Updated 18 files, added 1692 files and deleted includes/system/compare.inc (automated)

1 files changed, 425 insertions, 0 deletions

diff --git a/includes/external/matrix/node_modules/matrix-js-sdk/src/webrtc/callEventHandler.ts b/includes/external/matrix/node_modules/matrix-js-sdk/src/webrtc/callEventHandler.ts
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+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { MatrixEvent } from "../models/event";
+import { logger } from "../logger";
+import { CallDirection, CallError, CallErrorCode, CallState, createNewMatrixCall, MatrixCall } from "./call";
+import { EventType } from "../@types/event";
+import { ClientEvent, MatrixClient } from "../client";
+import { MCallAnswer, MCallHangupReject } from "./callEventTypes";
+import { GroupCall, GroupCallErrorCode, GroupCallEvent, GroupCallUnknownDeviceError } from "./groupCall";
+import { RoomEvent } from "../models/room";
+
+// Don't ring unless we'd be ringing for at least 3 seconds: the user needs some
+// time to press the 'accept' button
+const RING_GRACE_PERIOD = 3000;
+
+export enum CallEventHandlerEvent {
+    Incoming = "Call.incoming",
+}
+
+export type CallEventHandlerEventHandlerMap = {
+    /**
+     * Fires whenever an incoming call arrives.
+     * @param call - The incoming call.
+     * @example
+     * ```
+     * matrixClient.on("Call.incoming", function(call){
+     *   call.answer(); // auto-answer
+     * });
+     * ```
+     */
+    [CallEventHandlerEvent.Incoming]: (call: MatrixCall) => void;
+};
+
+export class CallEventHandler {
+    // XXX: Most of these are only public because of the tests
+    public calls: Map<string, MatrixCall>;
+    public callEventBuffer: MatrixEvent[];
+    public nextSeqByCall: Map<string, number> = new Map();
+    public toDeviceEventBuffers: Map<string, Array<MatrixEvent>> = new Map();
+
+    private client: MatrixClient;
+    private candidateEventsByCall: Map<string, Array<MatrixEvent>>;
+    private eventBufferPromiseChain?: Promise<void>;
+
+    public constructor(client: MatrixClient) {
+        this.client = client;
+        this.calls = new Map<string, MatrixCall>();
+        // The sync code always emits one event at a time, so it will patiently
+        // wait for us to finish processing a call invite before delivering the
+        // next event, even if that next event is a hangup. We therefore accumulate
+        // all our call events and then process them on the 'sync' event, ie.
+        // each time a sync has completed. This way, we can avoid emitting incoming
+        // call events if we get both the invite and answer/hangup in the same sync.
+        // This happens quite often, eg. replaying sync from storage, catchup sync
+        // after loading and after we've been offline for a bit.
+        this.callEventBuffer = [];
+        this.candidateEventsByCall = new Map<string, Array<MatrixEvent>>();
+    }
+
+    public start(): void {
+        this.client.on(ClientEvent.Sync, this.onSync);
+        this.client.on(RoomEvent.Timeline, this.onRoomTimeline);
+        this.client.on(ClientEvent.ToDeviceEvent, this.onToDeviceEvent);
+    }
+
+    public stop(): void {
+        this.client.removeListener(ClientEvent.Sync, this.onSync);
+        this.client.removeListener(RoomEvent.Timeline, this.onRoomTimeline);
+        this.client.removeListener(ClientEvent.ToDeviceEvent, this.onToDeviceEvent);
+    }
+
+    private onSync = (): void => {
+        // Process the current event buffer and start queuing into a new one.
