implement persistent memberships

crates/lavina-core/src/player.rs

@@ -7,16 +7,16 @@
 //!
 //! 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},
+use std::sync::Arc;
-    sync::{Arc, RwLock},
-};
 
 use prometheus::{IntGauge, Registry as MetricsRegistry};
 use serde::Serialize;
 use tokio::sync::mpsc::{channel, Receiver, Sender};
+use tokio::sync::RwLock;
 
 use crate::prelude::*;
+use crate::repo::Storage;
 use crate::room::{RoomHandle, RoomId, RoomInfo, RoomRegistry};
 use crate::table::{AnonTable, Key as AnonKey};
 
@@ -208,23 +208,28 @@ pub enum Updates {
 #[derive(Clone)]
 pub struct PlayerRegistry(Arc<RwLock<PlayerRegistryInner>>);
 impl PlayerRegistry {
-    pub fn empty(room_registry: RoomRegistry, metrics: &mut MetricsRegistry) -> Result<PlayerRegistry> {
+    pub fn empty(
+        room_registry: RoomRegistry,
+        storage: Storage,
+        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,
+            storage,
             players: HashMap::new(),
             metric_active_players,
         };
         Ok(PlayerRegistry(Arc::new(RwLock::new(inner))))
     }
 
-    pub async fn get_or_create_player(&mut self, id: PlayerId) -> PlayerHandle {
+    pub async fn get_or_launch_player(&mut self, id: PlayerId) -> PlayerHandle {
-        let mut inner = self.0.write().unwrap();
+        let mut inner = self.0.write().await;
         if let Some((handle, _)) = inner.players.get(&id) {
             handle.clone()
         } else {
-            let (handle, fiber) = Player::launch(id.clone(), inner.room_registry.clone());
+            let (handle, fiber) = Player::launch(id.clone(), inner.room_registry.clone(), inner.storage.clone()).await;
             inner.players.insert(id, (handle.clone(), fiber));
             inner.metric_active_players.inc();
             handle
@@ -232,12 +237,12 @@ impl PlayerRegistry {
     }
 
     pub async fn connect_to_player(&mut self, id: PlayerId) -> PlayerConnection {
-        let player_handle = self.get_or_create_player(id).await;
+        let player_handle = self.get_or_launch_player(id).await;
         player_handle.subscribe().await
     }
 
     pub async fn shutdown_all(&mut self) -> Result<()> {
-        let mut inner = self.0.write().unwrap();
+        let mut inner = self.0.write().await;
         for (i, (k, j)) in inner.players.drain() {
             k.send(ActorCommand::Stop).await;
             drop(k);
@@ -252,6 +257,8 @@ impl PlayerRegistry {
 /// The player registry state representation.
 struct PlayerRegistryInner {
     room_registry: RoomRegistry,
+    storage: Storage,
+    /// Active player actors.
     players: HashMap<PlayerId, (PlayerHandle, JoinHandle<Player>)>,
     metric_active_players: IntGauge,
 }
@@ -259,26 +266,31 @@ struct PlayerRegistryInner {
 /// Player actor inner state representation.
 struct Player {
     player_id: PlayerId,
+    storage_id: u32,
     connections: AnonTable<Sender<Updates>>,
     my_rooms: HashMap<RoomId, RoomHandle>,
     banned_from: HashSet<RoomId>,
     rx: Receiver<ActorCommand>,
     handle: PlayerHandle,
     rooms: RoomRegistry,
+    storage: Storage,
 }
 impl Player {
-    fn launch(player_id: PlayerId, rooms: RoomRegistry) -> (PlayerHandle, JoinHandle<Player>) {
+    async fn launch(player_id: PlayerId, rooms: RoomRegistry, storage: Storage) -> (PlayerHandle, JoinHandle<Player>) {
         let (tx, rx) = channel(32);
         let handle = PlayerHandle { tx };
         let handle_clone = handle.clone();
+        let storage_id = storage.retrieve_user_id_by_name(player_id.as_inner()).await.unwrap().unwrap();
         let player = Player {
             player_id,
+            storage_id,
             connections: AnonTable::new(),
             my_rooms: HashMap::new(),
-            banned_from: HashSet::from([RoomId::from("Empty").unwrap()]),
+            banned_from: HashSet::new(),
             rx,
             handle,
             rooms,
+            storage,
         };
         let fiber = tokio::task::spawn(player.main_loop());
         (handle_clone, fiber)
@@ -372,6 +384,7 @@ impl Player {
                 todo!();
             }
         };
+        room.add_member(self.player_id.clone(), self.storage_id).await;
         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;
@@ -387,6 +400,7 @@ impl Player {
         let room = self.my_rooms.remove(&room_id);
         if let Some(room) = room {
             room.unsubscribe(&self.player_id).await;
+            room.remove_member(&self.player_id).await;
         }
         let update = Updates::RoomLeft {
             room_id,
@@ -396,12 +410,11 @@ impl Player {
     }
 
