write_async(writer)
-                    .await?;
-                    writer.flush().await?;
                 }
+
                 // TODO handle abortion of authentication
             }
             _ => {}
@@ -297,6 +351,14 @@ async fn handle_registration<'a>(
     Ok(user)
 }
 
+fn sasl_fail_message(sender: Str, nick: Str, text: Str) -> ServerMessage {
+    ServerMessage {
+        tags: vec![],
+        sender: Some(sender),
+        body: ServerMessageBody::N904SaslFail { nick, text },
+    }
+}
+
 async fn auth_user(storage: &mut Storage, login: &str, plain_password: &str) -> Result<()> {
     let stored_user = storage.retrieve_user_by_name(login).await?;
 
@@ -331,13 +393,14 @@ async fn handle_registered_socket<'a>(
 
     let player_id = PlayerId::from(user.nickname.clone())?;
     let mut connection = players.connect_to_player(player_id.clone()).await;
+    let text: Str = format!("Welcome to {} Server", &config.server_name).into();
 
     ServerMessage {
         tags: vec![],
         sender: Some(config.server_name.clone()),
         body: ServerMessageBody::N001Welcome {
             client: user.nickname.clone(),
-            text: "Welcome to Kek Server".into(),
+            text: text.clone(),
         },
     }
     .write_async(writer)
@@ -347,7 +410,7 @@ async fn handle_registered_socket<'a>(
         sender: Some(config.server_name.clone()),
         body: ServerMessageBody::N002YourHost {
             client: user.nickname.clone(),
-            text: "Welcome to Kek Server".into(),
+            text: text.clone(),
         },
     }
     .write_async(writer)
@@ -357,7 +420,7 @@ async fn handle_registered_socket<'a>(
         sender: Some(config.server_name.clone()),
         body: ServerMessageBody::N003Created {
             client: user.nickname.clone(),
-            text: "Welcome to Kek Server".into(),
+            text: text.clone(),
         },
     }
     .write_async(writer)
@@ -368,7 +431,7 @@ async fn handle_registered_socket<'a>(
         body: ServerMessageBody::N004MyInfo {
             client: user.nickname.clone(),
             hostname: config.server_name.clone(),
-            softname: "kek-0.1.alpha.3".into(),
+            softname: APP_VERSION.into(),
         },
     }
     .write_async(writer)

crates/projection-irc/tests/lib.rs

@@ -1,3 +1,5 @@
+use std::io::ErrorKind;
+use std::net::SocketAddr;
 use std::time::Duration;
 
 use anyhow::{anyhow, Result};
@@ -8,8 +10,8 @@ use tokio::net::TcpStream;
 
 use lavina_core::repo::{Storage, StorageConfig};
 use lavina_core::{player::PlayerRegistry, room::RoomRegistry};
+use projection_irc::APP_VERSION;
 use projection_irc::{launch, read_irc_message, RunningServer, ServerConfig};
-
 struct TestScope<'a> {
     reader: BufReader<ReadHalf<'a>>,
     writer: WriteHalf<'a>,
@@ -111,10 +113,17 @@ 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(":testserver 001 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 002 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 003 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
+    s.expect(
+        format!(
+            ":testserver 004 tester testserver {} r CFILPQbcefgijklmnopqrstvz",
+            &APP_VERSION
+        )
+        .as_str(),
+    )
+    .await?;
     s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
@@ -159,10 +168,17 @@ async fn scenario_cap_full_negotiation() -> Result<()> {
 
     s.send("CAP END").await?;
 
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 001 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 002 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 003 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
+    s.expect(
+        format!(
+            ":testserver 004 tester testserver {} r CFILPQbcefgijklmnopqrstvz",
+            &APP_VERSION
+        )
+        .as_str(),
+    )
+    .await?;
     s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
@@ -201,10 +217,17 @@ async fn scenario_cap_short_negotiation() -> Result<()> {
 
     s.send("CAP END").await?;
 
