1mod store;
   2
   3use super::{
   4    auth,
   5    db::{ChannelId, MessageId, UserId},
   6    AppState,
   7};
   8use anyhow::anyhow;
   9use async_std::{sync::RwLock, task};
  10use async_tungstenite::{tungstenite::protocol::Role, WebSocketStream};
  11use futures::{future::BoxFuture, FutureExt};
  12use postage::{mpsc, prelude::Sink as _, prelude::Stream as _};
  13use sha1::{Digest as _, Sha1};
  14use std::{
  15    any::TypeId,
  16    collections::{HashMap, HashSet},
  17    future::Future,
  18    mem,
  19    sync::Arc,
  20    time::Instant,
  21};
  22use store::{JoinedWorktree, Store, Worktree};
  23use surf::StatusCode;
  24use tide::log;
  25use tide::{
  26    http::headers::{HeaderName, CONNECTION, UPGRADE},
  27    Request, Response,
  28};
  29use time::OffsetDateTime;
  30use zrpc::{
  31    proto::{self, AnyTypedEnvelope, EnvelopedMessage},
  32    Connection, ConnectionId, Peer, TypedEnvelope,
  33};
  34
  35type MessageHandler = Box<
  36    dyn Send
  37        + Sync
  38        + Fn(Arc<Server>, Box<dyn AnyTypedEnvelope>) -> BoxFuture<'static, tide::Result<()>>,
  39>;
  40
  41pub struct Server {
  42    peer: Arc<Peer>,
  43    store: RwLock<Store>,
  44    app_state: Arc<AppState>,
  45    handlers: HashMap<TypeId, MessageHandler>,
  46    notifications: Option<mpsc::Sender<()>>,
  47}
  48
  49const MESSAGE_COUNT_PER_PAGE: usize = 100;
  50const MAX_MESSAGE_LEN: usize = 1024;
  51
  52impl Server {
  53    pub fn new(
  54        app_state: Arc<AppState>,
  55        peer: Arc<Peer>,
  56        notifications: Option<mpsc::Sender<()>>,
  57    ) -> Arc<Self> {
  58        let mut server = Self {
  59            peer,
  60            app_state,
  61            store: Default::default(),
  62            handlers: Default::default(),
  63            notifications,
  64        };
  65
  66        server
  67            .add_handler(Server::ping)
  68            .add_handler(Server::open_worktree)
  69            .add_handler(Server::close_worktree)
  70            .add_handler(Server::share_worktree)
  71            .add_handler(Server::unshare_worktree)
  72            .add_handler(Server::join_worktree)
  73            .add_handler(Server::leave_worktree)
  74            .add_handler(Server::update_worktree)
  75            .add_handler(Server::open_buffer)
  76            .add_handler(Server::close_buffer)
  77            .add_handler(Server::update_buffer)
  78            .add_handler(Server::buffer_saved)
  79            .add_handler(Server::save_buffer)
  80            .add_handler(Server::get_channels)
  81            .add_handler(Server::get_users)
  82            .add_handler(Server::join_channel)
  83            .add_handler(Server::leave_channel)
  84            .add_handler(Server::send_channel_message)
  85            .add_handler(Server::get_channel_messages);
  86
  87        Arc::new(server)
  88    }
  89
  90    fn add_handler<F, Fut, M>(&mut self, handler: F) -> &mut Self
  91    where
  92        F: 'static + Send + Sync + Fn(Arc<Self>, TypedEnvelope<M>) -> Fut,
  93        Fut: 'static + Send + Future<Output = tide::Result<()>>,
  94        M: EnvelopedMessage,
  95    {
  96        let prev_handler = self.handlers.insert(
  97            TypeId::of::<M>(),
  98            Box::new(move |server, envelope| {
  99                let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
 100                (handler)(server, *envelope).boxed()
 101            }),
 102        );
 103        if prev_handler.is_some() {
 104            panic!("registered a handler for the same message twice");
 105        }
 106        self
 107    }
 108
 109    pub fn handle_connection(
 110        self: &Arc<Self>,
 111        connection: Connection,
 112        addr: String,
 113        user_id: UserId,
 114    ) -> impl Future<Output = ()> {
 115        let mut this = self.clone();
 116        async move {
 117            let (connection_id, handle_io, mut incoming_rx) =
 118                this.peer.add_connection(connection).await;
 119            this.state_mut()
 120                .await
 121                .add_connection(connection_id, user_id);
 122            if let Err(err) = this.update_collaborators_for_users(&[user_id]).await {
 123                log::error!("error updating collaborators for {:?}: {}", user_id, err);
 124            }
 125
 126            let handle_io = handle_io.fuse();
 127            futures::pin_mut!(handle_io);
 128            loop {
 129                let next_message = incoming_rx.recv().fuse();
 130                futures::pin_mut!(next_message);
 131                futures::select_biased! {
 132                    message = next_message => {
 133                        if let Some(message) = message {
 134                            let start_time = Instant::now();
 135                            log::info!("RPC message received: {}", message.payload_type_name());
 136                            if let Some(handler) = this.handlers.get(&message.payload_type_id()) {
 137                                if let Err(err) = (handler)(this.clone(), message).await {
 138                                    log::error!("error handling message: {:?}", err);
 139                                } else {
 140                                    log::info!("RPC message handled. duration:{:?}", start_time.elapsed());
 141                                }
 142
 143                                if let Some(mut notifications) = this.notifications.clone() {
 144                                    let _ = notifications.send(()).await;
 145                                }
 146                            } else {
 147                                log::warn!("unhandled message: {}", message.payload_type_name());
 148                            }
 149                        } else {
 150                            log::info!("rpc connection closed {:?}", addr);
 151                            break;
 152                        }
 153                    }
 154                    handle_io = handle_io => {
 155                        if let Err(err) = handle_io {
 156                            log::error!("error handling rpc connection {:?} - {:?}", addr, err);
 157                        }
 158                        break;
 159                    }
 160                }
 161            }
 162
 163            if let Err(err) = this.sign_out(connection_id).await {
 164                log::error!("error signing out connection {:?} - {:?}", addr, err);
 165            }
 166        }
 167    }
 168
 169    async fn sign_out(self: &mut Arc<Self>, connection_id: ConnectionId) -> tide::Result<()> {
 170        self.peer.disconnect(connection_id).await;
 171        let removed_connection = self.state_mut().await.remove_connection(connection_id)?;
 172
 173        for (worktree_id, worktree) in removed_connection.hosted_worktrees {
 174            if let Some(share) = worktree.share {
 175                broadcast(
 176                    connection_id,
 177                    share.guest_connection_ids.keys().copied().collect(),
 178                    |conn_id| {
 179                        self.peer
 180                            .send(conn_id, proto::UnshareWorktree { worktree_id })
 181                    },
 182                )
 183                .await?;
 184            }
 185        }
 186
 187        for (worktree_id, peer_ids) in removed_connection.guest_worktree_ids {
 188            broadcast(connection_id, peer_ids, |conn_id| {
 189                self.peer.send(
 190                    conn_id,
 191                    proto::RemovePeer {
 192                        worktree_id,
 193                        peer_id: connection_id.0,
 194                    },
 195                )
 196            })
 197            .await?;
 198        }
 199
 200        self.update_collaborators_for_users(removed_connection.collaborator_ids.iter())
 201            .await?;
 202
 203        Ok(())
 204    }
 205
 206    async fn ping(self: Arc<Server>, request: TypedEnvelope<proto::Ping>) -> tide::Result<()> {
 207        self.peer.respond(request.receipt(), proto::Ack {}).await?;
 208        Ok(())
 209    }
 210
 211    async fn open_worktree(
 212        mut self: Arc<Server>,
 213        request: TypedEnvelope<proto::OpenWorktree>,
 214    ) -> tide::Result<()> {
 215        let receipt = request.receipt();
 216        let host_user_id = self
 217            .state()
 218            .await
 219            .user_id_for_connection(request.sender_id)?;
 220
 221        let mut collaborator_user_ids = HashSet::new();
 222        collaborator_user_ids.insert(host_user_id);
 223        for github_login in request.payload.collaborator_logins {
 224            match self.app_state.db.create_user(&github_login, false).await {
 225                Ok(collaborator_user_id) => {
 226                    collaborator_user_ids.insert(collaborator_user_id);
 227                }
 228                Err(err) => {
 229                    let message = err.to_string();
 230                    self.peer
 231                        .respond_with_error(receipt, proto::Error { message })
 232                        .await?;
 233                    return Ok(());
 234                }
 235            }
 236        }
 237
 238        let collaborator_user_ids = collaborator_user_ids.into_iter().collect::<Vec<_>>();
 239        let worktree_id = self.state_mut().await.add_worktree(Worktree {
 240            host_connection_id: request.sender_id,
 241            collaborator_user_ids: collaborator_user_ids.clone(),
 242            root_name: request.payload.root_name,
 243            share: None,
 244        });
 245
 246        self.peer
 247            .respond(receipt, proto::OpenWorktreeResponse { worktree_id })
 248            .await?;
 249        self.update_collaborators_for_users(&collaborator_user_ids)
 250            .await?;
 251
 252        Ok(())
 253    }
 254
 255    async fn close_worktree(
 256        mut self: Arc<Server>,
 257        request: TypedEnvelope<proto::CloseWorktree>,
 258    ) -> tide::Result<()> {
 259        let worktree_id = request.payload.worktree_id;