+        const currentEventBuffer = this.callEventBuffer;
+        this.callEventBuffer = [];
+
+        // Ensure correct ordering by only processing this queue after the previous one has finished processing
+        if (this.eventBufferPromiseChain) {
+            this.eventBufferPromiseChain = this.eventBufferPromiseChain.then(() =>
+                this.evaluateEventBuffer(currentEventBuffer),
+            );
+        } else {
+            this.eventBufferPromiseChain = this.evaluateEventBuffer(currentEventBuffer);
+        }
+    };
+
+    private async evaluateEventBuffer(eventBuffer: MatrixEvent[]): Promise<void> {
+        await Promise.all(eventBuffer.map((event) => this.client.decryptEventIfNeeded(event)));
+
+        const callEvents = eventBuffer.filter((event) => {
+            const eventType = event.getType();
+            return eventType.startsWith("m.call.") || eventType.startsWith("org.matrix.call.");
+        });
+
+        const ignoreCallIds = new Set<string>();
+
+        // inspect the buffer and mark all calls which have been answered
+        // or hung up before passing them to the call event handler.
+        for (const event of callEvents) {
+            const eventType = event.getType();
+
+            if (eventType === EventType.CallAnswer || eventType === EventType.CallHangup) {
+                ignoreCallIds.add(event.getContent().call_id);
+            }
+        }
+
+        // Process call events in the order that they were received
+        for (const event of callEvents) {
+            const eventType = event.getType();
+            const callId = event.getContent().call_id;
+
+            if (eventType === EventType.CallInvite && ignoreCallIds.has(callId)) {
+                // This call has previously been answered or hung up: ignore it
+                continue;
+            }
+
+            try {
+                await this.handleCallEvent(event);
+            } catch (e) {
+                logger.error("CallEventHandler evaluateEventBuffer() caught exception handling call event", e);
+            }
+        }
+    }
+
+    private onRoomTimeline = (event: MatrixEvent): void => {
+        this.callEventBuffer.push(event);
+    };
+
+    private onToDeviceEvent = (event: MatrixEvent): void => {
+        const content = event.getContent();
+
+        if (!content.call_id) {
+            this.callEventBuffer.push(event);
+            return;
+        }
+
+        if (!this.nextSeqByCall.has(content.call_id)) {
+            this.nextSeqByCall.set(content.call_id, 0);
+        }
+
+        if (content.seq === undefined) {
+            this.callEventBuffer.push(event);
+            return;
+        }
+
+        const nextSeq = this.nextSeqByCall.get(content.call_id) || 0;
+
+        if (content.seq !== nextSeq) {
+            if (!this.toDeviceEventBuffers.has(content.call_id)) {
+                this.toDeviceEventBuffers.set(content.call_id, []);
+            }
+
+            const buffer = this.toDeviceEventBuffers.get(content.call_id)!;
+            const index = buffer.findIndex((e) => e.getContent().seq > content.seq);
+
+            if (index === -1) {
+                buffer.push(event);
+            } else {
+                buffer.splice(index, 0, event);
+            }
+        } else {
+            const callId = content.call_id;
+            this.callEventBuffer.push(event);
+            this.nextSeqByCall.set(callId, content.seq + 1);
+
+            const buffer = this.toDeviceEventBuffers.get(callId);
+
+            let nextEvent = buffer && buffer.shift();
+
+            while (nextEvent && nextEvent.getContent().seq === this.nextSeqByCall.get(callId)) {
+                this.callEventBuffer.push(nextEvent);
+                this.nextSeqByCall.set(callId, nextEvent.getContent().seq + 1);
+                nextEvent = buffer!.shift();
+            }
+        }
+    };
+
+    private async handleCallEvent(event: MatrixEvent): Promise<void> {
+        this.client.emit(ClientEvent.ReceivedVoipEvent, event);
+
+        const content = event.getContent();
+        const callRoomId =
+            event.getRoomId() || this.client.groupCallEventHandler!.getGroupCallById(content.conf_id)?.room?.roomId;
+        const groupCallId = content.conf_id;
+        const type = event.getType() as EventType;
+        const senderId = event.getSender()!;
