1mod connection_pool;
   2
   3use crate::{
   4    auth,
   5    db::{
   6        self, ChannelId, ChannelsForUser, Database, MessageId, ProjectId, RoomId, ServerId, User,
   7        UserId,
   8    },
   9    executor::Executor,
  10    AppState, Result,
  11};
  12use anyhow::anyhow;
  13use async_tungstenite::tungstenite::{
  14    protocol::CloseFrame as TungsteniteCloseFrame, Message as TungsteniteMessage,
  15};
  16use axum::{
  17    body::Body,
  18    extract::{
  19        ws::{CloseFrame as AxumCloseFrame, Message as AxumMessage},
  20        ConnectInfo, WebSocketUpgrade,
  21    },
  22    headers::{Header, HeaderName},
  23    http::StatusCode,
  24    middleware,
  25    response::IntoResponse,
  26    routing::get,
  27    Extension, Router, TypedHeader,
  28};
  29use collections::{HashMap, HashSet};
  30pub use connection_pool::ConnectionPool;
  31use futures::{
  32    channel::oneshot,
  33    future::{self, BoxFuture},
  34    stream::FuturesUnordered,
  35    FutureExt, SinkExt, StreamExt, TryStreamExt,
  36};
  37use lazy_static::lazy_static;
  38use prometheus::{register_int_gauge, IntGauge};
  39use rpc::{
  40    proto::{
  41        self, Ack, AnyTypedEnvelope, ChannelEdge, EntityMessage, EnvelopedMessage,
  42        LiveKitConnectionInfo, RequestMessage, UpdateChannelBufferCollaborators,
  43    },
  44    Connection, ConnectionId, Peer, Receipt, TypedEnvelope,
  45};
  46use serde::{Serialize, Serializer};
  47use std::{
  48    any::TypeId,
  49    fmt,
  50    future::Future,
  51    marker::PhantomData,
  52    mem,
  53    net::SocketAddr,
  54    ops::{Deref, DerefMut},
  55    rc::Rc,
  56    sync::{
  57        atomic::{AtomicBool, Ordering::SeqCst},
  58        Arc,
  59    },
  60    time::{Duration, Instant},
  61};
  62use time::OffsetDateTime;
  63use tokio::sync::{watch, Semaphore};
  64use tower::ServiceBuilder;
  65use tracing::{info_span, instrument, Instrument};
  66
  67pub const RECONNECT_TIMEOUT: Duration = Duration::from_secs(30);
  68pub const CLEANUP_TIMEOUT: Duration = Duration::from_secs(10);
  69
  70const MESSAGE_COUNT_PER_PAGE: usize = 100;
  71const MAX_MESSAGE_LEN: usize = 1024;
  72
  73lazy_static! {
  74    static ref METRIC_CONNECTIONS: IntGauge =
  75        register_int_gauge!("connections", "number of connections").unwrap();
  76    static ref METRIC_SHARED_PROJECTS: IntGauge = register_int_gauge!(
  77        "shared_projects",
  78        "number of open projects with one or more guests"
  79    )
  80    .unwrap();
  81}
  82
  83type MessageHandler =
  84    Box<dyn Send + Sync + Fn(Box<dyn AnyTypedEnvelope>, Session) -> BoxFuture<'static, ()>>;
  85
  86struct Response<R> {
  87    peer: Arc<Peer>,
  88    receipt: Receipt<R>,
  89    responded: Arc<AtomicBool>,
  90}
  91
  92impl<R: RequestMessage> Response<R> {
  93    fn send(self, payload: R::Response) -> Result<()> {
  94        self.responded.store(true, SeqCst);
  95        self.peer.respond(self.receipt, payload)?;
  96        Ok(())
  97    }
  98}
  99
 100#[derive(Clone)]
 101struct Session {
 102    user_id: UserId,
 103    connection_id: ConnectionId,
 104    db: Arc<tokio::sync::Mutex<DbHandle>>,
 105    peer: Arc<Peer>,
 106    connection_pool: Arc<parking_lot::Mutex<ConnectionPool>>,
 107    live_kit_client: Option<Arc<dyn live_kit_server::api::Client>>,
 108    executor: Executor,
 109}
 110
 111impl Session {
 112    async fn db(&self) -> tokio::sync::MutexGuard<DbHandle> {
 113        #[cfg(test)]
 114        tokio::task::yield_now().await;
 115        let guard = self.db.lock().await;
 116        #[cfg(test)]
 117        tokio::task::yield_now().await;
 118        guard
 119    }
 120
 121    async fn connection_pool(&self) -> ConnectionPoolGuard<'_> {
 122        #[cfg(test)]
 123        tokio::task::yield_now().await;
 124        let guard = self.connection_pool.lock();
 125        ConnectionPoolGuard {
 126            guard,
 127            _not_send: PhantomData,
 128        }
 129    }
 130}
 131
 132impl fmt::Debug for Session {
 133    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 134        f.debug_struct("Session")
 135            .field("user_id", &self.user_id)
 136            .field("connection_id", &self.connection_id)
 137            .finish()
 138    }
 139}
 140
 141struct DbHandle(Arc<Database>);
 142
 143impl Deref for DbHandle {
 144    type Target = Database;
 145
 146    fn deref(&self) -> &Self::Target {
 147        self.0.as_ref()
 148    }
 149}
 150
 151pub struct Server {
 152    id: parking_lot::Mutex<ServerId>,
 153    peer: Arc<Peer>,
 154    pub(crate) connection_pool: Arc<parking_lot::Mutex<ConnectionPool>>,
 155    app_state: Arc<AppState>,
 156    executor: Executor,
 157    handlers: HashMap<TypeId, MessageHandler>,
 158    teardown: watch::Sender<()>,
 159}
 160
 161pub(crate) struct ConnectionPoolGuard<'a> {
 162    guard: parking_lot::MutexGuard<'a, ConnectionPool>,
 163    _not_send: PhantomData<Rc<()>>,
 164}
 165
 166#[derive(Serialize)]
 167pub struct ServerSnapshot<'a> {
 168    peer: &'a Peer,
 169    #[serde(serialize_with = "serialize_deref")]
 170    connection_pool: ConnectionPoolGuard<'a>,
 171}
 172
 173pub fn serialize_deref<S, T, U>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
 174where
 175    S: Serializer,
 176    T: Deref<Target = U>,
 177    U: Serialize,
 178{
 179    Serialize::serialize(value.deref(), serializer)
 180}
 181
 182impl Server {
 183    pub fn new(id: ServerId, app_state: Arc<AppState>, executor: Executor) -> Arc<Self> {
 184        let mut server = Self {
 185            id: parking_lot::Mutex::new(id),
 186            peer: Peer::new(id.0 as u32),
 187            app_state,
 188            executor,
 189            connection_pool: Default::default(),
 190            handlers: Default::default(),
 191            teardown: watch::channel(()).0,
 192        };
 193
 194        server
 195            .add_request_handler(ping)
 196            .add_request_handler(create_room)
 197            .add_request_handler(join_room)
 198            .add_request_handler(rejoin_room)
 199            .add_request_handler(leave_room)
 200            .add_request_handler(call)
 201            .add_request_handler(cancel_call)
 202            .add_message_handler(decline_call)
 203            .add_request_handler(update_participant_location)
 204            .add_request_handler(share_project)
 205            .add_message_handler(unshare_project)
 206            .add_request_handler(join_project)
 207            .add_message_handler(leave_project)
 208            .add_request_handler(update_project)
 209            .add_request_handler(update_worktree)
 210            .add_message_handler(start_language_server)
 211            .add_message_handler(update_language_server)
 212            .add_message_handler(update_diagnostic_summary)
 213            .add_message_handler(update_worktree_settings)
 214            .add_message_handler(refresh_inlay_hints)
 215            .add_request_handler(forward_project_request::<proto::GetHover>)
 216            .add_request_handler(forward_project_request::<proto::GetDefinition>)
 217            .add_request_handler(forward_project_request::<proto::GetTypeDefinition>)
 218            .add_request_handler(forward_project_request::<proto::GetReferences>)
 219            .add_request_handler(forward_project_request::<proto::SearchProject>)
 220            .add_request_handler(forward_project_request::<proto::GetDocumentHighlights>)
 221            .add_request_handler(forward_project_request::<proto::GetProjectSymbols>)
 222            .add_request_handler(forward_project_request::<proto::OpenBufferForSymbol>)
 223            .add_request_handler(forward_project_request::<proto::OpenBufferById>)
 224            .add_request_handler(forward_project_request::<proto::OpenBufferByPath>)
 225            .add_request_handler(forward_project_request::<proto::GetCompletions>)
 226            .add_request_handler(forward_project_request::<proto::ApplyCompletionAdditionalEdits>)
 227            .add_request_handler(forward_project_request::<proto::GetCodeActions>)
 228            .add_request_handler(forward_project_request::<proto::ApplyCodeAction>)
 229            .add_request_handler(forward_project_request::<proto::PrepareRename>)
 230            .add_request_handler(forward_project_request::<proto::PerformRename>)
 231            .add_request_handler(forward_project_request::<proto::ReloadBuffers>)
 232            .add_request_handler(forward_project_request::<proto::SynchronizeBuffers>)
 233            .add_request_handler(forward_project_request::<proto::FormatBuffers>)
 234            .add_request_handler(forward_project_request::<proto::CreateProjectEntry>)
 235            .add_request_handler(forward_project_request::<proto::RenameProjectEntry>)
 236            .add_request_handler(forward_project_request::<proto::CopyProjectEntry>)
 237            .add_request_handler(forward_project_request::<proto::DeleteProjectEntry>)
 238            .add_request_handler(forward_project_request::<proto::ExpandProjectEntry>)
 239            .add_request_handler(forward_project_request::<proto::OnTypeFormatting>)
 240            .add_request_handler(forward_project_request::<proto::InlayHints>)
 241            .add_message_handler(create_buffer_for_peer)
 242            .add_request_handler(update_buffer)
 243            .add_message_handler(update_buffer_file)
 244            .add_message_handler(buffer_reloaded)
 245            .add_message_handler(buffer_saved)
 246            .add_request_handler(forward_project_request::<proto::SaveBuffer>)
 247            .add_request_handler(get_users)
 248            .add_request_handler(fuzzy_search_users)
 249            .add_request_handler(request_contact)
 250            .add_request_handler(remove_contact)
 251            .add_request_handler(respond_to_contact_request)
 252            .add_request_handler(create_channel)
 253            .add_request_handler(delete_channel)
 254            .add_request_handler(invite_channel_member)
 255            .add_request_handler(remove_channel_member)
 256            .add_request_handler(set_channel_member_admin)
 257            .add_request_handler(rename_channel)
 258            .add_request_handler(join_channel_buffer)
 259            .add_request_handler(leave_channel_buffer)
 260            .add_message_handler(update_channel_buffer)
 261            .add_request_handler(rejoin_channel_buffers)
 262            .add_request_handler(get_channel_members)
 263            .add_request_handler(respond_to_channel_invite)
 264            .add_request_handler(join_channel)
 265            .add_request_handler(join_channel_chat)
 266            .add_message_handler(leave_channel_chat)
 267            .add_request_handler(send_channel_message)
 268            .add_request_handler(remove_channel_message)
 269            .add_request_handler(get_channel_messages)
 270            .add_request_handler(link_channel)
 271            .add_request_handler(unlink_channel)
 272            .add_request_handler(move_channel)
 273            .add_request_handler(follow)
 274            .add_message_handler(unfollow)
 275            .add_message_handler(update_followers)
 276            .add_message_handler(update_diff_base)
 277            .add_request_handler(get_private_user_info);
 278
 279        Arc::new(server)
 280    }
 281
 282    pub async fn start(&self) -> Result<()> {
 283        let server_id = *self.id.lock();
 284        let app_state = self.app_state.clone();
 285        let peer = self.peer.clone();
 286        let timeout = self.executor.sleep(CLEANUP_TIMEOUT);
 287        let pool = self.connection_pool.clone();
 288        let live_kit_client = self.app_state.live_kit_client.clone();
 289
 290        let span = info_span!("start server");
 291        self.executor.spawn_detached(
 292            async move {
 293                tracing::info!("waiting for cleanup timeout");
 294                timeout.await;
 295                tracing::info!("cleanup timeout expired, retrieving stale rooms");
 296                if let Some((room_ids, channel_ids)) = app_state
 297                    .db
 298                    .stale_server_resource_ids(&app_state.config.zed_environment, server_id)
 299                    .await
 300                    .trace_err()
 301                {
 302                    tracing::info!(stale_room_count = room_ids.len(), "retrieved stale rooms");
 303                    tracing::info!(
 304                        stale_channel_buffer_count = channel_ids.len(),
 305                        "retrieved stale channel buffers"
 306                    );
 307
 308                    for channel_id in channel_ids {
 309                        if let Some(refreshed_channel_buffer) = app_state
 310                            .db
 311                            .clear_stale_channel_buffer_collaborators(channel_id, server_id)
 312                            .await
 313                            .trace_err()
 314                        {
 315                            for connection_id in refreshed_channel_buffer.connection_ids {
 316                                peer.send(
 317                                    connection_id,
 318                                    proto::UpdateChannelBufferCollaborators {
 319                                        channel_id: channel_id.to_proto(),
 320                                        collaborators: refreshed_channel_buffer
 321                                            .collaborators
 322                                            .clone(),
 323                                    },
 324                                )
 325                                .trace_err();
 326                            }
 327                        }
 328                    }
 329
 330                    for room_id in room_ids {
 331                        let mut contacts_to_update = HashSet::default();
 332                        let mut canceled_calls_to_user_ids = Vec::new();
 333                        let mut live_kit_room = String::new();
 334                        let mut delete_live_kit_room = false;
 335
 336                        if let Some(mut refreshed_room) = app_state
 337                            .db
 338                            .clear_stale_room_participants(room_id, server_id)
 339                            .await
 340                            .trace_err()
 341                        {
 342                            tracing::info!(
 343                                room_id = room_id.0,
 344                                new_participant_count = refreshed_room.room.participants.len(),
 345                                "refreshed room"
 346                            );
 347                            room_updated(&refreshed_room.room, &peer);
 348                            if let Some(channel_id) = refreshed_room.channel_id {
 349                                channel_updated(
 350                                    channel_id,
 351                                    &refreshed_room.room,
 352                                    &refreshed_room.channel_members,
 353                                    &peer,
 354                                    &*pool.lock(),
 355                                );
 356                            }
 357                            contacts_to_update
 358                                .extend(refreshed_room.stale_participant_user_ids.iter().copied());
 359                            contacts_to_update
 360                                .extend(refreshed_room.canceled_calls_to_user_ids.iter().copied());
 361                            canceled_calls_to_user_ids =
 362                                mem::take(&mut refreshed_room.canceled_calls_to_user_ids);
 363                            live_kit_room = mem::take(&mut refreshed_room.room.live_kit_room);
 364                            delete_live_kit_room = refreshed_room.room.participants.is_empty();
 365                        }
 366
 367                        {
 368                            let pool = pool.lock();
 369                            for canceled_user_id in canceled_calls_to_user_ids {
 370                                for connection_id in pool.user_connection_ids(canceled_user_id) {
 371                                    peer.send(
 372                                        connection_id,
 373                                        proto::CallCanceled {
 374                                            room_id: room_id.to_proto(),
 375                                        },
 376                                    )
 377                                    .trace_err();
 378                                }
 379                            }
 380                        }
 381
 382                        for user_id in contacts_to_update {
 383                            let busy = app_state.db.is_user_busy(user_id).await.trace_err();
 384                            let contacts = app_state.db.get_contacts(user_id).await.trace_err();
 385                            if let Some((busy, contacts)) = busy.zip(contacts) {
 386                                let pool = pool.lock();
 387                                let updated_contact = contact_for_user(user_id, false, busy, &pool);
 388                                for contact in contacts {
 389                                    if let db::Contact::Accepted {
 390                                        user_id: contact_user_id,
 391                                        ..