 260        let worktree = self
 261            .state_mut()
 262            .await
 263            .remove_worktree(worktree_id, request.sender_id)?;
 264
 265        if let Some(share) = worktree.share {
 266            broadcast(
 267                request.sender_id,
 268                share.guest_connection_ids.keys().copied().collect(),
 269                |conn_id| {
 270                    self.peer
 271                        .send(conn_id, proto::UnshareWorktree { worktree_id })
 272                },
 273            )
 274            .await?;
 275        }
 276        self.update_collaborators_for_users(&worktree.collaborator_user_ids)
 277            .await?;
 278        Ok(())
 279    }
 280
 281    async fn share_worktree(
 282        mut self: Arc<Server>,
 283        mut request: TypedEnvelope<proto::ShareWorktree>,
 284    ) -> tide::Result<()> {
 285        let worktree = request
 286            .payload
 287            .worktree
 288            .as_mut()
 289            .ok_or_else(|| anyhow!("missing worktree"))?;
 290        let entries = mem::take(&mut worktree.entries)
 291            .into_iter()
 292            .map(|entry| (entry.id, entry))
 293            .collect();
 294
 295        let collaborator_user_ids =
 296            self.state_mut()
 297                .await
 298                .share_worktree(worktree.id, request.sender_id, entries);
 299        if let Some(collaborator_user_ids) = collaborator_user_ids {
 300            self.peer
 301                .respond(request.receipt(), proto::ShareWorktreeResponse {})
 302                .await?;
 303            self.update_collaborators_for_users(&collaborator_user_ids)
 304                .await?;
 305        } else {
 306            self.peer
 307                .respond_with_error(
 308                    request.receipt(),
 309                    proto::Error {
 310                        message: "no such worktree".to_string(),
 311                    },
 312                )
 313                .await?;
 314        }
 315        Ok(())
 316    }
 317
 318    async fn unshare_worktree(
 319        mut self: Arc<Server>,
 320        request: TypedEnvelope<proto::UnshareWorktree>,
 321    ) -> tide::Result<()> {
 322        let worktree_id = request.payload.worktree_id;
 323        let worktree = self
 324            .state_mut()
 325            .await
 326            .unshare_worktree(worktree_id, request.sender_id)?;
 327
 328        broadcast(request.sender_id, worktree.connection_ids, |conn_id| {
 329            self.peer
 330                .send(conn_id, proto::UnshareWorktree { worktree_id })
 331        })
 332        .await?;
 333        self.update_collaborators_for_users(&worktree.collaborator_ids)
 334            .await?;
 335
 336        Ok(())
 337    }
 338
 339    async fn join_worktree(
 340        mut self: Arc<Server>,
 341        request: TypedEnvelope<proto::JoinWorktree>,
 342    ) -> tide::Result<()> {
 343        let worktree_id = request.payload.worktree_id;
 344        let user_id = self
 345            .state()
 346            .await
 347            .user_id_for_connection(request.sender_id)?;
 348
 349        let mut state = self.state_mut().await;
 350        match state.join_worktree(request.sender_id, user_id, worktree_id) {
 351            Ok(JoinedWorktree {
 352                replica_id,
 353                worktree,
 354            }) => {
 355                let share = worktree.share()?;
 356                let peer_count = share.guest_connection_ids.len();
 357                let mut peers = Vec::with_capacity(peer_count);
 358                peers.push(proto::Peer {
 359                    peer_id: worktree.host_connection_id.0,
 360                    replica_id: 0,
 361                });
 362                for (peer_conn_id, peer_replica_id) in &share.guest_connection_ids {
 363                    if *peer_conn_id != request.sender_id {
 364                        peers.push(proto::Peer {
 365                            peer_id: peer_conn_id.0,
 366                            replica_id: *peer_replica_id as u32,
 367                        });
 368                    }
 369                }
 370                let response = proto::JoinWorktreeResponse {
 371                    worktree: Some(proto::Worktree {
 372                        id: worktree_id,
 373                        root_name: worktree.root_name.clone(),
 374                        entries: share.entries.values().cloned().collect(),
 375                    }),
 376                    replica_id: replica_id as u32,
 377                    peers,
 378                };
 379                let connection_ids = worktree.connection_ids();
 380                let collaborator_user_ids = worktree.collaborator_user_ids.clone();
 381                drop(state);
 382
 383                broadcast(request.sender_id, connection_ids, |conn_id| {
 384                    self.peer.send(
 385                        conn_id,
 386                        proto::AddPeer {
 387                            worktree_id,
 388                            peer: Some(proto::Peer {
 389                                peer_id: request.sender_id.0,
 390                                replica_id: response.replica_id,
 391                            }),
 392                        },
 393                    )
 394                })
 395                .await?;
 396                self.peer.respond(request.receipt(), response).await?;
 397                self.update_collaborators_for_users(&collaborator_user_ids)
 398                    .await?;
 399            }
 400            Err(error) => {
 401                drop(state);
 402                self.peer
 403                    .respond_with_error(
 404                        request.receipt(),
 405                        proto::Error {
 406                            message: error.to_string(),
 407                        },
 408                    )
 409                    .await?;
 410            }
 411        }
 412
 413        Ok(())
 414    }
 415
 416    async fn leave_worktree(
 417        mut self: Arc<Server>,
 418        request: TypedEnvelope<proto::LeaveWorktree>,
 419    ) -> tide::Result<()> {
 420        let sender_id = request.sender_id;
 421        let worktree_id = request.payload.worktree_id;
 422        let worktree = self
 423            .state_mut()
 424            .await
 425            .leave_worktree(sender_id, worktree_id);
 426        if let Some(worktree) = worktree {
 427            broadcast(sender_id, worktree.connection_ids, |conn_id| {
 428                self.peer.send(
 429                    conn_id,
 430                    proto::RemovePeer {
 431                        worktree_id,
 432                        peer_id: sender_id.0,
 433                    },
 434                )
 435            })
 436            .await?;
 437            self.update_collaborators_for_users(&worktree.collaborator_ids)
 438                .await?;
 439        }
 440        Ok(())
 441    }
 442
 443    async fn update_worktree(
 444        mut self: Arc<Server>,
 445        request: TypedEnvelope<proto::UpdateWorktree>,
 446    ) -> tide::Result<()> {
 447        let connection_ids = self.state_mut().await.update_worktree(
 448            request.sender_id,
 449            request.payload.worktree_id,
 450            &request.payload.removed_entries,
 451            &request.payload.updated_entries,
 452        )?;
 453
 454        broadcast(request.sender_id, connection_ids, |connection_id| {
 455            self.peer
 456                .forward_send(request.sender_id, connection_id, request.payload.clone())
 457        })
 458        .await?;
 459
 460        Ok(())
 461    }
 462
 463    async fn open_buffer(
 464        self: Arc<Server>,
 465        request: TypedEnvelope<proto::OpenBuffer>,
 466    ) -> tide::Result<()> {
 467        let receipt = request.receipt();
 468        let host_connection_id = self
 469            .state()
 470            .await
 471            .worktree_host_connection_id(request.sender_id, request.payload.worktree_id)?;
 472        let response = self
 473            .peer
 474            .forward_request(request.sender_id, host_connection_id, request.payload)
 475            .await?;
 476        self.peer.respond(receipt, response).await?;
 477        Ok(())
 478    }
 479
 480    async fn close_buffer(
 481        self: Arc<Server>,
 482        request: TypedEnvelope<proto::CloseBuffer>,
 483    ) -> tide::Result<()> {
 484        let host_connection_id = self
 485            .state()
 486            .await
 487            .worktree_host_connection_id(request.sender_id, request.payload.worktree_id)?;
 488        self.peer
 489            .forward_send(request.sender_id, host_connection_id, request.payload)
 490            .await?;
 491        Ok(())
 492    }
 493
 494    async fn save_buffer(
 495        self: Arc<Server>,
 496        request: TypedEnvelope<proto::SaveBuffer>,
 497    ) -> tide::Result<()> {
 498        let host;
 499        let guests;
 500        {
 501            let state = self.state().await;
 502            host = state
 503                .worktree_host_connection_id(request.sender_id, request.payload.worktree_id)?;
 504            guests = state
 505                .worktree_guest_connection_ids(request.sender_id, request.payload.worktree_id)?;
 506        }
 507
 508        let sender = request.sender_id;
 509        let receipt = request.receipt();
 510        let response = self
 511            .peer
 512            .forward_request(sender, host, request.payload.clone())
 513            .await?;
 514
 515        broadcast(host, guests, |conn_id| {
 516            let response = response.clone();
 517            let peer = &self.peer;
 518            async move {
 519                if conn_id == sender {
 520                    peer.respond(receipt, response).await
 521                } else {
 522                    peer.forward_send(host, conn_id, response).await
 523                }
 524            }
 525        })
 526        .await?;
 527
 528        Ok(())
 529    }
 530
