1mod store;
   2
   3use super::{
   4    auth::process_auth_header,
   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 rpc::{
  14    proto::{self, AnyTypedEnvelope, EnvelopedMessage},
  15    Connection, ConnectionId, Peer, TypedEnvelope,
  16};
  17use sha1::{Digest as _, Sha1};
  18use std::{
  19    any::TypeId,
  20    collections::{HashMap, HashSet},
  21    future::Future,
  22    mem,
  23    sync::Arc,
  24    time::Instant,
  25};
  26use store::{JoinedWorktree, Store, Worktree};
  27use surf::StatusCode;
  28use tide::log;
  29use tide::{
  30    http::headers::{HeaderName, CONNECTION, UPGRADE},
  31    Request, Response,
  32};
  33use time::OffsetDateTime;
  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").get(move |request: Request<Arc<AppState>>| {
 889        let server = server.clone();
 890        async move {
 891            const WEBSOCKET_GUID: &str = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 892
 893            let connection_upgrade = header_contains_ignore_case(&request, CONNECTION, "upgrade");
 894            let upgrade_to_websocket = header_contains_ignore_case(&request, UPGRADE, "websocket");
 895            let upgrade_requested = connection_upgrade && upgrade_to_websocket;
 896            let client_protocol_version: Option<u32> = request
 897                .header("X-Zed-Protocol-Version")
 898                .and_then(|v| v.as_str().parse().ok());
 899
 900            if !upgrade_requested || client_protocol_version != Some(rpc::PROTOCOL_VERSION) {
 901                return Ok(Response::new(StatusCode::UpgradeRequired));
 902            }
 903
 904            let header = match request.header("Sec-Websocket-Key") {
 905                Some(h) => h.as_str(),
 906                None => return Err(anyhow!("expected sec-websocket-key"))?,
 907            };
 908
 909            let user_id = process_auth_header(&request).await?;
 910
 911            let mut response = Response::new(StatusCode::SwitchingProtocols);
 912            response.insert_header(UPGRADE, "websocket");
 913            response.insert_header(CONNECTION, "Upgrade");
 914            let hash = Sha1::new().chain(header).chain(WEBSOCKET_GUID).finalize();
 915            response.insert_header("Sec-Websocket-Accept", base64::encode(&hash[..]));
 916            response.insert_header("Sec-Websocket-Version", "13");
 917
 918            let http_res: &mut tide::http::Response = response.as_mut();
 919            let upgrade_receiver = http_res.recv_upgrade().await;
 920            let addr = request.remote().unwrap_or("unknown").to_string();
 921            task::spawn(async move {
 922                if let Some(stream) = upgrade_receiver.await {
 923                    server
 924                        .handle_connection(
 925                            Connection::new(
 926                                WebSocketStream::from_raw_socket(stream, Role::Server, None).await,
 927                            ),
 928                            addr,
 929                            user_id,
 930                        )
 931                        .await;
 932                }
 933            });
 934
 935            Ok(response)
 936        }
 937    });
 938}
 939
 940fn header_contains_ignore_case<T>(
 941    request: &tide::Request<T>,
 942    header_name: HeaderName,
 943    value: &str,
 944) -> bool {
 945    request
 946        .header(header_name)
 947        .map(|h| {
 948            h.as_str()
 949                .split(',')
 950                .any(|s| s.trim().eq_ignore_ascii_case(value.trim()))
 951        })
 952        .unwrap_or(false)
 953}
 954
 955#[cfg(test)]
 956mod tests {
 957    use super::*;
 958    use crate::{
 959        auth,
 960        db::{tests::TestDb, UserId},
 961        github, AppState, Config,
 962    };
 963    use ::rpc::Peer;
 964    use async_std::{sync::RwLockReadGuard, task};
 965    use gpui::{ModelHandle, TestAppContext};
 966    use parking_lot::Mutex;
 967    use postage::{mpsc, watch};
 968    use serde_json::json;
 969    use sqlx::types::time::OffsetDateTime;
 970    use std::{
 971        path::Path,
 972        sync::{
 973            atomic::{AtomicBool, Ordering::SeqCst},
 974            Arc,
 975        },
 976        time::Duration,
 977    };
 978    use zed::{
 979        buffer::LanguageRegistry,
 980        channel::{Channel, ChannelDetails, ChannelList},
 981        editor::{Editor, EditorSettings, Insert},
 982        fs::{FakeFs, Fs as _},
 983        people_panel::JoinWorktree,
 984        project::{ProjectPath, Worktree},
 985        rpc::{self, Client, Credentials, EstablishConnectionError},
 986        test::FakeHttpClient,
 987        user::UserStore,
 988        workspace::Workspace,
 989    };
 990
 991    #[gpui::test]
 992    async fn test_share_worktree(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
 993        let (window_b, _) = cx_b.add_window(|_| EmptyView);
 994        let lang_registry = Arc::new(LanguageRegistry::new());
 995
 996        // Connect to a server as 2 clients.
 997        let mut server = TestServer::start().await;
 998        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
 999        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1000
1001        cx_a.foreground().forbid_parking();
1002
1003        // Share a local worktree as client A
1004        let fs = Arc::new(FakeFs::new());
1005        fs.insert_tree(
1006            "/a",
1007            json!({
1008                ".zed.toml": r#"collaborators = ["user_b"]"#,
1009                "a.txt": "a-contents",
1010                "b.txt": "b-contents",
1011            }),
1012        )
1013        .await;
1014        let worktree_a = Worktree::open_local(
1015            client_a.clone(),
1016            "/a".as_ref(),
1017            fs,
1018            lang_registry.clone(),
1019            &mut cx_a.to_async(),
1020        )
1021        .await
1022        .unwrap();
1023        worktree_a
1024            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1025            .await;
1026        let worktree_id = worktree_a
1027            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1028            .await
1029            .unwrap();
1030
1031        // Join that worktree as client B, and see that a guest has joined as client A.