 392                                    } = contact
 393                                    {
 394                                        for contact_conn_id in
 395                                            pool.user_connection_ids(contact_user_id)
 396                                        {
 397                                            peer.send(
 398                                                contact_conn_id,
 399                                                proto::UpdateContacts {
 400                                                    contacts: vec![updated_contact.clone()],
 401                                                    remove_contacts: Default::default(),
 402                                                    incoming_requests: Default::default(),
 403                                                    remove_incoming_requests: Default::default(),
 404                                                    outgoing_requests: Default::default(),
 405                                                    remove_outgoing_requests: Default::default(),
 406                                                },
 407                                            )
 408                                            .trace_err();
 409                                        }
 410                                    }
 411                                }
 412                            }
 413                        }
 414
 415                        if let Some(live_kit) = live_kit_client.as_ref() {
 416                            if delete_live_kit_room {
 417                                live_kit.delete_room(live_kit_room).await.trace_err();
 418                            }
 419                        }
 420                    }
 421                }
 422
 423                app_state
 424                    .db
 425                    .delete_stale_servers(&app_state.config.zed_environment, server_id)
 426                    .await
 427                    .trace_err();
 428            }
 429            .instrument(span),
 430        );
 431        Ok(())
 432    }
 433
 434    pub fn teardown(&self) {
 435        self.peer.teardown();
 436        self.connection_pool.lock().reset();
 437        let _ = self.teardown.send(());
 438    }
 439
 440    #[cfg(test)]
 441    pub fn reset(&self, id: ServerId) {
 442        self.teardown();
 443        *self.id.lock() = id;
 444        self.peer.reset(id.0 as u32);
 445    }
 446
 447    #[cfg(test)]
 448    pub fn id(&self) -> ServerId {
 449        *self.id.lock()
 450    }
 451
 452    fn add_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
 453    where
 454        F: 'static + Send + Sync + Fn(TypedEnvelope<M>, Session) -> Fut,
 455        Fut: 'static + Send + Future<Output = Result<()>>,
 456        M: EnvelopedMessage,
 457    {
 458        let prev_handler = self.handlers.insert(
 459            TypeId::of::<M>(),
 460            Box::new(move |envelope, session| {
 461                let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
 462                let span = info_span!(
 463                    "handle message",
 464                    payload_type = envelope.payload_type_name()
 465                );
 466                span.in_scope(|| {
 467                    tracing::info!(
 468                        payload_type = envelope.payload_type_name(),
 469                        "message received"
 470                    );
 471                });
 472                let start_time = Instant::now();
 473                let future = (handler)(*envelope, session);
 474                async move {
 475                    let result = future.await;
 476                    let duration_ms = start_time.elapsed().as_micros() as f64 / 1000.0;
 477                    match result {
 478                        Err(error) => {
 479                            tracing::error!(%error, ?duration_ms, "error handling message")
 480                        }
 481                        Ok(()) => tracing::info!(?duration_ms, "finished handling message"),
 482                    }
 483                }
 484                .instrument(span)
 485                .boxed()
 486            }),
 487        );
 488        if prev_handler.is_some() {
 489            panic!("registered a handler for the same message twice");
 490        }
 491        self
 492    }
 493
 494    fn add_message_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
 495    where
 496        F: 'static + Send + Sync + Fn(M, Session) -> Fut,
 497        Fut: 'static + Send + Future<Output = Result<()>>,
 498        M: EnvelopedMessage,
 499    {
 500        self.add_handler(move |envelope, session| handler(envelope.payload, session));
 501        self
 502    }
 503
 504    fn add_request_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
 505    where
 506        F: 'static + Send + Sync + Fn(M, Response<M>, Session) -> Fut,
 507        Fut: Send + Future<Output = Result<()>>,
 508        M: RequestMessage,
 509    {
 510        let handler = Arc::new(handler);
 511        self.add_handler(move |envelope, session| {
 512            let receipt = envelope.receipt();
 513            let handler = handler.clone();
 514            async move {
 515                let peer = session.peer.clone();
 516                let responded = Arc::new(AtomicBool::default());
 517                let response = Response {
 518                    peer: peer.clone(),
 519                    responded: responded.clone(),
 520                    receipt,
 521                };
 522                match (handler)(envelope.payload, response, session).await {
 523                    Ok(()) => {
 524                        if responded.load(std::sync::atomic::Ordering::SeqCst) {
 525                            Ok(())
 526                        } else {
 527                            Err(anyhow!("handler did not send a response"))?
 528                        }
 529                    }
 530                    Err(error) => {
 531                        peer.respond_with_error(
 532                            receipt,
 533                            proto::Error {
 534                                message: error.to_string(),
 535                            },
 536                        )?;
 537                        Err(error)
 538                    }
 539                }
 540            }
 541        })
 542    }
 543
 544    pub fn handle_connection(
 545        self: &Arc<Self>,
 546        connection: Connection,
 547        address: String,
 548        user: User,
 549        mut send_connection_id: Option<oneshot::Sender<ConnectionId>>,
 550        executor: Executor,
 551    ) -> impl Future<Output = Result<()>> {
 552        let this = self.clone();
 553        let user_id = user.id;
 554        let login = user.github_login;
 555        let span = info_span!("handle connection", %user_id, %login, %address);
 556        let mut teardown = self.teardown.subscribe();
 557        async move {
 558            let (connection_id, handle_io, mut incoming_rx) = this
 559                .peer
 560                .add_connection(connection, {
 561                    let executor = executor.clone();
 562                    move |duration| executor.sleep(duration)
 563                });
 564
 565            tracing::info!(%user_id, %login, %connection_id, %address, "connection opened");
 566            this.peer.send(connection_id, proto::Hello { peer_id: Some(connection_id.into()) })?;
 567            tracing::info!(%user_id, %login, %connection_id, %address, "sent hello message");
 568
 569            if let Some(send_connection_id) = send_connection_id.take() {
 570                let _ = send_connection_id.send(connection_id);
 571            }
 572
 573            if !user.connected_once {
 574                this.peer.send(connection_id, proto::ShowContacts {})?;
 575                this.app_state.db.set_user_connected_once(user_id, true).await?;
 576            }
 577
 578            let (contacts, channels_for_user, channel_invites) = future::try_join3(
 579                this.app_state.db.get_contacts(user_id),
 580                this.app_state.db.get_channels_for_user(user_id),
 581                this.app_state.db.get_channel_invites_for_user(user_id)
 582            ).await?;
 583
 584            {
 585                let mut pool = this.connection_pool.lock();
 586                pool.add_connection(connection_id, user_id, user.admin);
 587                this.peer.send(connection_id, build_initial_contacts_update(contacts, &pool))?;
 588                this.peer.send(connection_id, build_initial_channels_update(
 589                    channels_for_user,
 590                    channel_invites
 591                ))?;
 592            }
 593
 594            if let Some(incoming_call) = this.app_state.db.incoming_call_for_user(user_id).await? {
 595                this.peer.send(connection_id, incoming_call)?;
 596            }
 597
 598            let session = Session {
 599                user_id,
 600                connection_id,
 601                db: Arc::new(tokio::sync::Mutex::new(DbHandle(this.app_state.db.clone()))),
 602                peer: this.peer.clone(),
 603                connection_pool: this.connection_pool.clone(),
 604                live_kit_client: this.app_state.live_kit_client.clone(),
 605                executor: executor.clone(),
 606            };
 607            update_user_contacts(user_id, &session).await?;
 608
 609            let handle_io = handle_io.fuse();
 610            futures::pin_mut!(handle_io);
 611
 612            // Handlers for foreground messages are pushed into the following `FuturesUnordered`.
 613            // This prevents deadlocks when e.g., client A performs a request to client B and
 614            // client B performs a request to client A. If both clients stop processing further
 615            // messages until their respective request completes, they won't have a chance to
 616            // respond to the other client's request and cause a deadlock.
 617            //
 618            // This arrangement ensures we will attempt to process earlier messages first, but fall
 619            // back to processing messages arrived later in the spirit of making progress.
 620            let mut foreground_message_handlers = FuturesUnordered::new();
 621            let concurrent_handlers = Arc::new(Semaphore::new(256));
 622            loop {
 623                let next_message = async {
 624                    let permit = concurrent_handlers.clone().acquire_owned().await.unwrap();
 625                    let message = incoming_rx.next().await;
 626                    (permit, message)
 627                }.fuse();
 628                futures::pin_mut!(next_message);
 629                futures::select_biased! {
 630                    _ = teardown.changed().fuse() => return Ok(()),
 631                    result = handle_io => {
 632                        if let Err(error) = result {
 633                            tracing::error!(?error, %user_id, %login, %connection_id, %address, "error handling I/O");
 634                        }
 635                        break;
 636                    }
 637                    _ = foreground_message_handlers.next() => {}
 638                    next_message = next_message => {
 639                        let (permit, message) = next_message;
 640                        if let Some(message) = message {
 641                            let type_name = message.payload_type_name();
 642                            let span = tracing::info_span!("receive message", %user_id, %login, %connection_id, %address, type_name);
 643                            let span_enter = span.enter();
 644                            if let Some(handler) = this.handlers.get(&message.payload_type_id()) {
 645                                let is_background = message.is_background();
 646                                let handle_message = (handler)(message, session.clone());
 647                                drop(span_enter);
 648
 649                                let handle_message = async move {
 650                                    handle_message.await;
 651                                    drop(permit);
 652                                }.instrument(span);
 653                                if is_background {
 654                                    executor.spawn_detached(handle_message);
 655                                } else {
 656                                    foreground_message_handlers.push(handle_message);
 657                                }
 658                            } else {
 659                                tracing::error!(%user_id, %login, %connection_id, %address, "no message handler");
 660                            }
 661                        } else {
 662                            tracing::info!(%user_id, %login, %connection_id, %address, "connection closed");
 663                            break;
 664                        }
 665                    }
 666                }
 667            }
 668
 669            drop(foreground_message_handlers);
 670            tracing::info!(%user_id, %login, %connection_id, %address, "signing out");
 671            if let Err(error) = connection_lost(session, teardown, executor).await {
 672                tracing::error!(%user_id, %login, %connection_id, %address, ?error, "error signing out");
 673            }
 674
 675            Ok(())
 676        }.instrument(span)
 677    }
 678
 679    pub async fn invite_code_redeemed(
 680        self: &Arc<Self>,
 681        inviter_id: UserId,
 682        invitee_id: UserId,
 683    ) -> Result<()> {
 684        if let Some(user) = self.app_state.db.get_user_by_id(inviter_id).await? {
 685            if let Some(code) = &user.invite_code {
 686                let pool = self.connection_pool.lock();
 687                let invitee_contact = contact_for_user(invitee_id, true, false, &pool);
 688                for connection_id in pool.user_connection_ids(inviter_id) {
 689                    self.peer.send(
 690                        connection_id,
 691                        proto::UpdateContacts {
 692                            contacts: vec![invitee_contact.clone()],
 693                            ..Default::default()
 694                        },
 695                    )?;
 696                    self.peer.send(
 697                        connection_id,
 698                        proto::UpdateInviteInfo {
 699                            url: format!("{}{}", self.app_state.config.invite_link_prefix, &code),
 700                            count: user.invite_count as u32,
 701                        },
 702                    )?;
 703                }
 704            }
 705        }
 706        Ok(())
 707    }
 708
 709    pub async fn invite_count_updated(self: &Arc<Self>, user_id: UserId) -> Result<()> {
 710        if let Some(user) = self.app_state.db.get_user_by_id(user_id).await? {
 711            if let Some(invite_code) = &user.invite_code {
 712                let pool = self.connection_pool.lock();
 713                for connection_id in pool.user_connection_ids(user_id) {
 714                    self.peer.send(
 715                        connection_id,
 716                        proto::UpdateInviteInfo {
 717                            url: format!(
 718                                "{}{}",
 719                                self.app_state.config.invite_link_prefix, invite_code
 720                            ),
 721                            count: user.invite_count as u32,
 722                        },
 723                    )?;
 724                }
 725            }
 726        }
 727        Ok(())
 728    }
 729
 730    pub async fn snapshot<'a>(self: &'a Arc<Self>) -> ServerSnapshot<'a> {
 731        ServerSnapshot {
 732            connection_pool: ConnectionPoolGuard {
 733                guard: self.connection_pool.lock(),
 734                _not_send: PhantomData,
 735            },
 736            peer: &self.peer,
 737        }
 738    }
 739}
 740
 741impl<'a> Deref for ConnectionPoolGuard<'a> {
 742    type Target = ConnectionPool;
 743
 744    fn deref(&self) -> &Self::Target {
 745        &*self.guard
 746    }
 747}
 748
 749impl<'a> DerefMut for ConnectionPoolGuard<'a> {
 750    fn deref_mut(&mut self) -> &mut Self::Target {
 751        &mut *self.guard
 752    }
 753}
 754
 755impl<'a> Drop for ConnectionPoolGuard<'a> {
 756    fn drop(&mut self) {
 757        #[cfg(test)]
 758        self.check_invariants();
 759    }
 760}
 761
 762fn broadcast<F>(
 763    sender_id: Option<ConnectionId>,
 764    receiver_ids: impl IntoIterator<Item = ConnectionId>,
 765    mut f: F,
 766) where
 767    F: FnMut(ConnectionId) -> anyhow::Result<()>,
 768{
 769    for receiver_id in receiver_ids {
 770        if Some(receiver_id) != sender_id {
 771            if let Err(error) = f(receiver_id) {
 772                tracing::error!("failed to send to {:?} {}", receiver_id, error);
 773            }
 774        }
 775    }
 776}
 777
 778lazy_static! {
 779    static ref ZED_PROTOCOL_VERSION: HeaderName = HeaderName::from_static("x-zed-protocol-version");
 780}
 781
 782pub struct ProtocolVersion(u32);
 783
 784impl Header for ProtocolVersion {
 785    fn name() -> &'static HeaderName {
 786        &ZED_PROTOCOL_VERSION
 787    }
 788
 789    fn decode<'i, I>(values: &mut I) -> Result<Self, axum::headers::Error>
 790    where
 791        Self: Sized,
 792        I: Iterator<Item = &'i axum::http::HeaderValue>,
 793    {
 794        let version = values
 795            .next()
 796            .ok_or_else(axum::headers::Error::invalid)?