 531    async fn update_buffer(
 532        self: Arc<Server>,
 533        request: TypedEnvelope<proto::UpdateBuffer>,
 534    ) -> tide::Result<()> {
 535        broadcast(
 536            request.sender_id,
 537            self.state()
 538                .await
 539                .worktree_connection_ids(request.sender_id, request.payload.worktree_id)?,
 540            |connection_id| {
 541                self.peer
 542                    .forward_send(request.sender_id, connection_id, request.payload.clone())
 543            },
 544        )
 545        .await?;
 546        self.peer.respond(request.receipt(), proto::Ack {}).await?;
 547        Ok(())
 548    }
 549
 550    async fn buffer_saved(
 551        self: Arc<Server>,
 552        request: TypedEnvelope<proto::BufferSaved>,
 553    ) -> tide::Result<()> {
 554        broadcast(
 555            request.sender_id,
 556            self.store
 557                .read()
 558                .await
 559                .worktree_connection_ids(request.sender_id, request.payload.worktree_id)?,
 560            |connection_id| {
 561                self.peer
 562                    .forward_send(request.sender_id, connection_id, request.payload.clone())
 563            },
 564        )
 565        .await?;
 566        Ok(())
 567    }
 568
 569    async fn get_channels(
 570        self: Arc<Server>,
 571        request: TypedEnvelope<proto::GetChannels>,
 572    ) -> tide::Result<()> {
 573        let user_id = self
 574            .state()
 575            .await
 576            .user_id_for_connection(request.sender_id)?;
 577        let channels = self.app_state.db.get_accessible_channels(user_id).await?;
 578        self.peer
 579            .respond(
 580                request.receipt(),
 581                proto::GetChannelsResponse {
 582                    channels: channels
 583                        .into_iter()
 584                        .map(|chan| proto::Channel {
 585                            id: chan.id.to_proto(),
 586                            name: chan.name,
 587                        })
 588                        .collect(),
 589                },
 590            )
 591            .await?;
 592        Ok(())
 593    }
 594
 595    async fn get_users(
 596        self: Arc<Server>,
 597        request: TypedEnvelope<proto::GetUsers>,
 598    ) -> tide::Result<()> {
 599        let receipt = request.receipt();
 600        let user_ids = request.payload.user_ids.into_iter().map(UserId::from_proto);
 601        let users = self
 602            .app_state
 603            .db
 604            .get_users_by_ids(user_ids)
 605            .await?
 606            .into_iter()
 607            .map(|user| proto::User {
 608                id: user.id.to_proto(),
 609                avatar_url: format!("https://github.com/{}.png?size=128", user.github_login),
 610                github_login: user.github_login,
 611            })
 612            .collect();
 613        self.peer
 614            .respond(receipt, proto::GetUsersResponse { users })
 615            .await?;
 616        Ok(())
 617    }
 618
 619    async fn update_collaborators_for_users<'a>(
 620        self: &Arc<Server>,
 621        user_ids: impl IntoIterator<Item = &'a UserId>,
 622    ) -> tide::Result<()> {
 623        let mut send_futures = Vec::new();
 624
 625        let state = self.state().await;
 626        for user_id in user_ids {
 627            let collaborators = state.collaborators_for_user(*user_id);
 628            for connection_id in state.connection_ids_for_user(*user_id) {
 629                send_futures.push(self.peer.send(
 630                    connection_id,
 631                    proto::UpdateCollaborators {
 632                        collaborators: collaborators.clone(),
 633                    },
 634                ));
 635            }
 636        }
 637
 638        drop(state);
 639        futures::future::try_join_all(send_futures).await?;
 640
 641        Ok(())
 642    }
 643
 644    async fn join_channel(
 645        mut self: Arc<Self>,
 646        request: TypedEnvelope<proto::JoinChannel>,
 647    ) -> tide::Result<()> {
 648        let user_id = self
 649            .state()
 650            .await
 651            .user_id_for_connection(request.sender_id)?;
 652        let channel_id = ChannelId::from_proto(request.payload.channel_id);
 653        if !self
 654            .app_state
 655            .db
 656            .can_user_access_channel(user_id, channel_id)
 657            .await?
 658        {
 659            Err(anyhow!("access denied"))?;
 660        }
 661
 662        self.state_mut()
 663            .await
 664            .join_channel(request.sender_id, channel_id);
 665        let messages = self
 666            .app_state
 667            .db
 668            .get_channel_messages(channel_id, MESSAGE_COUNT_PER_PAGE, None)
 669            .await?
 670            .into_iter()
 671            .map(|msg| proto::ChannelMessage {
 672                id: msg.id.to_proto(),
 673                body: msg.body,
 674                timestamp: msg.sent_at.unix_timestamp() as u64,
 675                sender_id: msg.sender_id.to_proto(),
 676                nonce: Some(msg.nonce.as_u128().into()),
 677            })
 678            .collect::<Vec<_>>();
 679        self.peer
 680            .respond(
 681                request.receipt(),
 682                proto::JoinChannelResponse {
 683                    done: messages.len() < MESSAGE_COUNT_PER_PAGE,
 684                    messages,
 685                },
 686            )
 687            .await?;
 688        Ok(())
 689    }
 690
 691    async fn leave_channel(
 692        mut self: Arc<Self>,
 693        request: TypedEnvelope<proto::LeaveChannel>,
 694    ) -> tide::Result<()> {
 695        let user_id = self
 696            .state()
 697            .await
 698            .user_id_for_connection(request.sender_id)?;
 699        let channel_id = ChannelId::from_proto(request.payload.channel_id);
 700        if !self
 701            .app_state
 702            .db
 703            .can_user_access_channel(user_id, channel_id)
 704            .await?
 705        {
 706            Err(anyhow!("access denied"))?;
 707        }
 708
 709        self.state_mut()
 710            .await
 711            .leave_channel(request.sender_id, channel_id);
 712
 713        Ok(())
 714    }
 715
 716    async fn send_channel_message(
 717        self: Arc<Self>,
 718        request: TypedEnvelope<proto::SendChannelMessage>,
 719    ) -> tide::Result<()> {
 720        let receipt = request.receipt();
 721        let channel_id = ChannelId::from_proto(request.payload.channel_id);
 722        let user_id;
 723        let connection_ids;
 724        {
 725            let state = self.state().await;
 726            user_id = state.user_id_for_connection(request.sender_id)?;
 727            if let Some(ids) = state.channel_connection_ids(channel_id) {
 728                connection_ids = ids;
 729            } else {
 730                return Ok(());
 731            }
 732        }
 733
 734        // Validate the message body.
 735        let body = request.payload.body.trim().to_string();
 736        if body.len() > MAX_MESSAGE_LEN {
 737            self.peer
 738                .respond_with_error(
 739                    receipt,
 740                    proto::Error {
 741                        message: "message is too long".to_string(),
 742                    },
 743                )
 744                .await?;
 745            return Ok(());
 746        }
 747        if body.is_empty() {
 748            self.peer
 749                .respond_with_error(
 750                    receipt,
 751                    proto::Error {
 752                        message: "message can't be blank".to_string(),
 753                    },
 754                )
 755                .await?;
 756            return Ok(());
 757        }
 758
 759        let timestamp = OffsetDateTime::now_utc();
 760        let nonce = if let Some(nonce) = request.payload.nonce {
 761            nonce
 762        } else {
 763            self.peer
 764                .respond_with_error(
 765                    receipt,
 766                    proto::Error {
 767                        message: "nonce can't be blank".to_string(),
 768                    },
 769                )
 770                .await?;
 771            return Ok(());
 772        };
 773
 774        let message_id = self
 775            .app_state
 776            .db
 777            .create_channel_message(channel_id, user_id, &body, timestamp, nonce.clone().into())
 778            .await?
 779            .to_proto();
 780        let message = proto::ChannelMessage {
 781            sender_id: user_id.to_proto(),
 782            id: message_id,
 783            body,
 784            timestamp: timestamp.unix_timestamp() as u64,
 785            nonce: Some(nonce),
 786        };
 787        broadcast(request.sender_id, connection_ids, |conn_id| {
 788            self.peer.send(
 789                conn_id,
 790                proto::ChannelMessageSent {
 791                    channel_id: channel_id.to_proto(),
 792                    message: Some(message.clone()),
 793                },
 794            )
 795        })
 796        .await?;
 797        self.peer
 798            .respond(
 799                receipt,
 800                proto::SendChannelMessageResponse {
 801                    message: Some(message),
 802                },
 803            )
 804            .await?;
 805        Ok(())
 806    }
 807
 808    async fn get_channel_messages(
 809        self: Arc<Self>,
 810        request: TypedEnvelope<proto::GetChannelMessages>,
 811    ) -> tide::Result<()> {
 812        let user_id = self
 813            .state()
 814            .await
 815            .user_id_for_connection(request.sender_id)?;
 816        let channel_id = ChannelId::from_proto(request.payload.channel_id);
 817        if !self
 818            .app_state
 819            .db
 820            .can_user_access_channel(user_id, channel_id)
 821            .await?
