[Room] enhance performance

lib/src/Room.dart

@@ -27,6 +27,7 @@ import 'package:famedlysdk/src/RoomAccountData.dart';
 import 'package:famedlysdk/src/RoomState.dart';
 import 'package:famedlysdk/src/responses/ErrorResponse.dart';
 import 'package:famedlysdk/src/sync/EventUpdate.dart';
+import 'package:famedlysdk/src/sync/RoomUpdate.dart';
 import 'package:famedlysdk/src/utils/ChatTime.dart';
 import 'package:famedlysdk/src/utils/MatrixFile.dart';
 import 'package:famedlysdk/src/utils/MxContent.dart';
@@ -532,6 +533,15 @@ class Room {
         client.connection.onEvent.add(eventUpdate);
       }
     }
+    client.connection.onRoomUpdate.add(
+      RoomUpdate(
+        id: id,
+        membership: membership,
+        prev_batch: resp["end"],
+        notification_count: notificationCount,
+        highlight_count: highlightCount,
+      ),
+    );
   }
 
   /// Sets this room as a direct chat for this user.

lib/src/RoomList.dart

@@ -59,6 +59,7 @@ class RoomList {
 
   StreamSubscription<EventUpdate> eventSub;
   StreamSubscription<RoomUpdate> roomSub;
+  StreamSubscription<bool> firstSyncSub;
 
   RoomList(
       {this.client,
@@ -69,6 +70,8 @@ class RoomList {
       this.onlyLeft = false}) {
     eventSub ??= client.connection.onEvent.stream.listen(_handleEventUpdate);
     roomSub ??= client.connection.onRoomUpdate.stream.listen(_handleRoomUpdate);
+    firstSyncSub ??=
+        client.connection.onFirstSync.stream.listen((b) => sortAndUpdate());
     sort();
   }
 
@@ -148,6 +151,7 @@ class RoomList {
   }
 
   void _handleEventUpdate(EventUpdate eventUpdate) {
+    if (eventUpdate.type == "history") return;
     // Search the room in the rooms
     num j = 0;
     for (j = 0; j < rooms.length; j++) {
@@ -170,7 +174,7 @@ class RoomList {
           RoomAccountData.fromJson(eventUpdate.content, rooms[j]);
     }
     if (rooms[j].onUpdate != null) rooms[j].onUpdate();
-    sortAndUpdate();
+    if (eventUpdate.type == "timeline") sortAndUpdate();
   }
 
   bool sortLock = false;
@@ -184,6 +188,7 @@ class RoomList {
   }
 
   sortAndUpdate() {
+    if (client.prevBatch == null) return;
     sort();
     if (onUpdate != null) onUpdate();
   }

test/RoomList_test.dart

@@ -37,6 +37,7 @@ void main() {
     test("Create and insert one room", () async {
       final Client client = Client("testclient");
       client.homeserver = "https://testserver.abc";
+      client.prevBatch = "1234";
 
       int updateCount = 0;
       List<int> insertList = [];
@@ -85,6 +86,7 @@ void main() {
     test("Restort", () async {
       final Client client = Client("testclient");
       client.homeserver = "https://testserver.abc";
+      client.prevBatch = "1234";
 
       int updateCount = 0;
       List<int> insertList = [];
@@ -198,6 +200,7 @@ void main() {
     test("onlyLeft", () async {
       final Client client = Client("testclient");
       client.homeserver = "https://testserver.abc";
+      client.prevBatch = "1234";
 
       int updateCount = 0;
       List<int> insertList = [];