1mod store;
   2
   3use crate::{
   4    auth,
   5    db::{self, ChannelId, MessageId, ProjectId, User, UserId},
   6    AppState, Result,
   7};
   8use anyhow::anyhow;
   9use async_tungstenite::tungstenite::{
  10    protocol::CloseFrame as TungsteniteCloseFrame, Message as TungsteniteMessage,
  11};
  12use axum::{
  13    body::Body,
  14    extract::{
  15        ws::{CloseFrame as AxumCloseFrame, Message as AxumMessage},
  16        ConnectInfo, WebSocketUpgrade,
  17    },
  18    headers::{Header, HeaderName},
  19    http::StatusCode,
  20    middleware,
  21    response::IntoResponse,
  22    routing::get,
  23    Extension, Router, TypedHeader,
  24};
  25use collections::{HashMap, HashSet};
  26use futures::{
  27    channel::{mpsc, oneshot},
  28    future::{self, BoxFuture},
  29    stream::FuturesUnordered,
  30    FutureExt, SinkExt, StreamExt, TryStreamExt,
  31};
  32use lazy_static::lazy_static;
  33use prometheus::{register_int_gauge, IntGauge};
  34use rpc::{
  35    proto::{self, AnyTypedEnvelope, EntityMessage, EnvelopedMessage, RequestMessage},
  36    Connection, ConnectionId, Peer, Receipt, TypedEnvelope,
  37};
  38use serde::{Serialize, Serializer};
  39use std::{
  40    any::TypeId,
  41    future::Future,
  42    marker::PhantomData,
  43    net::SocketAddr,
  44    ops::{Deref, DerefMut},
  45    os::unix::prelude::OsStrExt,
  46    rc::Rc,
  47    sync::{
  48        atomic::{AtomicBool, Ordering::SeqCst},
  49        Arc,
  50    },
  51    time::Duration,
  52};
  53pub use store::{Store, Worktree};
  54use time::OffsetDateTime;
  55use tokio::{
  56    sync::{Mutex, MutexGuard},
  57    time::Sleep,
  58};
  59use tower::ServiceBuilder;
  60use tracing::{info_span, instrument, Instrument};
  61
  62lazy_static! {
  63    static ref METRIC_CONNECTIONS: IntGauge =
  64        register_int_gauge!("connections", "number of connections").unwrap();
  65    static ref METRIC_REGISTERED_PROJECTS: IntGauge =
  66        register_int_gauge!("registered_projects", "number of registered projects").unwrap();
  67    static ref METRIC_ACTIVE_PROJECTS: IntGauge =
  68        register_int_gauge!("active_projects", "number of active projects").unwrap();
  69    static ref METRIC_SHARED_PROJECTS: IntGauge = register_int_gauge!(
  70        "shared_projects",
  71        "number of open projects with one or more guests"
  72    )
  73    .unwrap();
  74}
  75
  76type MessageHandler =
  77    Box<dyn Send + Sync + Fn(Arc<Server>, Box<dyn AnyTypedEnvelope>) -> BoxFuture<'static, ()>>;
  78
  79struct Response<R> {
  80    server: Arc<Server>,
  81    receipt: Receipt<R>,
  82    responded: Arc<AtomicBool>,
  83}
  84
  85impl<R: RequestMessage> Response<R> {
  86    fn send(self, payload: R::Response) -> Result<()> {
  87        self.responded.store(true, SeqCst);
  88        self.server.peer.respond(self.receipt, payload)?;
  89        Ok(())
  90    }
  91}
  92
  93pub struct Server {
  94    peer: Arc<Peer>,
  95    pub(crate) store: Mutex<Store>,
  96    app_state: Arc<AppState>,
  97    handlers: HashMap<TypeId, MessageHandler>,
  98    notifications: Option<mpsc::UnboundedSender<()>>,
  99}
 100
 101pub trait Executor: Send + Clone {
 102    type Sleep: Send + Future;
 103    fn spawn_detached<F: 'static + Send + Future<Output = ()>>(&self, future: F);
 104    fn sleep(&self, duration: Duration) -> Self::Sleep;
 105}
 106
 107#[derive(Clone)]
 108pub struct RealExecutor;
 109
 110const MESSAGE_COUNT_PER_PAGE: usize = 100;
 111const MAX_MESSAGE_LEN: usize = 1024;
 112
 113pub(crate) struct StoreGuard<'a> {
 114    guard: MutexGuard<'a, Store>,
 115    _not_send: PhantomData<Rc<()>>,
 116}
 117
 118#[derive(Serialize)]
 119pub struct ServerSnapshot<'a> {
 120    peer: &'a Peer,
 121    #[serde(serialize_with = "serialize_deref")]
 122    store: StoreGuard<'a>,
 123}
 124
 125pub fn serialize_deref<S, T, U>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
 126where
 127    S: Serializer,
 128    T: Deref<Target = U>,
 129    U: Serialize,
 130{
 131    Serialize::serialize(value.deref(), serializer)
 132}
 133
 134impl Server {
 135    pub fn new(
 136        app_state: Arc<AppState>,
 137        notifications: Option<mpsc::UnboundedSender<()>>,
 138    ) -> Arc<Self> {
 139        let mut server = Self {
 140            peer: Peer::new(),
 141            app_state,
 142            store: Default::default(),
 143            handlers: Default::default(),
 144            notifications,
 145        };
 146
 147        server
 148            .add_request_handler(Server::ping)
 149            .add_request_handler(Server::create_room)
 150            .add_request_handler(Server::join_room)
 151            .add_message_handler(Server::leave_room)
 152            .add_request_handler(Server::call)
 153            .add_request_handler(Server::cancel_call)
 154            .add_message_handler(Server::decline_call)
 155            .add_request_handler(Server::update_participant_location)
 156            .add_request_handler(Server::share_project)
 157            .add_message_handler(Server::unshare_project)
 158            .add_request_handler(Server::join_project)
 159            .add_message_handler(Server::leave_project)
 160            .add_message_handler(Server::update_project)
 161            .add_message_handler(Server::register_project_activity)
 162            .add_request_handler(Server::update_worktree)
 163            .add_message_handler(Server::update_worktree_extensions)
 164            .add_message_handler(Server::start_language_server)
 165            .add_message_handler(Server::update_language_server)
 166            .add_message_handler(Server::update_diagnostic_summary)
 167            .add_request_handler(Server::forward_project_request::<proto::GetHover>)
 168            .add_request_handler(Server::forward_project_request::<proto::GetDefinition>)
 169            .add_request_handler(Server::forward_project_request::<proto::GetTypeDefinition>)
 170            .add_request_handler(Server::forward_project_request::<proto::GetReferences>)
 171            .add_request_handler(Server::forward_project_request::<proto::SearchProject>)
 172            .add_request_handler(Server::forward_project_request::<proto::GetDocumentHighlights>)
 173            .add_request_handler(Server::forward_project_request::<proto::GetProjectSymbols>)
 174            .add_request_handler(Server::forward_project_request::<proto::OpenBufferForSymbol>)
 175            .add_request_handler(Server::forward_project_request::<proto::OpenBufferById>)
 176            .add_request_handler(Server::forward_project_request::<proto::OpenBufferByPath>)
 177            .add_request_handler(Server::forward_project_request::<proto::GetCompletions>)
 178            .add_request_handler(
 179                Server::forward_project_request::<proto::ApplyCompletionAdditionalEdits>,
 180            )
 181            .add_request_handler(Server::forward_project_request::<proto::GetCodeActions>)
 182            .add_request_handler(Server::forward_project_request::<proto::ApplyCodeAction>)
 183            .add_request_handler(Server::forward_project_request::<proto::PrepareRename>)
 184            .add_request_handler(Server::forward_project_request::<proto::PerformRename>)
 185            .add_request_handler(Server::forward_project_request::<proto::ReloadBuffers>)
 186            .add_request_handler(Server::forward_project_request::<proto::FormatBuffers>)
 187            .add_request_handler(Server::forward_project_request::<proto::CreateProjectEntry>)
 188            .add_request_handler(Server::forward_project_request::<proto::RenameProjectEntry>)
 189            .add_request_handler(Server::forward_project_request::<proto::CopyProjectEntry>)
 190            .add_request_handler(Server::forward_project_request::<proto::DeleteProjectEntry>)
 191            .add_message_handler(Server::create_buffer_for_peer)
 192            .add_request_handler(Server::update_buffer)
 193            .add_message_handler(Server::update_buffer_file)
 194            .add_message_handler(Server::buffer_reloaded)
 195            .add_message_handler(Server::buffer_saved)
 196            .add_request_handler(Server::save_buffer)
 197            .add_request_handler(Server::get_channels)
 198            .add_request_handler(Server::get_users)
 199            .add_request_handler(Server::fuzzy_search_users)
 200            .add_request_handler(Server::request_contact)
 201            .add_request_handler(Server::remove_contact)
 202            .add_request_handler(Server::respond_to_contact_request)
 203            .add_request_handler(Server::join_channel)
 204            .add_message_handler(Server::leave_channel)
 205            .add_request_handler(Server::send_channel_message)
 206            .add_request_handler(Server::follow)
 207            .add_message_handler(Server::unfollow)
 208            .add_message_handler(Server::update_followers)
 209            .add_request_handler(Server::get_channel_messages)
 210            .add_message_handler(Server::update_diff_base)
 211            .add_request_handler(Server::get_private_user_info);
 212
 213        Arc::new(server)
 214    }
 215
 216    fn add_message_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
 217    where
 218        F: 'static + Send + Sync + Fn(Arc<Self>, TypedEnvelope<M>) -> Fut,
 219        Fut: 'static + Send + Future<Output = Result<()>>,
 220        M: EnvelopedMessage,
 221    {
 222        let prev_handler = self.handlers.insert(
 223            TypeId::of::<M>(),
 224            Box::new(move |server, envelope| {
 225                let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
 226                let span = info_span!(
 227                    "handle message",
 228                    payload_type = envelope.payload_type_name()
 229                );
 230                span.in_scope(|| {
 231                    tracing::info!(
 232                        payload_type = envelope.payload_type_name(),
 233                        "message received"
 234                    );
 235                });
 236                let future = (handler)(server, *envelope);
 237                async move {
 238                    if let Err(error) = future.await {
 239                        tracing::error!(%error, "error handling message");
 240                    }
 241                }
 242                .instrument(span)
 243                .boxed()
 244            }),
 245        );
 246        if prev_handler.is_some() {
 247            panic!("registered a handler for the same message twice");
 248        }
 249        self
 250    }
 251
 252    /// Handle a request while holding a lock to the store. This is useful when we're registering
 253    /// a connection but we want to respond on the connection before anybody else can send on it.