 822        {
 823            Err(anyhow!("access denied"))?;
 824        }
 825
 826        let messages = self
 827            .app_state
 828            .db
 829            .get_channel_messages(
 830                channel_id,
 831                MESSAGE_COUNT_PER_PAGE,
 832                Some(MessageId::from_proto(request.payload.before_message_id)),
 833            )
 834            .await?
 835            .into_iter()
 836            .map(|msg| proto::ChannelMessage {
 837                id: msg.id.to_proto(),
 838                body: msg.body,
 839                timestamp: msg.sent_at.unix_timestamp() as u64,
 840                sender_id: msg.sender_id.to_proto(),
 841                nonce: Some(msg.nonce.as_u128().into()),
 842            })
 843            .collect::<Vec<_>>();
 844        self.peer
 845            .respond(
 846                request.receipt(),
 847                proto::GetChannelMessagesResponse {
 848                    done: messages.len() < MESSAGE_COUNT_PER_PAGE,
 849                    messages,
 850                },
 851            )
 852            .await?;
 853        Ok(())
 854    }
 855
 856    fn state<'a>(
 857        self: &'a Arc<Self>,
 858    ) -> impl Future<Output = async_std::sync::RwLockReadGuard<'a, Store>> {
 859        self.store.read()
 860    }
 861
 862    fn state_mut<'a>(
 863        self: &'a mut Arc<Self>,
 864    ) -> impl Future<Output = async_std::sync::RwLockWriteGuard<'a, Store>> {
 865        self.store.write()
 866    }
 867}
 868
 869pub async fn broadcast<F, T>(
 870    sender_id: ConnectionId,
 871    receiver_ids: Vec<ConnectionId>,
 872    mut f: F,
 873) -> anyhow::Result<()>
 874where
 875    F: FnMut(ConnectionId) -> T,
 876    T: Future<Output = anyhow::Result<()>>,
 877{
 878    let futures = receiver_ids
 879        .into_iter()
 880        .filter(|id| *id != sender_id)
 881        .map(|id| f(id));
 882    futures::future::try_join_all(futures).await?;
 883    Ok(())
 884}
 885
 886pub fn add_routes(app: &mut tide::Server<Arc<AppState>>, rpc: &Arc<Peer>) {
 887    let server = Server::new(app.state().clone(), rpc.clone(), None);
 888    app.at("/rpc").with(auth::VerifyToken).get(move |request: Request<Arc<AppState>>| {
 889        let user_id = request.ext::<UserId>().copied();
 890        let server = server.clone();
 891        async move {
 892            const WEBSOCKET_GUID: &str = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 893
 894            let connection_upgrade = header_contains_ignore_case(&request, CONNECTION, "upgrade");
 895            let upgrade_to_websocket = header_contains_ignore_case(&request, UPGRADE, "websocket");
 896            let upgrade_requested = connection_upgrade && upgrade_to_websocket;
 897
 898            if !upgrade_requested {
 899                return Ok(Response::new(StatusCode::UpgradeRequired));
 900            }
 901
 902            let header = match request.header("Sec-Websocket-Key") {
 903                Some(h) => h.as_str(),
 904                None => return Err(anyhow!("expected sec-websocket-key"))?,
 905            };
 906
 907            let mut response = Response::new(StatusCode::SwitchingProtocols);
 908            response.insert_header(UPGRADE, "websocket");
 909            response.insert_header(CONNECTION, "Upgrade");
 910            let hash = Sha1::new().chain(header).chain(WEBSOCKET_GUID).finalize();
 911            response.insert_header("Sec-Websocket-Accept", base64::encode(&hash[..]));
 912            response.insert_header("Sec-Websocket-Version", "13");
 913
 914            let http_res: &mut tide::http::Response = response.as_mut();
 915            let upgrade_receiver = http_res.recv_upgrade().await;
 916            let addr = request.remote().unwrap_or("unknown").to_string();
 917            let user_id = user_id.ok_or_else(|| anyhow!("user_id is not present on request. ensure auth::VerifyToken middleware is present"))?;
 918            task::spawn(async move {
 919                if let Some(stream) = upgrade_receiver.await {
 920                    server.handle_connection(Connection::new(WebSocketStream::from_raw_socket(stream, Role::Server, None).await), addr, user_id).await;
 921                }
 922            });
 923
 924            Ok(response)
 925        }
 926    });
 927}
 928
 929fn header_contains_ignore_case<T>(
 930    request: &tide::Request<T>,
 931    header_name: HeaderName,
 932    value: &str,
 933) -> bool {
 934    request
 935        .header(header_name)
 936        .map(|h| {
 937            h.as_str()
 938                .split(',')
 939                .any(|s| s.trim().eq_ignore_ascii_case(value.trim()))
 940        })
 941        .unwrap_or(false)
 942}
 943
 944#[cfg(test)]
 945mod tests {
 946    use super::*;
 947    use crate::{
 948        auth,
 949        db::{tests::TestDb, UserId},
 950        github, AppState, Config,
 951    };
 952    use async_std::{sync::RwLockReadGuard, task};
 953    use gpui::{ModelHandle, TestAppContext};
 954    use parking_lot::Mutex;
 955    use postage::{mpsc, watch};
 956    use serde_json::json;
 957    use sqlx::types::time::OffsetDateTime;
 958    use std::{
 959        path::Path,
 960        sync::{
 961            atomic::{AtomicBool, Ordering::SeqCst},
 962            Arc,
 963        },
 964        time::Duration,
 965    };
 966    use zed::{
 967        channel::{Channel, ChannelDetails, ChannelList},
 968        editor::{Editor, EditorStyle, Insert},
 969        fs::{FakeFs, Fs as _},
 970        language::LanguageRegistry,
 971        rpc::{self, Client, Credentials, EstablishConnectionError},
 972        settings,
 973        test::FakeHttpClient,
 974        user::UserStore,
 975        worktree::Worktree,
 976    };
 977    use zrpc::Peer;
 978
 979    #[gpui::test]
 980    async fn test_share_worktree(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
 981        let (window_b, _) = cx_b.add_window(|_| EmptyView);
 982        let settings = cx_b.read(settings::test).1;
 983        let lang_registry = Arc::new(LanguageRegistry::new());
 984
 985        // Connect to a server as 2 clients.
 986        let mut server = TestServer::start().await;
 987        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
 988        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
 989
 990        cx_a.foreground().forbid_parking();
 991
 992        // Share a local worktree as client A
 993        let fs = Arc::new(FakeFs::new());
 994        fs.insert_tree(
 995            "/a",
 996            json!({
 997                ".zed.toml": r#"collaborators = ["user_b"]"#,
 998                "a.txt": "a-contents",
 999                "b.txt": "b-contents",
1000            }),
1001        )
1002        .await;
1003        let worktree_a = Worktree::open_local(
1004            client_a.clone(),
1005            "/a".as_ref(),
1006            fs,
1007            lang_registry.clone(),
1008            &mut cx_a.to_async(),
1009        )
1010        .await
1011        .unwrap();
1012        worktree_a
1013            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1014            .await;
1015        let worktree_id = worktree_a
1016            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1017            .await
1018            .unwrap();
1019
1020        // Join that worktree as client B, and see that a guest has joined as client A.
1021        let worktree_b = Worktree::open_remote(
1022            client_b.clone(),
1023            worktree_id,
1024            lang_registry.clone(),
1025            &mut cx_b.to_async(),
1026        )
1027        .await
1028        .unwrap();
1029        let replica_id_b = worktree_b.read_with(&cx_b, |tree, _| tree.replica_id());
1030        worktree_a
1031            .condition(&cx_a, |tree, _| {
1032                tree.peers()
1033                    .values()
1034                    .any(|replica_id| *replica_id == replica_id_b)
1035            })
1036            .await;
1037
1038        // Open the same file as client B and client A.
1039        let buffer_b = worktree_b
1040            .update(&mut cx_b, |worktree, cx| worktree.open_buffer("b.txt", cx))
1041            .await
1042            .unwrap();
1043        buffer_b.read_with(&cx_b, |buf, _| assert_eq!(buf.text(), "b-contents"));
1044        worktree_a.read_with(&cx_a, |tree, cx| assert!(tree.has_open_buffer("b.txt", cx)));
1045        let buffer_a = worktree_a
1046            .update(&mut cx_a, |tree, cx| tree.open_buffer("b.txt", cx))
1047            .await
1048            .unwrap();
1049
1050        // Create a selection set as client B and see that selection set as client A.