 797            .to_str()
 798            .map_err(|_| axum::headers::Error::invalid())?
 799            .parse()
 800            .map_err(|_| axum::headers::Error::invalid())?;
 801        Ok(Self(version))
 802    }
 803
 804    fn encode<E: Extend<axum::http::HeaderValue>>(&self, values: &mut E) {
 805        values.extend([self.0.to_string().parse().unwrap()]);
 806    }
 807}
 808
 809pub fn routes(server: Arc<Server>) -> Router<Body> {
 810    Router::new()
 811        .route("/rpc", get(handle_websocket_request))
 812        .layer(
 813            ServiceBuilder::new()
 814                .layer(Extension(server.app_state.clone()))
 815                .layer(middleware::from_fn(auth::validate_header)),
 816        )
 817        .route("/metrics", get(handle_metrics))
 818        .layer(Extension(server))
 819}
 820
 821pub async fn handle_websocket_request(
 822    TypedHeader(ProtocolVersion(protocol_version)): TypedHeader<ProtocolVersion>,
 823    ConnectInfo(socket_address): ConnectInfo<SocketAddr>,
 824    Extension(server): Extension<Arc<Server>>,
 825    Extension(user): Extension<User>,
 826    ws: WebSocketUpgrade,
 827) -> axum::response::Response {
 828    if protocol_version != rpc::PROTOCOL_VERSION {
 829        return (
 830            StatusCode::UPGRADE_REQUIRED,
 831            "client must be upgraded".to_string(),
 832        )
 833            .into_response();
 834    }
 835    let socket_address = socket_address.to_string();
 836    ws.on_upgrade(move |socket| {
 837        use util::ResultExt;
 838        let socket = socket
 839            .map_ok(to_tungstenite_message)
 840            .err_into()
 841            .with(|message| async move { Ok(to_axum_message(message)) });
 842        let connection = Connection::new(Box::pin(socket));
 843        async move {
 844            server
 845                .handle_connection(connection, socket_address, user, None, Executor::Production)
 846                .await
 847                .log_err();
 848        }
 849    })
 850}
 851
 852pub async fn handle_metrics(Extension(server): Extension<Arc<Server>>) -> Result<String> {
 853    let connections = server
 854        .connection_pool
 855        .lock()
 856        .connections()
 857        .filter(|connection| !connection.admin)
 858        .count();
 859
 860    METRIC_CONNECTIONS.set(connections as _);
 861
 862    let shared_projects = server.app_state.db.project_count_excluding_admins().await?;
 863    METRIC_SHARED_PROJECTS.set(shared_projects as _);
 864
 865    let encoder = prometheus::TextEncoder::new();
 866    let metric_families = prometheus::gather();
 867    let encoded_metrics = encoder
 868        .encode_to_string(&metric_families)
 869        .map_err(|err| anyhow!("{}", err))?;
 870    Ok(encoded_metrics)
 871}
 872
 873#[instrument(err, skip(executor))]
 874async fn connection_lost(
 875    session: Session,
 876    mut teardown: watch::Receiver<()>,
 877    executor: Executor,
 878) -> Result<()> {
 879    session.peer.disconnect(session.connection_id);
 880    session
 881        .connection_pool()
 882        .await
 883        .remove_connection(session.connection_id)?;
 884
 885    session
 886        .db()
 887        .await
 888        .connection_lost(session.connection_id)
 889        .await
 890        .trace_err();
 891
 892    futures::select_biased! {
 893        _ = executor.sleep(RECONNECT_TIMEOUT).fuse() => {
 894            log::info!("connection lost, removing all resources for user:{}, connection:{:?}", session.user_id, session.connection_id);
 895            leave_room_for_session(&session).await.trace_err();
 896            leave_channel_buffers_for_session(&session)
 897                .await
 898                .trace_err();
 899
 900            if !session
 901                .connection_pool()
 902                .await
 903                .is_user_online(session.user_id)
 904            {
 905                let db = session.db().await;
 906                if let Some(room) = db.decline_call(None, session.user_id).await.trace_err().flatten() {
 907                    room_updated(&room, &session.peer);
 908                }
 909            }
 910
 911            update_user_contacts(session.user_id, &session).await?;
 912        }
 913        _ = teardown.changed().fuse() => {}
 914    }
 915
 916    Ok(())
 917}
 918
 919async fn ping(_: proto::Ping, response: Response<proto::Ping>, _session: Session) -> Result<()> {
 920    response.send(proto::Ack {})?;
 921    Ok(())
 922}
 923
 924async fn create_room(
 925    _request: proto::CreateRoom,
 926    response: Response<proto::CreateRoom>,
 927    session: Session,
 928) -> Result<()> {
 929    let live_kit_room = nanoid::nanoid!(30);
 930
 931    let live_kit_connection_info = {
 932        let live_kit_room = live_kit_room.clone();
 933        let live_kit = session.live_kit_client.as_ref();
 934
 935        util::async_iife!({
 936            let live_kit = live_kit?;
 937
 938            live_kit
 939                .create_room(live_kit_room.clone())
 940                .await
 941                .trace_err()?;
 942
 943            let token = live_kit
 944                .room_token(&live_kit_room, &session.user_id.to_string())
 945                .trace_err()?;
 946
 947            Some(proto::LiveKitConnectionInfo {
 948                server_url: live_kit.url().into(),
 949                token,
 950            })
 951        })
 952    }
 953    .await;
 954
 955    let room = session
 956        .db()
 957        .await
 958        .create_room(session.user_id, session.connection_id, &live_kit_room)
 959        .await?;
 960
 961    response.send(proto::CreateRoomResponse {
 962        room: Some(room.clone()),
 963        live_kit_connection_info,
 964    })?;
 965
 966    update_user_contacts(session.user_id, &session).await?;
 967    Ok(())
 968}
 969
 970async fn join_room(
 971    request: proto::JoinRoom,
 972    response: Response<proto::JoinRoom>,
 973    session: Session,
 974) -> Result<()> {
 975    let room_id = RoomId::from_proto(request.id);
 976    let joined_room = {
 977        let room = session
 978            .db()
 979            .await
 980            .join_room(room_id, session.user_id, session.connection_id)
 981            .await?;
 982        room_updated(&room.room, &session.peer);
 983        room.into_inner()
 984    };
 985
 986    if let Some(channel_id) = joined_room.channel_id {
 987        channel_updated(
 988            channel_id,
 989            &joined_room.room,
 990            &joined_room.channel_members,
 991            &session.peer,
 992            &*session.connection_pool().await,
 993        )
 994    }
 995
 996    for connection_id in session
 997        .connection_pool()
 998        .await
 999        .user_connection_ids(session.user_id)
1000    {
1001        session
1002            .peer
1003            .send(
1004                connection_id,
1005                proto::CallCanceled {
1006                    room_id: room_id.to_proto(),
1007                },
1008            )
1009            .trace_err();
1010    }
1011
1012    let live_kit_connection_info = if let Some(live_kit) = session.live_kit_client.as_ref() {
1013        if let Some(token) = live_kit
1014            .room_token(
1015                &joined_room.room.live_kit_room,
1016                &session.user_id.to_string(),
1017            )
1018            .trace_err()
1019        {
1020            Some(proto::LiveKitConnectionInfo {
1021                server_url: live_kit.url().into(),
1022                token,
1023            })
1024        } else {
1025            None
1026        }
1027    } else {
1028        None
1029    };
1030
1031    response.send(proto::JoinRoomResponse {
1032        room: Some(joined_room.room),
1033        channel_id: joined_room.channel_id.map(|id| id.to_proto()),
1034        live_kit_connection_info,
1035    })?;
1036
1037    update_user_contacts(session.user_id, &session).await?;
1038    Ok(())
1039}
1040
1041async fn rejoin_room(
1042    request: proto::RejoinRoom,
1043    response: Response<proto::RejoinRoom>,
1044    session: Session,
1045) -> Result<()> {
1046    let room;
1047    let channel_id;
1048    let channel_members;
1049    {
1050        let mut rejoined_room = session
1051            .db()
1052            .await
1053            .rejoin_room(request, session.user_id, session.connection_id)
1054            .await?;
1055
1056        response.send(proto::RejoinRoomResponse {
1057            room: Some(rejoined_room.room.clone()),
1058            reshared_projects: rejoined_room
1059                .reshared_projects
1060                .iter()
1061                .map(|project| proto::ResharedProject {
1062                    id: project.id.to_proto(),
1063                    collaborators: project
1064                        .collaborators
1065                        .iter()
1066                        .map(|collaborator| collaborator.to_proto())
1067                        .collect(),
1068                })
1069                .collect(),
1070            rejoined_projects: rejoined_room
1071                .rejoined_projects
1072                .iter()
1073                .map(|rejoined_project| proto::RejoinedProject {
1074                    id: rejoined_project.id.to_proto(),
1075                    worktrees: rejoined_project
1076                        .worktrees
1077                        .iter()
1078                        .map(|worktree| proto::WorktreeMetadata {
1079                            id: worktree.id,
1080                            root_name: worktree.root_name.clone(),
1081                            visible: worktree.visible,
1082                            abs_path: worktree.abs_path.clone(),
1083                        })
1084                        .collect(),
1085                    collaborators: rejoined_project
1086                        .collaborators
1087                        .iter()
1088                        .map(|collaborator| collaborator.to_proto())
1089                        .collect(),
1090                    language_servers: rejoined_project.language_servers.clone(),
1091                })
1092                .collect(),
1093        })?;
1094        room_updated(&rejoined_room.room, &session.peer);
1095
1096        for project in &rejoined_room.reshared_projects {
1097            for collaborator in &project.collaborators {
1098                session
1099                    .peer
1100                    .send(
1101                        collaborator.connection_id,
1102                        proto::UpdateProjectCollaborator {
1103                            project_id: project.id.to_proto(),
1104                            old_peer_id: Some(project.old_connection_id.into()),
1105                            new_peer_id: Some(session.connection_id.into()),
1106                        },
1107                    )
1108                    .trace_err();
1109            }
1110
1111            broadcast(
1112                Some(session.connection_id),
1113                project
1114                    .collaborators
1115                    .iter()
1116                    .map(|collaborator| collaborator.connection_id),
1117                |connection_id| {
1118                    session.peer.forward_send(
1119                        session.connection_id,
1120                        connection_id,
1121                        proto::UpdateProject {
1122                            project_id: project.id.to_proto(),
1123                            worktrees: project.worktrees.clone(),
1124                        },
1125                    )
1126                },
1127            );
1128        }
1129
1130        for project in &rejoined_room.rejoined_projects {
1131            for collaborator in &project.collaborators {
1132                session
1133                    .peer
1134                    .send(
1135                        collaborator.connection_id,
1136                        proto::UpdateProjectCollaborator {
1137                            project_id: project.id.to_proto(),
1138                            old_peer_id: Some(project.old_connection_id.into()),
1139                            new_peer_id: Some(session.connection_id.into()),
1140                        },
1141                    )
1142                    .trace_err();
1143            }
1144        }
1145
1146        for project in &mut rejoined_room.rejoined_projects {
1147            for worktree in mem::take(&mut project.worktrees) {
1148                #[cfg(any(test, feature = "test-support"))]
1149                const MAX_CHUNK_SIZE: usize = 2;
1150                #[cfg(not(any(test, feature = "test-support")))]
1151                const MAX_CHUNK_SIZE: usize = 256;
1152
1153                // Stream this worktree's entries.