1032        let worktree_b = Worktree::open_remote(
1033            client_b.clone(),
1034            worktree_id,
1035            lang_registry.clone(),
1036            &mut cx_b.to_async(),
1037        )
1038        .await
1039        .unwrap();
1040        let replica_id_b = worktree_b.read_with(&cx_b, |tree, _| tree.replica_id());
1041        worktree_a
1042            .condition(&cx_a, |tree, _| {
1043                tree.peers()
1044                    .values()
1045                    .any(|replica_id| *replica_id == replica_id_b)
1046            })
1047            .await;
1048
1049        // Open the same file as client B and client A.
1050        let buffer_b = worktree_b
1051            .update(&mut cx_b, |worktree, cx| worktree.open_buffer("b.txt", cx))
1052            .await
1053            .unwrap();
1054        buffer_b.read_with(&cx_b, |buf, _| assert_eq!(buf.text(), "b-contents"));
1055        worktree_a.read_with(&cx_a, |tree, cx| assert!(tree.has_open_buffer("b.txt", cx)));
1056        let buffer_a = worktree_a
1057            .update(&mut cx_a, |tree, cx| tree.open_buffer("b.txt", cx))
1058            .await
1059            .unwrap();
1060
1061        // Create a selection set as client B and see that selection set as client A.
1062        let editor_b = cx_b.add_view(window_b, |cx| {
1063            Editor::for_buffer(buffer_b, |cx| EditorSettings::test(cx), cx)
1064        });
1065        buffer_a
1066            .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 1)
1067            .await;
1068
1069        // Edit the buffer as client B and see that edit as client A.
1070        editor_b.update(&mut cx_b, |editor, cx| {
1071            editor.insert(&Insert("ok, ".into()), cx)
1072        });
1073        buffer_a
1074            .condition(&cx_a, |buffer, _| buffer.text() == "ok, b-contents")
1075            .await;
1076
1077        // Remove the selection set as client B, see those selections disappear as client A.
1078        cx_b.update(move |_| drop(editor_b));
1079        buffer_a
1080            .condition(&cx_a, |buffer, _| buffer.selection_sets().count() == 0)
1081            .await;
1082
1083        // Close the buffer as client A, see that the buffer is closed.
1084        cx_a.update(move |_| drop(buffer_a));
1085        worktree_a
1086            .condition(&cx_a, |tree, cx| !tree.has_open_buffer("b.txt", cx))
1087            .await;
1088
1089        // Dropping the worktree removes client B from client A's peers.
1090        cx_b.update(move |_| drop(worktree_b));
1091        worktree_a
1092            .condition(&cx_a, |tree, _| tree.peers().is_empty())
1093            .await;
1094    }
1095
1096    #[gpui::test]
1097    async fn test_unshare_worktree(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1098        cx_b.update(zed::workspace::init);
1099        let lang_registry = Arc::new(LanguageRegistry::new());
1100
1101        // Connect to a server as 2 clients.
1102        let mut server = TestServer::start().await;
1103        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1104        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1105        let app_state_b = zed::AppState {
1106            rpc: client_b,
1107            user_store: user_store_b,
1108            ..Arc::try_unwrap(cx_b.update(zed::test::test_app_state))
1109                .ok()
1110                .unwrap()
1111        };
1112
1113        cx_a.foreground().forbid_parking();
1114
1115        // Share a local worktree as client A
1116        let fs = Arc::new(FakeFs::new());
1117        fs.insert_tree(
1118            "/a",
1119            json!({
1120                ".zed.toml": r#"collaborators = ["user_b"]"#,
1121                "a.txt": "a-contents",
1122                "b.txt": "b-contents",
1123            }),
1124        )
1125        .await;
1126        let worktree_a = Worktree::open_local(
1127            client_a.clone(),
1128            "/a".as_ref(),
1129            fs,
1130            lang_registry.clone(),
1131            &mut cx_a.to_async(),
1132        )
1133        .await
1134        .unwrap();
1135        worktree_a
1136            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1137            .await;
1138
1139        let remote_worktree_id = worktree_a
1140            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1141            .await
1142            .unwrap();
1143
1144        let (window_b, workspace_b) = cx_b.add_window(|cx| Workspace::new(&app_state_b, cx));
1145        cx_b.update(|cx| {
1146            cx.dispatch_action(
1147                window_b,
1148                vec![workspace_b.id()],
1149                &JoinWorktree(remote_worktree_id),
1150            );
1151        });
1152        workspace_b
1153            .condition(&cx_b, |workspace, cx| workspace.worktrees(cx).len() == 1)
1154            .await;
1155
1156        let local_worktree_id_b = workspace_b.read_with(&cx_b, |workspace, cx| {
1157            let active_pane = workspace.active_pane().read(cx);
1158            assert!(active_pane.active_item().is_none());
1159            workspace.worktrees(cx).first().unwrap().id()
1160        });
1161        workspace_b
1162            .update(&mut cx_b, |workspace, cx| {
1163                workspace.open_entry(
1164                    ProjectPath {
1165                        worktree_id: local_worktree_id_b,
1166                        path: Path::new("a.txt").into(),
1167                    },
1168                    cx,
1169                )
1170            })
1171            .unwrap()
1172            .await;
1173        workspace_b.read_with(&cx_b, |workspace, cx| {
1174            let active_pane = workspace.active_pane().read(cx);
1175            assert!(active_pane.active_item().is_some());
1176        });
1177
1178        worktree_a.update(&mut cx_a, |tree, cx| {
1179            tree.as_local_mut().unwrap().unshare(cx);
1180        });
1181        workspace_b
1182            .condition(&cx_b, |workspace, cx| workspace.worktrees(cx).len() == 0)
1183            .await;
1184        workspace_b.read_with(&cx_b, |workspace, cx| {
1185            let active_pane = workspace.active_pane().read(cx);
1186            assert!(active_pane.active_item().is_none());
1187        });
1188    }
1189
1190    #[gpui::test]
1191    async fn test_propagate_saves_and_fs_changes_in_shared_worktree(
1192        mut cx_a: TestAppContext,
1193        mut cx_b: TestAppContext,
1194        mut cx_c: TestAppContext,
1195    ) {
1196        cx_a.foreground().forbid_parking();
1197        let lang_registry = Arc::new(LanguageRegistry::new());
1198
1199        // Connect to a server as 3 clients.