+        let call = content.call_id ? this.calls.get(content.call_id) : undefined;
+
+        let opponentDeviceId: string | undefined;
+
+        let groupCall: GroupCall | undefined;
+        if (groupCallId) {
+            groupCall = this.client.groupCallEventHandler!.getGroupCallById(groupCallId);
+
+            if (!groupCall) {
+                logger.warn(
+                    `CallEventHandler handleCallEvent() could not find a group call - ignoring event (groupCallId=${groupCallId}, type=${type})`,
+                );
+                return;
+            }
+
+            opponentDeviceId = content.device_id;
+
+            if (!opponentDeviceId) {
+                logger.warn(
+                    `CallEventHandler handleCallEvent() could not find a device id - ignoring event (senderId=${senderId})`,
+                );
+                groupCall.emit(GroupCallEvent.Error, new GroupCallUnknownDeviceError(senderId));
+                return;
+            }
+
+            if (content.dest_session_id !== this.client.getSessionId()) {
+                logger.warn(
+                    "CallEventHandler handleCallEvent() call event does not match current session id - ignoring",
+                );
+                return;
+            }
+        }
+
+        const weSentTheEvent =
+            senderId === this.client.credentials.userId &&
+            (opponentDeviceId === undefined || opponentDeviceId === this.client.getDeviceId()!);
+
+        if (!callRoomId) return;
+
+        if (type === EventType.CallInvite) {
+            // ignore invites you send
+            if (weSentTheEvent) return;
+            // expired call
+            if (event.getLocalAge() > content.lifetime - RING_GRACE_PERIOD) return;
+            // stale/old invite event
+            if (call && call.state === CallState.Ended) return;
+
+            if (call) {
+                logger.warn(
+                    `CallEventHandler handleCallEvent() already has a call but got an invite - clobbering (callId=${content.call_id})`,
+                );
+            }
+
+            if (content.invitee && content.invitee !== this.client.getUserId()) {
+                return; // This invite was meant for another user in the room
+            }
+
+            const timeUntilTurnCresExpire = (this.client.getTurnServersExpiry() ?? 0) - Date.now();
+            logger.info(
+                "CallEventHandler handleCallEvent() current turn creds expire in " + timeUntilTurnCresExpire + " ms",
+            );
+            call =
+                createNewMatrixCall(this.client, callRoomId, {
+                    forceTURN: this.client.forceTURN,
+                    opponentDeviceId,
+                    groupCallId,
+                    opponentSessionId: content.sender_session_id,
+                }) ?? undefined;
+            if (!call) {
+                logger.log(
+                    `CallEventHandler handleCallEvent() this client does not support WebRTC (callId=${content.call_id})`,
+                );
+                // don't hang up the call: there could be other clients
+                // connected that do support WebRTC and declining the
+                // the call on their behalf would be really annoying.
+                return;
+            }
+
+            call.callId = content.call_id;
+            const stats = groupCall?.getGroupCallStats();
+            if (stats) {
+                call.initStats(stats);
+            }
+
+            try {
+                await call.initWithInvite(event);
+            } catch (e) {
+                if (e instanceof CallError) {
+                    if (e.code === GroupCallErrorCode.UnknownDevice) {
+                        groupCall?.emit(GroupCallEvent.Error, e);
+                    } else {
+                        logger.error(e);
+                    }
+                }
+            }
+            this.calls.set(call.callId, call);
+
+            // if we stashed candidate events for that call ID, play them back now
+            if (this.candidateEventsByCall.get(call.callId)) {
+                for (const ev of this.candidateEventsByCall.get(call.callId)!) {
+                    call.onRemoteIceCandidatesReceived(ev);
+                }
+            }
+
+            // Were we trying to call that user (room)?