-    s.expect(":testserver 001 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 001 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 002 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 002 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 003 tester :Welcome to Kek Server").await?;
+    s.expect(":testserver 003 tester :Welcome to testserver Server").await?;
-    s.expect(":testserver 004 tester testserver kek-0.1.alpha.3 r CFILPQbcefgijklmnopqrstvz").await?;
+    s.expect(
+        format!(
+            ":testserver 004 tester testserver {} r CFILPQbcefgijklmnopqrstvz",
+            &APP_VERSION
+        )
+        .as_str(),
+    )
+    .await?;
     s.expect(":testserver 005 tester CHANTYPES=# :are supported by this server").await?;
     s.expect_nothing().await?;
     s.send("QUIT :Leaving").await?;
@@ -218,3 +241,84 @@ async fn scenario_cap_short_negotiation() -> Result<()> {
     server.server.terminate().await?;
     Ok(())
 }
+
+#[tokio::test]
+async fn scenario_cap_sasl_fail() -> Result<()> {
+    let mut server = TestServer::start().await?;
+
+    // test scenario
+
+    server.storage.create_user("tester").await?;
+    server.storage.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(":testserver CAP * LS :sasl=PLAIN").await?;
+    s.send("CAP REQ :sasl").await?;
+    s.expect(":testserver CAP tester ACK :sasl").await?;
+    s.send("AUTHENTICATE SHA256").await?;
+    s.expect(":testserver 904 tester :Unsupported mechanism").await?;
+    s.send("AUTHENTICATE PLAIN").await?;
+    s.expect(":testserver AUTHENTICATE +").await?;
+    s.send("AUTHENTICATE dGVzdGVyAHRlc3RlcgBwYXNzd29yZDE=").await?;
+    s.expect(":testserver 904 tester :Bad credentials").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(":testserver 001 tester :Welcome to testserver Server").await?;
+    s.expect(":testserver 002 tester :Welcome to testserver Server").await?;
+    s.expect(":testserver 003 tester :Welcome to testserver Server").await?;
+    s.expect(
+        format!(
+            ":testserver 004 tester testserver {} r CFILPQbcefgijklmnopqrstvz",
+            &APP_VERSION
+        )
+        .as_str(),
+    )
+    .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?;
+    s.expect_eof().await?;
+
+    stream.shutdown().await?;
+
+    // wrap up
+
+    server.server.terminate().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn terminate_socket_scenario() -> Result<()> {
+    let mut server = TestServer::start().await?;
+    let address: SocketAddr = ("127.0.0.1:0".parse().unwrap());
+
+    // test scenario
+
+    server.storage.create_user("tester").await?;
+    server.storage.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.server.terminate().await?;
+    assert_eq!(stream.read_u8().await.unwrap_err().kind(), ErrorKind::UnexpectedEof);
+
+    Ok(())
+}

crates/projection-xmpp/rustfmt.toml

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

crates/projection-xmpp/src/lib.rs

@@ -187,18 +187,33 @@ async fn handle_socket(
     let mut xml_reader = NsReader::from_reader(BufReader::new(a));
     let mut xml_writer = Writer::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, &mut storage) => {
-        &mut connection,
+            match authenticated {
-        &rooms,
+                Ok(authenticated) => {
-    )
+                    let mut connection = players.connect_to_player(authenticated.player_id.clone()).await;
-    .await?;
+                    socket_final(
+                        &mut xml_reader,
+                        &mut xml_writer,
+                        &mut reader_buf,
+                        &authenticated,
+                        &mut connection,
+                        &rooms,
+                    )
+                    .await?;
+                },
+                Err(err) => {
+                    log::error!("Authentication error: {:?}", err);
+                }
+            }
+        },
+    }
 
     let a = xml_reader.into_inner().into_inner();
     let b = xml_writer.into_inner();

crates/projection-xmpp/tests/lib.rs

@@ -1,3 +1,5 @@
+use std::io::ErrorKind;
+use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
 
@@ -6,7 +8,7 @@ use assert_matches::*;
 use prometheus::Registry as MetricsRegistry;
 use quick_xml::events::Event;
 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;
@@ -122,7 +124,7 @@ impl ServerCertVerifier for IgnoreCertVerification {
 