1200        let mut server = TestServer::start().await;
1201        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1202        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1203        let (client_c, _) = server.create_client(&mut cx_c, "user_c").await;
1204
1205        let fs = Arc::new(FakeFs::new());
1206
1207        // Share a worktree as client A.
1208        fs.insert_tree(
1209            "/a",
1210            json!({
1211                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
1212                "file1": "",
1213                "file2": ""
1214            }),
1215        )
1216        .await;
1217
1218        let worktree_a = Worktree::open_local(
1219            client_a.clone(),
1220            "/a".as_ref(),
1221            fs.clone(),
1222            lang_registry.clone(),
1223            &mut cx_a.to_async(),
1224        )
1225        .await
1226        .unwrap();
1227        worktree_a
1228            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1229            .await;
1230        let worktree_id = worktree_a
1231            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1232            .await
1233            .unwrap();
1234
1235        // Join that worktree as clients B and C.
1236        let worktree_b = Worktree::open_remote(
1237            client_b.clone(),
1238            worktree_id,
1239            lang_registry.clone(),
1240            &mut cx_b.to_async(),
1241        )
1242        .await
1243        .unwrap();
1244        let worktree_c = Worktree::open_remote(
1245            client_c.clone(),
1246            worktree_id,
1247            lang_registry.clone(),
1248            &mut cx_c.to_async(),
1249        )
1250        .await
1251        .unwrap();
1252
1253        // Open and edit a buffer as both guests B and C.
1254        let buffer_b = worktree_b
1255            .update(&mut cx_b, |tree, cx| tree.open_buffer("file1", cx))
1256            .await
1257            .unwrap();
1258        let buffer_c = worktree_c
1259            .update(&mut cx_c, |tree, cx| tree.open_buffer("file1", cx))
1260            .await
1261            .unwrap();
1262        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "i-am-b, ", cx));
1263        buffer_c.update(&mut cx_c, |buf, cx| buf.edit([0..0], "i-am-c, ", cx));
1264
1265        // Open and edit that buffer as the host.
1266        let buffer_a = worktree_a
1267            .update(&mut cx_a, |tree, cx| tree.open_buffer("file1", cx))
1268            .await
1269            .unwrap();
1270
1271        buffer_a
1272            .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, ")
1273            .await;
1274        buffer_a.update(&mut cx_a, |buf, cx| {
1275            buf.edit([buf.len()..buf.len()], "i-am-a", cx)
1276        });
1277
1278        // Wait for edits to propagate
1279        buffer_a
1280            .condition(&mut cx_a, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1281            .await;
1282        buffer_b
1283            .condition(&mut cx_b, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1284            .await;
1285        buffer_c
1286            .condition(&mut cx_c, |buf, _| buf.text() == "i-am-c, i-am-b, i-am-a")
1287            .await;
1288
1289        // Edit the buffer as the host and concurrently save as guest B.
1290        let save_b = buffer_b.update(&mut cx_b, |buf, cx| buf.save(cx).unwrap());
1291        buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "hi-a, ", cx));
1292        save_b.await.unwrap();
1293        assert_eq!(
1294            fs.load("/a/file1".as_ref()).await.unwrap(),
1295            "hi-a, i-am-c, i-am-b, i-am-a"
1296        );
1297        buffer_a.read_with(&cx_a, |buf, _| assert!(!buf.is_dirty()));
1298        buffer_b.read_with(&cx_b, |buf, _| assert!(!buf.is_dirty()));
1299        buffer_c.condition(&cx_c, |buf, _| !buf.is_dirty()).await;
1300
1301        // Make changes on host's file system, see those changes on the guests.
1302        fs.rename("/a/file2".as_ref(), "/a/file3".as_ref())
1303            .await
1304            .unwrap();
1305        fs.insert_file(Path::new("/a/file4"), "4".into())
1306            .await
1307            .unwrap();
1308
1309        worktree_b
1310            .condition(&cx_b, |tree, _| tree.file_count() == 4)
1311            .await;
1312        worktree_c
1313            .condition(&cx_c, |tree, _| tree.file_count() == 4)
1314            .await;
1315        worktree_b.read_with(&cx_b, |tree, _| {
1316            assert_eq!(
1317                tree.paths()
1318                    .map(|p| p.to_string_lossy())
1319                    .collect::<Vec<_>>(),
1320                &[".zed.toml", "file1", "file3", "file4"]
1321            )
1322        });
1323        worktree_c.read_with(&cx_c, |tree, _| {
1324            assert_eq!(
1325                tree.paths()
1326                    .map(|p| p.to_string_lossy())
1327                    .collect::<Vec<_>>(),
1328                &[".zed.toml", "file1", "file3", "file4"]
1329            )
1330        });
1331    }
1332
1333    #[gpui::test]
1334    async fn test_buffer_conflict_after_save(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1335        cx_a.foreground().forbid_parking();
1336        let lang_registry = Arc::new(LanguageRegistry::new());
1337
1338        // Connect to a server as 2 clients.
1339        let mut server = TestServer::start().await;
1340        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1341        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1342
1343        // Share a local worktree as client A
1344        let fs = Arc::new(FakeFs::new());
1345        fs.insert_tree(
1346            "/dir",
1347            json!({
1348                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
1349                "a.txt": "a-contents",
1350            }),
1351        )
1352        .await;
1353
1354        let worktree_a = Worktree::open_local(
1355            client_a.clone(),
1356            "/dir".as_ref(),
1357            fs,
1358            lang_registry.clone(),
1359            &mut cx_a.to_async(),
1360        )
1361        .await
1362        .unwrap();
1363        worktree_a
1364            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1365            .await;
1366        let worktree_id = worktree_a
1367            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1368            .await
1369            .unwrap();
1370
1371        // Join that worktree as client B, and see that a guest has joined as client A.