1154                let message = proto::UpdateWorktree {
1155                    project_id: project.id.to_proto(),
1156                    worktree_id: worktree.id,
1157                    abs_path: worktree.abs_path.clone(),
1158                    root_name: worktree.root_name,
1159                    updated_entries: worktree.updated_entries,
1160                    removed_entries: worktree.removed_entries,
1161                    scan_id: worktree.scan_id,
1162                    is_last_update: worktree.completed_scan_id == worktree.scan_id,
1163                    updated_repositories: worktree.updated_repositories,
1164                    removed_repositories: worktree.removed_repositories,
1165                };
1166                for update in proto::split_worktree_update(message, MAX_CHUNK_SIZE) {
1167                    session.peer.send(session.connection_id, update.clone())?;
1168                }
1169
1170                // Stream this worktree's diagnostics.
1171                for summary in worktree.diagnostic_summaries {
1172                    session.peer.send(
1173                        session.connection_id,
1174                        proto::UpdateDiagnosticSummary {
1175                            project_id: project.id.to_proto(),
1176                            worktree_id: worktree.id,
1177                            summary: Some(summary),
1178                        },
1179                    )?;
1180                }
1181
1182                for settings_file in worktree.settings_files {
1183                    session.peer.send(
1184                        session.connection_id,
1185                        proto::UpdateWorktreeSettings {
1186                            project_id: project.id.to_proto(),
1187                            worktree_id: worktree.id,
1188                            path: settings_file.path,
1189                            content: Some(settings_file.content),
1190                        },
1191                    )?;
1192                }
1193            }
1194
1195            for language_server in &project.language_servers {
1196                session.peer.send(
1197                    session.connection_id,
1198                    proto::UpdateLanguageServer {
1199                        project_id: project.id.to_proto(),
1200                        language_server_id: language_server.id,
1201                        variant: Some(
1202                            proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
1203                                proto::LspDiskBasedDiagnosticsUpdated {},
1204                            ),
1205                        ),
1206                    },
1207                )?;
1208            }
1209        }
1210
1211        let rejoined_room = rejoined_room.into_inner();
1212
1213        room = rejoined_room.room;
1214        channel_id = rejoined_room.channel_id;
1215        channel_members = rejoined_room.channel_members;
1216    }
1217
1218    if let Some(channel_id) = channel_id {
1219        channel_updated(
1220            channel_id,
1221            &room,
1222            &channel_members,
1223            &session.peer,
1224            &*session.connection_pool().await,
1225        );
1226    }
1227
1228    update_user_contacts(session.user_id, &session).await?;
1229    Ok(())
1230}
1231
1232async fn leave_room(
1233    _: proto::LeaveRoom,
1234    response: Response<proto::LeaveRoom>,
1235    session: Session,
1236) -> Result<()> {
1237    leave_room_for_session(&session).await?;
1238    response.send(proto::Ack {})?;
1239    Ok(())
1240}
1241
1242async fn call(
1243    request: proto::Call,
1244    response: Response<proto::Call>,
1245    session: Session,
1246) -> Result<()> {
1247    let room_id = RoomId::from_proto(request.room_id);
1248    let calling_user_id = session.user_id;
1249    let calling_connection_id = session.connection_id;
1250    let called_user_id = UserId::from_proto(request.called_user_id);
1251    let initial_project_id = request.initial_project_id.map(ProjectId::from_proto);
1252    if !session
1253        .db()
1254        .await
1255        .has_contact(calling_user_id, called_user_id)
1256        .await?
1257    {
1258        return Err(anyhow!("cannot call a user who isn't a contact"))?;
1259    }
1260
1261    let incoming_call = {
1262        let (room, incoming_call) = &mut *session
1263            .db()
1264            .await
1265            .call(
1266                room_id,
1267                calling_user_id,
1268                calling_connection_id,
1269                called_user_id,
1270                initial_project_id,
1271            )
1272            .await?;
1273        room_updated(&room, &session.peer);
1274        mem::take(incoming_call)
1275    };
1276    update_user_contacts(called_user_id, &session).await?;
1277
1278    let mut calls = session
1279        .connection_pool()
1280        .await
1281        .user_connection_ids(called_user_id)
1282        .map(|connection_id| session.peer.request(connection_id, incoming_call.clone()))
1283        .collect::<FuturesUnordered<_>>();
1284
1285    while let Some(call_response) = calls.next().await {
1286        match call_response.as_ref() {
1287            Ok(_) => {
1288                response.send(proto::Ack {})?;
1289                return Ok(());
1290            }
1291            Err(_) => {
1292                call_response.trace_err();
1293            }
1294        }
1295    }
1296
1297    {
1298        let room = session
1299            .db()
1300            .await
1301            .call_failed(room_id, called_user_id)
1302            .await?;
1303        room_updated(&room, &session.peer);
1304    }
1305    update_user_contacts(called_user_id, &session).await?;
1306
1307    Err(anyhow!("failed to ring user"))?
1308}
1309
1310async fn cancel_call(
1311    request: proto::CancelCall,
1312    response: Response<proto::CancelCall>,
1313    session: Session,
1314) -> Result<()> {
1315    let called_user_id = UserId::from_proto(request.called_user_id);
1316    let room_id = RoomId::from_proto(request.room_id);
1317    {
1318        let room = session
1319            .db()
1320            .await
1321            .cancel_call(room_id, session.connection_id, called_user_id)
1322            .await?;
1323        room_updated(&room, &session.peer);
1324    }
1325
1326    for connection_id in session
1327        .connection_pool()
1328        .await
1329        .user_connection_ids(called_user_id)
1330    {
1331        session
1332            .peer
1333            .send(
1334                connection_id,
1335                proto::CallCanceled {
1336                    room_id: room_id.to_proto(),
1337                },
1338            )
1339            .trace_err();
1340    }
1341    response.send(proto::Ack {})?;
1342
1343    update_user_contacts(called_user_id, &session).await?;
1344    Ok(())
1345}
1346
1347async fn decline_call(message: proto::DeclineCall, session: Session) -> Result<()> {
1348    let room_id = RoomId::from_proto(message.room_id);
1349    {
1350        let room = session
1351            .db()
1352            .await
1353            .decline_call(Some(room_id), session.user_id)
1354            .await?
1355            .ok_or_else(|| anyhow!("failed to decline call"))?;
1356        room_updated(&room, &session.peer);
1357    }
1358
1359    for connection_id in session
1360        .connection_pool()
1361        .await
1362        .user_connection_ids(session.user_id)
1363    {
1364        session
1365            .peer
1366            .send(
1367                connection_id,
1368                proto::CallCanceled {
1369                    room_id: room_id.to_proto(),
1370                },
1371            )
1372            .trace_err();
1373    }
1374    update_user_contacts(session.user_id, &session).await?;
1375    Ok(())
1376}
1377
1378async fn update_participant_location(
1379    request: proto::UpdateParticipantLocation,
1380    response: Response<proto::UpdateParticipantLocation>,
1381    session: Session,
1382) -> Result<()> {
1383    let room_id = RoomId::from_proto(request.room_id);
1384    let location = request
1385        .location
1386        .ok_or_else(|| anyhow!("invalid location"))?;
1387
1388    let db = session.db().await;
1389    let room = db
1390        .update_room_participant_location(room_id, session.connection_id, location)
1391        .await?;
1392
1393    room_updated(&room, &session.peer);
1394    response.send(proto::Ack {})?;
1395    Ok(())
1396}
1397
1398async fn share_project(
1399    request: proto::ShareProject,
1400    response: Response<proto::ShareProject>,
1401    session: Session,
1402) -> Result<()> {
1403    let (project_id, room) = &*session
1404        .db()
1405        .await
1406        .share_project(
1407            RoomId::from_proto(request.room_id),
1408            session.connection_id,
1409            &request.worktrees,
1410        )
1411        .await?;
1412    response.send(proto::ShareProjectResponse {
1413        project_id: project_id.to_proto(),
1414    })?;
1415    room_updated(&room, &session.peer);
1416
1417    Ok(())
1418}
1419
1420async fn unshare_project(message: proto::UnshareProject, session: Session) -> Result<()> {
1421    let project_id = ProjectId::from_proto(message.project_id);
1422
1423    let (room, guest_connection_ids) = &*session
1424        .db()
1425        .await
1426        .unshare_project(project_id, session.connection_id)
1427        .await?;
1428
1429    broadcast(
1430        Some(session.connection_id),
1431        guest_connection_ids.iter().copied(),
1432        |conn_id| session.peer.send(conn_id, message.clone()),
1433    );
1434    room_updated(&room, &session.peer);
1435
1436    Ok(())
1437}
1438
1439async fn join_project(
1440    request: proto::JoinProject,
1441    response: Response<proto::JoinProject>,
1442    session: Session,
1443) -> Result<()> {
1444    let project_id = ProjectId::from_proto(request.project_id);
1445    let guest_user_id = session.user_id;
1446
1447    tracing::info!(%project_id, "join project");
1448
1449    let (project, replica_id) = &mut *session
1450        .db()
1451        .await
1452        .join_project(project_id, session.connection_id)
1453        .await?;
1454
1455    let collaborators = project
1456        .collaborators
1457        .iter()
1458        .filter(|collaborator| collaborator.connection_id != session.connection_id)
1459        .map(|collaborator| collaborator.to_proto())
1460        .collect::<Vec<_>>();
1461
1462    let worktrees = project
1463        .worktrees
1464        .iter()
1465        .map(|(id, worktree)| proto::WorktreeMetadata {
1466            id: *id,
1467            root_name: worktree.root_name.clone(),
1468            visible: worktree.visible,
1469            abs_path: worktree.abs_path.clone(),
1470        })
1471        .collect::<Vec<_>>();
1472
1473    for collaborator in &collaborators {
1474        session
1475            .peer
1476            .send(
1477                collaborator.peer_id.unwrap().into(),
1478                proto::AddProjectCollaborator {
1479                    project_id: project_id.to_proto(),
1480                    collaborator: Some(proto::Collaborator {
1481                        peer_id: Some(session.connection_id.into()),
1482                        replica_id: replica_id.0 as u32,
1483                        user_id: guest_user_id.to_proto(),
1484                    }),
1485                },
1486            )
1487            .trace_err();
1488    }
1489
1490    // First, we send the metadata associated with each worktree.
1491    response.send(proto::JoinProjectResponse {
1492        worktrees: worktrees.clone(),
1493        replica_id: replica_id.0 as u32,
1494        collaborators: collaborators.clone(),
1495        language_servers: project.language_servers.clone(),
1496    })?;
1497
1498    for (worktree_id, worktree) in mem::take(&mut project.worktrees) {
1499        #[cfg(any(test, feature = "test-support"))]
1500        const MAX_CHUNK_SIZE: usize = 2;
1501        #[cfg(not(any(test, feature = "test-support")))]
1502        const MAX_CHUNK_SIZE: usize = 256;
1503
1504        // Stream this worktree's entries.
1505        let message = proto::UpdateWorktree {
1506            project_id: project_id.to_proto(),
1507            worktree_id,
1508            abs_path: worktree.abs_path.clone(),
1509            root_name: worktree.root_name,
1510            updated_entries: worktree.entries,
1511            removed_entries: Default::default(),
1512            scan_id: worktree.scan_id,
1513            is_last_update: worktree.scan_id == worktree.completed_scan_id,
1514            updated_repositories: worktree.repository_entries.into_values().collect(),
1515            removed_repositories: Default::default(),
1516        };
1517        for update in proto::split_worktree_update(message, MAX_CHUNK_SIZE) {
1518            session.peer.send(session.connection_id, update.clone())?;
1519        }
1520
1521        // Stream this worktree's diagnostics.