     async fn send_message(&mut self, connection_id: ConnectionId, room_id: RoomId, body: Str) {
-        let room = self.rooms.get_room(&room_id).await;
+        let Some(room) = self.my_rooms.get(&room_id) else {
-        if let Some(room) = room {
-            room.send_message(self.player_id.clone(), body.clone()).await;
-        } else {
             tracing::info!("no room found");
-        }
+            return;
+        };
+        room.send_message(self.player_id.clone(), body.clone()).await;
         let update = Updates::NewMessage {
             room_id,
             author_id: self.player_id.clone(),
@@ -411,12 +424,11 @@ impl Player {
     }
 
     async fn change_topic(&mut self, connection_id: ConnectionId, room_id: RoomId, new_topic: Str) {
-        let room = self.rooms.get_room(&room_id).await;
+        let Some(room) = self.my_rooms.get(&room_id) else {
-        if let Some(mut room) = room {
-            room.set_topic(self.player_id.clone(), new_topic.clone()).await;
-        } else {
             tracing::info!("no room found");
-        }
+            return;
+        };
+        room.set_topic(self.player_id.clone(), new_topic.clone()).await;
         let update = Updates::RoomTopicChanged { room_id, new_topic };
         self.broadcast_update(update, connection_id).await;
     }

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

@@ -11,6 +11,9 @@ use tokio::sync::Mutex;
 
 use crate::prelude::*;
 
+mod user;
+mod room;
+
 #[derive(Deserialize, Debug, Clone)]
 pub struct StorageConfig {
     pub db_path: String,

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

@@ -0,0 +1,19 @@
+use anyhow::Result;
+
+use crate::repo::Storage;
+
+impl Storage {
+    pub async fn add_room_member(&mut 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(())
+    }
+}

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

@@ -0,0 +1,15 @@
+use anyhow::Result;
+
+use crate::repo::Storage;
+
+impl Storage {
+    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))
+    }
+}

crates/lavina-core/src/room.rs

@@ -1,4 +1,5 @@
 //! Domain of rooms — chats with multiple participants.
+use std::collections::HashSet;
 use std::{collections::HashMap, hash::Hash, sync::Arc};
 
 use prometheus::{IntGauge, Registry as MetricRegistry};
@@ -59,6 +60,7 @@ impl RoomRegistry {
                 storage_id: stored_room.id,
                 room_id: room_id.clone(),
                 subscriptions: HashMap::new(), // TODO figure out how to populate subscriptions
+                members: HashSet::new(),       // TODO load members from storage
                 topic: stored_room.topic.into(),
                 message_count: stored_room.message_count,
                 storage: inner.storage.clone(),
@@ -76,6 +78,7 @@ impl RoomRegistry {
                 storage_id: id,
                 room_id: room_id.clone(),
                 subscriptions: HashMap::new(),
+                members: HashSet::new(),
                 topic: topic.into(),
                 message_count: 0,
                 storage: inner.storage.clone(),
@@ -118,12 +121,32 @@ pub struct RoomHandle(Arc<AsyncRwLock<Room>>);
 impl RoomHandle {
     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);
+    }
+
+    pub async fn add_member(&self, player_id: PlayerId, player_storage_id: u32) {
+        let mut lock = self.0.write().await;
+        tracing::info!("Adding a new member to a room");
+        let storage_id = lock.storage_id;
+        lock.members.insert(player_id.clone());
+        lock.storage.add_room_member(&storage_id, &player_storage_id).await.unwrap();
+        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 unsubscribe(&self, player_id: &PlayerId) {
         let mut lock = self.0.write().await;
         lock.subscriptions.remove(player_id);
+    }
+
+    pub async fn remove_member(&self, player_id: &PlayerId) {
+        let mut lock = self.0.write().await;
+        tracing::info!("Removing a member from a room");
+        lock.members.remove(player_id);
         let update = Updates::RoomLeft {
             room_id: lock.room_id.clone(),
             former_member_id: player_id.clone(),
@@ -148,7 +171,7 @@ impl RoomHandle {
         }
     }
 