 254    fn add_request_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
 255    where
 256        F: 'static + Send + Sync + Fn(Arc<Self>, TypedEnvelope<M>, Response<M>) -> Fut,
 257        Fut: Send + Future<Output = Result<()>>,
 258        M: RequestMessage,
 259    {
 260        let handler = Arc::new(handler);
 261        self.add_message_handler(move |server, envelope| {
 262            let receipt = envelope.receipt();
 263            let handler = handler.clone();
 264            async move {
 265                let responded = Arc::new(AtomicBool::default());
 266                let response = Response {
 267                    server: server.clone(),
 268                    responded: responded.clone(),
 269                    receipt: envelope.receipt(),
 270                };
 271                match (handler)(server.clone(), envelope, response).await {
 272                    Ok(()) => {
 273                        if responded.load(std::sync::atomic::Ordering::SeqCst) {
 274                            Ok(())
 275                        } else {
 276                            Err(anyhow!("handler did not send a response"))?
 277                        }
 278                    }
 279                    Err(error) => {
 280                        server.peer.respond_with_error(
 281                            receipt,
 282                            proto::Error {
 283                                message: error.to_string(),
 284                            },
 285                        )?;
 286                        Err(error)
 287                    }
 288                }
 289            }
 290        })
 291    }
 292
 293    /// Start a long lived task that records which users are active in which projects.
 294    pub fn start_recording_project_activity<E: 'static + Executor>(
 295        self: &Arc<Self>,
 296        interval: Duration,
 297        executor: E,
 298    ) {
 299        executor.spawn_detached({
 300            let this = Arc::downgrade(self);
 301            let executor = executor.clone();
 302            async move {
 303                let mut period_start = OffsetDateTime::now_utc();
 304                let mut active_projects = Vec::<(UserId, ProjectId)>::new();
 305                loop {
 306                    let sleep = executor.sleep(interval);
 307                    sleep.await;
 308                    let this = if let Some(this) = this.upgrade() {
 309                        this
 310                    } else {
 311                        break;
 312                    };
 313
 314                    active_projects.clear();
 315                    active_projects.extend(this.store().await.projects().flat_map(
 316                        |(project_id, project)| {
 317                            project.guests.values().chain([&project.host]).filter_map(
 318                                |collaborator| {
 319                                    if !collaborator.admin
 320                                        && collaborator
 321                                            .last_activity
 322                                            .map_or(false, |activity| activity > period_start)
 323                                    {
 324                                        Some((collaborator.user_id, *project_id))
 325                                    } else {
 326                                        None
 327                                    }
 328                                },
 329                            )
 330                        },
 331                    ));
 332
 333                    let period_end = OffsetDateTime::now_utc();
 334                    this.app_state
 335                        .db
 336                        .record_user_activity(period_start..period_end, &active_projects)
 337                        .await
 338                        .trace_err();
 339                    period_start = period_end;
 340                }
 341            }
 342        });
 343    }
 344
 345    pub fn handle_connection<E: Executor>(
 346        self: &Arc<Self>,
 347        connection: Connection,
 348        address: String,
 349        user: User,
 350        mut send_connection_id: Option<oneshot::Sender<ConnectionId>>,
 351        executor: E,
 352    ) -> impl Future<Output = Result<()>> {
 353        let mut this = self.clone();
 354        let user_id = user.id;
 355        let login = user.github_login;
 356        let span = info_span!("handle connection", %user_id, %login, %address);
 357        async move {
 358            let (connection_id, handle_io, mut incoming_rx) = this
 359                .peer
 360                .add_connection(connection, {
 361                    let executor = executor.clone();
 362                    move |duration| {
 363                        let timer = executor.sleep(duration);
 364                        async move {
 365                            timer.await;
 366                        }
 367                    }
 368                });
 369
 370            tracing::info!(%user_id, %login, %connection_id, %address, "connection opened");
 371            this.peer.send(connection_id, proto::Hello { peer_id: connection_id.0 })?;
 372            tracing::info!(%user_id, %login, %connection_id, %address, "sent hello message");
 373
 374            if let Some(send_connection_id) = send_connection_id.take() {
 375                let _ = send_connection_id.send(connection_id);
 376            }
 377
 378            if !user.connected_once {
 379                this.peer.send(connection_id, proto::ShowContacts {})?;
 380                this.app_state.db.set_user_connected_once(user_id, true).await?;
 381            }
 382
 383            let (contacts, invite_code) = future::try_join(
 384                this.app_state.db.get_contacts(user_id),
 385                this.app_state.db.get_invite_code_for_user(user_id)
 386            ).await?;
 387
 388            {
 389                let mut store = this.store().await;
 390                let incoming_call = store.add_connection(connection_id, user_id, user.admin);
 391                if let Some(incoming_call) = incoming_call {
 392                    this.peer.send(connection_id, incoming_call)?;
 393                }
 394
 395                this.peer.send(connection_id, store.build_initial_contacts_update(contacts))?;
 396
 397                if let Some((code, count)) = invite_code {
 398                    this.peer.send(connection_id, proto::UpdateInviteInfo {
 399                        url: format!("{}{}", this.app_state.invite_link_prefix, code),
 400                        count,
 401                    })?;
 402                }
 403            }
 404            this.update_user_contacts(user_id).await?;
 405
 406            let handle_io = handle_io.fuse();
 407            futures::pin_mut!(handle_io);
 408
 409            // Handlers for foreground messages are pushed into the following `FuturesUnordered`.
 410            // This prevents deadlocks when e.g., client A performs a request to client B and
 411            // client B performs a request to client A. If both clients stop processing further
 412            // messages until their respective request completes, they won't have a chance to
 413            // respond to the other client's request and cause a deadlock.
 414            //
 415            // This arrangement ensures we will attempt to process earlier messages first, but fall
 416            // back to processing messages arrived later in the spirit of making progress.
