Persist audio and video mute state in video rooms (#8376)

…so that video lobbies remember whether you've disabled your camera.

src/components/views/voip/VideoLobby.tsx

@@ -21,7 +21,6 @@ import { Room } from "matrix-js-sdk/src/models/room";
 
 import { _t } from "../../../languageHandler";
 import { useAsyncMemo } from "../../../hooks/useAsyncMemo";
-import { useStateToggle } from "../../../hooks/useStateToggle";
 import { useConnectedMembers } from "../../../utils/VideoChannelUtils";
 import VideoChannelStore from "../../../stores/VideoChannelStore";
 import IconizedContextMenu, {
@@ -108,6 +107,7 @@ const DeviceButton: FC<IDeviceButtonProps> = ({
 const MAX_FACES = 8;
 
 const VideoLobby: FC<{ room: Room }> = ({ room }) => {
+    const store = VideoChannelStore.instance;
     const [connecting, setConnecting] = useState(false);
     const me = useMemo(() => room.getMember(room.myUserId), [room]);
     const connectedMembers = useConnectedMembers(room, false);
@@ -130,8 +130,16 @@ const VideoLobby: FC<{ room: Room }> = ({ room }) => {
     const audioDevice = selectedAudioDevice ?? audioDevices[0];
     const videoDevice = selectedVideoDevice ?? videoDevices[0];
 
-    const [audioActive, toggleAudio] = useStateToggle(true);
-    const [videoActive, toggleVideo] = useStateToggle(true);
+    const [audioActive, setAudioActive] = useState(!store.audioMuted);
+    const [videoActive, setVideoActive] = useState(!store.videoMuted);
+    const toggleAudio = () => {
+        store.audioMuted = audioActive;
+        setAudioActive(!audioActive);
+    };
+    const toggleVideo = () => {
+        store.videoMuted = videoActive;
+        setVideoActive(!videoActive);
+    };
 
     const videoStream = useAsyncMemo(async () => {
         if (videoDevice && videoActive) {
@@ -162,7 +170,7 @@ const VideoLobby: FC<{ room: Room }> = ({ room }) => {
     const connect = async () => {
         setConnecting(true);
         try {
-            await VideoChannelStore.instance.connect(
+            await store.connect(
                 room.roomId, audioActive ? audioDevice : null, videoActive ? videoDevice : null,
             );
         } catch (e) {

src/stores/VideoChannelStore.ts

@@ -94,6 +94,20 @@ export default class VideoChannelStore extends AsyncStoreWithClient<null> {
     public get participants(): IJitsiParticipant[] { return this._participants; }
     private set participants(value: IJitsiParticipant[]) { this._participants = value; }
 
+    private _audioMuted = localStorage.getItem("mx_audioMuted") === "true";
+    public get audioMuted(): boolean { return this._audioMuted; }
+    public set audioMuted(value: boolean) {
+        this._audioMuted = value;
+        localStorage.setItem("mx_audioMuted", value.toString());
+    }
+
+    private _videoMuted = localStorage.getItem("mx_videoMuted") === "true";
+    public get videoMuted(): boolean { return this._videoMuted; }
+    public set videoMuted(value: boolean) {
+        this._videoMuted = value;
+        localStorage.setItem("mx_videoMuted", value.toString());
+    }
+
     public connect = async (roomId: string, audioDevice: MediaDeviceInfo, videoDevice: MediaDeviceInfo) => {
         if (this.activeChannel) await this.disconnect();
 
@@ -136,10 +150,14 @@ export default class VideoChannelStore extends AsyncStoreWithClient<null> {
             }
         }
 
+        // Participant data and mute state will come down the event pipeline quickly, so prepare in advance
         this.activeChannel = messaging;
         this.roomId = roomId;
-        // Participant data will come down the event pipeline quickly, so prepare in advance
         messaging.on(`action:${ElementWidgetActions.CallParticipants}`, this.onParticipants);
+        messaging.on(`action:${ElementWidgetActions.MuteAudio}`, this.onMuteAudio);
+        messaging.on(`action:${ElementWidgetActions.UnmuteAudio}`, this.onUnmuteAudio);
+        messaging.on(`action:${ElementWidgetActions.MuteVideo}`, this.onMuteVideo);
+        messaging.on(`action:${ElementWidgetActions.UnmuteVideo}`, this.onUnmuteVideo);
 
         this.emit(VideoChannelEvent.StartConnect, roomId);
 
@@ -163,6 +181,10 @@ export default class VideoChannelStore extends AsyncStoreWithClient<null> {
             this.activeChannel = null;
             this.roomId = null;
             messaging.off(`action:${ElementWidgetActions.CallParticipants}`, this.onParticipants);
+            messaging.off(`action:${ElementWidgetActions.MuteAudio}`, this.onMuteAudio);
+            messaging.off(`action:${ElementWidgetActions.UnmuteAudio}`, this.onUnmuteAudio);
+            messaging.off(`action:${ElementWidgetActions.MuteVideo}`, this.onMuteVideo);
+            messaging.off(`action:${ElementWidgetActions.UnmuteVideo}`, this.onUnmuteVideo);
 
             this.emit(VideoChannelEvent.Disconnect, roomId);
 
@@ -238,4 +260,24 @@ export default class VideoChannelStore extends AsyncStoreWithClient<null> {
         this.emit(VideoChannelEvent.Participants, this.roomId, ev.detail.data.participants);
         this.ack(ev);
     };
+
+    private onMuteAudio = (ev: CustomEvent<IWidgetApiRequest>) => {
+        this.audioMuted = true;
+        this.ack(ev);
+    };
+
+    private onUnmuteAudio = (ev: CustomEvent<IWidgetApiRequest>) => {
+        this.audioMuted = false;
+        this.ack(ev);
+    };
+
+    private onMuteVideo = (ev: CustomEvent<IWidgetApiRequest>) => {
+        this.videoMuted = true;
+        this.ack(ev);
+    };
+
+    private onUnmuteVideo = (ev: CustomEvent<IWidgetApiRequest>) => {
+        this.videoMuted = false;
+        this.ack(ev);
+    };
 }