1372        let worktree_b = Worktree::open_remote(
1373            client_b.clone(),
1374            worktree_id,
1375            lang_registry.clone(),
1376            &mut cx_b.to_async(),
1377        )
1378        .await
1379        .unwrap();
1380
1381        let buffer_b = worktree_b
1382            .update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx))
1383            .await
1384            .unwrap();
1385        let mtime = buffer_b.read_with(&cx_b, |buf, _| buf.file().unwrap().mtime());
1386
1387        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "world ", cx));
1388        buffer_b.read_with(&cx_b, |buf, _| {
1389            assert!(buf.is_dirty());
1390            assert!(!buf.has_conflict());
1391        });
1392
1393        buffer_b
1394            .update(&mut cx_b, |buf, cx| buf.save(cx))
1395            .unwrap()
1396            .await
1397            .unwrap();
1398        worktree_b
1399            .condition(&cx_b, |_, cx| {
1400                buffer_b.read(cx).file().unwrap().mtime() != mtime
1401            })
1402            .await;
1403        buffer_b.read_with(&cx_b, |buf, _| {
1404            assert!(!buf.is_dirty());
1405            assert!(!buf.has_conflict());
1406        });
1407
1408        buffer_b.update(&mut cx_b, |buf, cx| buf.edit([0..0], "hello ", cx));
1409        buffer_b.read_with(&cx_b, |buf, _| {
1410            assert!(buf.is_dirty());
1411            assert!(!buf.has_conflict());
1412        });
1413    }
1414
1415    #[gpui::test]
1416    async fn test_editing_while_guest_opens_buffer(
1417        mut cx_a: TestAppContext,
1418        mut cx_b: TestAppContext,
1419    ) {
1420        cx_a.foreground().forbid_parking();
1421        let lang_registry = Arc::new(LanguageRegistry::new());
1422
1423        // Connect to a server as 2 clients.
1424        let mut server = TestServer::start().await;
1425        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1426        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1427
1428        // Share a local worktree as client A
1429        let fs = Arc::new(FakeFs::new());
1430        fs.insert_tree(
1431            "/dir",
1432            json!({
1433                ".zed.toml": r#"collaborators = ["user_b"]"#,
1434                "a.txt": "a-contents",
1435            }),
1436        )
1437        .await;
1438        let worktree_a = Worktree::open_local(
1439            client_a.clone(),
1440            "/dir".as_ref(),
1441            fs,
1442            lang_registry.clone(),
1443            &mut cx_a.to_async(),
1444        )
1445        .await
1446        .unwrap();
1447        worktree_a
1448            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1449            .await;
1450        let worktree_id = worktree_a
1451            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1452            .await
1453            .unwrap();
1454
1455        // Join that worktree as client B, and see that a guest has joined as client A.
1456        let worktree_b = Worktree::open_remote(
1457            client_b.clone(),
1458            worktree_id,
1459            lang_registry.clone(),
1460            &mut cx_b.to_async(),
1461        )
1462        .await
1463        .unwrap();
1464
1465        let buffer_a = worktree_a
1466            .update(&mut cx_a, |tree, cx| tree.open_buffer("a.txt", cx))
1467            .await
1468            .unwrap();
1469        let buffer_b = cx_b
1470            .background()
1471            .spawn(worktree_b.update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx)));
1472
1473        task::yield_now().await;
1474        buffer_a.update(&mut cx_a, |buf, cx| buf.edit([0..0], "z", cx));
1475
1476        let text = buffer_a.read_with(&cx_a, |buf, _| buf.text());
1477        let buffer_b = buffer_b.await.unwrap();
1478        buffer_b.condition(&cx_b, |buf, _| buf.text() == text).await;
1479    }
1480
1481    #[gpui::test]
1482    async fn test_leaving_worktree_while_opening_buffer(
1483        mut cx_a: TestAppContext,
1484        mut cx_b: TestAppContext,
1485    ) {
1486        cx_a.foreground().forbid_parking();
1487        let lang_registry = Arc::new(LanguageRegistry::new());
1488
1489        // Connect to a server as 2 clients.
1490        let mut server = TestServer::start().await;
1491        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1492        let (client_b, _) = server.create_client(&mut cx_b, "user_b").await;
1493
1494        // Share a local worktree as client A
1495        let fs = Arc::new(FakeFs::new());
1496        fs.insert_tree(
1497            "/dir",
1498            json!({
1499                ".zed.toml": r#"collaborators = ["user_b"]"#,
1500                "a.txt": "a-contents",
1501            }),
1502        )
1503        .await;
1504        let worktree_a = Worktree::open_local(
1505            client_a.clone(),
1506            "/dir".as_ref(),
1507            fs,
1508            lang_registry.clone(),
1509            &mut cx_a.to_async(),
1510        )
1511        .await
1512        .unwrap();
1513        worktree_a
1514            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1515            .await;
1516        let worktree_id = worktree_a
1517            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1518            .await
1519            .unwrap();
1520
1521        // Join that worktree as client B, and see that a guest has joined as client A.
1522        let worktree_b = Worktree::open_remote(
1523            client_b.clone(),
1524            worktree_id,
1525            lang_registry.clone(),
1526            &mut cx_b.to_async(),
1527        )
1528        .await
1529        .unwrap();
1530        worktree_a
1531            .condition(&cx_a, |tree, _| tree.peers().len() == 1)
1532            .await;
1533
1534        let buffer_b = cx_b
1535            .background()
1536            .spawn(worktree_b.update(&mut cx_b, |worktree, cx| worktree.open_buffer("a.txt", cx)));
1537        cx_b.update(|_| drop(worktree_b));
1538        drop(buffer_b);
1539        worktree_a
1540            .condition(&cx_a, |tree, _| tree.peers().len() == 0)
1541            .await;
1542    }
1543
1544    #[gpui::test]
1545    async fn test_peer_disconnection(mut cx_a: TestAppContext, cx_b: TestAppContext) {
1546        cx_a.foreground().forbid_parking();
1547        let lang_registry = Arc::new(LanguageRegistry::new());
1548
1549        // Connect to a server as 2 clients.