 417            let mut foreground_message_handlers = FuturesUnordered::new();
 418            loop {
 419                let next_message = incoming_rx.next().fuse();
 420                futures::pin_mut!(next_message);
 421                futures::select_biased! {
 422                    result = handle_io => {
 423                        if let Err(error) = result {
 424                            tracing::error!(?error, %user_id, %login, %connection_id, %address, "error handling I/O");
 425                        }
 426                        break;
 427                    }
 428                    _ = foreground_message_handlers.next() => {}
 429                    message = next_message => {
 430                        if let Some(message) = message {
 431                            let type_name = message.payload_type_name();
 432                            let span = tracing::info_span!("receive message", %user_id, %login, %connection_id, %address, type_name);
 433                            let span_enter = span.enter();
 434                            if let Some(handler) = this.handlers.get(&message.payload_type_id()) {
 435                                let notifications = this.notifications.clone();
 436                                let is_background = message.is_background();
 437                                let handle_message = (handler)(this.clone(), message);
 438
 439                                drop(span_enter);
 440                                let handle_message = async move {
 441                                    handle_message.await;
 442                                    if let Some(mut notifications) = notifications {
 443                                        let _ = notifications.send(()).await;
 444                                    }
 445                                }.instrument(span);
 446
 447                                if is_background {
 448                                    executor.spawn_detached(handle_message);
 449                                } else {
 450                                    foreground_message_handlers.push(handle_message);
 451                                }
 452                            } else {
 453                                tracing::error!(%user_id, %login, %connection_id, %address, "no message handler");
 454                            }
 455                        } else {
 456                            tracing::info!(%user_id, %login, %connection_id, %address, "connection closed");
 457                            break;
 458                        }
 459                    }
 460                }
 461            }
 462
 463            drop(foreground_message_handlers);
 464            tracing::info!(%user_id, %login, %connection_id, %address, "signing out");
 465            if let Err(error) = this.sign_out(connection_id).await {
 466                tracing::error!(%user_id, %login, %connection_id, %address, ?error, "error signing out");
 467            }
 468
 469            Ok(())
 470        }.instrument(span)
 471    }
 472
 473    #[instrument(skip(self), err)]
 474    async fn sign_out(self: &mut Arc<Self>, connection_id: ConnectionId) -> Result<()> {
 475        self.peer.disconnect(connection_id);
 476
 477        let mut projects_to_unshare = Vec::new();
 478        let mut contacts_to_update = HashSet::default();
 479        let mut room_left = None;
 480        {
 481            let mut store = self.store().await;
 482
 483            #[cfg(test)]
 484            let removed_connection = store.remove_connection(connection_id).unwrap();
 485            #[cfg(not(test))]
 486            let removed_connection = store.remove_connection(connection_id)?;
 487
 488            for project in removed_connection.hosted_projects {
 489                projects_to_unshare.push(project.id);
 490                broadcast(connection_id, project.guests.keys().copied(), |conn_id| {
 491                    self.peer.send(
 492                        conn_id,
 493                        proto::UnshareProject {
 494                            project_id: project.id.to_proto(),
 495                        },
 496                    )
 497                });
 498            }
 499
 500            for project in removed_connection.guest_projects {
 501                broadcast(connection_id, project.connection_ids, |conn_id| {
 502                    self.peer.send(
 503                        conn_id,
 504                        proto::RemoveProjectCollaborator {
 505                            project_id: project.id.to_proto(),
 506                            peer_id: connection_id.0,
 507                        },
 508                    )
 509                });
 510            }
 511
 512            if let Some(room) = removed_connection.room {
 513                self.room_updated(&room);
 514                room_left = Some(self.room_left(&room, connection_id));
 515            }
 516
 517            contacts_to_update.insert(removed_connection.user_id);
 518            for connection_id in removed_connection.canceled_call_connection_ids {
 519                self.peer
 520                    .send(connection_id, proto::CallCanceled {})
 521                    .trace_err();
 522                contacts_to_update.extend(store.user_id_for_connection(connection_id).ok());
 523            }
 524        };
 525
 526        if let Some(room_left) = room_left {
 527            room_left.await.trace_err();
 528        }
 529
 530        for user_id in contacts_to_update {
 531            self.update_user_contacts(user_id).await.trace_err();
 532        }
 533
 534        for project_id in projects_to_unshare {
 535            self.app_state
 536                .db
 537                .unregister_project(project_id)
 538                .await
 539                .trace_err();
 540        }
 541
 542        Ok(())
 543    }
 544
 545    pub async fn invite_code_redeemed(
 546        self: &Arc<Self>,
 547        inviter_id: UserId,
 548        invitee_id: UserId,
 549    ) -> Result<()> {
 550        if let Some(user) = self.app_state.db.get_user_by_id(inviter_id).await? {
 551            if let Some(code) = &user.invite_code {
 552                let store = self.store().await;
 553                let invitee_contact = store.contact_for_user(invitee_id, true);
 554                for connection_id in store.connection_ids_for_user(inviter_id) {
 555                    self.peer.send(
 556                        connection_id,
 557                        proto::UpdateContacts {
 558                            contacts: vec![invitee_contact.clone()],
 559                            ..Default::default()
 560                        },
 561                    )?;
 562                    self.peer.send(
 563                        connection_id,
 564                        proto::UpdateInviteInfo {
 565                            url: format!("{}{}", self.app_state.invite_link_prefix, &code),
 566                            count: user.invite_count as u32,
 567                        },
 568                    )?;
 569                }
 570            }
 571        }
 572        Ok(())
 573    }
 574
 575    pub async fn invite_count_updated(self: &Arc<Self>, user_id: UserId) -> Result<()> {
 576        if let Some(user) = self.app_state.db.get_user_by_id(user_id).await? {
 577            if let Some(invite_code) = &user.invite_code {
 578                let store = self.store().await;
 579                for connection_id in store.connection_ids_for_user(user_id) {
 580                    self.peer.send(
 581                        connection_id,
 582                        proto::UpdateInviteInfo {
 583                            url: format!("{}{}", self.app_state.invite_link_prefix, invite_code),
 584                            count: user.invite_count as u32,
 585                        },
 586                    )?;
 587                }
 588            }
 589        }
 590        Ok(())
 591    }
 592
 593    async fn ping(
 594        self: Arc<Server>,
 595        _: TypedEnvelope<proto::Ping>,
 596        response: Response<proto::Ping>,
 597    ) -> Result<()> {
 598        response.send(proto::Ack {})?;
 599        Ok(())
 600    }
 601
 602    async fn create_room(
 603        self: Arc<Server>,
 604        request: TypedEnvelope<proto::CreateRoom>,
 605        response: Response<proto::CreateRoom>,
 606    ) -> Result<()> {
 607        let user_id;
 608        let room;
 609        {
 610            let mut store = self.store().await;
 611            user_id = store.user_id_for_connection(request.sender_id)?;
 612            room = store.create_room(request.sender_id)?.clone();
 613        }
 614
 615        let live_kit_connection_info =
 616            if let Some(live_kit) = self.app_state.live_kit_client.as_ref() {
 617                if let Some(_) = live_kit
 618                    .create_room(room.live_kit_room.clone())
 619                    .await
 620                    .trace_err()
 621                {
 622                    if let Some(token) = live_kit
 623                        .room_token(&room.live_kit_room, &request.sender_id.to_string())
 624                        .trace_err()
 625                    {
 626                        Some(proto::LiveKitConnectionInfo {
 627                            server_url: live_kit.url().into(),
 628                            token,
 629                        })
 630                    } else {
 631                        None
 632                    }
 633                } else {
 634                    None
 635                }
 636            } else {
 637                None
 638            };
 639
 640        response.send(proto::CreateRoomResponse {
 641            room: Some(room),
 642            live_kit_connection_info,
 643        })?;
 644        self.update_user_contacts(user_id).await?;
 645        Ok(())
 646    }
 647
 648    async fn join_room(
 649        self: Arc<Server>,
 650        request: TypedEnvelope<proto::JoinRoom>,
 651        response: Response<proto::JoinRoom>,
 652    ) -> Result<()> {
 653        let user_id;
 654        {
 655            let mut store = self.store().await;
 656            user_id = store.user_id_for_connection(request.sender_id)?;
 657            let (room, recipient_connection_ids) =
 658                store.join_room(request.payload.id, request.sender_id)?;
 659            for recipient_id in recipient_connection_ids {
 660                self.peer
 661                    .send(recipient_id, proto::CallCanceled {})
 662                    .trace_err();
 663            }
 664
 665            let live_kit_connection_info =
 666                if let Some(live_kit) = self.app_state.live_kit_client.as_ref() {
 667                    if let Some(token) = live_kit
 668                        .room_token(&room.live_kit_room, &request.sender_id.to_string())
 669                        .trace_err()
 670                    {
 671                        Some(proto::LiveKitConnectionInfo {
 672                            server_url: live_kit.url().into(),
 673                            token,
 674                        })
 675                    } else {
 676                        None
 677                    }
 678                } else {
 679                    None
 680                };
 681
 682            response.send(proto::JoinRoomResponse {
 683                room: Some(room.clone()),
 684                live_kit_connection_info,
 685            })?;
 686            self.room_updated(room);
 687        }
 688        self.update_user_contacts(user_id).await?;
 689        Ok(())
 690    }
 691
 692    async fn leave_room(self: Arc<Server>, message: TypedEnvelope<proto::LeaveRoom>) -> Result<()> {
 693        let mut contacts_to_update = HashSet::default();
 694        let room_left;
 695        {
 696            let mut store = self.store().await;
 697            let user_id = store.user_id_for_connection(message.sender_id)?;
 698            let left_room = store.leave_room(message.payload.id, message.sender_id)?;
 699            contacts_to_update.insert(user_id);
 700
 701            for project in left_room.unshared_projects {
 702                for connection_id in project.connection_ids() {
 703                    self.peer.send(
 704                        connection_id,
 705                        proto::UnshareProject {
 706                            project_id: project.id.to_proto(),
 707                        },
 708                    )?;
 709                }
 710            }
 711
 712            for project in left_room.left_projects {
 713                if project.remove_collaborator {
 714                    for connection_id in project.connection_ids {
 715                        self.peer.send(
 716                            connection_id,
 717                            proto::RemoveProjectCollaborator {
 718                                project_id: project.id.to_proto(),
 719                                peer_id: message.sender_id.0,
 720                            },
 721                        )?;
 722                    }
 723
 724                    self.peer.send(
 725                        message.sender_id,
 726                        proto::UnshareProject {
 727                            project_id: project.id.to_proto(),
 728                        },
 729                    )?;
 730                }
 731            }
 732
 733            self.room_updated(&left_room.room);
 734            room_left = self.room_left(&left_room.room, message.sender_id);
 735
 736            for connection_id in left_room.canceled_call_connection_ids {
 737                self.peer
 738                    .send(connection_id, proto::CallCanceled {})
 739                    .trace_err();
 740                contacts_to_update.extend(store.user_id_for_connection(connection_id).ok());
 741            }
 742        }
 743
 744        room_left.await.trace_err();
 745        for user_id in contacts_to_update {
 746            self.update_user_contacts(user_id).await?;
 747        }
 748
 749        Ok(())
 750    }
 751
 752    async fn call(
 753        self: Arc<Server>,
 754        request: TypedEnvelope<proto::Call>,
 755        response: Response<proto::Call>,
 756    ) -> Result<()> {
 757        let caller_user_id = self
 758            .store()
 759            .await
 760            .user_id_for_connection(request.sender_id)?;
 761        let recipient_user_id = UserId::from_proto(request.payload.recipient_user_id);
 762        let initial_project_id = request
 763            .payload
 764            .initial_project_id
 765            .map(ProjectId::from_proto);
 766        if !self
 767            .app_state
 768            .db
 769            .has_contact(caller_user_id, recipient_user_id)
 770            .await?