+            let existingCall: MatrixCall | undefined;
+            for (const thisCall of this.calls.values()) {
+                const isCalling = [CallState.WaitLocalMedia, CallState.CreateOffer, CallState.InviteSent].includes(
+                    thisCall.state,
+                );
+
+                if (
+                    call.roomId === thisCall.roomId &&
+                    thisCall.direction === CallDirection.Outbound &&
+                    call.getOpponentMember()?.userId === thisCall.invitee &&
+                    isCalling
+                ) {
+                    existingCall = thisCall;
+                    break;
+                }
+            }
+
+            if (existingCall) {
+                if (existingCall.callId > call.callId) {
+                    logger.log(
+                        `CallEventHandler handleCallEvent() detected glare - answering incoming call and canceling outgoing call (incomingId=${call.callId}, outgoingId=${existingCall.callId})`,
+                    );
+                    existingCall.replacedBy(call);
+                } else {
+                    logger.log(
+                        `CallEventHandler handleCallEvent() detected glare - hanging up incoming call (incomingId=${call.callId}, outgoingId=${existingCall.callId})`,
+                    );
+                    call.hangup(CallErrorCode.Replaced, true);
+                }
+            } else {
+                this.client.emit(CallEventHandlerEvent.Incoming, call);
+            }
+            return;
+        } else if (type === EventType.CallCandidates) {
+            if (weSentTheEvent) return;
+
+            if (!call) {
+                // store the candidates; we may get a call eventually.
+                if (!this.candidateEventsByCall.has(content.call_id)) {
+                    this.candidateEventsByCall.set(content.call_id, []);
+                }
+                this.candidateEventsByCall.get(content.call_id)!.push(event);
+            } else {
+                call.onRemoteIceCandidatesReceived(event);
+            }
+            return;
+        } else if ([EventType.CallHangup, EventType.CallReject].includes(type)) {
+            // Note that we also observe our own hangups here so we can see
+            // if we've already rejected a call that would otherwise be valid
+            if (!call) {
+                // if not live, store the fact that the call has ended because
+                // we're probably getting events backwards so
+                // the hangup will come before the invite
+                call =
+                    createNewMatrixCall(this.client, callRoomId, {
+                        opponentDeviceId,
+                        opponentSessionId: content.sender_session_id,
+                    }) ?? undefined;
+                if (call) {
+                    call.callId = content.call_id;
+                    call.initWithHangup(event);
+                    this.calls.set(content.call_id, call);
+                }
+            } else {
+                if (call.state !== CallState.Ended) {
+                    if (type === EventType.CallHangup) {
+                        call.onHangupReceived(content as MCallHangupReject);
+                    } else {
+                        call.onRejectReceived(content as MCallHangupReject);
+                    }
+
+                    // @ts-expect-error typescript thinks the state can't be 'ended' because we're
+                    // inside the if block where it wasn't, but it could have changed because
+                    // on[Hangup|Reject]Received are side-effecty.
+                    if (call.state === CallState.Ended) this.calls.delete(content.call_id);
+                }
+            }
+            return;
+        }
+
+        // The following events need a call and a peer connection
+        if (!call || !call.hasPeerConnection) {
+            logger.info(
+                `CallEventHandler handleCallEvent() discarding possible call event as we don't have a call (type=${type})`,
+            );
+            return;
+        }
+        // Ignore remote echo
+        if (event.getContent().party_id === call.ourPartyId) return;
+
+        switch (type) {
+            case EventType.CallAnswer:
+                if (weSentTheEvent) {
+                    if (call.state === CallState.Ringing) {
+                        call.onAnsweredElsewhere(content as MCallAnswer);
+                    }
+                } else {
+                    call.onAnswerReceived(event);
+                }
+                break;
+            case EventType.CallSelectAnswer:
+                call.onSelectAnswerReceived(event);
+                break;
+
+            case EventType.CallNegotiate:
+                call.onNegotiateReceived(event);
+                break;
+
+            case EventType.CallAssertedIdentity:
+            case EventType.CallAssertedIdentityPrefix:
+                call.onAssertedIdentityReceived(event);
+                break;
+
+            case EventType.CallSDPStreamMetadataChanged:
+            case EventType.CallSDPStreamMetadataChangedPrefix:
+                call.onSDPStreamMetadataChangedReceived(event);
+                break;
+        }
+    }
+}