1550        let mut server = TestServer::start().await;
1551        let (client_a, _) = server.create_client(&mut cx_a, "user_a").await;
1552        let (client_b, _) = server.create_client(&mut cx_a, "user_b").await;
1553
1554        // Share a local worktree as client A
1555        let fs = Arc::new(FakeFs::new());
1556        fs.insert_tree(
1557            "/a",
1558            json!({
1559                ".zed.toml": r#"collaborators = ["user_b"]"#,
1560                "a.txt": "a-contents",
1561                "b.txt": "b-contents",
1562            }),
1563        )
1564        .await;
1565        let worktree_a = Worktree::open_local(
1566            client_a.clone(),
1567            "/a".as_ref(),
1568            fs,
1569            lang_registry.clone(),
1570            &mut cx_a.to_async(),
1571        )
1572        .await
1573        .unwrap();
1574        worktree_a
1575            .read_with(&cx_a, |tree, _| tree.as_local().unwrap().scan_complete())
1576            .await;
1577        let worktree_id = worktree_a
1578            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
1579            .await
1580            .unwrap();
1581
1582        // Join that worktree as client B, and see that a guest has joined as client A.
1583        let _worktree_b = Worktree::open_remote(
1584            client_b.clone(),
1585            worktree_id,
1586            lang_registry.clone(),
1587            &mut cx_b.to_async(),
1588        )
1589        .await
1590        .unwrap();
1591        worktree_a
1592            .condition(&cx_a, |tree, _| tree.peers().len() == 1)
1593            .await;
1594
1595        // Drop client B's connection and ensure client A observes client B leaving the worktree.
1596        client_b.disconnect(&cx_b.to_async()).await.unwrap();
1597        worktree_a
1598            .condition(&cx_a, |tree, _| tree.peers().len() == 0)
1599            .await;
1600    }
1601
1602    #[gpui::test]
1603    async fn test_basic_chat(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1604        cx_a.foreground().forbid_parking();
1605
1606        // Connect to a server as 2 clients.
1607        let mut server = TestServer::start().await;
1608        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1609        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1610
1611        // Create an org that includes these 2 users.
1612        let db = &server.app_state.db;
1613        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1614        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1615            .await
1616            .unwrap();
1617        db.add_org_member(org_id, current_user_id(&user_store_b, &cx_b), false)
1618            .await
1619            .unwrap();
1620
1621        // Create a channel that includes all the users.
1622        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1623        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1624            .await
1625            .unwrap();
1626        db.add_channel_member(channel_id, current_user_id(&user_store_b, &cx_b), false)
1627            .await
1628            .unwrap();
1629        db.create_channel_message(
1630            channel_id,
1631            current_user_id(&user_store_b, &cx_b),
1632            "hello A, it's B.",
1633            OffsetDateTime::now_utc(),
1634            1,
1635        )
1636        .await
1637        .unwrap();
1638
1639        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1640        channels_a
1641            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1642            .await;
1643        channels_a.read_with(&cx_a, |list, _| {
1644            assert_eq!(
1645                list.available_channels().unwrap(),
1646                &[ChannelDetails {
1647                    id: channel_id.to_proto(),
1648                    name: "test-channel".to_string()
1649                }]
1650            )
1651        });
1652        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1653            this.get_channel(channel_id.to_proto(), cx).unwrap()
1654        });
1655        channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1656        channel_a
1657            .condition(&cx_a, |channel, _| {
1658                channel_messages(channel)
1659                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1660            })
1661            .await;
1662
1663        let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b, client_b, cx));
1664        channels_b
1665            .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1666            .await;
1667        channels_b.read_with(&cx_b, |list, _| {
1668            assert_eq!(
1669                list.available_channels().unwrap(),
1670                &[ChannelDetails {
1671                    id: channel_id.to_proto(),
1672                    name: "test-channel".to_string()
1673                }]
1674            )
1675        });
1676
1677        let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1678            this.get_channel(channel_id.to_proto(), cx).unwrap()
1679        });
1680        channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1681        channel_b
1682            .condition(&cx_b, |channel, _| {
1683                channel_messages(channel)
1684                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1685            })
1686            .await;
1687
1688        channel_a
1689            .update(&mut cx_a, |channel, cx| {
1690                channel
1691                    .send_message("oh, hi B.".to_string(), cx)
1692                    .unwrap()
1693                    .detach();
1694                let task = channel.send_message("sup".to_string(), cx).unwrap();
1695                assert_eq!(
1696                    channel_messages(channel),
1697                    &[
1698                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1699                        ("user_a".to_string(), "oh, hi B.".to_string(), true),
1700                        ("user_a".to_string(), "sup".to_string(), true)
1701                    ]
1702                );
1703                task
1704            })
1705            .await
1706            .unwrap();
1707
1708        channel_b
1709            .condition(&cx_b, |channel, _| {
1710                channel_messages(channel)
1711                    == [
1712                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1713                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1714                        ("user_a".to_string(), "sup".to_string(), false),
1715                    ]
1716            })
1717            .await;
1718
1719        assert_eq!(
1720            server
1721                .state()
1722                .await
1723                .channel(channel_id)
1724                .unwrap()
1725                .connection_ids
1726                .len(),
1727            2
1728        );
1729        cx_b.update(|_| drop(channel_b));
1730        server
1731            .condition(|state| state.channel(channel_id).unwrap().connection_ids.len() == 1)
1732            .await;
1733
1734        cx_a.update(|_| drop(channel_a));
1735        server
1736            .condition(|state| state.channel(channel_id).is_none())
1737            .await;
1738    }
1739
1740    #[gpui::test]
1741    async fn test_chat_message_validation(mut cx_a: TestAppContext) {
1742        cx_a.foreground().forbid_parking();
1743
1744        let mut server = TestServer::start().await;
1745        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1746
1747        let db = &server.app_state.db;
1748        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1749        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1750        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1751            .await
1752            .unwrap();
1753        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1754            .await
1755            .unwrap();
1756
1757        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1758        channels_a
1759            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1760            .await;
1761        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1762            this.get_channel(channel_id.to_proto(), cx).unwrap()
1763        });
1764
1765        // Messages aren't allowed to be too long.
1766        channel_a
1767            .update(&mut cx_a, |channel, cx| {
1768                let long_body = "this is long.\n".repeat(1024);
1769                channel.send_message(long_body, cx).unwrap()
1770            })
1771            .await
1772            .unwrap_err();
1773
1774        // Messages aren't allowed to be blank.