1522        for summary in worktree.diagnostic_summaries {
1523            session.peer.send(
1524                session.connection_id,
1525                proto::UpdateDiagnosticSummary {
1526                    project_id: project_id.to_proto(),
1527                    worktree_id: worktree.id,
1528                    summary: Some(summary),
1529                },
1530            )?;
1531        }
1532
1533        for settings_file in worktree.settings_files {
1534            session.peer.send(
1535                session.connection_id,
1536                proto::UpdateWorktreeSettings {
1537                    project_id: project_id.to_proto(),
1538                    worktree_id: worktree.id,
1539                    path: settings_file.path,
1540                    content: Some(settings_file.content),
1541                },
1542            )?;
1543        }
1544    }
1545
1546    for language_server in &project.language_servers {
1547        session.peer.send(
1548            session.connection_id,
1549            proto::UpdateLanguageServer {
1550                project_id: project_id.to_proto(),
1551                language_server_id: language_server.id,
1552                variant: Some(
1553                    proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
1554                        proto::LspDiskBasedDiagnosticsUpdated {},
1555                    ),
1556                ),
1557            },
1558        )?;
1559    }
1560
1561    Ok(())
1562}
1563
1564async fn leave_project(request: proto::LeaveProject, session: Session) -> Result<()> {
1565    let sender_id = session.connection_id;
1566    let project_id = ProjectId::from_proto(request.project_id);
1567
1568    let (room, project) = &*session
1569        .db()
1570        .await
1571        .leave_project(project_id, sender_id)
1572        .await?;
1573    tracing::info!(
1574        %project_id,
1575        host_user_id = %project.host_user_id,
1576        host_connection_id = %project.host_connection_id,
1577        "leave project"
1578    );
1579
1580    project_left(&project, &session);
1581    room_updated(&room, &session.peer);
1582
1583    Ok(())
1584}
1585
1586async fn update_project(
1587    request: proto::UpdateProject,
1588    response: Response<proto::UpdateProject>,
1589    session: Session,
1590) -> Result<()> {
1591    let project_id = ProjectId::from_proto(request.project_id);
1592    let (room, guest_connection_ids) = &*session
1593        .db()
1594        .await
1595        .update_project(project_id, session.connection_id, &request.worktrees)
1596        .await?;
1597    broadcast(
1598        Some(session.connection_id),
1599        guest_connection_ids.iter().copied(),
1600        |connection_id| {
1601            session
1602                .peer
1603                .forward_send(session.connection_id, connection_id, request.clone())
1604        },
1605    );
1606    room_updated(&room, &session.peer);
1607    response.send(proto::Ack {})?;
1608
1609    Ok(())
1610}
1611
1612async fn update_worktree(
1613    request: proto::UpdateWorktree,
1614    response: Response<proto::UpdateWorktree>,
1615    session: Session,
1616) -> Result<()> {
1617    let guest_connection_ids = session
1618        .db()
1619        .await
1620        .update_worktree(&request, session.connection_id)
1621        .await?;
1622
1623    broadcast(
1624        Some(session.connection_id),
1625        guest_connection_ids.iter().copied(),
1626        |connection_id| {
1627            session
1628                .peer
1629                .forward_send(session.connection_id, connection_id, request.clone())
1630        },
1631    );
1632    response.send(proto::Ack {})?;
1633    Ok(())
1634}
1635
1636async fn update_diagnostic_summary(
1637    message: proto::UpdateDiagnosticSummary,
1638    session: Session,
1639) -> Result<()> {
1640    let guest_connection_ids = session
1641        .db()
1642        .await
1643        .update_diagnostic_summary(&message, session.connection_id)
1644        .await?;
1645
1646    broadcast(
1647        Some(session.connection_id),
1648        guest_connection_ids.iter().copied(),
1649        |connection_id| {
1650            session
1651                .peer
1652                .forward_send(session.connection_id, connection_id, message.clone())
1653        },
1654    );
1655
1656    Ok(())
1657}
1658
1659async fn update_worktree_settings(
1660    message: proto::UpdateWorktreeSettings,
1661    session: Session,
1662) -> Result<()> {
1663    let guest_connection_ids = session
1664        .db()
1665        .await
1666        .update_worktree_settings(&message, session.connection_id)
1667        .await?;
1668
1669    broadcast(
1670        Some(session.connection_id),
1671        guest_connection_ids.iter().copied(),
1672        |connection_id| {
1673            session
1674                .peer
1675                .forward_send(session.connection_id, connection_id, message.clone())
1676        },
1677    );
1678
1679    Ok(())
1680}
1681
1682async fn refresh_inlay_hints(request: proto::RefreshInlayHints, session: Session) -> Result<()> {
1683    broadcast_project_message(request.project_id, request, session).await
1684}
1685
1686async fn start_language_server(
1687    request: proto::StartLanguageServer,
1688    session: Session,
1689) -> Result<()> {
1690    let guest_connection_ids = session
1691        .db()
1692        .await
1693        .start_language_server(&request, session.connection_id)
1694        .await?;
1695
1696    broadcast(
1697        Some(session.connection_id),
1698        guest_connection_ids.iter().copied(),
1699        |connection_id| {
1700            session
1701                .peer
1702                .forward_send(session.connection_id, connection_id, request.clone())
1703        },
1704    );
1705    Ok(())
1706}
1707
1708async fn update_language_server(
1709    request: proto::UpdateLanguageServer,
1710    session: Session,
1711) -> Result<()> {
1712    session.executor.record_backtrace();
1713    let project_id = ProjectId::from_proto(request.project_id);
1714    let project_connection_ids = session
1715        .db()
1716        .await
1717        .project_connection_ids(project_id, session.connection_id)
1718        .await?;
1719    broadcast(
1720        Some(session.connection_id),
1721        project_connection_ids.iter().copied(),
1722        |connection_id| {
1723            session
1724                .peer
1725                .forward_send(session.connection_id, connection_id, request.clone())
1726        },
1727    );
1728    Ok(())
1729}
1730
1731async fn forward_project_request<T>(
1732    request: T,
1733    response: Response<T>,
1734    session: Session,
1735) -> Result<()>
1736where
1737    T: EntityMessage + RequestMessage,
1738{
1739    session.executor.record_backtrace();
1740    let project_id = ProjectId::from_proto(request.remote_entity_id());
1741    let host_connection_id = {
1742        let collaborators = session
1743            .db()
1744            .await
1745            .project_collaborators(project_id, session.connection_id)
1746            .await?;
1747        collaborators
1748            .iter()
1749            .find(|collaborator| collaborator.is_host)
1750            .ok_or_else(|| anyhow!("host not found"))?
1751            .connection_id
1752    };
1753
1754    let payload = session
1755        .peer
1756        .forward_request(session.connection_id, host_connection_id, request)
1757        .await?;
1758
1759    response.send(payload)?;
1760    Ok(())
1761}
1762
1763async fn create_buffer_for_peer(
1764    request: proto::CreateBufferForPeer,
1765    session: Session,
1766) -> Result<()> {
1767    session.executor.record_backtrace();
1768    let peer_id = request.peer_id.ok_or_else(|| anyhow!("invalid peer id"))?;
1769    session
1770        .peer
1771        .forward_send(session.connection_id, peer_id.into(), request)?;
1772    Ok(())
1773}
1774
1775async fn update_buffer(
1776    request: proto::UpdateBuffer,
1777    response: Response<proto::UpdateBuffer>,
1778    session: Session,
1779) -> Result<()> {
1780    session.executor.record_backtrace();
1781    let project_id = ProjectId::from_proto(request.project_id);
1782    let mut guest_connection_ids;
1783    let mut host_connection_id = None;
1784    {
1785        let collaborators = session
1786            .db()
1787            .await
1788            .project_collaborators(project_id, session.connection_id)
1789            .await?;
1790        guest_connection_ids = Vec::with_capacity(collaborators.len() - 1);
1791        for collaborator in collaborators.iter() {
1792            if collaborator.is_host {
1793                host_connection_id = Some(collaborator.connection_id);
1794            } else {
1795                guest_connection_ids.push(collaborator.connection_id);
1796            }
1797        }
1798    }
1799    let host_connection_id = host_connection_id.ok_or_else(|| anyhow!("host not found"))?;
1800
1801    session.executor.record_backtrace();
1802    broadcast(
1803        Some(session.connection_id),
1804        guest_connection_ids,
1805        |connection_id| {
1806            session
1807                .peer
1808                .forward_send(session.connection_id, connection_id, request.clone())
1809        },
1810    );
1811    if host_connection_id != session.connection_id {
1812        session
1813            .peer
1814            .forward_request(session.connection_id, host_connection_id, request.clone())
1815            .await?;
1816    }
1817
1818    response.send(proto::Ack {})?;
1819    Ok(())
1820}
1821
1822async fn update_buffer_file(request: proto::UpdateBufferFile, session: Session) -> Result<()> {
1823    let project_id = ProjectId::from_proto(request.project_id);
1824    let project_connection_ids = session
1825        .db()
1826        .await
1827        .project_connection_ids(project_id, session.connection_id)
1828        .await?;
1829
1830    broadcast(
1831        Some(session.connection_id),
1832        project_connection_ids.iter().copied(),
1833        |connection_id| {
1834            session
1835                .peer
1836                .forward_send(session.connection_id, connection_id, request.clone())
1837        },
1838    );
1839    Ok(())
1840}
1841
1842async fn buffer_reloaded(request: proto::BufferReloaded, session: Session) -> Result<()> {
1843    let project_id = ProjectId::from_proto(request.project_id);
1844    let project_connection_ids = session
1845        .db()
1846        .await
1847        .project_connection_ids(project_id, session.connection_id)
1848        .await?;
1849    broadcast(
1850        Some(session.connection_id),
1851        project_connection_ids.iter().copied(),
1852        |connection_id| {
1853            session
1854                .peer
1855                .forward_send(session.connection_id, connection_id, request.clone())
1856        },
1857    );
1858    Ok(())
1859}
1860
1861async fn buffer_saved(request: proto::BufferSaved, session: Session) -> Result<()> {
1862    broadcast_project_message(request.project_id, request, session).await
1863}
1864
1865async fn broadcast_project_message<T: EnvelopedMessage>(
1866    project_id: u64,
1867    request: T,
1868    session: Session,
1869) -> Result<()> {
1870    let project_id = ProjectId::from_proto(project_id);
1871    let project_connection_ids = session
1872        .db()
1873        .await
1874        .project_connection_ids(project_id, session.connection_id)
1875        .await?;
1876    broadcast(
1877        Some(session.connection_id),
1878        project_connection_ids.iter().copied(),
1879        |connection_id| {
1880            session
1881                .peer
1882                .forward_send(session.connection_id, connection_id, request.clone())
1883        },
1884    );
1885    Ok(())
1886}
1887
1888async fn follow(
1889    request: proto::Follow,
1890    response: Response<proto::Follow>,
1891    session: Session,
1892) -> Result<()> {
1893    let room_id = RoomId::from_proto(request.room_id);
1894    let project_id = request.project_id.map(ProjectId::from_proto);
1895    let leader_id = request
1896        .leader_id
1897        .ok_or_else(|| anyhow!("invalid leader id"))?
1898        .into();
1899    let follower_id = session.connection_id;
1900
1901    session
1902        .db()
1903        .await
1904        .check_can_follow(room_id, project_id, leader_id, session.connection_id)
1905        .await?;
1906
1907    let mut response_payload = session
1908        .peer
1909        .forward_request(session.connection_id, leader_id, request)
1910        .await?;
1911    response_payload
1912        .views
1913        .retain(|view| view.leader_id != Some(follower_id.into()));
1914    response.send(response_payload)?;
1915
1916    let room = session
1917        .db()
1918        .await
1919        .follow(room_id, project_id, leader_id, follower_id)
1920        .await?;
1921    room_updated(&room, &session.peer);
1922
1923    Ok(())
1924}
1925
1926async fn unfollow(request: proto::Unfollow, session: Session) -> Result<()> {
1927    let room_id = RoomId::from_proto(request.room_id);
1928    let project_id = request.project_id.map(ProjectId::from_proto);
1929    let leader_id = request
1930        .leader_id
1931        .ok_or_else(|| anyhow!("invalid leader id"))?
1932        .into();
1933    let follower_id = session.connection_id;
1934
1935    session
1936        .db()
1937        .await
1938        .check_can_unfollow(room_id, project_id, leader_id, session.connection_id)
1939        .await?;
1940
1941    session
1942        .peer
1943        .forward_send(session.connection_id, leader_id, request)?;
1944
1945    let room = session
1946        .db()
1947        .await
1948        .unfollow(room_id, project_id, leader_id, follower_id)
1949        .await?;
1950    room_updated(&room, &session.peer);
1951
1952    Ok(())
1953}
1954
1955async fn update_followers(request: proto::UpdateFollowers, session: Session) -> Result<()> {
1956    let room_id = RoomId::from_proto(request.room_id);
1957    let database = session.db.lock().await;
1958
1959    let connection_ids = if let Some(project_id) = request.project_id {
1960        let project_id = ProjectId::from_proto(project_id);
1961        database
1962            .project_connection_ids(project_id, session.connection_id)
1963            .await?
1964    } else {
1965        database
1966            .room_connection_ids(room_id, session.connection_id)
1967            .await?
1968    };
1969
1970    let leader_id = request.variant.as_ref().and_then(|variant| match variant {
1971        proto::update_followers::Variant::CreateView(payload) => payload.leader_id,
1972        proto::update_followers::Variant::UpdateView(payload) => payload.leader_id,
1973        proto::update_followers::Variant::UpdateActiveView(payload) => payload.leader_id,
1974    });
1975    for follower_peer_id in request.follower_ids.iter().copied() {
1976        let follower_connection_id = follower_peer_id.into();
1977        if Some(follower_peer_id) != leader_id && connection_ids.contains(&follower_connection_id) {
1978            session.peer.forward_send(
1979                session.connection_id,
1980                follower_connection_id,
1981                request.clone(),
1982            )?;
1983        }
1984    }
1985    Ok(())
1986}
1987
1988async fn get_users(
1989    request: proto::GetUsers,
1990    response: Response<proto::GetUsers>,
1991    session: Session,
1992) -> Result<()> {
1993    let user_ids = request
1994        .user_ids
1995        .into_iter()
1996        .map(UserId::from_proto)
1997        .collect();
1998    let users = session
1999        .db()
2000        .await
2001        .get_users_by_ids(user_ids)
2002        .await?
2003        .into_iter()
2004        .map(|user| proto::User {
2005            id: user.id.to_proto(),
2006            avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
2007            github_login: user.github_login,
2008        })
2009        .collect();
2010    response.send(proto::UsersResponse { users })?;
2011    Ok(())
2012}
2013
2014async fn fuzzy_search_users(
2015    request: proto::FuzzySearchUsers,
2016    response: Response<proto::FuzzySearchUsers>,
2017    session: Session,
2018) -> Result<()> {
2019    let query = request.query;
2020    let users = match query.len() {
2021        0 => vec![],
2022        1 | 2 => session
2023            .db()
2024            .await
2025            .get_user_by_github_login(&query)
2026            .await?