1051        let editor_b = cx_b.add_view(window_b, |cx| {
1052            Editor::for_buffer(
1053                buffer_b,
1054                settings,
1055                |cx| EditorStyle::test(cx.font_cache()),
1056                cx,
1057            )
1058        });
1059        buffer_a
1060            .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 1)
1061            .await;
1062
1063        // Edit the buffer as client B and see that edit as client A.
1064        editor_b.update(&mut cx_b, |editor, cx| {
1065            editor.insert(&Insert("ok, ".into()), cx)
1066        });
1067        buffer_a
1068            .condition(&cx_a, |buffer, _| buffer.text() == "ok, b-contents")
1069            .await;
1070
1071        // Remove the selection set as client B, see those selections disappear as client A.
1072        cx_b.update(move |_| drop(editor_b));
1073        buffer_a
1074            .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 0)
1075            .await;
1076
1077        // Close the buffer as client A, see that the buffer is closed.
1078        cx_a.update(move |_| drop(buffer_a));
1079        worktree_a
1080            .condition(&cx_a, |tree, cx| !tree.has_open_buffer("b.txt", cx))
1081            .await;
1082
1083        // Dropping the worktree removes client B from client A's peers.
1084        cx_b.update(move |_| drop(worktree_b));
1085        worktree_a
1086            .condition(&cx_a, |tree, _| tree.peers().is_empty())
1087            .await;
1088    }
1089
1090    #[gpui::test]
1091    async fn test_propagate_saves_and_fs_changes_in_shared_worktree(
1092        mut cx_a: TestAppContext,
1093        mut cx_b: TestAppContext,
1094        mut cx_c: TestAppContext,
1095    ) {
1096        cx_a.foreground().forbid_parking();
1097        let lang_registry = Arc::new(LanguageRegistry::new());
1098
1099        // Connect to a server as 3 clients.
1100        let mut server = TestServer::start().await;
1101        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1102        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1103        let (client_c, _) = server.create_client(&mut cx_c, "user_c").await;
1104
1105        let fs = Arc::new(FakeFs::new());
1106
1107        // Share a worktree as client A.
1108        fs.insert_tree(
1109            "/a",
1110            json!({
1111                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
1112                "file1": "",
1113                "file2": ""
1114            }),
1115        )
1116        .await;
1117
1118        let worktree_a = Worktree::open_local(
1119            client_a.clone(),
1120            "/a".as_ref(),
1121            fs.clone(),
1122            lang_registry.clone(),
1123            &mut cx_a.to_async(),
1124        )
1125        .await
1126        .unwrap();
1127        worktree_a
1128            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1129            .await;
1130        let worktree_id = worktree_a
1131            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1132            .await
1133            .unwrap();
1134
1135        // Join that worktree as clients B and C.
1136        let worktree_b = Worktree::open_remote(
1137            client_b.clone(),
1138            worktree_id,
1139            lang_registry.clone(),
1140            &mut cx_b.to_async(),
1141        )
1142        .await
1143        .unwrap();
1144        let worktree_c = Worktree::open_remote(
1145            client_c.clone(),
1146            worktree_id,
1147            lang_registry.clone(),
1148            &mut cx_c.to_async(),
1149        )
1150        .await
1151        .unwrap();
1152
1153        // Open and edit a buffer as both guests B and C.
1154        let buffer_b = worktree_b
1155            .update(&mut cx_b, |tree, cx| tree.open_buffer("file1", cx))
1156            .await
1157            .unwrap();
1158        let buffer_c = worktree_c
1159            .update(&mut cx_c, |tree, cx| tree.open_buffer("file1", cx))
1160            .await
1161            .unwrap();
1162        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "i-am-b, ", cx));
1163        buffer_c.update(&mut cx_c, |buf, cx| buf.edit([0..0], "i-am-c, ", cx));
1164
1165        // Open and edit that buffer as the host.
1166        let buffer_a = worktree_a
1167            .update(&mut cx_a, |tree, cx| tree.open_buffer("file1", cx))
1168            .await
1169            .unwrap();
1170
1171        buffer_a
1172            .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, ")
1173            .await;
1174        buffer_a.update(&mut cx_a, |buf, cx| {
1175            buf.edit([buf.len()..buf.len()], "i-am-a", cx)
1176        });
1177
1178        // Wait for edits to propagate
1179        buffer_a
1180            .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1181            .await;
1182        buffer_b
1183            .condition(&mut cx_b, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1184            .await;
1185        buffer_c
1186            .condition(&mut cx_c, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1187            .await;
1188
1189        // Edit the buffer as the host and concurrently save as guest B.
1190        let save_b = buffer_b.update(&mut cx_b, |buf, cx| buf.save(cx).unwrap());
1191        buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "hi-a, ", cx));
1192        save_b.await.unwrap();
1193        assert_eq!(
1194            fs.load("/a/file1".as_ref()).await.unwrap(),
1195            "hi-a, i-am-c, i-am-b, i-am-a"
1196        );
1197        buffer_a.read_with(&cx_a, |buf, _| assert!(!buf.is_dirty()));
1198        buffer_b.read_with(&cx_b, |buf, _| assert!(!buf.is_dirty()));
1199        buffer_c.condition(&cx_c, |buf, _| !buf.is_dirty()).await;
1200
1201        // Make changes on host's file system, see those changes on the guests.
1202        fs.rename("/a/file2".as_ref(), "/a/file3".as_ref())
1203            .await
1204            .unwrap();
1205        fs.insert_file(Path::new("/a/file4"), "4".into())
1206            .await
1207            .unwrap();
1208
1209        worktree_b
1210            .condition(&cx_b, |tree, _| tree.file_count() == 4)
1211            .await;
1212        worktree_c
1213            .condition(&cx_c, |tree, _| tree.file_count() == 4)
1214            .await;
1215        worktree_b.read_with(&cx_b, |tree, _| {
1216            assert_eq!(
1217                tree.paths()
1218                    .map(|p| p.to_string_lossy())
1219                    .collect::<Vec<_>>(),
1220                &[".zed.toml", "file1", "file3", "file4"]
1221            )
1222        });
1223        worktree_c.read_with(&cx_c, |tree, _| {
1224            assert_eq!(
1225                tree.paths()
1226                    .map(|p| p.to_string_lossy())
1227                    .collect::<Vec<_>>(),
1228                &[".zed.toml", "file1", "file3", "file4"]
1229            )
1230        });
1231    }
1232
1233    #[gpui::test]
1234    async fn test_buffer_conflict_after_save(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1235        cx_a.foreground().forbid_parking();
1236        let lang_registry = Arc::new(LanguageRegistry::new());
1237
1238        // Connect to a server as 2 clients.
1239        let mut server = TestServer::start().await;
1240        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1241        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1242
1243        // Share a local worktree as client A
1244        let fs = Arc::new(FakeFs::new());
1245        fs.insert_tree(
1246            "/dir",
1247            json!({
1248                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
1249                "a.txt": "a-contents",
1250            }),
1251        )
1252        .await;
1253
1254        let worktree_a = Worktree::open_local(
1255            client_a.clone(),
1256            "/dir".as_ref(),
1257            fs,
1258            lang_registry.clone(),
1259            &mut cx_a.to_async(),
1260        )
1261        .await
1262        .unwrap();
1263        worktree_a
1264            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1265            .await;
1266        let worktree_id = worktree_a
1267            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1268            .await
1269            .unwrap();
1270
1271        // Join that worktree as client B, and see that a guest has joined as client A.
1272        let worktree_b = Worktree::open_remote(
1273            client_b.clone(),
1274            worktree_id,
1275            lang_registry.clone(),
1276            &mut cx_b.to_async(),
1277        )
1278        .await
1279        .unwrap();
1280
1281        let buffer_b = worktree_b
1282            .update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx))
1283            .await
1284            .unwrap();
1285        let mtime = buffer_b.read_with(&cx_b, |buf, _| buf.file().unwrap().mtime);
1286
1287        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "world ", cx));
1288        buffer_b.read_with(&cx_b, |buf, _| {
1289            assert!(buf.is_dirty());
1290            assert!(!buf.has_conflict());
1291        });
1292
1293        buffer_b
1294            .update(&mut cx_b, |buf, cx| buf.save(cx))
1295            .unwrap()
1296            .await
1297            .unwrap();
1298        worktree_b
1299            .condition(&cx_b, |_, cx| {
1300                buffer_b.read(cx).file().unwrap().mtime != mtime
1301            })
1302            .await;
1303        buffer_b.read_with(&cx_b, |buf, _| {
1304            assert!(!buf.is_dirty());
1305            assert!(!buf.has_conflict());
1306        });
1307
1308        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "hello ", cx));
1309        buffer_b.read_with(&cx_b, |buf, _| {
1310            assert!(buf.is_dirty());
1311            assert!(!buf.has_conflict());
1312        });
1313    }
1314
1315    #[gpui::test]
1316    async fn test_editing_while_guest_opens_buffer(
1317        mut cx_a: TestAppContext,
1318        mut cx_b: TestAppContext,
1319    ) {
1320        cx_a.foreground().forbid_parking();
1321        let lang_registry = Arc::new(LanguageRegistry::new());
1322
1323        // Connect to a server as 2 clients.