 771        {
 772            return Err(anyhow!("cannot call a user who isn't a contact"))?;
 773        }
 774
 775        let room_id = request.payload.room_id;
 776        let mut calls = {
 777            let mut store = self.store().await;
 778            let (room, recipient_connection_ids, incoming_call) = store.call(
 779                room_id,
 780                recipient_user_id,
 781                initial_project_id,
 782                request.sender_id,
 783            )?;
 784            self.room_updated(room);
 785            recipient_connection_ids
 786                .into_iter()
 787                .map(|recipient_connection_id| {
 788                    self.peer
 789                        .request(recipient_connection_id, incoming_call.clone())
 790                })
 791                .collect::<FuturesUnordered<_>>()
 792        };
 793        self.update_user_contacts(recipient_user_id).await?;
 794
 795        while let Some(call_response) = calls.next().await {
 796            match call_response.as_ref() {
 797                Ok(_) => {
 798                    response.send(proto::Ack {})?;
 799                    return Ok(());
 800                }
 801                Err(_) => {
 802                    call_response.trace_err();
 803                }
 804            }
 805        }
 806
 807        {
 808            let mut store = self.store().await;
 809            let room = store.call_failed(room_id, recipient_user_id)?;
 810            self.room_updated(&room);
 811        }
 812        self.update_user_contacts(recipient_user_id).await?;
 813
 814        Err(anyhow!("failed to ring call recipient"))?
 815    }
 816
 817    async fn cancel_call(
 818        self: Arc<Server>,
 819        request: TypedEnvelope<proto::CancelCall>,
 820        response: Response<proto::CancelCall>,
 821    ) -> Result<()> {
 822        let recipient_user_id = UserId::from_proto(request.payload.recipient_user_id);
 823        {
 824            let mut store = self.store().await;
 825            let (room, recipient_connection_ids) = store.cancel_call(
 826                request.payload.room_id,
 827                recipient_user_id,
 828                request.sender_id,
 829            )?;
 830            for recipient_id in recipient_connection_ids {
 831                self.peer
 832                    .send(recipient_id, proto::CallCanceled {})
 833                    .trace_err();
 834            }
 835            self.room_updated(room);
 836            response.send(proto::Ack {})?;
 837        }
 838        self.update_user_contacts(recipient_user_id).await?;
 839        Ok(())
 840    }
 841
 842    async fn decline_call(
 843        self: Arc<Server>,
 844        message: TypedEnvelope<proto::DeclineCall>,
 845    ) -> Result<()> {
 846        let recipient_user_id;
 847        {
 848            let mut store = self.store().await;
 849            recipient_user_id = store.user_id_for_connection(message.sender_id)?;
 850            let (room, recipient_connection_ids) =
 851                store.decline_call(message.payload.room_id, message.sender_id)?;
 852            for recipient_id in recipient_connection_ids {
 853                self.peer
 854                    .send(recipient_id, proto::CallCanceled {})
 855                    .trace_err();
 856            }
 857            self.room_updated(room);
 858        }
 859        self.update_user_contacts(recipient_user_id).await?;
 860        Ok(())
 861    }
 862
 863    async fn update_participant_location(
 864        self: Arc<Server>,
 865        request: TypedEnvelope<proto::UpdateParticipantLocation>,
 866        response: Response<proto::UpdateParticipantLocation>,
 867    ) -> Result<()> {
 868        let room_id = request.payload.room_id;
 869        let location = request
 870            .payload
 871            .location
 872            .ok_or_else(|| anyhow!("invalid location"))?;
 873        let mut store = self.store().await;
 874        let room = store.update_participant_location(room_id, location, request.sender_id)?;
 875        self.room_updated(room);
 876        response.send(proto::Ack {})?;
 877        Ok(())
 878    }
 879
 880    fn room_updated(&self, room: &proto::Room) {
 881        for participant in &room.participants {
 882            self.peer
 883                .send(
 884                    ConnectionId(participant.peer_id),
 885                    proto::RoomUpdated {
 886                        room: Some(room.clone()),
 887                    },
 888                )
 889                .trace_err();
 890        }
 891    }
 892
 893    fn room_left(
 894        &self,
 895        room: &proto::Room,
 896        connection_id: ConnectionId,
 897    ) -> impl Future<Output = Result<()>> {
 898        let client = self.app_state.live_kit_client.clone();
 899        let room_name = room.live_kit_room.clone();
 900        let participant_count = room.participants.len();
 901        async move {
 902            if let Some(client) = client {
 903                client
 904                    .remove_participant(room_name.clone(), connection_id.to_string())
 905                    .await?;
 906
 907                if participant_count == 0 {
 908                    client.delete_room(room_name).await?;
 909                }
 910            }
 911
 912            Ok(())
 913        }
 914    }
 915
 916    async fn share_project(
 917        self: Arc<Server>,
 918        request: TypedEnvelope<proto::ShareProject>,
 919        response: Response<proto::ShareProject>,
 920    ) -> Result<()> {
 921        let user_id = self
 922            .store()
 923            .await
 924            .user_id_for_connection(request.sender_id)?;
 925        let project_id = self.app_state.db.register_project(user_id).await?;
 926        let mut store = self.store().await;
 927        let room = store.share_project(
 928            request.payload.room_id,
 929            project_id,
 930            request.payload.worktrees,
 931            request.sender_id,
 932        )?;
 933        response.send(proto::ShareProjectResponse {
 934            project_id: project_id.to_proto(),
 935        })?;
 936        self.room_updated(room);
 937
 938        Ok(())
 939    }
 940
 941    async fn unshare_project(
 942        self: Arc<Server>,
 943        message: TypedEnvelope<proto::UnshareProject>,
 944    ) -> Result<()> {
 945        let project_id = ProjectId::from_proto(message.payload.project_id);
 946        let mut store = self.store().await;
 947        let (room, project) = store.unshare_project(project_id, message.sender_id)?;
 948        broadcast(
 949            message.sender_id,
 950            project.guest_connection_ids(),
 951            |conn_id| self.peer.send(conn_id, message.payload.clone()),
 952        );
 953        self.room_updated(room);
 954
 955        Ok(())
 956    }
 957
 958    async fn update_user_contacts(self: &Arc<Server>, user_id: UserId) -> Result<()> {
 959        let contacts = self.app_state.db.get_contacts(user_id).await?;
 960        let store = self.store().await;
 961        let updated_contact = store.contact_for_user(user_id, false);
 962        for contact in contacts {
 963            if let db::Contact::Accepted {
 964                user_id: contact_user_id,
 965                ..
 966            } = contact
 967            {
 968                for contact_conn_id in store.connection_ids_for_user(contact_user_id) {
 969                    self.peer
 970                        .send(
 971                            contact_conn_id,
 972                            proto::UpdateContacts {
 973                                contacts: vec![updated_contact.clone()],
 974                                remove_contacts: Default::default(),
 975                                incoming_requests: Default::default(),
 976                                remove_incoming_requests: Default::default(),
 977                                outgoing_requests: Default::default(),
 978                                remove_outgoing_requests: Default::default(),
 979                            },
 980                        )
 981                        .trace_err();
 982                }
 983            }
 984        }
 985        Ok(())
 986    }
 987
 988    async fn join_project(
 989        self: Arc<Server>,
 990        request: TypedEnvelope<proto::JoinProject>,
 991        response: Response<proto::JoinProject>,
 992    ) -> Result<()> {
 993        let project_id = ProjectId::from_proto(request.payload.project_id);
 994
 995        let host_user_id;
 996        let guest_user_id;
 997        let host_connection_id;
 998        {
 999            let state = self.store().await;
1000            let project = state.project(project_id)?;
1001            host_user_id = project.host.user_id;
1002            host_connection_id = project.host_connection_id;
1003            guest_user_id = state.user_id_for_connection(request.sender_id)?;
1004        };
1005
1006        tracing::info!(%project_id, %host_user_id, %host_connection_id, "join project");
1007
1008        let mut store = self.store().await;
1009        let (project, replica_id) = store.join_project(request.sender_id, project_id)?;
1010        let peer_count = project.guests.len();
1011        let mut collaborators = Vec::with_capacity(peer_count);
1012        collaborators.push(proto::Collaborator {
1013            peer_id: project.host_connection_id.0,
1014            replica_id: 0,
1015            user_id: project.host.user_id.to_proto(),
1016        });
1017        let worktrees = project
1018            .worktrees
1019            .iter()
1020            .map(|(id, worktree)| proto::WorktreeMetadata {
1021                id: *id,
1022                root_name: worktree.root_name.clone(),
1023                visible: worktree.visible,
1024                abs_path: worktree.abs_path.as_os_str().as_bytes().to_vec(),
1025            })
1026            .collect::<Vec<_>>();
1027
1028        // Add all guests other than the requesting user's own connections as collaborators
1029        for (guest_conn_id, guest) in &project.guests {
1030            if request.sender_id != *guest_conn_id {
1031                collaborators.push(proto::Collaborator {
1032                    peer_id: guest_conn_id.0,
1033                    replica_id: guest.replica_id as u32,
1034                    user_id: guest.user_id.to_proto(),
1035                });
1036            }
1037        }
1038
1039        for conn_id in project.connection_ids() {
1040            if conn_id != request.sender_id {
1041                self.peer.send(
1042                    conn_id,
1043                    proto::AddProjectCollaborator {
1044                        project_id: project_id.to_proto(),
1045                        collaborator: Some(proto::Collaborator {
1046                            peer_id: request.sender_id.0,
1047                            replica_id: replica_id as u32,
1048                            user_id: guest_user_id.to_proto(),
1049                        }),
1050                    },
1051                )?;
1052            }
1053        }
1054
1055        // First, we send the metadata associated with each worktree.