2027            .into_iter()
2028            .collect(),
2029        _ => session.db().await.fuzzy_search_users(&query, 10).await?,
2030    };
2031    let users = users
2032        .into_iter()
2033        .filter(|user| user.id != session.user_id)
2034        .map(|user| proto::User {
2035            id: user.id.to_proto(),
2036            avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
2037            github_login: user.github_login,
2038        })
2039        .collect();
2040    response.send(proto::UsersResponse { users })?;
2041    Ok(())
2042}
2043
2044async fn request_contact(
2045    request: proto::RequestContact,
2046    response: Response<proto::RequestContact>,
2047    session: Session,
2048) -> Result<()> {
2049    let requester_id = session.user_id;
2050    let responder_id = UserId::from_proto(request.responder_id);
2051    if requester_id == responder_id {
2052        return Err(anyhow!("cannot add yourself as a contact"))?;
2053    }
2054
2055    session
2056        .db()
2057        .await
2058        .send_contact_request(requester_id, responder_id)
2059        .await?;
2060
2061    // Update outgoing contact requests of requester
2062    let mut update = proto::UpdateContacts::default();
2063    update.outgoing_requests.push(responder_id.to_proto());
2064    for connection_id in session
2065        .connection_pool()
2066        .await
2067        .user_connection_ids(requester_id)
2068    {
2069        session.peer.send(connection_id, update.clone())?;
2070    }
2071
2072    // Update incoming contact requests of responder
2073    let mut update = proto::UpdateContacts::default();
2074    update
2075        .incoming_requests
2076        .push(proto::IncomingContactRequest {
2077            requester_id: requester_id.to_proto(),
2078            should_notify: true,
2079        });
2080    for connection_id in session
2081        .connection_pool()
2082        .await
2083        .user_connection_ids(responder_id)
2084    {
2085        session.peer.send(connection_id, update.clone())?;
2086    }
2087
2088    response.send(proto::Ack {})?;
2089    Ok(())
2090}
2091
2092async fn respond_to_contact_request(
2093    request: proto::RespondToContactRequest,
2094    response: Response<proto::RespondToContactRequest>,
2095    session: Session,
2096) -> Result<()> {
2097    let responder_id = session.user_id;
2098    let requester_id = UserId::from_proto(request.requester_id);
2099    let db = session.db().await;
2100    if request.response == proto::ContactRequestResponse::Dismiss as i32 {
2101        db.dismiss_contact_notification(responder_id, requester_id)
2102            .await?;
2103    } else {
2104        let accept = request.response == proto::ContactRequestResponse::Accept as i32;
2105
2106        db.respond_to_contact_request(responder_id, requester_id, accept)
2107            .await?;
2108        let requester_busy = db.is_user_busy(requester_id).await?;
2109        let responder_busy = db.is_user_busy(responder_id).await?;
2110
2111        let pool = session.connection_pool().await;
2112        // Update responder with new contact
2113        let mut update = proto::UpdateContacts::default();
2114        if accept {
2115            update
2116                .contacts
2117                .push(contact_for_user(requester_id, false, requester_busy, &pool));
2118        }
2119        update
2120            .remove_incoming_requests
2121            .push(requester_id.to_proto());
2122        for connection_id in pool.user_connection_ids(responder_id) {
2123            session.peer.send(connection_id, update.clone())?;
2124        }
2125
2126        // Update requester with new contact
2127        let mut update = proto::UpdateContacts::default();
2128        if accept {
2129            update
2130                .contacts
2131                .push(contact_for_user(responder_id, true, responder_busy, &pool));
2132        }
2133        update
2134            .remove_outgoing_requests
2135            .push(responder_id.to_proto());
2136        for connection_id in pool.user_connection_ids(requester_id) {
2137            session.peer.send(connection_id, update.clone())?;
2138        }
2139    }
2140
2141    response.send(proto::Ack {})?;
2142    Ok(())
2143}
2144
2145async fn remove_contact(
2146    request: proto::RemoveContact,
2147    response: Response<proto::RemoveContact>,
2148    session: Session,
2149) -> Result<()> {
2150    let requester_id = session.user_id;
2151    let responder_id = UserId::from_proto(request.user_id);
2152    let db = session.db().await;
2153    let contact_accepted = db.remove_contact(requester_id, responder_id).await?;
2154
2155    let pool = session.connection_pool().await;
2156    // Update outgoing contact requests of requester
2157    let mut update = proto::UpdateContacts::default();
2158    if contact_accepted {
2159        update.remove_contacts.push(responder_id.to_proto());
2160    } else {
2161        update
2162            .remove_outgoing_requests
2163            .push(responder_id.to_proto());
2164    }
2165    for connection_id in pool.user_connection_ids(requester_id) {
2166        session.peer.send(connection_id, update.clone())?;
2167    }
2168
2169    // Update incoming contact requests of responder
2170    let mut update = proto::UpdateContacts::default();
2171    if contact_accepted {
2172        update.remove_contacts.push(requester_id.to_proto());
2173    } else {
2174        update
2175            .remove_incoming_requests
2176            .push(requester_id.to_proto());
2177    }
2178    for connection_id in pool.user_connection_ids(responder_id) {
2179        session.peer.send(connection_id, update.clone())?;
2180    }
2181
2182    response.send(proto::Ack {})?;
2183    Ok(())
2184}
2185
2186async fn create_channel(
2187    request: proto::CreateChannel,
2188    response: Response<proto::CreateChannel>,
2189    session: Session,
2190) -> Result<()> {
2191    let db = session.db().await;
2192    let live_kit_room = format!("channel-{}", nanoid::nanoid!(30));
2193
2194    if let Some(live_kit) = session.live_kit_client.as_ref() {
2195        live_kit.create_room(live_kit_room.clone()).await?;
2196    }
2197
2198    let parent_id = request.parent_id.map(|id| ChannelId::from_proto(id));
2199    let id = db
2200        .create_channel(&request.name, parent_id, &live_kit_room, session.user_id)
2201        .await?;
2202
2203    let channel = proto::Channel {
2204        id: id.to_proto(),
2205        name: request.name,
2206    };
2207
2208    response.send(proto::CreateChannelResponse {
2209        channel: Some(channel.clone()),
2210        parent_id: request.parent_id,
2211    })?;
2212
2213    let Some(parent_id) = parent_id else {
2214        return Ok(());
2215    };
2216
2217    let update = proto::UpdateChannels {
2218        channels: vec![channel],
2219        insert_edge: vec![ChannelEdge {
2220            parent_id: parent_id.to_proto(),
2221            channel_id: id.to_proto(),
2222        }],
2223        ..Default::default()
2224    };
2225
2226    let user_ids_to_notify = db.get_channel_members(parent_id).await?;
2227
2228    let connection_pool = session.connection_pool().await;
2229    for user_id in user_ids_to_notify {
2230        for connection_id in connection_pool.user_connection_ids(user_id) {
2231            if user_id == session.user_id {
2232                continue;
2233            }
2234            session.peer.send(connection_id, update.clone())?;
2235        }
2236    }
2237
2238    Ok(())
2239}
2240
2241async fn delete_channel(
2242    request: proto::DeleteChannel,
2243    response: Response<proto::DeleteChannel>,
2244    session: Session,
2245) -> Result<()> {
2246    let db = session.db().await;
2247
2248    let channel_id = request.channel_id;
2249    let (removed_channels, member_ids) = db
2250        .delete_channel(ChannelId::from_proto(channel_id), session.user_id)
2251        .await?;
2252    response.send(proto::Ack {})?;
2253
2254    // Notify members of removed channels
2255    let mut update = proto::UpdateChannels::default();
2256    update
2257        .delete_channels
2258        .extend(removed_channels.into_iter().map(|id| id.to_proto()));
2259
2260    let connection_pool = session.connection_pool().await;
2261    for member_id in member_ids {
2262        for connection_id in connection_pool.user_connection_ids(member_id) {
2263            session.peer.send(connection_id, update.clone())?;
2264        }
2265    }
2266
2267    Ok(())
2268}
2269
2270async fn invite_channel_member(
2271    request: proto::InviteChannelMember,
2272    response: Response<proto::InviteChannelMember>,
2273    session: Session,
2274) -> Result<()> {
2275    let db = session.db().await;
2276    let channel_id = ChannelId::from_proto(request.channel_id);
2277    let invitee_id = UserId::from_proto(request.user_id);
2278    db.invite_channel_member(channel_id, invitee_id, session.user_id, request.admin)
2279        .await?;
2280
2281    let (channel, _) = db
2282        .get_channel(channel_id, session.user_id)
2283        .await?
2284        .ok_or_else(|| anyhow!("channel not found"))?;
2285
2286    let mut update = proto::UpdateChannels::default();
2287    update.channel_invitations.push(proto::Channel {
2288        id: channel.id.to_proto(),
2289        name: channel.name,
2290    });
2291    for connection_id in session
2292        .connection_pool()
2293        .await
2294        .user_connection_ids(invitee_id)
2295    {
2296        session.peer.send(connection_id, update.clone())?;
2297    }
2298
2299    response.send(proto::Ack {})?;
2300    Ok(())
2301}
2302
2303async fn remove_channel_member(
2304    request: proto::RemoveChannelMember,
2305    response: Response<proto::RemoveChannelMember>,
2306    session: Session,
2307) -> Result<()> {
2308    let db = session.db().await;
2309    let channel_id = ChannelId::from_proto(request.channel_id);
2310    let member_id = UserId::from_proto(request.user_id);
2311
2312    db.remove_channel_member(channel_id, member_id, session.user_id)
2313        .await?;
2314
2315    let mut update = proto::UpdateChannels::default();
2316    update.delete_channels.push(channel_id.to_proto());
2317
2318    for connection_id in session
2319        .connection_pool()
2320        .await
2321        .user_connection_ids(member_id)
2322    {
2323        session.peer.send(connection_id, update.clone())?;
2324    }
2325
2326    response.send(proto::Ack {})?;
2327    Ok(())
2328}
2329
2330async fn set_channel_member_admin(
2331    request: proto::SetChannelMemberAdmin,
2332    response: Response<proto::SetChannelMemberAdmin>,
2333    session: Session,
2334) -> Result<()> {
2335    let db = session.db().await;
2336    let channel_id = ChannelId::from_proto(request.channel_id);
2337    let member_id = UserId::from_proto(request.user_id);
2338    db.set_channel_member_admin(channel_id, session.user_id, member_id, request.admin)
2339        .await?;
2340
2341    let (channel, has_accepted) = db
2342        .get_channel(channel_id, member_id)
2343        .await?
