Refactor matrix hooks

src/home/useGroupCallRooms.js

@@ -0,0 +1,87 @@
+import { useState, useEffect } from "react";
+
+const tsCache = {};
+
+function getLastTs(client, r) {
+  if (tsCache[r.roomId]) {
+    return tsCache[r.roomId];
+  }
+
+  if (!r || !r.timeline) {
+    const ts = Number.MAX_SAFE_INTEGER;
+    tsCache[r.roomId] = ts;
+    return ts;
+  }
+
+  const myUserId = client.getUserId();
+
+  if (r.getMyMembership() !== "join") {
+    const membershipEvent = r.currentState.getStateEvents(
+      "m.room.member",
+      myUserId
+    );
+
+    if (membershipEvent && !Array.isArray(membershipEvent)) {
+      const ts = membershipEvent.getTs();
+      tsCache[r.roomId] = ts;
+      return ts;
+    }
+  }
+
+  for (let i = r.timeline.length - 1; i >= 0; --i) {
+    const ev = r.timeline[i];
+    const ts = ev.getTs();
+
+    if (ts) {
+      tsCache[r.roomId] = ts;
+      return ts;
+    }
+  }
+
+  const ts = Number.MAX_SAFE_INTEGER;
+  tsCache[r.roomId] = ts;
+  return ts;
+}
+
+function sortRooms(client, rooms) {
+  return rooms.sort((a, b) => {
+    return getLastTs(client, b) - getLastTs(client, a);
+  });
+}
+
+export function useGroupCallRooms(client) {
+  const [rooms, setRooms] = useState([]);
+
+  useEffect(() => {
+    function updateRooms() {
+      const groupCalls = client.groupCallEventHandler.groupCalls.values();
+      const rooms = Array.from(groupCalls).map((groupCall) => groupCall.room);
+      const sortedRooms = sortRooms(client, rooms);
+      const items = sortedRooms.map((room) => {
+        const groupCall = client.getGroupCallForRoom(room.roomId);
+
+        return {
+          roomId: room.getCanonicalAlias() || room.roomId,
+          roomName: room.name,
+          avatarUrl: null,
+          room,
+          groupCall,
+          participants: [...groupCall.participants],
+        };
+      });
+      setRooms(items);
+    }
+
+    updateRooms();
+
+    client.on("GroupCall.incoming", updateRooms);
+    client.on("GroupCall.participants", updateRooms);
+
+    return () => {
+      client.removeListener("GroupCall.incoming", updateRooms);
+      client.removeListener("GroupCall.participants", updateRooms);
+    };
+  }, []);
+
+  return rooms;
+}