 #[tokio::test]
 async fn scenario_basic() -> Result<()> {
-    tracing_subscriber::fmt::init();
+    tracing_subscriber::fmt::try_init();
     let config = ServerConfig {
         listen_on: "127.0.0.1:0".parse().unwrap(),
         cert: "tests/certs/xmpp.pem".parse().unwrap(),
@@ -184,3 +186,61 @@ async fn scenario_basic() -> Result<()> {
     server.terminate().await?;
     Ok(())
 }
+
+#[tokio::test]
+async fn terminate_socket() -> Result<()> {
+    tracing_subscriber::fmt::try_init();
+    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();
+    let address: SocketAddr = ("127.0.0.1:0".parse().unwrap());
+    // test scenario
+
+    storage.create_user("tester").await?;
+    storage.set_password("tester", "password").await?;
+
+    let mut stream = TcpStream::connect(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!(b.local_name().into_inner(), b"features"));
+    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"));
+    let buffer = s.buffer;
+
+    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.addr.ip()), stream).await?;
+    tracing::info!("TLS connection established");
+
+    server.terminate().await?;
+
+    assert_eq!(stream.read_u8().await.unwrap_err().kind(), ErrorKind::UnexpectedEof);
+
+    Ok(())
+}

crates/proto-irc/src/client.rs

@@ -7,42 +7,42 @@ use nonempty::NonEmpty;
 /// 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>
+    /// `TOPIC <chan> :<topic>`
     Topic {
         chan: Chan,
         topic: Str,
@@ -51,12 +51,12 @@ pub enum ClientMessage {
         chan: Chan,
         message: Str,
     },
-    /// PRIVMSG <target> :<msg>
+    /// `PRIVMSG <target> :<msg>`
     PrivateMessage {
         recipient: Recipient,
         body: Str,
     },
-    /// QUIT :<reason>
+    /// `QUIT :<reason>`
     Quit {
         reason: Str,
     },

crates/proto-irc/src/lib.rs

@@ -30,11 +30,15 @@ fn token(input: &str) -> IResult<&str, &str> {
     take_while(|i| i != '\n' && i != '\r')(input)
 }
 
+fn params(input: &str) -> IResult<&str, &str> {
+    take_while(|i| i != '\n' && i != '\r' && i != ':')(input)
+}
+
 #[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 {
@@ -114,9 +118,7 @@ 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());
     }
@@ -130,9 +132,7 @@ 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());
     }
@@ -146,9 +146,7 @@ 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/server.rs

@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use nonempty::NonEmpty;
 use tokio::io::AsyncWrite;
 use tokio::io::AsyncWriteExt;
@@ -152,7 +154,11 @@ pub enum ServerMessageBody {
     N903SaslSuccess {
         nick: Str,
         message: Str,
-    }
+    },
+    N904SaslFail {
+        nick: Str,
+        text: Str,
+    },
 }
 
 impl ServerMessageBody {
@@ -267,11 +273,7 @@ impl ServerMessageBody {
                 writer.write_all(b" :").await?;
                 writer.write_all(msg.as_bytes()).await?;
             }
-            ServerMessageBody::N332Topic {
+            ServerMessageBody::N332Topic { client, chat, topic } => {
-                client,
-                chat,
-                topic,
-            } => {
                 writer.write_all(b"332 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" ").await?;
@@ -309,20 +311,14 @@ 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
+                    writer.write_all(member.prefix.to_string().as_bytes()).await?;
-                        .write_all(member.prefix.to_string().as_bytes())
-                        .await?;
                     writer.write_all(member.nick.as_bytes()).await?;
                     writer.write_all(b" ").await?;
                 }
@@ -334,11 +330,7 @@ impl ServerMessageBody {
                 chan.write_async(writer).await?;
                 writer.write_all(b" :End of /NAMES list").await?;
             }
-            ServerMessageBody::N474BannedFromChan {
+            ServerMessageBody::N474BannedFromChan { client, chan, message } => {
-                client,
-                chan,
-                message,
-            } => {
                 writer.write_all(b"474 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" ").await?;
@@ -353,7 +345,12 @@ 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?;
@@ -369,6 +366,13 @@ impl ServerMessageBody {
                 writer.write_all(b" :").await?;
                 writer.write_all(message.as_bytes()).await?;
             }
+            ServerMessageBody::N904SaslFail { nick, text } => {
+                writer.write_all(b"904").await?;
+                writer.write_all(b" ").await?;
+                writer.write_all(nick.as_bytes()).await?;
+                writer.write_all(b" :").await?;
+                writer.write_all(text.as_bytes()).await?;
+            }
         }
         Ok(())
     }

crates/proto-xmpp/src/bind.rs

@@ -42,27 +42,19 @@ 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();
         }
-        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,
-        })
     }
 }
 