1324        let mut server = TestServer::start().await;
1325        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1326        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1327
1328        // Share a local worktree as client A
1329        let fs = Arc::new(FakeFs::new());
1330        fs.insert_tree(
1331            "/dir",
1332            json!({
1333                ".zed.toml": r#"collaborators = ["user_b"]"#,
1334                "a.txt": "a-contents",
1335            }),
1336        )
1337        .await;
1338        let worktree_a = Worktree::open_local(
1339            client_a.clone(),
1340            "/dir".as_ref(),
1341            fs,
1342            lang_registry.clone(),
1343            &mut cx_a.to_async(),
1344        )
1345        .await
1346        .unwrap();
1347        worktree_a
1348            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1349            .await;
1350        let worktree_id = worktree_a
1351            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1352            .await
1353            .unwrap();
1354
1355        // Join that worktree as client B, and see that a guest has joined as client A.
1356        let worktree_b = Worktree::open_remote(
1357            client_b.clone(),
1358            worktree_id,
1359            lang_registry.clone(),
1360            &mut cx_b.to_async(),
1361        )
1362        .await
1363        .unwrap();
1364
1365        let buffer_a = worktree_a
1366            .update(&mut cx_a, |tree, cx| tree.open_buffer("a.txt", cx))
1367            .await
1368            .unwrap();
1369        let buffer_b = cx_b
1370            .background()
1371            .spawn(worktree_b.update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx)));
1372
1373        task::yield_now().await;
1374        buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "z", cx));
1375
1376        let text = buffer_a.read_with(&cx_a, |buf, _| buf.text());
1377        let buffer_b = buffer_b.await.unwrap();
1378        buffer_b.condition(&cx_b, |buf, _| buf.text() == text).await;
1379    }
1380
1381    #[gpui::test]
1382    async fn test_leaving_worktree_while_opening_buffer(
1383        mut cx_a: TestAppContext,
1384        mut cx_b: TestAppContext,
1385    ) {
1386        cx_a.foreground().forbid_parking();
1387        let lang_registry = Arc::new(LanguageRegistry::new());
1388
1389        // Connect to a server as 2 clients.
1390        let mut server = TestServer::start().await;
1391        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1392        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1393
1394        // Share a local worktree as client A
1395        let fs = Arc::new(FakeFs::new());
1396        fs.insert_tree(
1397            "/dir",
1398            json!({
1399                ".zed.toml": r#"collaborators = ["user_b"]"#,
1400                "a.txt": "a-contents",
1401            }),
1402        )
1403        .await;
1404        let worktree_a = Worktree::open_local(
1405            client_a.clone(),
1406            "/dir".as_ref(),
1407            fs,
1408            lang_registry.clone(),
1409            &mut cx_a.to_async(),
1410        )
1411        .await
1412        .unwrap();
1413        worktree_a
1414            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1415            .await;
1416        let worktree_id = worktree_a
1417            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1418            .await
1419            .unwrap();
1420
1421        // Join that worktree as client B, and see that a guest has joined as client A.
1422        let worktree_b = Worktree::open_remote(
1423            client_b.clone(),
1424            worktree_id,
1425            lang_registry.clone(),
1426            &mut cx_b.to_async(),
1427        )
1428        .await
1429        .unwrap();
1430        worktree_a
1431            .condition(&cx_a, |tree, _| tree.peers().len() == 1)
1432            .await;
1433
1434        let buffer_b = cx_b
1435            .background()
1436            .spawn(worktree_b.update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx)));
1437        cx_b.update(|_| drop(worktree_b));
1438        drop(buffer_b);
1439        worktree_a
1440            .condition(&cx_a, |tree, _| tree.peers().len() == 0)
1441            .await;
1442    }
1443
1444    #[gpui::test]
1445    async fn test_peer_disconnection(mut cx_a: TestAppContext, cx_b: TestAppContext) {
1446        cx_a.foreground().forbid_parking();
1447        let lang_registry = Arc::new(LanguageRegistry::new());
1448
1449        // Connect to a server as 2 clients.
1450        let mut server = TestServer::start().await;
1451        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1452        let (client_b, _) = server.create_client(&mut cx_a, "user_b").await;
1453
1454        // Share a local worktree as client A
1455        let fs = Arc::new(FakeFs::new());
1456        fs.insert_tree(
1457            "/a",
1458            json!({
1459                ".zed.toml": r#"collaborators = ["user_b"]"#,
1460                "a.txt": "a-contents",
1461                "b.txt": "b-contents",
1462            }),
1463        )
1464        .await;
1465        let worktree_a = Worktree::open_local(
1466            client_a.clone(),
1467            "/a".as_ref(),
1468            fs,
1469            lang_registry.clone(),
1470            &mut cx_a.to_async(),
1471        )
1472        .await
1473        .unwrap();
1474        worktree_a
1475            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1476            .await;
1477        let worktree_id = worktree_a
1478            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1479            .await
1480            .unwrap();
1481
1482        // Join that worktree as client B, and see that a guest has joined as client A.
1483        let _worktree_b = Worktree::open_remote(
1484            client_b.clone(),
1485            worktree_id,
1486            lang_registry.clone(),
1487            &mut cx_b.to_async(),
1488        )
1489        .await
1490        .unwrap();
1491        worktree_a
1492            .condition(&cx_a, |tree, _| tree.peers().len() == 1)
1493            .await;
1494
1495        // Drop client B's connection and ensure client A observes client B leaving the worktree.
1496        client_b.disconnect(&cx_b.to_async()).await.unwrap();
1497        worktree_a
1498            .condition(&cx_a, |tree, _| tree.peers().len() == 0)
1499            .await;
1500    }
1501
1502    #[gpui::test]
1503    async fn test_basic_chat(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1504        cx_a.foreground().forbid_parking();
1505
1506        // Connect to a server as 2 clients.
1507        let mut server = TestServer::start().await;
1508        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1509        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1510
1511        // Create an org that includes these 2 users.
1512        let db = &server.app_state.db;
1513        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1514        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1515            .await
1516            .unwrap();
1517        db.add_org_member(org_id, current_user_id(&user_store_b, &cx_b), false)
1518            .await
1519            .unwrap();
1520
1521        // Create a channel that includes all the users.
1522        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1523        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1524            .await
1525            .unwrap();
1526        db.add_channel_member(channel_id, current_user_id(&user_store_b, &cx_b), false)
1527            .await
1528            .unwrap();
1529        db.create_channel_message(
1530            channel_id,
1531            current_user_id(&user_store_b, &cx_b),
1532            "hello A, it's B.",
1533            OffsetDateTime::now_utc(),
1534            1,
1535        )
1536        .await
1537        .unwrap();
1538
1539        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1540        channels_a
1541            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1542            .await;
1543        channels_a.read_with(&cx_a, |list, _| {
1544            assert_eq!(
1545                list.available_channels().unwrap(),
1546                &[ChannelDetails {
1547                    id: channel_id.to_proto(),
1548                    name: "test-channel".to_string()
1549                }]
1550            )
1551        });
1552        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1553            this.get_channel(channel_id.to_proto(), cx).unwrap()
1554        });
1555        channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1556        channel_a
1557            .condition(&cx_a, |channel, _| {
1558                channel_messages(channel)
1559                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1560            })
1561            .await;
1562
1563        let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b, client_b, cx));
1564        channels_b
1565            .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1566            .await;
1567        channels_b.read_with(&cx_b, |list, _| {
1568            assert_eq!(
1569                list.available_channels().unwrap(),
1570                &[ChannelDetails {
1571                    id: channel_id.to_proto(),
1572                    name: "test-channel".to_string()
1573                }]
1574            )
1575        });
1576
1577        let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1578            this.get_channel(channel_id.to_proto(), cx).unwrap()
1579        });
1580        channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1581        channel_b
1582            .condition(&cx_b, |channel, _| {
1583                channel_messages(channel)
1584                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1585            })
1586            .await;
1587
1588        channel_a
1589            .update(&mut cx_a, |channel, cx| {
1590                channel
1591                    .send_message("oh, hi B.".to_string(), cx)
1592                    .unwrap()
1593                    .detach();
1594                let task = channel.send_message("sup".to_string(), cx).unwrap();
1595                assert_eq!(
1596                    channel_messages(channel),
1597                    &[
1598                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1599                        ("user_a".to_string(), "oh, hi B.".to_string(), true),
1600                        ("user_a".to_string(), "sup".to_string(), true)
1601                    ]
1602                );
1603                task
1604            })
1605            .await
1606            .unwrap();
1607
1608        channel_b
1609            .condition(&cx_b, |channel, _| {
1610                channel_messages(channel)
1611                    == [
1612                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1613                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1614                        ("user_a".to_string(), "sup".to_string(), false),
1615                    ]
1616            })
1617            .await;
1618
1619        assert_eq!(
1620            server
1621                .state()
1622                .await
1623                .channel(channel_id)
1624                .unwrap()
1625                .connection_ids
1626                .len(),
1627            2
1628        );
1629        cx_b.update(|_| drop(channel_b));
1630        server
1631            .condition(|state| state.channel(channel_id).unwrap().connection_ids.len() == 1)
1632            .await;
1633
1634        cx_a.update(|_| drop(channel_a));
1635        server
1636            .condition(|state| state.channel(channel_id).is_none())
1637            .await;
1638    }
1639
1640    #[gpui::test]
1641    async fn test_chat_message_validation(mut cx_a: TestAppContext) {
1642        cx_a.foreground().forbid_parking();
1643
1644        let mut server = TestServer::start().await;
1645        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1646
1647        let db = &server.app_state.db;
1648        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1649        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1650        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1651            .await
1652            .unwrap();
1653        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1654            .await
1655            .unwrap();
1656
1657        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1658        channels_a
1659            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1660            .await;
1661        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1662            this.get_channel(channel_id.to_proto(), cx).unwrap()
1663        });
1664
1665        // Messages aren't allowed to be too long.