1775        channel_a.update(&mut cx_a, |channel, cx| {
1776            channel.send_message(String::new(), cx).unwrap_err()
1777        });
1778
1779        // Leading and trailing whitespace are trimmed.
1780        channel_a
1781            .update(&mut cx_a, |channel, cx| {
1782                channel
1783                    .send_message("\n surrounded by whitespace  \n".to_string(), cx)
1784                    .unwrap()
1785            })
1786            .await
1787            .unwrap();
1788        assert_eq!(
1789            db.get_channel_messages(channel_id, 10, None)
1790                .await
1791                .unwrap()
1792                .iter()
1793                .map(|m| &m.body)
1794                .collect::<Vec<_>>(),
1795            &["surrounded by whitespace"]
1796        );
1797    }
1798
1799    #[gpui::test]
1800    async fn test_chat_reconnection(mut cx_a: TestAppContext, mut cx_b: TestAppContext) {
1801        cx_a.foreground().forbid_parking();
1802
1803        // Connect to a server as 2 clients.
1804        let mut server = TestServer::start().await;
1805        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
1806        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
1807        let mut status_b = client_b.status();
1808
1809        // Create an org that includes these 2 users.
1810        let db = &server.app_state.db;
1811        let org_id = db.create_org("Test Org", "test-org").await.unwrap();
1812        db.add_org_member(org_id, current_user_id(&user_store_a, &cx_a), false)
1813            .await
1814            .unwrap();
1815        db.add_org_member(org_id, current_user_id(&user_store_b, &cx_b), false)
1816            .await
1817            .unwrap();
1818
1819        // Create a channel that includes all the users.
1820        let channel_id = db.create_org_channel(org_id, "test-channel").await.unwrap();
1821        db.add_channel_member(channel_id, current_user_id(&user_store_a, &cx_a), false)
1822            .await
1823            .unwrap();
1824        db.add_channel_member(channel_id, current_user_id(&user_store_b, &cx_b), false)
1825            .await
1826            .unwrap();
1827        db.create_channel_message(
1828            channel_id,
1829            current_user_id(&user_store_b, &cx_b),
1830            "hello A, it's B.",
1831            OffsetDateTime::now_utc(),
1832            2,
1833        )
1834        .await
1835        .unwrap();
1836
1837        let channels_a = cx_a.add_model(|cx| ChannelList::new(user_store_a, client_a, cx));
1838        channels_a
1839            .condition(&mut cx_a, |list, _| list.available_channels().is_some())
1840            .await;
1841
1842        channels_a.read_with(&cx_a, |list, _| {
1843            assert_eq!(
1844                list.available_channels().unwrap(),
1845                &[ChannelDetails {
1846                    id: channel_id.to_proto(),
1847                    name: "test-channel".to_string()
1848                }]
1849            )
1850        });
1851        let channel_a = channels_a.update(&mut cx_a, |this, cx| {
1852            this.get_channel(channel_id.to_proto(), cx).unwrap()
1853        });
1854        channel_a.read_with(&cx_a, |channel, _| assert!(channel.messages().is_empty()));
1855        channel_a
1856            .condition(&cx_a, |channel, _| {
1857                channel_messages(channel)
1858                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1859            })
1860            .await;
1861
1862        let channels_b = cx_b.add_model(|cx| ChannelList::new(user_store_b.clone(), client_b, cx));
1863        channels_b
1864            .condition(&mut cx_b, |list, _| list.available_channels().is_some())
1865            .await;
1866        channels_b.read_with(&cx_b, |list, _| {
1867            assert_eq!(
1868                list.available_channels().unwrap(),
1869                &[ChannelDetails {
1870                    id: channel_id.to_proto(),
1871                    name: "test-channel".to_string()
1872                }]
1873            )
1874        });
1875
1876        let channel_b = channels_b.update(&mut cx_b, |this, cx| {
1877            this.get_channel(channel_id.to_proto(), cx).unwrap()
1878        });
1879        channel_b.read_with(&cx_b, |channel, _| assert!(channel.messages().is_empty()));
1880        channel_b
1881            .condition(&cx_b, |channel, _| {
1882                channel_messages(channel)
1883                    == [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1884            })
1885            .await;
1886
1887        // Disconnect client B, ensuring we can still access its cached channel data.
1888        server.forbid_connections();
1889        server.disconnect_client(current_user_id(&user_store_b, &cx_b));
1890        while !matches!(
1891            status_b.recv().await,
1892            Some(rpc::Status::ReconnectionError { .. })
1893        ) {}
1894
1895        channels_b.read_with(&cx_b, |channels, _| {
1896            assert_eq!(
1897                channels.available_channels().unwrap(),
1898                [ChannelDetails {
1899                    id: channel_id.to_proto(),
1900                    name: "test-channel".to_string()
1901                }]
1902            )
1903        });
1904        channel_b.read_with(&cx_b, |channel, _| {
1905            assert_eq!(
1906                channel_messages(channel),
1907                [("user_b".to_string(), "hello A, it's B.".to_string(), false)]
1908            )
1909        });
1910
1911        // Send a message from client B while it is disconnected.
1912        channel_b
1913            .update(&mut cx_b, |channel, cx| {
1914                let task = channel
1915                    .send_message("can you see this?".to_string(), cx)
1916                    .unwrap();
1917                assert_eq!(
1918                    channel_messages(channel),
1919                    &[
1920                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1921                        ("user_b".to_string(), "can you see this?".to_string(), true)
1922                    ]
1923                );
1924                task
1925            })
1926            .await
1927            .unwrap_err();
1928
1929        // Send a message from client A while B is disconnected.
1930        channel_a
1931            .update(&mut cx_a, |channel, cx| {
1932                channel
1933                    .send_message("oh, hi B.".to_string(), cx)
1934                    .unwrap()
1935                    .detach();
1936                let task = channel.send_message("sup".to_string(), cx).unwrap();
1937                assert_eq!(
1938                    channel_messages(channel),
1939                    &[
1940                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1941                        ("user_a".to_string(), "oh, hi B.".to_string(), true),
1942                        ("user_a".to_string(), "sup".to_string(), true)
1943                    ]
1944                );
1945                task
1946            })
1947            .await
1948            .unwrap();
1949
1950        // Give client B a chance to reconnect.