1056        response.send(proto::JoinProjectResponse {
1057            worktrees: worktrees.clone(),
1058            replica_id: replica_id as u32,
1059            collaborators: collaborators.clone(),
1060            language_servers: project.language_servers.clone(),
1061        })?;
1062
1063        for (worktree_id, worktree) in &project.worktrees {
1064            #[cfg(any(test, feature = "test-support"))]
1065            const MAX_CHUNK_SIZE: usize = 2;
1066            #[cfg(not(any(test, feature = "test-support")))]
1067            const MAX_CHUNK_SIZE: usize = 256;
1068
1069            // Stream this worktree's entries.
1070            let message = proto::UpdateWorktree {
1071                project_id: project_id.to_proto(),
1072                worktree_id: *worktree_id,
1073                abs_path: worktree.abs_path.as_os_str().as_bytes().to_vec(),
1074                root_name: worktree.root_name.clone(),
1075                updated_entries: worktree.entries.values().cloned().collect(),
1076                removed_entries: Default::default(),
1077                scan_id: worktree.scan_id,
1078                is_last_update: worktree.is_complete,
1079            };
1080            for update in proto::split_worktree_update(message, MAX_CHUNK_SIZE) {
1081                self.peer.send(request.sender_id, update.clone())?;
1082            }
1083
1084            // Stream this worktree's diagnostics.
1085            for summary in worktree.diagnostic_summaries.values() {
1086                self.peer.send(
1087                    request.sender_id,
1088                    proto::UpdateDiagnosticSummary {
1089                        project_id: project_id.to_proto(),
1090                        worktree_id: *worktree_id,
1091                        summary: Some(summary.clone()),
1092                    },
1093                )?;
1094            }
1095        }
1096
1097        for language_server in &project.language_servers {
1098            self.peer.send(
1099                request.sender_id,
1100                proto::UpdateLanguageServer {
1101                    project_id: project_id.to_proto(),
1102                    language_server_id: language_server.id,
1103                    variant: Some(
1104                        proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
1105                            proto::LspDiskBasedDiagnosticsUpdated {},
1106                        ),
1107                    ),
1108                },
1109            )?;
1110        }
1111
1112        Ok(())
1113    }
1114
1115    async fn leave_project(
1116        self: Arc<Server>,
1117        request: TypedEnvelope<proto::LeaveProject>,
1118    ) -> Result<()> {
1119        let sender_id = request.sender_id;
1120        let project_id = ProjectId::from_proto(request.payload.project_id);
1121        let project;
1122        {
1123            let mut store = self.store().await;
1124            project = store.leave_project(project_id, sender_id)?;
1125            tracing::info!(
1126                %project_id,
1127                host_user_id = %project.host_user_id,
1128                host_connection_id = %project.host_connection_id,
1129                "leave project"
1130            );
1131
1132            if project.remove_collaborator {
1133                broadcast(sender_id, project.connection_ids, |conn_id| {
1134                    self.peer.send(
1135                        conn_id,
1136                        proto::RemoveProjectCollaborator {
1137                            project_id: project_id.to_proto(),
1138                            peer_id: sender_id.0,
1139                        },
1140                    )
1141                });
1142            }
1143        }
1144
1145        Ok(())
1146    }
1147
1148    async fn update_project(
1149        self: Arc<Server>,
1150        request: TypedEnvelope<proto::UpdateProject>,
1151    ) -> Result<()> {
1152        let project_id = ProjectId::from_proto(request.payload.project_id);
1153        {
1154            let mut state = self.store().await;
1155            let guest_connection_ids = state
1156                .read_project(project_id, request.sender_id)?
1157                .guest_connection_ids();
1158            let room =
1159                state.update_project(project_id, &request.payload.worktrees, request.sender_id)?;
1160            broadcast(request.sender_id, guest_connection_ids, |connection_id| {
1161                self.peer
1162                    .forward_send(request.sender_id, connection_id, request.payload.clone())
1163            });
1164            self.room_updated(room);
1165        };
1166
1167        Ok(())
1168    }
1169
1170    async fn register_project_activity(
1171        self: Arc<Server>,
1172        request: TypedEnvelope<proto::RegisterProjectActivity>,
1173    ) -> Result<()> {
1174        self.store().await.register_project_activity(
1175            ProjectId::from_proto(request.payload.project_id),
1176            request.sender_id,
1177        )?;
1178        Ok(())
1179    }
1180
1181    async fn update_worktree(
1182        self: Arc<Server>,
1183        request: TypedEnvelope<proto::UpdateWorktree>,
1184        response: Response<proto::UpdateWorktree>,
1185    ) -> Result<()> {
1186        let project_id = ProjectId::from_proto(request.payload.project_id);
1187        let worktree_id = request.payload.worktree_id;
1188        let connection_ids = self.store().await.update_worktree(
1189            request.sender_id,
1190            project_id,
1191            worktree_id,
1192            &request.payload.root_name,
1193            &request.payload.removed_entries,
1194            &request.payload.updated_entries,
1195            request.payload.scan_id,
1196            request.payload.is_last_update,
1197        )?;
1198
1199        broadcast(request.sender_id, connection_ids, |connection_id| {
1200            self.peer
1201                .forward_send(request.sender_id, connection_id, request.payload.clone())
1202        });
1203        response.send(proto::Ack {})?;
1204        Ok(())
1205    }
1206
1207    async fn update_worktree_extensions(
1208        self: Arc<Server>,
1209        request: TypedEnvelope<proto::UpdateWorktreeExtensions>,
1210    ) -> Result<()> {
1211        let project_id = ProjectId::from_proto(request.payload.project_id);
1212        let worktree_id = request.payload.worktree_id;
1213        let extensions = request
1214            .payload
1215            .extensions
1216            .into_iter()
1217            .zip(request.payload.counts)
1218            .collect();
1219        self.app_state
1220            .db
1221            .update_worktree_extensions(project_id, worktree_id, extensions)
1222            .await?;
1223        Ok(())
1224    }
1225
1226    async fn update_diagnostic_summary(
1227        self: Arc<Server>,
1228        request: TypedEnvelope<proto::UpdateDiagnosticSummary>,
1229    ) -> Result<()> {
1230        let summary = request
1231            .payload
1232            .summary
1233            .clone()
1234            .ok_or_else(|| anyhow!("invalid summary"))?;
1235        let receiver_ids = self.store().await.update_diagnostic_summary(
1236            ProjectId::from_proto(request.payload.project_id),
1237            request.payload.worktree_id,
1238            request.sender_id,
1239            summary,
1240        )?;
1241
1242        broadcast(request.sender_id, receiver_ids, |connection_id| {
1243            self.peer
1244                .forward_send(request.sender_id, connection_id, request.payload.clone())
1245        });
1246        Ok(())
1247    }
1248
1249    async fn start_language_server(
1250        self: Arc<Server>,
1251        request: TypedEnvelope<proto::StartLanguageServer>,
1252    ) -> Result<()> {
1253        let receiver_ids = self.store().await.start_language_server(
1254            ProjectId::from_proto(request.payload.project_id),
1255            request.sender_id,
1256            request
1257                .payload
1258                .server
1259                .clone()
1260                .ok_or_else(|| anyhow!("invalid language server"))?,
1261        )?;
1262        broadcast(request.sender_id, receiver_ids, |connection_id| {
1263            self.peer
1264                .forward_send(request.sender_id, connection_id, request.payload.clone())
1265        });
1266        Ok(())
1267    }
1268
1269    async fn update_language_server(
1270        self: Arc<Server>,
1271        request: TypedEnvelope<proto::UpdateLanguageServer>,
1272    ) -> Result<()> {
1273        let receiver_ids = self.store().await.project_connection_ids(
1274            ProjectId::from_proto(request.payload.project_id),
1275            request.sender_id,
1276        )?;
1277        broadcast(request.sender_id, receiver_ids, |connection_id| {
1278            self.peer
1279                .forward_send(request.sender_id, connection_id, request.payload.clone())
1280        });
1281        Ok(())
1282    }
1283
1284    async fn forward_project_request<T>(
1285        self: Arc<Server>,
1286        request: TypedEnvelope<T>,
1287        response: Response<T>,
1288    ) -> Result<()>
1289    where
1290        T: EntityMessage + RequestMessage,
1291    {
1292        let project_id = ProjectId::from_proto(request.payload.remote_entity_id());
1293        let host_connection_id = self
1294            .store()
1295            .await
1296            .read_project(project_id, request.sender_id)?
1297            .host_connection_id;
1298        let payload = self
1299            .peer
1300            .forward_request(request.sender_id, host_connection_id, request.payload)
1301            .await?;
1302
1303        // Ensure project still exists by the time we get the response from the host.
1304        self.store()
1305            .await
1306            .read_project(project_id, request.sender_id)?;
1307
1308        response.send(payload)?;
1309        Ok(())
1310    }
1311
1312    async fn save_buffer(
1313        self: Arc<Server>,
1314        request: TypedEnvelope<proto::SaveBuffer>,
1315        response: Response<proto::SaveBuffer>,
1316    ) -> Result<()> {
1317        let project_id = ProjectId::from_proto(request.payload.project_id);
1318        let host = self
1319            .store()
1320            .await
1321            .read_project(project_id, request.sender_id)?