@@ -137,9 +129,7 @@ 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::new(r#"bind xmlns="urn:ietf:params:xml:ns:xmpp-bind""#)),
-                r#"bind xmlns="urn:ietf:params:xml:ns:xmpp-bind""#,
-            )),
             Event::Start(BytesStart::new(r#"jid"#)),
             Event::Text(BytesText::new(self.0.to_string().as_str()).into_owned()),
             Event::End(BytesEnd::new("jid")),
@@ -156,23 +146,16 @@ mod tests {
 
     #[tokio::test]
     async fn parse_message() {
-        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.unwrap();
-            .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.unwrap();
-                        .read_resolved_event_into_async(&mut buf)
-                        .await
-                        .unwrap();
                     parser = next.consume(ns, &event);
                 }
             }

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;
 
@@ -174,11 +174,7 @@ 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);
             }

crates/proto-xmpp/src/lib.rs

@@ -1,21 +1,16 @@
-#![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 muc;
+mod prelude;
 pub mod roster;
 pub mod sasl;
 pub mod session;
 pub mod stanzaerror;
 pub mod stream;
 pub mod tls;
-mod prelude;
 pub mod xml;
 
 // Implemented as a macro instead of a fn due to borrowck limitations

crates/proto-xmpp/src/roster.rs

@@ -52,9 +52,6 @@ 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
-        ))));
     }
 }

crates/proto-xmpp/src/session.rs

@@ -25,9 +25,7 @@ impl Parser for SessionParser {
     ) -> Continuation<Self, Self::Output> {
         match self.0 {
             SessionParserInner::Initial => match event {
-                Event::Start(_) => {
+                Event::Start(_) => Continuation::Continue(SessionParser(SessionParserInner::InSession)),
-                    Continuation::Continue(SessionParser(SessionParserInner::InSession))
-                }
                 Event::Empty(_) => Continuation::Final(Ok(Session)),
                 _ => Continuation::Final(Err(anyhow!("Unexpected XML event: {event:?}"))),
             },
@@ -54,9 +52,6 @@ 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";
@@ -44,10 +44,7 @@ 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 +121,15 @@ 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 +137,10 @@ 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 +149,7 @@ 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(())
     }
 }
@@ -182,9 +163,7 @@ mod test {
         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 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.unwrap();
-            .await
-            .unwrap();
         assert_eq!(
             res,
             ClientStreamStart {

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

@@ -15,11 +15,7 @@ enum IgnoreParserInner {
 impl Parser for IgnoreParser {
     type Output = Result<Ignore>;
 
-    fn consume<'a>(
+    fn consume<'a>(self: Self, _: ResolveResult, event: &Event<'a>) -> Continuation<Self, Self::Output> {
-        self: Self,
-        _: ResolveResult,
-        event: &Event<'a>,
-    ) -> Continuation<Self, Self::Output> {
         match self.0 {
             IgnoreParserInner::Initial => match event {
                 Event::Start(bytes) => {
@@ -34,13 +30,7 @@ impl Parser for IgnoreParser {
                     if depth == 0 {
                         Continuation::Final(Ok(Ignore))
                     } else {
-                        Continuation::Continue(
+                        Continuation::Continue(IgnoreParserInner::InTag { name, depth: depth - 1 }.into())
-                            IgnoreParserInner::InTag {
-                                name,
-                                depth: depth - 1,
-                            }
-                            .into(),
-                        )
                     }
                 }
                 _ => Continuation::Continue(IgnoreParserInner::InTag { name, depth }.into()),

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

@@ -1,9 +1,9 @@
 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;
 
@@ -28,25 +28,16 @@ pub trait FromXmlTag: FromXml {
 pub trait Parser: Sized {
     type Output;
 
-    fn consume<'a>(
+    fn consume<'a>(self: Self, namespace: ResolveResult, event: &Event<'a>) -> Continuation<Self, Self::Output>;
-        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>>)

rust-toolchain

@@ -1 +1 @@
-nightly-2023-12-07
+nightly-2024-03-20

rustfmt.toml

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

src/main.rs

@@ -62,7 +62,14 @@ async fn main() -> Result<()> {
         storage.clone(),
     )
     .await?;
-    let xmpp = projection_xmpp::launch(xmpp_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;