1666        channel_a
1667            .update(&mut cx_a, |channel, cx| {
1668                let long_body = "this is long.\n".repeat(1024);
1669                channel.send_message(long_body, cx).unwrap()
1670            })
1671            .await
1672            .unwrap_err();
1673
1674        // Messages aren't allowed to be blank.
1675        channel_a.update(&mut cx_a, |channel, cx| {
1676            channel.send_message(String::new(), cx).unwrap_err()
1677        });
1678
1679        // Leading and trailing whitespace are trimmed.
1680        channel_a
1681            .update(&mut cx_a, |channel, cx| {
1682                channel
1683                    .send_message("\n surrounded by whitespace  \n".to_string(), cx)
1684                    .unwrap()
1685            })
1686            .await
1687            .unwrap();
1688        assert_eq!(
1689            db.get_channel_messages(channel_id, 10, None)
1690                .await
1691                .unwrap()
1692                .iter()
1693                .map(|m| &m.body)
1694                .collect::<Vec<_>>(),
1695            &["surrounded by whitespace"]
1696        );
1697    }
1698
1699    #[gpui::test]
1700    async fn test_chat_reconnection(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1701        cx_a.foreground().forbid_parking();
1702
1703        // Connect to a server as 2 clients.
1704        let mut server = TestServer::start().await;
1705        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1706        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1707        let mut status_b = client_b.status();
1708
1709        // Create an org that includes these 2 users.
1710        let db = &server.app_state.db;
1711        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1712        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1713            .await
1714            .unwrap();
1715        db.add_org_member(org_id, current_user_id(&user_store_b, &cx_b), false)
1716            .await
1717            .unwrap();
1718
1719        // Create a channel that includes all the users.
1720        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1721        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1722            .await
1723            .unwrap();
1724        db.add_channel_member(channel_id, current_user_id(&user_store_b, &cx_b), false)
1725            .await
1726            .unwrap();
1727        db.create_channel_message(
1728            channel_id,
1729            current_user_id(&user_store_b, &cx_b),
1730            "hello A, it's B.",
1731            OffsetDateTime::now_utc(),
1732            2,
1733        )
1734        .await
1735        .unwrap();
1736
1737        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1738        channels_a
1739            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1740            .await;
1741
1742        channels_a.read_with(&cx_a, |list, _| {
1743            assert_eq!(
1744                list.available_channels().unwrap(),
1745                &[ChannelDetails {
1746                    id: channel_id.to_proto(),
1747                    name: "test-channel".to_string()
1748                }]
1749            )
1750        });
1751        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1752            this.get_channel(channel_id.to_proto(), cx).unwrap()
1753        });
1754        channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1755        channel_a
1756            .condition(&cx_a, |channel, _| {
1757                channel_messages(channel)
1758                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1759            })
1760            .await;
1761
1762        let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b.clone(), client_b, cx));
1763        channels_b
1764            .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1765            .await;
1766        channels_b.read_with(&cx_b, |list, _| {
1767            assert_eq!(
1768                list.available_channels().unwrap(),
1769                &[ChannelDetails {
1770                    id: channel_id.to_proto(),
1771                    name: "test-channel".to_string()
1772                }]
1773            )
1774        });
1775
1776        let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1777            this.get_channel(channel_id.to_proto(), cx).unwrap()
1778        });
1779        channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1780        channel_b
1781            .condition(&cx_b, |channel, _| {
1782                channel_messages(channel)
1783                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1784            })
1785            .await;
1786
1787        // Disconnect client B, ensuring we can still access its cached channel data.
1788        server.forbid_connections();
1789        server.disconnect_client(current_user_id(&user_store_b, &cx_b));
1790        while !matches!(
1791            status_b.recv().await,
1792            Some(rpc::Status::ReconnectionError { .. })
1793        ) {}
1794
1795        channels_b.read_with(&cx_b, |channels, _| {
1796            assert_eq!(
1797                channels.available_channels().unwrap(),
1798                [ChannelDetails {
1799                    id: channel_id.to_proto(),
1800                    name: "test-channel".to_string()
1801                }]
1802            )
1803        });
1804        channel_b.read_with(&cx_b, |channel, _| {
1805            assert_eq!(
1806                channel_messages(channel),
1807                [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1808            )
1809        });
1810
1811        // Send a message from client B while it is disconnected.
1812        channel_b
1813            .update(&mut cx_b, |channel, cx| {
1814                let task = channel
1815                    .send_message("can you see this?".to_string(), cx)
1816                    .unwrap();
1817                assert_eq!(
1818                    channel_messages(channel),
1819                    &[
1820                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1821                        ("user_b".to_string(), "can you see this?".to_string(), true)
1822                    ]
1823                );
1824                task
1825            })
1826            .await
1827            .unwrap_err();
1828
1829        // Send a message from client A while B is disconnected.
1830        channel_a
1831            .update(&mut cx_a, |channel, cx| {
1832                channel
1833                    .send_message("oh, hi B.".to_string(), cx)
1834                    .unwrap()
1835                    .detach();
1836                let task = channel.send_message("sup".to_string(), cx).unwrap();
1837                assert_eq!(
1838                    channel_messages(channel),
1839                    &[
1840                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1841                        ("user_a".to_string(), "oh, hi B.".to_string(), true),
1842                        ("user_a".to_string(), "sup".to_string(), true)
1843                    ]
1844                );
1845                task
1846            })
1847            .await
1848            .unwrap();
1849
1850        // Give client B a chance to reconnect.
1851        server.allow_connections();
1852        cx_b.foreground().advance_clock(Duration::from_secs(10));
1853
1854        // Verify that B sees the new messages upon reconnection, as well as the message client B
1855        // sent while offline.
1856        channel_b
1857            .condition(&cx_b, |channel, _| {
1858                channel_messages(channel)
1859                    == [
1860                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1861                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1862                        ("user_a".to_string(), "sup".to_string(), false),
1863                        ("user_b".to_string(), "can you see this?".to_string(), false),
1864                    ]
1865            })
1866            .await;
1867
1868        // Ensure client A and B can communicate normally after reconnection.
1869        channel_a
1870            .update(&mut cx_a, |channel, cx| {
1871                channel.send_message("you online?".to_string(), cx).unwrap()
1872            })
1873            .await
1874            .unwrap();
1875        channel_b
1876            .condition(&cx_b, |channel, _| {
1877                channel_messages(channel)
1878                    == [
1879                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1880                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1881                        ("user_a".to_string(), "sup".to_string(), false),
1882                        ("user_b".to_string(), "can you see this?".to_string(), false),
1883                        ("user_a".to_string(), "you online?".to_string(), false),
1884                    ]
1885            })
1886            .await;
1887
1888        channel_b
1889            .update(&mut cx_b, |channel, cx| {
1890                channel.send_message("yep".to_string(), cx).unwrap()
1891            })
1892            .await
1893            .unwrap();
1894        channel_a
1895            .condition(&cx_a, |channel, _| {
1896                channel_messages(channel)
1897                    == [
1898                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1899                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1900                        ("user_a".to_string(), "sup".to_string(), false),
1901                        ("user_b".to_string(), "can you see this?".to_string(), false),
1902                        ("user_a".to_string(), "you online?".to_string(), false),
1903                        ("user_b".to_string(), "yep".to_string(), false),
1904                    ]
1905            })
1906            .await;
1907    }
1908
1909    #[gpui::test]
1910    async fn test_collaborators(
1911        mut cx_a: TestAppContext,
1912        mut cx_b: TestAppContext,
1913        mut cx_c: TestAppContext,
1914    ) {
1915        cx_a.foreground().forbid_parking();
1916        let lang_registry = Arc::new(LanguageRegistry::new());
1917
1918        // Connect to a server as 3 clients.