1322            .host_connection_id;
1323        let response_payload = self
1324            .peer
1325            .forward_request(request.sender_id, host, request.payload.clone())
1326            .await?;
1327
1328        let mut guests = self
1329            .store()
1330            .await
1331            .read_project(project_id, request.sender_id)?
1332            .connection_ids();
1333        guests.retain(|guest_connection_id| *guest_connection_id != request.sender_id);
1334        broadcast(host, guests, |conn_id| {
1335            self.peer
1336                .forward_send(host, conn_id, response_payload.clone())
1337        });
1338        response.send(response_payload)?;
1339        Ok(())
1340    }
1341
1342    async fn create_buffer_for_peer(
1343        self: Arc<Server>,
1344        request: TypedEnvelope<proto::CreateBufferForPeer>,
1345    ) -> Result<()> {
1346        self.peer.forward_send(
1347            request.sender_id,
1348            ConnectionId(request.payload.peer_id),
1349            request.payload,
1350        )?;
1351        Ok(())
1352    }
1353
1354    async fn update_buffer(
1355        self: Arc<Server>,
1356        request: TypedEnvelope<proto::UpdateBuffer>,
1357        response: Response<proto::UpdateBuffer>,
1358    ) -> Result<()> {
1359        let project_id = ProjectId::from_proto(request.payload.project_id);
1360        let receiver_ids = {
1361            let mut store = self.store().await;
1362            store.register_project_activity(project_id, request.sender_id)?;
1363            store.project_connection_ids(project_id, request.sender_id)?
1364        };
1365
1366        broadcast(request.sender_id, receiver_ids, |connection_id| {
1367            self.peer
1368                .forward_send(request.sender_id, connection_id, request.payload.clone())
1369        });
1370        response.send(proto::Ack {})?;
1371        Ok(())
1372    }
1373
1374    async fn update_buffer_file(
1375        self: Arc<Server>,
1376        request: TypedEnvelope<proto::UpdateBufferFile>,
1377    ) -> Result<()> {
1378        let receiver_ids = self.store().await.project_connection_ids(
1379            ProjectId::from_proto(request.payload.project_id),
1380            request.sender_id,
1381        )?;
1382        broadcast(request.sender_id, receiver_ids, |connection_id| {
1383            self.peer
1384                .forward_send(request.sender_id, connection_id, request.payload.clone())
1385        });
1386        Ok(())
1387    }
1388
1389    async fn buffer_reloaded(
1390        self: Arc<Server>,
1391        request: TypedEnvelope<proto::BufferReloaded>,
1392    ) -> Result<()> {
1393        let receiver_ids = self.store().await.project_connection_ids(
1394            ProjectId::from_proto(request.payload.project_id),
1395            request.sender_id,
1396        )?;
1397        broadcast(request.sender_id, receiver_ids, |connection_id| {
1398            self.peer
1399                .forward_send(request.sender_id, connection_id, request.payload.clone())
1400        });
1401        Ok(())
1402    }
1403
1404    async fn buffer_saved(
1405        self: Arc<Server>,
1406        request: TypedEnvelope<proto::BufferSaved>,
1407    ) -> Result<()> {
1408        let receiver_ids = self.store().await.project_connection_ids(
1409            ProjectId::from_proto(request.payload.project_id),
1410            request.sender_id,
1411        )?;
1412        broadcast(request.sender_id, receiver_ids, |connection_id| {
1413            self.peer
1414                .forward_send(request.sender_id, connection_id, request.payload.clone())
1415        });
1416        Ok(())
1417    }
1418
1419    async fn follow(
1420        self: Arc<Self>,
1421        request: TypedEnvelope<proto::Follow>,
1422        response: Response<proto::Follow>,
1423    ) -> Result<()> {
1424        let project_id = ProjectId::from_proto(request.payload.project_id);
1425        let leader_id = ConnectionId(request.payload.leader_id);
1426        let follower_id = request.sender_id;
1427        {
1428            let mut store = self.store().await;
1429            if !store
1430                .project_connection_ids(project_id, follower_id)?
1431                .contains(&leader_id)
1432            {
1433                Err(anyhow!("no such peer"))?;
1434            }
1435
1436            store.register_project_activity(project_id, follower_id)?;
1437        }
1438
1439        let mut response_payload = self
1440            .peer
1441            .forward_request(request.sender_id, leader_id, request.payload)
1442            .await?;
1443        response_payload
1444            .views
1445            .retain(|view| view.leader_id != Some(follower_id.0));
1446        response.send(response_payload)?;
1447        Ok(())
1448    }
1449
1450    async fn unfollow(self: Arc<Self>, request: TypedEnvelope<proto::Unfollow>) -> Result<()> {
1451        let project_id = ProjectId::from_proto(request.payload.project_id);
1452        let leader_id = ConnectionId(request.payload.leader_id);
1453        let mut store = self.store().await;
1454        if !store
1455            .project_connection_ids(project_id, request.sender_id)?
1456            .contains(&leader_id)
1457        {
1458            Err(anyhow!("no such peer"))?;
1459        }
1460        store.register_project_activity(project_id, request.sender_id)?;
1461        self.peer
1462            .forward_send(request.sender_id, leader_id, request.payload)?;
1463        Ok(())
1464    }
1465
1466    async fn update_followers(
1467        self: Arc<Self>,
1468        request: TypedEnvelope<proto::UpdateFollowers>,
1469    ) -> Result<()> {
1470        let project_id = ProjectId::from_proto(request.payload.project_id);
1471        let mut store = self.store().await;
1472        store.register_project_activity(project_id, request.sender_id)?;
1473        let connection_ids = store.project_connection_ids(project_id, request.sender_id)?;
1474        let leader_id = request
1475            .payload
1476            .variant
1477            .as_ref()
1478            .and_then(|variant| match variant {
1479                proto::update_followers::Variant::CreateView(payload) => payload.leader_id,
1480                proto::update_followers::Variant::UpdateView(payload) => payload.leader_id,
1481                proto::update_followers::Variant::UpdateActiveView(payload) => payload.leader_id,
1482            });
1483        for follower_id in &request.payload.follower_ids {
1484            let follower_id = ConnectionId(*follower_id);
1485            if connection_ids.contains(&follower_id) && Some(follower_id.0) != leader_id {
1486                self.peer
1487                    .forward_send(request.sender_id, follower_id, request.payload.clone())?;
1488            }
1489        }
1490        Ok(())
1491    }
1492
1493    async fn get_channels(
1494        self: Arc<Server>,
1495        request: TypedEnvelope<proto::GetChannels>,
1496        response: Response<proto::GetChannels>,
1497    ) -> Result<()> {
1498        let user_id = self
1499            .store()
1500            .await
1501            .user_id_for_connection(request.sender_id)?;
1502        let channels = self.app_state.db.get_accessible_channels(user_id).await?;
1503        response.send(proto::GetChannelsResponse {
1504            channels: channels
1505                .into_iter()
1506                .map(|chan| proto::Channel {
1507                    id: chan.id.to_proto(),
1508                    name: chan.name,
1509                })
1510                .collect(),
1511        })?;
1512        Ok(())
1513    }
1514
1515    async fn get_users(
1516        self: Arc<Server>,
1517        request: TypedEnvelope<proto::GetUsers>,
1518        response: Response<proto::GetUsers>,
1519    ) -> Result<()> {
1520        let user_ids = request
1521            .payload
1522            .user_ids
1523            .into_iter()
1524            .map(UserId::from_proto)
1525            .collect();
1526        let users = self
1527            .app_state
1528            .db
1529            .get_users_by_ids(user_ids)
1530            .await?
1531            .into_iter()
1532            .map(|user| proto::User {
1533                id: user.id.to_proto(),
1534                avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
1535                github_login: user.github_login,
1536            })
1537            .collect();
1538        response.send(proto::UsersResponse { users })?;
1539        Ok(())
1540    }
1541
1542    async fn fuzzy_search_users(
1543        self: Arc<Server>,
1544        request: TypedEnvelope<proto::FuzzySearchUsers>,
1545        response: Response<proto::FuzzySearchUsers>,
1546    ) -> Result<()> {
1547        let user_id = self
1548            .store()
1549            .await
1550            .user_id_for_connection(request.sender_id)?;
1551        let query = request.payload.query;
1552        let db = &self.app_state.db;
1553        let users = match query.len() {
1554            0 => vec![],
1555            1 | 2 => db
1556                .get_user_by_github_account(&query, None)
1557                .await?
