typescript src/video-grid (#511)

src/video-grid/useCallFeed.ts

@@ -0,0 +1,93 @@
+/*
+Copyright 2022 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 { useState, useEffect } from "react";
+import { CallFeed, CallFeedEvent } from "matrix-js-sdk/src/webrtc/callFeed";
+import { RoomMember } from "matrix-js-sdk";
+import { SDPStreamMetadataPurpose } from "matrix-js-sdk/src/webrtc/callEventTypes";
+
+interface CallFeedState {
+  member: RoomMember;
+  isLocal: boolean;
+  speaking: boolean;
+  videoMuted: boolean;
+  audioMuted: boolean;
+  localVolume: number;
+  stream: MediaStream;
+  purpose: SDPStreamMetadataPurpose;
+}
+function getCallFeedState(callFeed: CallFeed): CallFeedState {
+  return {
+    member: callFeed ? callFeed.getMember() : null,
+    isLocal: callFeed ? callFeed.isLocal() : false,
+    speaking: callFeed ? callFeed.isSpeaking() : false,
+    videoMuted: callFeed ? callFeed.isVideoMuted() : true,
+    audioMuted: callFeed ? callFeed.isAudioMuted() : true,
+    localVolume: callFeed ? callFeed.getLocalVolume() : 0,
+    stream: callFeed ? callFeed.stream : undefined,
+    purpose: callFeed ? callFeed.purpose : undefined,
+  };
+}
+
+export function useCallFeed(callFeed: CallFeed): CallFeedState {
+  const [state, setState] = useState<CallFeedState>(() =>
+    getCallFeedState(callFeed)
+  );
+
+  useEffect(() => {
+    function onSpeaking(speaking: boolean) {
+      setState((prevState) => ({ ...prevState, speaking }));
+    }
+
+    function onMuteStateChanged(audioMuted: boolean, videoMuted: boolean) {
+      setState((prevState) => ({ ...prevState, audioMuted, videoMuted }));
+    }
+
+    function onLocalVolumeChanged(localVolume: number) {
+      setState((prevState) => ({ ...prevState, localVolume }));
+    }
+
+    function onUpdateCallFeed() {
+      setState(getCallFeedState(callFeed));
+    }
+
+    if (callFeed) {
+      callFeed.on(CallFeedEvent.Speaking, onSpeaking);
+      callFeed.on(CallFeedEvent.MuteStateChanged, onMuteStateChanged);
+      callFeed.on(CallFeedEvent.LocalVolumeChanged, onLocalVolumeChanged);
+      callFeed.on(CallFeedEvent.NewStream, onUpdateCallFeed);
+    }
+
+    onUpdateCallFeed();
+
+    return () => {
+      if (callFeed) {
+        callFeed.removeListener(CallFeedEvent.Speaking, onSpeaking);
+        callFeed.removeListener(
+          CallFeedEvent.MuteStateChanged,
+          onMuteStateChanged
+        );
+        callFeed.removeListener(
+          CallFeedEvent.LocalVolumeChanged,
+          onLocalVolumeChanged
+        );
+        callFeed.removeListener(CallFeedEvent.NewStream, onUpdateCallFeed);
+      }
+    };
+  }, [callFeed]);
+
+  return state;
+}