1951        server.allow_connections();
1952        cx_b.foreground().advance_clock(Duration::from_secs(10));
1953
1954        // Verify that B sees the new messages upon reconnection, as well as the message client B
1955        // sent while offline.
1956        channel_b
1957            .condition(&cx_b, |channel, _| {
1958                channel_messages(channel)
1959                    == [
1960                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1961                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1962                        ("user_a".to_string(), "sup".to_string(), false),
1963                        ("user_b".to_string(), "can you see this?".to_string(), false),
1964                    ]
1965            })
1966            .await;
1967
1968        // Ensure client A and B can communicate normally after reconnection.
1969        channel_a
1970            .update(&mut cx_a, |channel, cx| {
1971                channel.send_message("you online?".to_string(), cx).unwrap()
1972            })
1973            .await
1974            .unwrap();
1975        channel_b
1976            .condition(&cx_b, |channel, _| {
1977                channel_messages(channel)
1978                    == [
1979                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1980                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
1981                        ("user_a".to_string(), "sup".to_string(), false),
1982                        ("user_b".to_string(), "can you see this?".to_string(), false),
1983                        ("user_a".to_string(), "you online?".to_string(), false),
1984                    ]
1985            })
1986            .await;
1987
1988        channel_b
1989            .update(&mut cx_b, |channel, cx| {
1990                channel.send_message("yep".to_string(), cx).unwrap()
1991            })
1992            .await
1993            .unwrap();
1994        channel_a
1995            .condition(&cx_a, |channel, _| {
1996                channel_messages(channel)
1997                    == [
1998                        ("user_b".to_string(), "hello A, it's B.".to_string(), false),
1999                        ("user_a".to_string(), "oh, hi B.".to_string(), false),
2000                        ("user_a".to_string(), "sup".to_string(), false),
2001                        ("user_b".to_string(), "can you see this?".to_string(), false),
2002                        ("user_a".to_string(), "you online?".to_string(), false),
2003                        ("user_b".to_string(), "yep".to_string(), false),
2004                    ]
2005            })
2006            .await;
2007    }
2008
2009    #[gpui::test]
2010    async fn test_collaborators(
2011        mut cx_a: TestAppContext,
2012        mut cx_b: TestAppContext,
2013        mut cx_c: TestAppContext,
2014    ) {
2015        cx_a.foreground().forbid_parking();
2016        let lang_registry = Arc::new(LanguageRegistry::new());
2017
2018        // Connect to a server as 3 clients.
2019        let mut server = TestServer::start().await;
2020        let (client_a, user_store_a) = server.create_client(&mut cx_a, "user_a").await;
2021        let (client_b, user_store_b) = server.create_client(&mut cx_b, "user_b").await;
2022        let (_client_c, user_store_c) = server.create_client(&mut cx_c, "user_c").await;
2023
2024        let fs = Arc::new(FakeFs::new());
2025
2026        // Share a worktree as client A.
2027        fs.insert_tree(
2028            "/a",
2029            json!({
2030                ".zed.toml": r#"collaborators = ["user_b", "user_c"]"#,
2031            }),
2032        )
2033        .await;
2034
2035        let worktree_a = Worktree::open_local(
2036            client_a.clone(),
2037            "/a".as_ref(),
2038            fs.clone(),
2039            lang_registry.clone(),
2040            &mut cx_a.to_async(),
2041        )
2042        .await
2043        .unwrap();
2044
2045        user_store_a
2046            .condition(&cx_a, |user_store, _| {
2047                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
2048            })
2049            .await;
2050        user_store_b
2051            .condition(&cx_b, |user_store, _| {
2052                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
2053            })
2054            .await;
2055        user_store_c
2056            .condition(&cx_c, |user_store, _| {
2057                collaborators(user_store) == vec![("user_a", vec![("a", vec![])])]
2058            })
2059            .await;
2060
2061        let worktree_id = worktree_a
2062            .update(&mut cx_a, |tree, cx| tree.as_local_mut().unwrap().share(cx))
2063            .await
2064            .unwrap();
2065
2066        let _worktree_b = Worktree::open_remote(
2067            client_b.clone(),
2068            worktree_id,
2069            lang_registry.clone(),
2070            &mut cx_b.to_async(),
2071        )
2072        .await
2073        .unwrap();
2074
2075        user_store_a
2076            .condition(&cx_a, |user_store, _| {
2077                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
2078            })
2079            .await;
2080        user_store_b
2081            .condition(&cx_b, |user_store, _| {
2082                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
2083            })
2084            .await;
2085        user_store_c
2086            .condition(&cx_c, |user_store, _| {
2087                collaborators(user_store) == vec![("user_a", vec![("a", vec!["user_b"])])]
2088            })
2089            .await;
2090
2091        cx_a.update(move |_| drop(worktree_a));
2092        user_store_a
2093            .condition(&cx_a, |user_store, _| collaborators(user_store) == vec![])
2094            .await;
2095        user_store_b
2096            .condition(&cx_b, |user_store, _| collaborators(user_store) == vec![])
2097            .await;
2098        user_store_c
2099            .condition(&cx_c, |user_store, _| collaborators(user_store) == vec![])
2100            .await;
2101
2102        fn collaborators(user_store: &UserStore) -> Vec<(&str, Vec<(&str, Vec<&str>)>)> {
2103            user_store
2104                .collaborators()
2105                .iter()
2106                .map(|collaborator| {
2107                    let worktrees = collaborator
2108                        .worktrees
2109                        .iter()
2110                        .map(|w| {
2111                            (
2112                                w.root_name.as_str(),
2113                                w.guests.iter().map(|p| p.github_login.as_str()).collect(),
2114                            )
2115                        })
2116                        .collect();
2117                    (collaborator.user.github_login.as_str(), worktrees)
2118                })
2119                .collect()
2120        }
2121    }
2122
2123    struct TestServer {
2124        peer: Arc<Peer>,
2125        app_state: Arc<AppState>,
2126        server: Arc<Server>,