1558                .into_iter()
1559                .collect(),
1560            _ => db.fuzzy_search_users(&query, 10).await?,
1561        };
1562        let users = users
1563            .into_iter()
1564            .filter(|user| user.id != user_id)
1565            .map(|user| proto::User {
1566                id: user.id.to_proto(),
1567                avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
1568                github_login: user.github_login,
1569            })
1570            .collect();
1571        response.send(proto::UsersResponse { users })?;
1572        Ok(())
1573    }
1574
1575    async fn request_contact(
1576        self: Arc<Server>,
1577        request: TypedEnvelope<proto::RequestContact>,
1578        response: Response<proto::RequestContact>,
1579    ) -> Result<()> {
1580        let requester_id = self
1581            .store()
1582            .await
1583            .user_id_for_connection(request.sender_id)?;
1584        let responder_id = UserId::from_proto(request.payload.responder_id);
1585        if requester_id == responder_id {
1586            return Err(anyhow!("cannot add yourself as a contact"))?;
1587        }
1588
1589        self.app_state
1590            .db
1591            .send_contact_request(requester_id, responder_id)
1592            .await?;
1593
1594        // Update outgoing contact requests of requester
1595        let mut update = proto::UpdateContacts::default();
1596        update.outgoing_requests.push(responder_id.to_proto());
1597        for connection_id in self.store().await.connection_ids_for_user(requester_id) {
1598            self.peer.send(connection_id, update.clone())?;
1599        }
1600
1601        // Update incoming contact requests of responder
1602        let mut update = proto::UpdateContacts::default();
1603        update
1604            .incoming_requests
1605            .push(proto::IncomingContactRequest {
1606                requester_id: requester_id.to_proto(),
1607                should_notify: true,
1608            });
1609        for connection_id in self.store().await.connection_ids_for_user(responder_id) {
1610            self.peer.send(connection_id, update.clone())?;
1611        }
1612
1613        response.send(proto::Ack {})?;
1614        Ok(())
1615    }
1616
1617    async fn respond_to_contact_request(
1618        self: Arc<Server>,
1619        request: TypedEnvelope<proto::RespondToContactRequest>,
1620        response: Response<proto::RespondToContactRequest>,
1621    ) -> Result<()> {
1622        let responder_id = self
1623            .store()
1624            .await
1625            .user_id_for_connection(request.sender_id)?;
1626        let requester_id = UserId::from_proto(request.payload.requester_id);
1627        if request.payload.response == proto::ContactRequestResponse::Dismiss as i32 {
1628            self.app_state
1629                .db
1630                .dismiss_contact_notification(responder_id, requester_id)
1631                .await?;
1632        } else {
1633            let accept = request.payload.response == proto::ContactRequestResponse::Accept as i32;
1634            self.app_state
1635                .db
1636                .respond_to_contact_request(responder_id, requester_id, accept)
1637                .await?;
1638
1639            let store = self.store().await;
1640            // Update responder with new contact
1641            let mut update = proto::UpdateContacts::default();
1642            if accept {
1643                update
1644                    .contacts
1645                    .push(store.contact_for_user(requester_id, false));
1646            }
1647            update
1648                .remove_incoming_requests
1649                .push(requester_id.to_proto());
1650            for connection_id in store.connection_ids_for_user(responder_id) {
1651                self.peer.send(connection_id, update.clone())?;
1652            }
1653
1654            // Update requester with new contact
1655            let mut update = proto::UpdateContacts::default();
1656            if accept {
1657                update
1658                    .contacts
1659                    .push(store.contact_for_user(responder_id, true));
1660            }
1661            update
1662                .remove_outgoing_requests
1663                .push(responder_id.to_proto());
1664            for connection_id in store.connection_ids_for_user(requester_id) {
1665                self.peer.send(connection_id, update.clone())?;
1666            }
1667        }
1668
1669        response.send(proto::Ack {})?;
1670        Ok(())
1671    }
1672
1673    async fn remove_contact(
1674        self: Arc<Server>,
1675        request: TypedEnvelope<proto::RemoveContact>,
1676        response: Response<proto::RemoveContact>,
1677    ) -> Result<()> {
1678        let requester_id = self
1679            .store()
1680            .await
1681            .user_id_for_connection(request.sender_id)?;
1682        let responder_id = UserId::from_proto(request.payload.user_id);
1683        self.app_state
1684            .db
1685            .remove_contact(requester_id, responder_id)
1686            .await?;
1687
1688        // Update outgoing contact requests of requester
1689        let mut update = proto::UpdateContacts::default();
1690        update
1691            .remove_outgoing_requests
1692            .push(responder_id.to_proto());
1693        for connection_id in self.store().await.connection_ids_for_user(requester_id) {
1694            self.peer.send(connection_id, update.clone())?;
1695        }
1696
1697        // Update incoming contact requests of responder
1698        let mut update = proto::UpdateContacts::default();
1699        update
1700            .remove_incoming_requests
1701            .push(requester_id.to_proto());
1702        for connection_id in self.store().await.connection_ids_for_user(responder_id) {
1703            self.peer.send(connection_id, update.clone())?;
1704        }
1705
1706        response.send(proto::Ack {})?;
1707        Ok(())
1708    }
1709
1710    async fn join_channel(
1711        self: Arc<Self>,
1712        request: TypedEnvelope<proto::JoinChannel>,
1713        response: Response<proto::JoinChannel>,
1714    ) -> Result<()> {
1715        let user_id = self
1716            .store()
1717            .await
1718            .user_id_for_connection(request.sender_id)?;
1719        let channel_id = ChannelId::from_proto(request.payload.channel_id);
1720        if !self
1721            .app_state
1722            .db
1723            .can_user_access_channel(user_id, channel_id)
1724            .await?
1725        {
1726            Err(anyhow!("access denied"))?;
1727        }
1728
1729        self.store()
1730            .await
1731            .join_channel(request.sender_id, channel_id);
1732        let messages = self
1733            .app_state
1734            .db
1735            .get_channel_messages(channel_id, MESSAGE_COUNT_PER_PAGE, None)
1736            .await?
1737            .into_iter()
1738            .map(|msg| proto::ChannelMessage {
1739                id: msg.id.to_proto(),
1740                body: msg.body,
1741                timestamp: msg.sent_at.unix_timestamp() as u64,
1742                sender_id: msg.sender_id.to_proto(),
1743                nonce: Some(msg.nonce.as_u128().into()),
1744            })
1745            .collect::<Vec<_>>();
1746        response.send(proto::JoinChannelResponse {
1747            done: messages.len() < MESSAGE_COUNT_PER_PAGE,
1748            messages,
1749        })?;
1750        Ok(())
1751    }
1752
1753    async fn leave_channel(
1754        self: Arc<Self>,
1755        request: TypedEnvelope<proto::LeaveChannel>,
1756    ) -> Result<()> {
1757        let user_id = self
1758            .store()
1759            .await
1760            .user_id_for_connection(request.sender_id)?;
1761        let channel_id = ChannelId::from_proto(request.payload.channel_id);
1762        if !self
1763            .app_state
1764            .db
1765            .can_user_access_channel(user_id, channel_id)
1766            .await?
1767        {
1768            Err(anyhow!("access denied"))?;
1769        }
1770
1771        self.store()
1772            .await
1773            .leave_channel(request.sender_id, channel_id);
1774
1775        Ok(())
1776    }
1777
1778    async fn send_channel_message(
1779        self: Arc<Self>,
1780        request: TypedEnvelope<proto::SendChannelMessage>,
1781        response: Response<proto::SendChannelMessage>,
1782    ) -> Result<()> {
1783        let channel_id = ChannelId::from_proto(request.payload.channel_id);
1784        let user_id;
1785        let connection_ids;
1786        {
1787            let state = self.store().await;
1788            user_id = state.user_id_for_connection(request.sender_id)?;
1789            connection_ids = state.channel_connection_ids(channel_id)?;
1790        }
1791
1792        // Validate the message body.
1793        let body = request.payload.body.trim().to_string();
1794        if body.len() > MAX_MESSAGE_LEN {
1795            return Err(anyhow!("message is too long"))?;
1796        }
1797        if body.is_empty() {
1798            return Err(anyhow!("message can't be blank"))?;
1799        }
1800
1801        let timestamp = OffsetDateTime::now_utc();
1802        let nonce = request
1803            .payload
1804            .nonce
1805            .ok_or_else(|| anyhow!("nonce can't be blank"))?;
1806
1807        let message_id = self
1808            .app_state
1809            .db
1810            .create_channel_message(channel_id, user_id, &body, timestamp, nonce.clone().into())
1811            .await?
1812            .to_proto();
1813        let message = proto::ChannelMessage {
1814            sender_id: user_id.to_proto(),
1815            id: message_id,
1816            body,
1817            timestamp: timestamp.unix_timestamp() as u64,
1818            nonce: Some(nonce),
1819        };
1820        broadcast(request.sender_id, connection_ids, |conn_id| {
1821            self.peer.send(
1822                conn_id,
1823                proto::ChannelMessageSent {
1824                    channel_id: channel_id.to_proto(),
1825                    message: Some(message.clone()),
1826                },
1827            )
1828        });
1829        response.send(proto::SendChannelMessageResponse {
1830            message: Some(message),
1831        })?;
1832        Ok(())
1833    }
1834
1835    async fn get_channel_messages(
1836        self: Arc<Self>,
1837        request: TypedEnvelope<proto::GetChannelMessages>,
1838        response: Response<proto::GetChannelMessages>,
1839    ) -> Result<()> {
1840        let user_id = self
1841            .store()
1842            .await
1843            .user_id_for_connection(request.sender_id)?;
1844        let channel_id = ChannelId::from_proto(request.payload.channel_id);
1845        if !self
1846            .app_state
1847            .db
1848            .can_user_access_channel(user_id, channel_id)
1849            .await?
1850        {
1851            Err(anyhow!("access denied"))?;
1852        }
1853
1854        let messages = self
1855            .app_state
1856            .db
1857            .get_channel_messages(
1858                channel_id,
1859                MESSAGE_COUNT_PER_PAGE,
1860                Some(MessageId::from_proto(request.payload.before_message_id)),
1861            )
1862            .await?
