feat(video_calls): fixed online indicator and in app notifications for video call

lib/core/const.dart

@@ -9,4 +9,5 @@ const List<String> planTypeValues = ['fit', 'slim', 'wellness', 'behavior'];
 const newMessagesChannelName = 'private-new-chat-messages';
 const newNotificationsChannelName = 'private-message-events';
 const directChatChannelName = 'private-direct-chat';
+const presenceDirectChatChannelName = 'presence-direct-chat';
 const thresholdForPagination = 150;

lib/core/routing/other_routes.dart

@@ -236,6 +236,9 @@ class OtherRoutes {
               conversationUuid: extra['conversationUuid'] as String,
               counterpartName: extra['counterpartName'] as String?,
               counterpartAvatarUrl: extra['counterpartAvatarUrl'] as String?,
+              counterpartUserId: extra['counterpartUserId'] as int?,
+              counterpartIsOnline: extra['counterpartIsOnline'] as bool?,
+              counterpartLastSeenText: extra['counterpartLastSeenText'] as String?,
               localParticipantName: extra['localParticipantName'] as String?,
               entryMode: _videoCallEntryModeFromRouteExtra(extra['entryMode']),
               onBackToChat: extra['onBackToChat'] as void Function()?,

lib/core/websockets/ws_manager.dart

@@ -26,6 +26,13 @@ class WsManager {
   PrivateChannel? _privateNotificationChannel;
   PrivateChannel? _privateMessagesChannel;
   PrivateChannel? _privateDirectChatChannel;
+  PresenceChannel? _presenceDirectChatChannel;
+
+  StreamSubscription? _presenceMemberAddedSubscription;
+  StreamSubscription? _presenceMemberRemovedSubscription;
+  StreamSubscription? _presenceSubscriptionSucceededSubscription;
+  final List<_PresenceDirectChatListener> _presenceDirectChatListeners = [];
+  bool _presenceChannelEventsBound = false;
 
   StreamSubscription? _lifecycleSubscription;
   StreamSubscription? _eventSubscription;
@@ -175,6 +182,107 @@ class WsManager {
     );
   }
 