-    pub async fn set_topic(&mut self, changer_id: PlayerId, new_topic: Str) {
+    pub async fn set_topic(&self, changer_id: PlayerId, new_topic: Str) {
         let mut lock = self.0.write().await;
         lock.topic = new_topic.clone();
         let update = Updates::RoomTopicChanged {
@@ -166,22 +189,14 @@ struct 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<()> {
         tracing::info!("Adding a message to room");
         self.storage.insert_message(self.storage_id, self.message_count, &body, &*author_id.as_inner()).await?;

crates/projection-irc/tests/lib.rs

@@ -111,7 +111,36 @@ impl TestServer {
         })
         .await?;
         let rooms = RoomRegistry::new(&mut metrics, storage.clone()).unwrap();
-        let players = PlayerRegistry::empty(rooms.clone(), &mut metrics).unwrap();
+        let players = PlayerRegistry::empty(rooms.clone(), storage.clone(), &mut metrics).unwrap();
+        let server = launch(config, players.clone(), rooms.clone(), metrics.clone(), storage.clone()).await.unwrap();
+        Ok(TestServer {
+            metrics,
+            storage,
+            rooms,
+            players,
+            server,
+        })
+    }
+
+    async fn reboot(mut self) -> Result<TestServer> {
+        let config = ServerConfig {
+            listen_on: "127.0.0.1:0".parse().unwrap(),
+            server_name: "testserver".into(),
+        };
+        let TestServer {
+            mut metrics,
+            mut storage,
+            rooms,
+            mut players,
+            server,
+        } = self;
+        server.terminate().await?;
+        players.shutdown_all().await.unwrap();
+        drop(players);
+        drop(rooms);
+        let mut metrics = MetricsRegistry::new();
+        let rooms = RoomRegistry::new(&mut metrics, storage.clone()).unwrap();
+        let players = PlayerRegistry::empty(rooms.clone(), storage.clone(), &mut metrics).unwrap();
         let server = launch(config, players.clone(), rooms.clone(), metrics.clone(), storage.clone()).await.unwrap();
         Ok(TestServer {
             metrics,
@@ -152,6 +181,76 @@ async fn scenario_basic() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test]
+async fn scenario_join_and_reboot() -> 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);
+
+    // 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.server.terminate().await?;
+    Ok(())
+}
+
 #[tokio::test]
 async fn scenario_force_join_msg() -> Result<()> {
     let mut server = TestServer::start().await?;
@@ -407,7 +506,6 @@ async fn scenario_cap_sasl_fail() -> Result<()> {
 #[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
 

crates/projection-xmpp/tests/lib.rs

@@ -142,7 +142,7 @@ impl TestServer {
         })
         .await?;
         let rooms = RoomRegistry::new(&mut metrics, storage.clone()).unwrap();
-        let players = PlayerRegistry::empty(rooms.clone(), &mut metrics).unwrap();
+        let players = PlayerRegistry::empty(rooms.clone(), storage.clone(), &mut metrics).unwrap();
         let server = launch(config, players.clone(), rooms.clone(), metrics.clone(), storage.clone()).await.unwrap();
         Ok(TestServer {
             metrics,

src/main.rs

@@ -52,7 +52,7 @@ async fn main() -> Result<()> {
     let mut metrics = MetricsRegistry::new();
     let storage = Storage::open(storage_config).await?;
     let rooms = RoomRegistry::new(&mut metrics, storage.clone())?;
-    let mut players = PlayerRegistry::empty(rooms.clone(), &mut metrics)?;
+    let mut players = PlayerRegistry::empty(rooms.clone(), storage.clone(), &mut metrics)?;
     let telemetry_terminator = http::launch(telemetry_config, metrics.clone(), rooms.clone(), storage.clone()).await?;
     let irc = projection_irc::launch(
         irc_config,