refactor: active room ID now only in defined in the path

lib/pages/chat.dart

@@ -204,7 +204,6 @@ class ChatController extends State<Chat> {
   void dispose() {
     timeline?.cancelSubscriptions();
     timeline = null;
-    matrix.client.activeRoomId = '';
     super.dispose();
   }
 

lib/pages/views/chat_view.dart

@@ -47,7 +47,6 @@ class ChatView extends StatelessWidget {
         ),
       );
     }
-    controller.matrix.client.activeRoomId = controller.roomId;
 
     if (controller.room.membership == Membership.invite) {
       showFutureLoadingDialog(

lib/utils/background_push.dart

@@ -586,8 +586,10 @@ class BackgroundPush {
     await room.postLoad();
     final event = await client.database.getEventById(client.id, eventId, room);
 
-    if (((client.activeRoomId?.isNotEmpty ?? false) &&
-            client.activeRoomId == room.id &&
+    final activeRoomId = router.currentState.pathParameters['roomid'];
+
+    if (((activeRoomId?.isNotEmpty ?? false) &&
+            activeRoomId == room.id &&
             client.syncPresence == null) ||
         (event != null && room.notificationCount == 0)) {
       return;

lib/utils/matrix_sdk_extensions.dart/fluffy_client.dart

@@ -7,9 +7,6 @@ import '../famedlysdk_store.dart';
 class FluffyClient extends Client {
   static FluffyClient _instance;
 
-  /// The ID of the currently active room, if there is one. May be null or emtpy
-  String activeRoomId;
-
   factory FluffyClient({testMode = false}) {
     _instance ??= FluffyClient._internal(testMode: testMode);
     return _instance;

lib/widgets/matrix.dart

@@ -204,9 +204,12 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
 
   bool webHasFocus = true;
 
+  String get activeRoomId =>
+      VRouter.of(navigatorContext).pathParameters['roomid'];
+
   void _showLocalNotification(EventUpdate eventUpdate) async {
     final roomId = eventUpdate.roomID;
-    if (webHasFocus && client.activeRoomId == roomId) return;
+    if (webHasFocus && activeRoomId == roomId) return;
     final room = client.getRoomById(roomId);
     if (room.notificationCount == 0) return;
     final event = Event.fromJson(eventUpdate.content, room);