+  Future<void> initPresenceDirectChatChannel(String chatId) async {
+    final token = await TokenStorage.getTokenFromStorage();
+    _presenceDirectChatChannel = client?.presenceChannel(
+      '$presenceDirectChatChannelName.$chatId',
+      authorizationDelegate: EndpointAuthorizableChannelTokenAuthorizationDelegate.forPresenceChannel(
+        authorizationEndpoint: Uri.parse('${sl<AppConfig>().baseUrl}/broadcasting/auth'),
+        headers: {
+          'Authorization': 'Bearer $token',
+        },
+      ),
+    );
+  }
+
+  void addPresenceDirectChatListener({
+    required int counterpartUserId,
+    required void Function(bool isOnline) onCounterpartOnlineChanged,
+  }) {
+    final channel = _presenceDirectChatChannel;
+    if (channel == null) return;
+
+    _presenceDirectChatListeners.add(
+      _PresenceDirectChatListener(
+        counterpartUserId: counterpartUserId,
+        onCounterpartOnlineChanged: onCounterpartOnlineChanged,
+      ),
+    );
+
+    _bindPresenceChannelEventsIfNeeded();
+    channel.subscribe();
+    _emitCounterpartPresence(counterpartUserId);
+  }
+
+  void removePresenceDirectChatListener(
+    void Function(bool isOnline) onCounterpartOnlineChanged,
+  ) {
+    _presenceDirectChatListeners.removeWhere(
+      (listener) => listener.onCounterpartOnlineChanged == onCounterpartOnlineChanged,
+    );
+    if (_presenceDirectChatListeners.isEmpty) {
+      unsubscribePresenceDirectChatChannel();
+    }
+  }
+
+  void _bindPresenceChannelEventsIfNeeded() {
+    if (_presenceChannelEventsBound) return;
+    final channel = _presenceDirectChatChannel;
+    if (channel == null) return;
+
+    _presenceChannelEventsBound = true;
+
+    _presenceSubscriptionSucceededSubscription =
+        channel.whenSubscriptionSucceeded().listen((_) {
+      final counterpartIds = _presenceDirectChatListeners
+          .map((listener) => listener.counterpartUserId)
+          .toSet();
+      for (final counterpartUserId in counterpartIds) {
+        _emitCounterpartPresence(counterpartUserId);
+      }
+    });
+    _presenceMemberAddedSubscription = channel.whenMemberAdded().listen((event) {
+      final memberUserId = _parsePresenceMemberUserId(event.data);
+      if (memberUserId == null) return;
+      _notifyPresenceListeners(memberUserId, isOnline: true);
+    });
+    _presenceMemberRemovedSubscription = channel.whenMemberRemoved().listen((event) {
+      final memberUserId = _parsePresenceMemberUserId(event.data);
+      if (memberUserId == null) return;
+      _notifyPresenceListeners(memberUserId, isOnline: false);
+    });
+  }
+
+  void _emitCounterpartPresence(int counterpartUserId) {
+    final channel = _presenceDirectChatChannel;
+    if (channel == null) return;
+    final members = channel.state?.members;
+    if (members == null) return;
+    final isOnline = members.getMemberInfo(counterpartUserId.toString()) != null;
+    _notifyPresenceListeners(counterpartUserId, isOnline: isOnline);
+  }
+
+  void _notifyPresenceListeners(int counterpartUserId, {required bool isOnline}) {
+    for (final listener in _presenceDirectChatListeners) {
+      if (listener.counterpartUserId == counterpartUserId) {
+        listener.onCounterpartOnlineChanged(isOnline);
+      }
+    }
+  }
+
+  int? _parsePresenceMemberUserId(String? data) {
+    if (data == null || data.isEmpty) return null;
+    try {
+      final decoded = jsonDecode(data);
+      if (decoded is! Map) return null;
+      final rawId = decoded['user_id'] ?? decoded['id'];
+      if (rawId == null) return null;
+      return int.tryParse(rawId.toString());
+    } catch (_) {
+      return null;
+    }
+  }
+
   void _subscribe() {
     _privateMessagesChannel?.subscribe();
     _privateNotificationChannel?.subscribe();
@@ -193,6 +301,19 @@ class WsManager {
     _privateDirectChatChannel?.unsubscribe();
   }
 
+  void unsubscribePresenceDirectChatChannel() {
+    _presenceSubscriptionSucceededSubscription?.cancel();
+    _presenceMemberAddedSubscription?.cancel();
+    _presenceMemberRemovedSubscription?.cancel();
+    _presenceSubscriptionSucceededSubscription = null;
+    _presenceMemberAddedSubscription = null;
+    _presenceMemberRemovedSubscription = null;
+    _presenceDirectChatListeners.clear();
+    _presenceChannelEventsBound = false;
+    _presenceDirectChatChannel?.unsubscribe();
+    _presenceDirectChatChannel = null;
+  }
+
   Future<void> clear() async {
     await client?.disconnect();
     await _lifecycleSubscription?.cancel();
@@ -204,6 +325,7 @@ class WsManager {
     client = null;
     userId = null;
     _privateDirectChatChannel?.unsubscribe();
+    unsubscribePresenceDirectChatChannel();
     _privateMessagesChannel?.unsubscribe();
     _privateNotificationChannel?.unsubscribe();
     _privateDirectChatChannel = null;
@@ -211,3 +333,13 @@ class WsManager {
     _privateNotificationChannel = null;
   }
 }
+
+class _PresenceDirectChatListener {
+  const _PresenceDirectChatListener({
+    required this.counterpartUserId,
+    required this.onCounterpartOnlineChanged,
+  });
+
+  final int counterpartUserId;
+  final void Function(bool isOnline) onCounterpartOnlineChanged;
+}