2344        .ok_or_else(|| anyhow!("channel not found"))?;
2345
2346    let mut update = proto::UpdateChannels::default();
2347    if has_accepted {
2348        update.channel_permissions.push(proto::ChannelPermission {
2349            channel_id: channel.id.to_proto(),
2350            is_admin: request.admin,
2351        });
2352    }
2353
2354    for connection_id in session
2355        .connection_pool()
2356        .await
2357        .user_connection_ids(member_id)
2358    {
2359        session.peer.send(connection_id, update.clone())?;
2360    }
2361
2362    response.send(proto::Ack {})?;
2363    Ok(())
2364}
2365
2366async fn rename_channel(
2367    request: proto::RenameChannel,
2368    response: Response<proto::RenameChannel>,
2369    session: Session,
2370) -> Result<()> {
2371    let db = session.db().await;
2372    let channel_id = ChannelId::from_proto(request.channel_id);
2373    let new_name = db
2374        .rename_channel(channel_id, session.user_id, &request.name)
2375        .await?;
2376
2377    let channel = proto::Channel {
2378        id: request.channel_id,
2379        name: new_name,
2380    };
2381    response.send(proto::RenameChannelResponse {
2382        channel: Some(channel.clone()),
2383    })?;
2384    let mut update = proto::UpdateChannels::default();
2385    update.channels.push(channel);
2386
2387    let member_ids = db.get_channel_members(channel_id).await?;
2388
2389    let connection_pool = session.connection_pool().await;
2390    for member_id in member_ids {
2391        for connection_id in connection_pool.user_connection_ids(member_id) {
2392            session.peer.send(connection_id, update.clone())?;
2393        }
2394    }
2395
2396    Ok(())
2397}
2398
2399async fn link_channel(
2400    request: proto::LinkChannel,
2401    response: Response<proto::LinkChannel>,
2402    session: Session,
2403) -> Result<()> {
2404    let db = session.db().await;
2405    let channel_id = ChannelId::from_proto(request.channel_id);
2406    let to = ChannelId::from_proto(request.to);
2407    let channels_to_send = db.link_channel(session.user_id, channel_id, to).await?;
2408
2409    let members = db.get_channel_members(to).await?;
2410    let connection_pool = session.connection_pool().await;
2411    let update = proto::UpdateChannels {
2412        channels: channels_to_send
2413            .channels
2414            .into_iter()
2415            .map(|channel| proto::Channel {
2416                id: channel.id.to_proto(),
2417                name: channel.name,
2418            })
2419            .collect(),
2420        insert_edge: channels_to_send.edges,
2421        ..Default::default()
2422    };
2423    for member_id in members {
2424        for connection_id in connection_pool.user_connection_ids(member_id) {
2425            session.peer.send(connection_id, update.clone())?;
2426        }
2427    }
2428
2429    response.send(Ack {})?;
2430
2431    Ok(())
2432}
2433
2434async fn unlink_channel(
2435    request: proto::UnlinkChannel,
2436    response: Response<proto::UnlinkChannel>,
2437    session: Session,
2438) -> Result<()> {
2439    let db = session.db().await;
2440    let channel_id = ChannelId::from_proto(request.channel_id);
2441    let from = ChannelId::from_proto(request.from);
2442
2443    db.unlink_channel(session.user_id, channel_id, from).await?;
2444
2445    let members = db.get_channel_members(from).await?;
2446
2447    let update = proto::UpdateChannels {
2448        delete_edge: vec![proto::ChannelEdge {
2449            channel_id: channel_id.to_proto(),
2450            parent_id: from.to_proto(),
2451        }],
2452        ..Default::default()
2453    };
2454    let connection_pool = session.connection_pool().await;
2455    for member_id in members {
2456        for connection_id in connection_pool.user_connection_ids(member_id) {
2457            session.peer.send(connection_id, update.clone())?;
2458        }
2459    }
2460
2461    response.send(Ack {})?;
2462
2463    Ok(())
2464}
2465
2466async fn move_channel(
2467    request: proto::MoveChannel,
2468    response: Response<proto::MoveChannel>,
2469    session: Session,
2470) -> Result<()> {
2471    let db = session.db().await;
2472    let channel_id = ChannelId::from_proto(request.channel_id);
2473    let from_parent = ChannelId::from_proto(request.from);
2474    let to = ChannelId::from_proto(request.to);
2475
2476    let channels_to_send = db
2477        .move_channel(session.user_id, channel_id, from_parent, to)
2478        .await?;
2479
2480    if channels_to_send.is_empty() {
2481        response.send(Ack {})?;
2482        return Ok(());
2483    }
2484
2485    let members_from = db.get_channel_members(from_parent).await?;
2486    let members_to = db.get_channel_members(to).await?;
2487
2488    let update = proto::UpdateChannels {
2489        delete_edge: vec![proto::ChannelEdge {
2490            channel_id: channel_id.to_proto(),
2491            parent_id: from_parent.to_proto(),
2492        }],
2493        ..Default::default()
2494    };
2495    let connection_pool = session.connection_pool().await;
2496    for member_id in members_from {
2497        for connection_id in connection_pool.user_connection_ids(member_id) {
2498            session.peer.send(connection_id, update.clone())?;
2499        }
2500    }
2501
2502    let update = proto::UpdateChannels {
2503        channels: channels_to_send
2504            .channels
2505            .into_iter()
2506            .map(|channel| proto::Channel {
2507                id: channel.id.to_proto(),
2508                name: channel.name,
2509            })
2510            .collect(),
2511        insert_edge: channels_to_send.edges,
2512        ..Default::default()
2513    };
2514    for member_id in members_to {
2515        for connection_id in connection_pool.user_connection_ids(member_id) {
2516            session.peer.send(connection_id, update.clone())?;
2517        }
2518    }
2519
2520    response.send(Ack {})?;
2521
2522    Ok(())
2523}
2524
2525async fn get_channel_members(
2526    request: proto::GetChannelMembers,
2527    response: Response<proto::GetChannelMembers>,
2528    session: Session,
2529) -> Result<()> {
2530    let db = session.db().await;
2531    let channel_id = ChannelId::from_proto(request.channel_id);
2532    let members = db
2533        .get_channel_member_details(channel_id, session.user_id)
2534        .await?;
2535    response.send(proto::GetChannelMembersResponse { members })?;
2536    Ok(())
2537}
2538
2539async fn respond_to_channel_invite(
2540    request: proto::RespondToChannelInvite,
2541    response: Response<proto::RespondToChannelInvite>,
2542    session: Session,
2543) -> Result<()> {
2544    let db = session.db().await;
2545    let channel_id = ChannelId::from_proto(request.channel_id);
2546    db.respond_to_channel_invite(channel_id, session.user_id, request.accept)
2547        .await?;
2548
2549    let mut update = proto::UpdateChannels::default();
2550    update
2551        .remove_channel_invitations
2552        .push(channel_id.to_proto());
2553    if request.accept {
2554        let result = db.get_channel_for_user(channel_id, session.user_id).await?;
2555        update
2556            .channels
2557            .extend(
2558                result
2559                    .channels
2560                    .channels
2561                    .into_iter()
2562                    .map(|channel| proto::Channel {
2563                        id: channel.id.to_proto(),
2564                        name: channel.name,
2565                    }),
2566            );
2567        update.insert_edge = result.channels.edges;
2568        update
2569            .channel_participants
2570            .extend(
2571                result
2572                    .channel_participants
2573                    .into_iter()
2574                    .map(|(channel_id, user_ids)| proto::ChannelParticipants {
2575                        channel_id: channel_id.to_proto(),
2576                        participant_user_ids: user_ids.into_iter().map(UserId::to_proto).collect(),
2577                    }),
2578            );
2579        update
2580            .channel_permissions
2581            .extend(
2582                result
2583                    .channels_with_admin_privileges
2584                    .into_iter()
2585                    .map(|channel_id| proto::ChannelPermission {
2586                        channel_id: channel_id.to_proto(),
2587                        is_admin: true,
2588                    }),
2589            );
2590    }
2591    session.peer.send(session.connection_id, update)?;
2592    response.send(proto::Ack {})?;
2593
2594    Ok(())
2595}
2596
2597async fn join_channel(
2598    request: proto::JoinChannel,
2599    response: Response<proto::JoinChannel>,
2600    session: Session,
2601) -> Result<()> {
2602    let channel_id = ChannelId::from_proto(request.channel_id);
2603
2604    let joined_room = {
2605        leave_room_for_session(&session).await?;
2606        let db = session.db().await;
2607
2608        let room_id = db.room_id_for_channel(channel_id).await?;
2609
2610        let joined_room = db
2611            .join_room(room_id, session.user_id, session.connection_id)
2612            .await?;
2613
2614        let live_kit_connection_info = session.live_kit_client.as_ref().and_then(|live_kit| {
2615            let token = live_kit
2616                .room_token(
2617                    &joined_room.room.live_kit_room,
2618                    &session.user_id.to_string(),
2619                )
2620                .trace_err()?;
2621
2622            Some(LiveKitConnectionInfo {
2623                server_url: live_kit.url().into(),
2624                token,
2625            })
2626        });
2627
2628        response.send(proto::JoinRoomResponse {
2629            room: Some(joined_room.room.clone()),
2630            channel_id: joined_room.channel_id.map(|id| id.to_proto()),
2631            live_kit_connection_info,
2632        })?;
2633
2634        room_updated(&joined_room.room, &session.peer);
2635
2636        joined_room.into_inner()
2637    };
2638
2639    channel_updated(
2640        channel_id,
2641        &joined_room.room,
2642        &joined_room.channel_members,
2643        &session.peer,
2644        &*session.connection_pool().await,
2645    );
2646
2647    update_user_contacts(session.user_id, &session).await?;
2648
2649    Ok(())
2650}
2651
2652async fn join_channel_buffer(
2653    request: proto::JoinChannelBuffer,
2654    response: Response<proto::JoinChannelBuffer>,
2655    session: Session,
2656) -> Result<()> {
2657    let db = session.db().await;
2658    let channel_id = ChannelId::from_proto(request.channel_id);
2659
2660    let open_response = db
2661        .join_channel_buffer(channel_id, session.user_id, session.connection_id)
2662        .await?;
2663
2664    let collaborators = open_response.collaborators.clone();
2665    response.send(open_response)?;
2666
2667    let update = UpdateChannelBufferCollaborators {
2668        channel_id: channel_id.to_proto(),
2669        collaborators: collaborators.clone(),
2670    };
2671    channel_buffer_updated(
2672        session.connection_id,
2673        collaborators
2674            .iter()
2675            .filter_map(|collaborator| Some(collaborator.peer_id?.into())),
2676        &update,
2677        &session.peer,
2678    );
2679
2680    Ok(())
2681}
2682
2683async fn update_channel_buffer(
2684    request: proto::UpdateChannelBuffer,
2685    session: Session,
2686) -> Result<()> {
2687    let db = session.db().await;
2688    let channel_id = ChannelId::from_proto(request.channel_id);
2689
2690    let collaborators = db
2691        .update_channel_buffer(channel_id, session.user_id, &request.operations)
2692        .await?;
2693
2694    channel_buffer_updated(
2695        session.connection_id,
2696        collaborators,
2697        &proto::UpdateChannelBuffer {
2698            channel_id: channel_id.to_proto(),
2699            operations: request.operations,
2700        },
2701        &session.peer,
2702    );
2703    Ok(())
2704}
2705
2706async fn rejoin_channel_buffers(
2707    request: proto::RejoinChannelBuffers,
2708    response: Response<proto::RejoinChannelBuffers>,
2709    session: Session,
2710) -> Result<()> {
2711    let db = session.db().await;
2712    let buffers = db
2713        .rejoin_channel_buffers(&request.buffers, session.user_id, session.connection_id)
2714        .await?;
2715
2716    for rejoined_buffer in &buffers {
2717        let collaborators_to_notify = rejoined_buffer
2718            .buffer
2719            .collaborators
2720            .iter()
2721            .filter_map(|c| Some(c.peer_id?.into()));
2722        channel_buffer_updated(
2723            session.connection_id,
2724            collaborators_to_notify,
2725            &proto::UpdateChannelBufferCollaborators {
2726                channel_id: rejoined_buffer.buffer.channel_id,
2727                collaborators: rejoined_buffer.buffer.collaborators.clone(),
2728            },
2729            &session.peer,
2730        );
2731    }
2732
2733    response.send(proto::RejoinChannelBuffersResponse {
2734        buffers: buffers.into_iter().map(|b| b.buffer).collect(),
2735    })?;
2736
2737    Ok(())
2738}
2739
2740async fn leave_channel_buffer(
2741    request: proto::LeaveChannelBuffer,
2742    response: Response<proto::LeaveChannelBuffer>,
2743    session: Session,
2744) -> Result<()> {
2745    let db = session.db().await;
2746    let channel_id = ChannelId::from_proto(request.channel_id);
2747
2748    let left_buffer = db
2749        .leave_channel_buffer(channel_id, session.connection_id)
2750        .await?;
2751
2752    response.send(Ack {})?;
2753
2754    channel_buffer_updated(
2755        session.connection_id,
2756        left_buffer.connections,
2757        &proto::UpdateChannelBufferCollaborators {
2758            channel_id: channel_id.to_proto(),
2759            collaborators: left_buffer.collaborators,
2760        },
2761        &session.peer,
2762    );
2763
2764    Ok(())
2765}
2766
2767fn channel_buffer_updated<T: EnvelopedMessage>(
2768    sender_id: ConnectionId,
2769    collaborators: impl IntoIterator<Item = ConnectionId>,
2770    message: &T,
2771    peer: &Peer,
2772) {
2773    broadcast(Some(sender_id), collaborators.into_iter(), |peer_id| {
2774        peer.send(peer_id.into(), message.clone())
2775    });
2776}
2777
2778async fn send_channel_message(
2779    request: proto::SendChannelMessage,
2780    response: Response<proto::SendChannelMessage>,
2781    session: Session,
2782) -> Result<()> {
2783    // Validate the message body.
2784    let body = request.body.trim().to_string();
2785    if body.len() > MAX_MESSAGE_LEN {
2786        return Err(anyhow!("message is too long"))?;
2787    }
2788    if body.is_empty() {
2789        return Err(anyhow!("message can't be blank"))?;
2790    }
2791
2792    let timestamp = OffsetDateTime::now_utc();
2793    let nonce = request
2794        .nonce
2795        .ok_or_else(|| anyhow!("nonce can't be blank"))?;
2796
2797    let channel_id = ChannelId::from_proto(request.channel_id);
2798    let (message_id, connection_ids) = session
2799        .db()
2800        .await
2801        .create_channel_message(
2802            channel_id,
2803            session.user_id,
2804            &body,
2805            timestamp,
2806            nonce.clone().into(),
2807        )
2808        .await?;
2809    let message = proto::ChannelMessage {
2810        sender_id: session.user_id.to_proto(),
2811        id: message_id.to_proto(),
2812        body,
2813        timestamp: timestamp.unix_timestamp() as u64,
2814        nonce: Some(nonce),
2815    };
2816    broadcast(Some(session.connection_id), connection_ids, |connection| {
2817        session.peer.send(
2818            connection,
2819            proto::ChannelMessageSent {
2820                channel_id: channel_id.to_proto(),
2821                message: Some(message.clone()),
2822            },
2823        )
2824    });
2825    response.send(proto::SendChannelMessageResponse {
2826        message: Some(message),
2827    })?;
2828    Ok(())
2829}
2830
2831async fn remove_channel_message(
2832    request: proto::RemoveChannelMessage,
2833    response: Response<proto::RemoveChannelMessage>,
2834    session: Session,
2835) -> Result<()> {
2836    let channel_id = ChannelId::from_proto(request.channel_id);
2837    let message_id = MessageId::from_proto(request.message_id);
2838    let connection_ids = session
2839        .db()
2840        .await
2841        .remove_channel_message(channel_id, message_id, session.user_id)
2842        .await?;
2843    broadcast(Some(session.connection_id), connection_ids, |connection| {
2844        session.peer.send(connection, request.clone())
2845    });
2846    response.send(proto::Ack {})?;
2847    Ok(())
2848}
2849
2850async fn join_channel_chat(
2851    request: proto::JoinChannelChat,
2852    response: Response<proto::JoinChannelChat>,
2853    session: Session,
2854) -> Result<()> {
2855    let channel_id = ChannelId::from_proto(request.channel_id);
2856
2857    let db = session.db().await;
2858    db.join_channel_chat(channel_id, session.connection_id, session.user_id)
2859        .await?;
2860    let messages = db
2861        .get_channel_messages(channel_id, session.user_id, MESSAGE_COUNT_PER_PAGE, None)
2862        .await?;
2863    response.send(proto::JoinChannelChatResponse {
2864        done: messages.len() < MESSAGE_COUNT_PER_PAGE,
2865        messages,
2866    })?;
2867    Ok(())
2868}
2869
2870async fn leave_channel_chat(request: proto::LeaveChannelChat, session: Session) -> Result<()> {
2871    let channel_id = ChannelId::from_proto(request.channel_id);
2872    session
2873        .db()
2874        .await
2875        .leave_channel_chat(channel_id, session.connection_id, session.user_id)
2876        .await?;
2877    Ok(())
2878}
2879
2880async fn get_channel_messages(
2881    request: proto::GetChannelMessages,
2882    response: Response<proto::GetChannelMessages>,
2883    session: Session,
2884) -> Result<()> {
2885    let channel_id = ChannelId::from_proto(request.channel_id);
2886    let messages = session
2887        .db()
2888        .await
2889        .get_channel_messages(
2890            channel_id,
2891            session.user_id,
2892            MESSAGE_COUNT_PER_PAGE,
2893            Some(MessageId::from_proto(request.before_message_id)),
2894        )
2895        .await?;
2896    response.send(proto::GetChannelMessagesResponse {
2897        done: messages.len() < MESSAGE_COUNT_PER_PAGE,
2898        messages,
2899    })?;
2900    Ok(())
2901}
2902
2903async fn update_diff_base(request: proto::UpdateDiffBase, session: Session) -> Result<()> {
2904    let project_id = ProjectId::from_proto(request.project_id);
2905    let project_connection_ids = session
2906        .db()
2907        .await
2908        .project_connection_ids(project_id, session.connection_id)
2909        .await?;
2910    broadcast(
2911        Some(session.connection_id),
2912        project_connection_ids.iter().copied(),
2913        |connection_id| {
2914            session
2915                .peer
2916                .forward_send(session.connection_id, connection_id, request.clone())
2917        },
2918    );
2919    Ok(())
2920}
2921
2922async fn get_private_user_info(
2923    _request: proto::GetPrivateUserInfo,
2924    response: Response<proto::GetPrivateUserInfo>,
2925    session: Session,
2926) -> Result<()> {
2927    let db = session.db().await;
2928
2929    let metrics_id = db.get_user_metrics_id(session.user_id).await?;
2930    let user = db
2931        .get_user_by_id(session.user_id)
2932        .await?