1919        let mut server = TestServer::start().await;
1920        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1921        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1922        let (_client_c, user_store_c) = server.create_client(&mut cx_c, "user_c").await;
1923
1924        let fs = Arc::new(FakeFs::new());
1925
1926        // Share a worktree as client A.
1927        fs.insert_tree(
1928            "/a",
1929            json!({
1930                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
1931            }),
1932        )
1933        .await;
1934
1935        let worktree_a = Worktree::open_local(
1936            client_a.clone(),
1937            "/a".as_ref(),
1938            fs.clone(),
1939            lang_registry.clone(),
1940            &mut cx_a.to_async(),
1941        )
1942        .await
1943        .unwrap();
1944
1945        user_store_a
1946            .condition(&cx_a, |user_store, _| {
1947                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
1948            })
1949            .await;
1950        user_store_b
1951            .condition(&cx_b, |user_store, _| {
1952                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
1953            })
1954            .await;
1955        user_store_c
1956            .condition(&cx_c, |user_store, _| {
1957                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
1958            })
1959            .await;
1960
1961        let worktree_id = worktree_a
1962            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1963            .await
1964            .unwrap();
1965
1966        let _worktree_b = Worktree::open_remote(
1967            client_b.clone(),
1968            worktree_id,
1969            lang_registry.clone(),
1970            &mut cx_b.to_async(),
1971        )
1972        .await
1973        .unwrap();
1974
1975        user_store_a
1976            .condition(&cx_a, |user_store, _| {
1977                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
1978            })
1979            .await;
1980        user_store_b
1981            .condition(&cx_b, |user_store, _| {
1982                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
1983            })
1984            .await;
1985        user_store_c
1986            .condition(&cx_c, |user_store, _| {
1987                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
1988            })
1989            .await;
1990
1991        cx_a.update(move |_| drop(worktree_a));
1992        user_store_a
1993            .condition(&cx_a, |user_store, _| collaborators(user_store) == vec![])
1994            .await;
1995        user_store_b
1996            .condition(&cx_b, |user_store, _| collaborators(user_store) == vec![])
1997            .await;
1998        user_store_c
1999            .condition(&cx_c, |user_store, _| collaborators(user_store) == vec![])
2000            .await;
2001
2002        fn collaborators(user_store: &UserStore) -> Vec<(&str, Vec<(&str, Vec<&str>)>)> {
2003            user_store
2004                .collaborators()
2005                .iter()
2006                .map(|collaborator| {
2007                    let worktrees = collaborator
2008                        .worktrees
2009                        .iter()
2010                        .map(|w| {
2011                            (
2012                                w.root_name.as_str(),
2013                                w.guests.iter().map(|p| p.github_login.as_str()).collect(),
2014                            )
2015                        })
2016                        .collect();
2017                    (collaborator.user.github_login.as_str(), worktrees)
2018                })
2019                .collect()
2020        }
2021    }
2022
2023    struct TestServer {
2024        peer: Arc<Peer>,
2025        app_state: Arc<AppState>,
2026        server: Arc<Server>,
2027        notifications: mpsc::Receiver<()>,
2028        connection_killers: Arc<Mutex<HashMap<UserId, watch::Sender<Option<()>>>>>,
2029        forbid_connections: Arc<AtomicBool>,
2030        _test_db: TestDb,
2031    }
2032
2033    impl TestServer {
2034        async fn start() -> Self {
2035            let test_db = TestDb::new();
2036            let app_state = Self::build_app_state(&test_db).await;
2037            let peer = Peer::new();
2038            let notifications = mpsc::channel(128);
2039            let server = Server::new(app_state.clone(), peer.clone(), Some(notifications.0));
2040            Self {
2041                peer,
2042                app_state,
2043                server,
2044                notifications: notifications.1,
2045                connection_killers: Default::default(),
2046                forbid_connections: Default::default(),
2047                _test_db: test_db,
2048            }
2049        }
2050
2051        async fn create_client(
2052            &mut self,
2053            cx: &mut TestAppContext,
2054            name: &str,
2055        ) -> (Arc<Client>, ModelHandle<UserStore>) {
2056            let user_id = self.app_state.db.create_user(name, false).await.unwrap();
2057            let client_name = name.to_string();
2058            let mut client = Client::new();
2059            let server = self.server.clone();
2060            let connection_killers = self.connection_killers.clone();
2061            let forbid_connections = self.forbid_connections.clone();
2062            Arc::get_mut(&mut client)
2063                .unwrap()
2064                .override_authenticate(move |cx| {
2065                    cx.spawn(|_| async move {
2066                        let access_token = "the-token".to_string();
2067                        Ok(Credentials {
2068                            user_id: user_id.0 as u64,
2069                            access_token,
2070                        })
2071                    })
2072                })
2073                .override_establish_connection(move |credentials, cx| {
2074                    assert_eq!(credentials.user_id, user_id.0 as u64);
2075                    assert_eq!(credentials.access_token, "the-token");
2076
2077                    let server = server.clone();
2078                    let connection_killers = connection_killers.clone();
2079                    let forbid_connections = forbid_connections.clone();
2080                    let client_name = client_name.clone();
2081                    cx.spawn(move |cx| async move {
2082                        if forbid_connections.load(SeqCst) {
2083                            Err(EstablishConnectionError::other(anyhow!(
2084                                "server is forbidding connections"
2085                            )))
2086                        } else {
2087                            let (client_conn, server_conn, kill_conn) = Connection::in_memory();
2088                            connection_killers.lock().insert(user_id, kill_conn);
2089                            cx.background()
2090                                .spawn(server.handle_connection(server_conn, client_name, user_id))
2091                                .detach();
2092                            Ok(client_conn)
2093                        }
2094                    })
2095                });
2096
2097            let http = FakeHttpClient::new(|_| async move { Ok(surf::http::Response::new(404)) });
2098            client
2099                .authenticate_and_connect(&cx.to_async())
2100                .await
2101                .unwrap();
2102
2103            let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http, cx));
2104            let mut authed_user =
2105                user_store.read_with(cx, |user_store, _| user_store.watch_current_user());
2106            while authed_user.recv().await.unwrap().is_none() {}
2107
2108            (client, user_store)
2109        }
2110
2111        fn disconnect_client(&self, user_id: UserId) {
2112            if let Some(mut kill_conn) = self.connection_killers.lock().remove(&user_id) {
2113                let _ = kill_conn.try_send(Some(()));
2114            }
2115        }
2116
2117        fn forbid_connections(&self) {
2118            self.forbid_connections.store(true, SeqCst);
2119        }
2120
2121        fn allow_connections(&self) {
2122            self.forbid_connections.store(false, SeqCst);
2123        }
2124
2125        async fn build_app_state(test_db: &TestDb) -> Arc<AppState> {
2126            let mut config = Config::default();
2127            config.session_secret = "a".repeat(32);
2128            config.database_url = test_db.url.clone();
2129            let github_client = github::AppClient::test();
2130            Arc::new(AppState {
2131                db: test_db.db().clone(),
2132                handlebars: Default::default(),
2133                auth_client: auth::build_client("", ""),
2134                repo_client: github::RepoClient::test(&github_client),
2135                github_client,
2136                config,
2137            })
2138        }
2139
2140        async fn state<'a>(&'a self) -> RwLockReadGuard<'a, Store> {
2141            self.server.store.read().await
2142        }
2143
2144        async fn condition<F>(&mut self, mut predicate: F)
2145        where
2146            F: FnMut(&Store) -> bool,
2147        {
2148            async_std::future::timeout(Duration::from_millis(500), async {
2149                while !(predicate)(&*self.server.store.read().await) {
2150                    self.notifications.recv().await;
2151                }
2152            })
2153            .await
2154            .expect("condition timed out");
2155        }
2156    }
2157
2158    impl Drop for TestServer {
2159        fn drop(&mut self) {
2160            task::block_on(self.peer.reset());
2161        }
2162    }
2163
2164    fn current_user_id(user_store: &ModelHandle<UserStore>, cx: &TestAppContext) -> UserId {
2165        UserId::from_proto(
2166            user_store.read_with(cx, |user_store, _| user_store.current_user().unwrap().id),
2167        )
2168    }
2169
2170    fn channel_messages(channel: &Channel) -> Vec<(String, String, bool)> {
2171        channel
2172            .messages()
2173            .cursor::<(), ()>()
2174            .map(|m| {
2175                (
2176                    m.sender.github_login.clone(),
2177                    m.body.clone(),
2178                    m.is_pending(),
2179                )
2180            })
2181            .collect()
2182    }
2183
2184    struct EmptyView;
2185
2186    impl gpui::Entity for EmptyView {
2187        type Event = ();
2188    }
2189
2190    impl gpui::View for EmptyView {
2191        fn ui_name() -> &'static str {
2192            "empty view"
2193        }
2194
2195        fn render(&mut self, _: &mut gpui::RenderContext<Self>) -> gpui::ElementBox {
2196            gpui::Element::boxed(gpui::elements::Empty)
2197        }
2198    }
2199}