Show SFU participants who are not Matrix members

So that we can load SFU with the virtual participants and get them
displayed in the grid layout. Before that only participants who are part
of the Matrix were displayed (i.e. participants who have published
m.call.member event to declare their participation).

src/video-grid/VideoTileContainer.tsx

@@ -15,14 +15,18 @@ limitations under the License.
 */
 
 import React from "react";
-import { RoomMember } from "matrix-js-sdk/src/models/room-member";
+import {
+  RoomMember,
+  RoomMemberEvent,
+} from "matrix-js-sdk/src/models/room-member";
 import { LocalParticipant, RemoteParticipant } from "livekit-client";
 
-import { useRoomMemberName } from "./useRoomMemberName";
 import { TileContent, VideoTile } from "./VideoTile";
+import { Avatar } from "../Avatar";
+import Styles from "../room/InCallView.module.css";
 
 export interface ItemData {
-  member: RoomMember;
+  member?: RoomMember;
   sfuParticipant: LocalParticipant | RemoteParticipant;
   content: TileContent;
 }
@@ -31,29 +35,45 @@ interface Props {
   item: ItemData;
   width?: number;
   height?: number;
-  getAvatar: (
-    roomMember: RoomMember,
-    width: number,
-    height: number
-  ) => JSX.Element;
 }
 
-export function VideoTileContainer({
-  item,
-  width,
-  height,
-  getAvatar,
-  ...rest
-}: Props) {
-  const { rawDisplayName } = useRoomMemberName(item.member);
+export function VideoTileContainer({ item, width, height, ...rest }: Props) {
+  const [displayName, setDisplayName] = React.useState<string>("[👻]");
+
+  React.useEffect(() => {
+    const member = item.member;
+
+    if (member) {
+      setDisplayName(member.rawDisplayName);
+
+      const updateName = () => {
+        setDisplayName(member.rawDisplayName);
+      };
+
+      member!.on(RoomMemberEvent.Name, updateName);
+      return () => {
+        member!.removeListener(RoomMemberEvent.Name, updateName);
+      };
+    }
+  }, [item.member]);
+
+  const avatar = (
+    <Avatar
+      key={item.member?.userId}
+      size={Math.round(Math.min(width ?? 0, height ?? 0) / 2)}
+      src={item.member?.getMxcAvatarUrl()}
+      fallback={displayName.slice(0, 1).toUpperCase()}
+      className={Styles.avatar}
+    />
+  );
 
   return (
     <>
       <VideoTile
         sfuParticipant={item.sfuParticipant}
         content={item.content}
-        name={rawDisplayName}
-        avatar={getAvatar && getAvatar(item.member, width, height)}
+        name={displayName}
+        avatar={avatar}
         {...rest}
       />
     </>

src/video-grid/useRoomMemberName.ts

@@ -1,48 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-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 {
-  RoomMember,
-  RoomMemberEvent,
-} from "matrix-js-sdk/src/models/room-member";
-import { useState, useEffect } from "react";
-
-interface RoomMemberName {
-  name: string;
-  rawDisplayName: string;
-}
-export function useRoomMemberName(member: RoomMember): RoomMemberName {
-  const [state, setState] = useState<RoomMemberName>({
-    name: member.name,
-    rawDisplayName: member.rawDisplayName,
-  });
-
-  useEffect(() => {
-    function updateName() {
-      setState({ name: member.name, rawDisplayName: member.rawDisplayName });
-    }
-
-    updateName();
-
-    member.on(RoomMemberEvent.Name, updateName);
-
-    return () => {
-      member.removeListener(RoomMemberEvent.Name, updateName);
-    };
-  }, [member]);
-
-  return state;
-}