2933        .ok_or_else(|| anyhow!("user not found"))?;
2934    let flags = db.get_user_flags(session.user_id).await?;
2935
2936    response.send(proto::GetPrivateUserInfoResponse {
2937        metrics_id,
2938        staff: user.admin,
2939        flags,
2940    })?;
2941    Ok(())
2942}
2943
2944fn to_axum_message(message: TungsteniteMessage) -> AxumMessage {
2945    match message {
2946        TungsteniteMessage::Text(payload) => AxumMessage::Text(payload),
2947        TungsteniteMessage::Binary(payload) => AxumMessage::Binary(payload),
2948        TungsteniteMessage::Ping(payload) => AxumMessage::Ping(payload),
2949        TungsteniteMessage::Pong(payload) => AxumMessage::Pong(payload),
2950        TungsteniteMessage::Close(frame) => AxumMessage::Close(frame.map(|frame| AxumCloseFrame {
2951            code: frame.code.into(),
2952            reason: frame.reason,
2953        })),
2954    }
2955}
2956
2957fn to_tungstenite_message(message: AxumMessage) -> TungsteniteMessage {
2958    match message {
2959        AxumMessage::Text(payload) => TungsteniteMessage::Text(payload),
2960        AxumMessage::Binary(payload) => TungsteniteMessage::Binary(payload),
2961        AxumMessage::Ping(payload) => TungsteniteMessage::Ping(payload),
2962        AxumMessage::Pong(payload) => TungsteniteMessage::Pong(payload),
2963        AxumMessage::Close(frame) => {
2964            TungsteniteMessage::Close(frame.map(|frame| TungsteniteCloseFrame {
2965                code: frame.code.into(),
2966                reason: frame.reason,
2967            }))
2968        }
2969    }
2970}
2971
2972fn build_initial_channels_update(
2973    channels: ChannelsForUser,
2974    channel_invites: Vec<db::Channel>,
2975) -> proto::UpdateChannels {
2976    let mut update = proto::UpdateChannels::default();
2977
2978    for channel in channels.channels.channels {
2979        update.channels.push(proto::Channel {
2980            id: channel.id.to_proto(),
2981            name: channel.name,
2982        });
2983    }
2984
2985    update.insert_edge = channels.channels.edges;
2986
2987    for (channel_id, participants) in channels.channel_participants {
2988        update
2989            .channel_participants
2990            .push(proto::ChannelParticipants {
2991                channel_id: channel_id.to_proto(),
2992                participant_user_ids: participants.into_iter().map(|id| id.to_proto()).collect(),
2993            });
2994    }
2995
2996    update
2997        .channel_permissions
2998        .extend(
2999            channels
3000                .channels_with_admin_privileges
3001                .into_iter()
3002                .map(|id| proto::ChannelPermission {
3003                    channel_id: id.to_proto(),
3004                    is_admin: true,
3005                }),
3006        );
3007
3008    for channel in channel_invites {
3009        update.channel_invitations.push(proto::Channel {
3010            id: channel.id.to_proto(),
3011            name: channel.name,
3012        });
3013    }
3014
3015    update
3016}
3017
3018fn build_initial_contacts_update(
3019    contacts: Vec<db::Contact>,
3020    pool: &ConnectionPool,
3021) -> proto::UpdateContacts {
3022    let mut update = proto::UpdateContacts::default();
3023
3024    for contact in contacts {
3025        match contact {
3026            db::Contact::Accepted {
3027                user_id,
3028                should_notify,
3029                busy,
3030            } => {
3031                update
3032                    .contacts
3033                    .push(contact_for_user(user_id, should_notify, busy, &pool));
3034            }
3035            db::Contact::Outgoing { user_id } => update.outgoing_requests.push(user_id.to_proto()),
3036            db::Contact::Incoming {
3037                user_id,
3038                should_notify,
3039            } => update
3040                .incoming_requests
3041                .push(proto::IncomingContactRequest {
3042                    requester_id: user_id.to_proto(),
3043                    should_notify,
3044                }),
3045        }
3046    }
3047
3048    update
3049}
3050
3051fn contact_for_user(
3052    user_id: UserId,
3053    should_notify: bool,
3054    busy: bool,
3055    pool: &ConnectionPool,
3056) -> proto::Contact {
3057    proto::Contact {
3058        user_id: user_id.to_proto(),
3059        online: pool.is_user_online(user_id),
3060        busy,
3061        should_notify,
3062    }
3063}
3064
3065fn room_updated(room: &proto::Room, peer: &Peer) {
3066    broadcast(
3067        None,
3068        room.participants
3069            .iter()
3070            .filter_map(|participant| Some(participant.peer_id?.into())),
3071        |peer_id| {
3072            peer.send(
3073                peer_id.into(),
3074                proto::RoomUpdated {
3075                    room: Some(room.clone()),
3076                },
3077            )
3078        },
3079    );
3080}
3081
3082fn channel_updated(
3083    channel_id: ChannelId,
3084    room: &proto::Room,
3085    channel_members: &[UserId],
3086    peer: &Peer,
3087    pool: &ConnectionPool,
3088) {
3089    let participants = room
3090        .participants
3091        .iter()
3092        .map(|p| p.user_id)
3093        .collect::<Vec<_>>();
3094
3095    broadcast(
3096        None,
3097        channel_members
3098            .iter()
3099            .flat_map(|user_id| pool.user_connection_ids(*user_id)),
3100        |peer_id| {
3101            peer.send(
3102                peer_id.into(),
3103                proto::UpdateChannels {
3104                    channel_participants: vec![proto::ChannelParticipants {
3105                        channel_id: channel_id.to_proto(),
3106                        participant_user_ids: participants.clone(),
3107                    }],
3108                    ..Default::default()
3109                },
3110            )
3111        },
3112    );
3113}
3114
3115async fn update_user_contacts(user_id: UserId, session: &Session) -> Result<()> {
3116    let db = session.db().await;
3117
3118    let contacts = db.get_contacts(user_id).await?;
3119    let busy = db.is_user_busy(user_id).await?;
3120
3121    let pool = session.connection_pool().await;
3122    let updated_contact = contact_for_user(user_id, false, busy, &pool);
3123    for contact in contacts {
3124        if let db::Contact::Accepted {
3125            user_id: contact_user_id,
3126            ..
3127        } = contact
3128        {
3129            for contact_conn_id in pool.user_connection_ids(contact_user_id) {
3130                session
3131                    .peer
3132                    .send(
3133                        contact_conn_id,
3134                        proto::UpdateContacts {
3135                            contacts: vec![updated_contact.clone()],
3136                            remove_contacts: Default::default(),
3137                            incoming_requests: Default::default(),
3138                            remove_incoming_requests: Default::default(),
3139                            outgoing_requests: Default::default(),
3140                            remove_outgoing_requests: Default::default(),
3141                        },
3142                    )
3143                    .trace_err();
3144            }
3145        }
3146    }
3147    Ok(())
3148}
3149
3150async fn leave_room_for_session(session: &Session) -> Result<()> {
3151    let mut contacts_to_update = HashSet::default();
3152
3153    let room_id;
3154    let canceled_calls_to_user_ids;
3155    let live_kit_room;
3156    let delete_live_kit_room;
3157    let room;
3158    let channel_members;
3159    let channel_id;
3160
3161    if let Some(mut left_room) = session.db().await.leave_room(session.connection_id).await? {
3162        contacts_to_update.insert(session.user_id);
3163
3164        for project in left_room.left_projects.values() {
3165            project_left(project, session);
3166        }
3167
3168        room_id = RoomId::from_proto(left_room.room.id);
3169        canceled_calls_to_user_ids = mem::take(&mut left_room.canceled_calls_to_user_ids);
3170        live_kit_room = mem::take(&mut left_room.room.live_kit_room);
3171        delete_live_kit_room = left_room.deleted;
3172        room = mem::take(&mut left_room.room);
3173        channel_members = mem::take(&mut left_room.channel_members);
3174        channel_id = left_room.channel_id;
3175
3176        room_updated(&room, &session.peer);
3177    } else {
3178        return Ok(());
3179    }
3180
3181    if let Some(channel_id) = channel_id {
3182        channel_updated(
3183            channel_id,
3184            &room,
3185            &channel_members,
3186            &session.peer,
3187            &*session.connection_pool().await,
3188        );
3189    }
3190
3191    {
3192        let pool = session.connection_pool().await;
3193        for canceled_user_id in canceled_calls_to_user_ids {
3194            for connection_id in pool.user_connection_ids(canceled_user_id) {
3195                session
3196                    .peer
3197                    .send(
3198                        connection_id,
3199                        proto::CallCanceled {
3200                            room_id: room_id.to_proto(),
3201                        },
3202                    )
3203                    .trace_err();
3204            }
3205            contacts_to_update.insert(canceled_user_id);
3206        }
3207    }
3208
3209    for contact_user_id in contacts_to_update {
3210        update_user_contacts(contact_user_id, &session).await?;
3211    }
3212
3213    if let Some(live_kit) = session.live_kit_client.as_ref() {
3214        live_kit
3215            .remove_participant(live_kit_room.clone(), session.user_id.to_string())
3216            .await
3217            .trace_err();
3218
3219        if delete_live_kit_room {
3220            live_kit.delete_room(live_kit_room).await.trace_err();
3221        }
3222    }
3223
3224    Ok(())
3225}
3226
3227async fn leave_channel_buffers_for_session(session: &Session) -> Result<()> {
3228    let left_channel_buffers = session
3229        .db()
3230        .await
3231        .leave_channel_buffers(session.connection_id)
3232        .await?;
3233
3234    for left_buffer in left_channel_buffers {
3235        channel_buffer_updated(
3236            session.connection_id,
3237            left_buffer.connections,
3238            &proto::UpdateChannelBufferCollaborators {
3239                channel_id: left_buffer.channel_id.to_proto(),
3240                collaborators: left_buffer.collaborators,
3241            },
3242            &session.peer,
3243        );
3244    }
3245
3246    Ok(())
3247}
3248
3249fn project_left(project: &db::LeftProject, session: &Session) {
3250    for connection_id in &project.connection_ids {
3251        if project.host_user_id == session.user_id {
3252            session
3253                .peer
3254                .send(
3255                    *connection_id,
3256                    proto::UnshareProject {
3257                        project_id: project.id.to_proto(),
3258                    },
3259                )
3260                .trace_err();
3261        } else {
3262            session
3263                .peer
3264                .send(
3265                    *connection_id,
3266                    proto::RemoveProjectCollaborator {
3267                        project_id: project.id.to_proto(),
3268                        peer_id: Some(session.connection_id.into()),
3269                    },
3270                )
3271                .trace_err();
3272        }
3273    }
3274}
3275
3276pub trait ResultExt {
3277    type Ok;
3278
3279    fn trace_err(self) -> Option<Self::Ok>;
3280}
3281
3282impl<T, E> ResultExt for Result<T, E>
3283where
3284    E: std::fmt::Debug,
3285{
3286    type Ok = T;
3287
3288    fn trace_err(self) -> Option<T> {
3289        match self {
3290            Ok(value) => Some(value),
3291            Err(error) => {
3292                tracing::error!("{:?}", error);
3293                None
3294            }
3295        }
3296    }
3297}