1863            .into_iter()
1864            .map(|msg| proto::ChannelMessage {
1865                id: msg.id.to_proto(),
1866                body: msg.body,
1867                timestamp: msg.sent_at.unix_timestamp() as u64,
1868                sender_id: msg.sender_id.to_proto(),
1869                nonce: Some(msg.nonce.as_u128().into()),
1870            })
1871            .collect::<Vec<_>>();
1872        response.send(proto::GetChannelMessagesResponse {
1873            done: messages.len() < MESSAGE_COUNT_PER_PAGE,
1874            messages,
1875        })?;
1876        Ok(())
1877    }
1878
1879    async fn update_diff_base(
1880        self: Arc<Server>,
1881        request: TypedEnvelope<proto::UpdateDiffBase>,
1882    ) -> Result<()> {
1883        let receiver_ids = self.store().await.project_connection_ids(
1884            ProjectId::from_proto(request.payload.project_id),
1885            request.sender_id,
1886        )?;
1887        broadcast(request.sender_id, receiver_ids, |connection_id| {
1888            self.peer
1889                .forward_send(request.sender_id, connection_id, request.payload.clone())
1890        });
1891        Ok(())
1892    }
1893
1894    async fn get_private_user_info(
1895        self: Arc<Self>,
1896        request: TypedEnvelope<proto::GetPrivateUserInfo>,
1897        response: Response<proto::GetPrivateUserInfo>,
1898    ) -> Result<()> {
1899        let user_id = self
1900            .store()
1901            .await
1902            .user_id_for_connection(request.sender_id)?;
1903        let metrics_id = self.app_state.db.get_user_metrics_id(user_id).await?;
1904        let user = self
1905            .app_state
1906            .db
1907            .get_user_by_id(user_id)
1908            .await?
1909            .ok_or_else(|| anyhow!("user not found"))?;
1910        response.send(proto::GetPrivateUserInfoResponse {
1911            metrics_id,
1912            staff: user.admin,
1913        })?;
1914        Ok(())
1915    }
1916
1917    pub(crate) async fn store(&self) -> StoreGuard<'_> {
1918        #[cfg(test)]
1919        tokio::task::yield_now().await;
1920        let guard = self.store.lock().await;
1921        #[cfg(test)]
1922        tokio::task::yield_now().await;
1923        StoreGuard {
1924            guard,
1925            _not_send: PhantomData,
1926        }
1927    }
1928
1929    pub async fn snapshot<'a>(self: &'a Arc<Self>) -> ServerSnapshot<'a> {
1930        ServerSnapshot {
1931            store: self.store().await,
1932            peer: &self.peer,
1933        }
1934    }
1935}
1936
1937impl<'a> Deref for StoreGuard<'a> {
1938    type Target = Store;
1939
1940    fn deref(&self) -> &Self::Target {
1941        &*self.guard
1942    }
1943}
1944
1945impl<'a> DerefMut for StoreGuard<'a> {
1946    fn deref_mut(&mut self) -> &mut Self::Target {
1947        &mut *self.guard
1948    }
1949}
1950
1951impl<'a> Drop for StoreGuard<'a> {
1952    fn drop(&mut self) {
1953        #[cfg(test)]
1954        self.check_invariants();
1955    }
1956}
1957
1958impl Executor for RealExecutor {
1959    type Sleep = Sleep;
1960
1961    fn spawn_detached<F: 'static + Send + Future<Output = ()>>(&self, future: F) {
1962        tokio::task::spawn(future);
1963    }
1964
1965    fn sleep(&self, duration: Duration) -> Self::Sleep {
1966        tokio::time::sleep(duration)
1967    }
1968}
1969
1970fn broadcast<F>(
1971    sender_id: ConnectionId,
1972    receiver_ids: impl IntoIterator<Item = ConnectionId>,
1973    mut f: F,
1974) where
1975    F: FnMut(ConnectionId) -> anyhow::Result<()>,
1976{
1977    for receiver_id in receiver_ids {
1978        if receiver_id != sender_id {
1979            f(receiver_id).trace_err();
1980        }
1981    }
1982}
1983
1984lazy_static! {
1985    static ref ZED_PROTOCOL_VERSION: HeaderName = HeaderName::from_static("x-zed-protocol-version");
1986}
1987
1988pub struct ProtocolVersion(u32);
1989
1990impl Header for ProtocolVersion {
1991    fn name() -> &'static HeaderName {
1992        &ZED_PROTOCOL_VERSION
1993    }
1994
1995    fn decode<'i, I>(values: &mut I) -> Result<Self, axum::headers::Error>
1996    where
1997        Self: Sized,
1998        I: Iterator<Item = &'i axum::http::HeaderValue>,
1999    {
2000        let version = values
2001            .next()
2002            .ok_or_else(axum::headers::Error::invalid)?
2003            .to_str()
2004            .map_err(|_| axum::headers::Error::invalid())?
2005            .parse()
2006            .map_err(|_| axum::headers::Error::invalid())?;
2007        Ok(Self(version))
2008    }
2009
2010    fn encode<E: Extend<axum::http::HeaderValue>>(&self, values: &mut E) {
2011        values.extend([self.0.to_string().parse().unwrap()]);
2012    }
2013}
2014
2015pub fn routes(server: Arc<Server>) -> Router<Body> {
2016    Router::new()
2017        .route("/rpc", get(handle_websocket_request))
2018        .layer(
2019            ServiceBuilder::new()
2020                .layer(Extension(server.app_state.clone()))
2021                .layer(middleware::from_fn(auth::validate_header)),
2022        )
2023        .route("/metrics", get(handle_metrics))
2024        .layer(Extension(server))
2025}
2026
2027pub async fn handle_websocket_request(
2028    TypedHeader(ProtocolVersion(protocol_version)): TypedHeader<ProtocolVersion>,
2029    ConnectInfo(socket_address): ConnectInfo<SocketAddr>,
2030    Extension(server): Extension<Arc<Server>>,
2031    Extension(user): Extension<User>,
2032    ws: WebSocketUpgrade,
2033) -> axum::response::Response {
2034    if protocol_version != rpc::PROTOCOL_VERSION {
2035        return (
2036            StatusCode::UPGRADE_REQUIRED,
2037            "client must be upgraded".to_string(),
2038        )
2039            .into_response();
2040    }
2041    let socket_address = socket_address.to_string();
2042    ws.on_upgrade(move |socket| {
2043        use util::ResultExt;
2044        let socket = socket
2045            .map_ok(to_tungstenite_message)
2046            .err_into()
2047            .with(|message| async move { Ok(to_axum_message(message)) });
2048        let connection = Connection::new(Box::pin(socket));
2049        async move {
2050            server
2051                .handle_connection(connection, socket_address, user, None, RealExecutor)
2052                .await
2053                .log_err();
2054        }
2055    })
2056}
2057
2058pub async fn handle_metrics(Extension(server): Extension<Arc<Server>>) -> axum::response::Response {
2059    // We call `store_mut` here for its side effects of updating metrics.
2060    let metrics = server.store().await.metrics();
2061    METRIC_CONNECTIONS.set(metrics.connections as _);
2062    METRIC_REGISTERED_PROJECTS.set(metrics.registered_projects as _);
2063    METRIC_ACTIVE_PROJECTS.set(metrics.active_projects as _);
2064    METRIC_SHARED_PROJECTS.set(metrics.shared_projects as _);
2065
2066    let encoder = prometheus::TextEncoder::new();
2067    let metric_families = prometheus::gather();
2068    match encoder.encode_to_string(&metric_families) {
2069        Ok(string) => (StatusCode::OK, string).into_response(),
2070        Err(error) => (
2071            StatusCode::INTERNAL_SERVER_ERROR,
2072            format!("failed to encode metrics {:?}", error),
2073        )
2074            .into_response(),
2075    }
2076}
2077
2078fn to_axum_message(message: TungsteniteMessage) -> AxumMessage {
2079    match message {
2080        TungsteniteMessage::Text(payload) => AxumMessage::Text(payload),
2081        TungsteniteMessage::Binary(payload) => AxumMessage::Binary(payload),
2082        TungsteniteMessage::Ping(payload) => AxumMessage::Ping(payload),
2083        TungsteniteMessage::Pong(payload) => AxumMessage::Pong(payload),
2084        TungsteniteMessage::Close(frame) => AxumMessage::Close(frame.map(|frame| AxumCloseFrame {
2085            code: frame.code.into(),
2086            reason: frame.reason,
2087        })),
2088    }
2089}
2090
2091fn to_tungstenite_message(message: AxumMessage) -> TungsteniteMessage {
2092    match message {
2093        AxumMessage::Text(payload) => TungsteniteMessage::Text(payload),
2094        AxumMessage::Binary(payload) => TungsteniteMessage::Binary(payload),
2095        AxumMessage::Ping(payload) => TungsteniteMessage::Ping(payload),
2096        AxumMessage::Pong(payload) => TungsteniteMessage::Pong(payload),
2097        AxumMessage::Close(frame) => {
2098            TungsteniteMessage::Close(frame.map(|frame| TungsteniteCloseFrame {
2099                code: frame.code.into(),
2100                reason: frame.reason,
2101            }))
2102        }
2103    }
2104}
2105
2106pub trait ResultExt {
2107    type Ok;
2108
2109    fn trace_err(self) -> Option<Self::Ok>;
2110}
2111
2112impl<T, E> ResultExt for Result<T, E>
2113where
2114    E: std::fmt::Debug,
2115{
2116    type Ok = T;
2117
2118    fn trace_err(self) -> Option<T> {
2119        match self {
2120            Ok(value) => Some(value),
2121            Err(error) => {
2122                tracing::error!("{:?}", error);
2123                None
2124            }
2125        }
2126    }
2127}