2127        notifications: mpsc::Receiver<()>,
2128        connection_killers: Arc<Mutex<HashMap<UserId, watch::Sender<Option<()>>>>>,
2129        forbid_connections: Arc<AtomicBool>,
2130        _test_db: TestDb,
2131    }
2132
2133    impl TestServer {
2134        async fn start() -> Self {
2135            let test_db = TestDb::new();
2136            let app_state = Self::build_app_state(&test_db).await;
2137            let peer = Peer::new();
2138            let notifications = mpsc::channel(128);
2139            let server = Server::new(app_state.clone(), peer.clone(), Some(notifications.0));
2140            Self {
2141                peer,
2142                app_state,
2143                server,
2144                notifications: notifications.1,
2145                connection_killers: Default::default(),
2146                forbid_connections: Default::default(),
2147                _test_db: test_db,
2148            }
2149        }
2150
2151        async fn create_client(
2152            &mut self,
2153            cx: &mut TestAppContext,
2154            name: &str,
2155        ) -> (Arc<Client>, ModelHandle<UserStore>) {
2156            let user_id = self.app_state.db.create_user(name, false).await.unwrap();
2157            let client_name = name.to_string();
2158            let mut client = Client::new();
2159            let server = self.server.clone();
2160            let connection_killers = self.connection_killers.clone();
2161            let forbid_connections = self.forbid_connections.clone();
2162            Arc::get_mut(&mut client)
2163                .unwrap()
2164                .override_authenticate(move |cx| {
2165                    cx.spawn(|_| async move {
2166                        let access_token = "the-token".to_string();
2167                        Ok(Credentials {
2168                            user_id: user_id.0 as u64,
2169                            access_token,
2170                        })
2171                    })
2172                })
2173                .override_establish_connection(move |credentials, cx| {
2174                    assert_eq!(credentials.user_id, user_id.0 as u64);
2175                    assert_eq!(credentials.access_token, "the-token");
2176
2177                    let server = server.clone();
2178                    let connection_killers = connection_killers.clone();
2179                    let forbid_connections = forbid_connections.clone();
2180                    let client_name = client_name.clone();
2181                    cx.spawn(move |cx| async move {
2182                        if forbid_connections.load(SeqCst) {
2183                            Err(EstablishConnectionError::other(anyhow!(
2184                                "server is forbidding connections"
2185                            )))
2186                        } else {
2187                            let (client_conn, server_conn, kill_conn) = Connection::in_memory();
2188                            connection_killers.lock().insert(user_id, kill_conn);
2189                            cx.background()
2190                                .spawn(server.handle_connection(server_conn, client_name, user_id))
2191                                .detach();
2192                            Ok(client_conn)
2193                        }
2194                    })
2195                });
2196
2197            let http = FakeHttpClient::new(|_| async move { Ok(surf::http::Response::new(404)) });
2198            client
2199                .authenticate_and_connect(&cx.to_async())
2200                .await
2201                .unwrap();
2202
2203            let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http, cx));
2204            let mut authed_user =
2205                user_store.read_with(cx, |user_store, _| user_store.watch_current_user());
2206            while authed_user.recv().await.unwrap().is_none() {}
2207
2208            (client, user_store)
2209        }
2210
2211        fn disconnect_client(&self, user_id: UserId) {
2212            if let Some(mut kill_conn) = self.connection_killers.lock().remove(&user_id) {
2213                let _ = kill_conn.try_send(Some(()));
2214            }
2215        }
2216
2217        fn forbid_connections(&self) {
2218            self.forbid_connections.store(true, SeqCst);
2219        }
2220
2221        fn allow_connections(&self) {
2222            self.forbid_connections.store(false, SeqCst);
2223        }
2224
2225        async fn build_app_state(test_db: &TestDb) -> Arc<AppState> {
2226            let mut config = Config::default();
2227            config.session_secret = "a".repeat(32);
2228            config.database_url = test_db.url.clone();
2229            let github_client = github::AppClient::test();
2230            Arc::new(AppState {
2231                db: test_db.db().clone(),
2232                handlebars: Default::default(),
2233                auth_client: auth::build_client("", ""),
2234                repo_client: github::RepoClient::test(&github_client),
2235                github_client,
2236                config,
2237            })
2238        }
2239
2240        async fn state<'a>(&'a self) -> RwLockReadGuard<'a, Store> {
2241            self.server.store.read().await
2242        }
2243
2244        async fn condition<F>(&mut self, mut predicate: F)
2245        where
2246            F: FnMut(&Store) -> bool,
2247        {
2248            async_std::future::timeout(Duration::from_millis(500), async {
2249                while !(predicate)(&*self.server.store.read().await) {
2250                    self.notifications.recv().await;
2251                }
2252            })
2253            .await
2254            .expect("condition timed out");
2255        }
2256    }
2257
2258    impl Drop for TestServer {
2259        fn drop(&mut self) {
2260            task::block_on(self.peer.reset());
2261        }
2262    }
2263
2264    fn current_user_id(user_store: &ModelHandle<UserStore>, cx: &TestAppContext) -> UserId {
2265        UserId::from_proto(
2266            user_store.read_with(cx, |user_store, _| user_store.current_user().unwrap().id),
2267        )
2268    }
2269
2270    fn channel_messages(channel: &Channel) -> Vec<(String, String, bool)> {
2271        channel
2272            .messages()
2273            .cursor::<()>()
2274            .map(|m| {
2275                (
2276                    m.sender.github_login.clone(),
2277                    m.body.clone(),
2278                    m.is_pending(),
2279                )
2280            })
2281            .collect()
2282    }
2283
2284    struct EmptyView;
2285
2286    impl gpui::Entity for EmptyView {
2287        type Event = ();
2288    }
2289
2290    impl gpui::View for EmptyView {
2291        fn ui_name() -> &'static str {
2292            "empty view"
2293        }
2294
2295        fn render(&mut self, _: &mut gpui::RenderContext<Self>) -> gpui::ElementBox {
2296            gpui::Element::boxed(gpui::elements::Empty)
2297        }
2298    }
2299}