Sync update: 2026-05-18 14:22:09

whatsapp_app/lib/services/firebase_service.dart

@@ -0,0 +1,120 @@
+import 'dart:convert';
+import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:get/get.dart';
+import '../models/conversation_model.dart';
+import '../screens/chat_screen.dart';
+import 'whatsapp_service.dart';
+
+@pragma('vm:entry-point')
+Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
+  // We can't access GetX services easily here since it's a separate isolate,
+  // but Firebase automatically shows the notification.
+  print("Handling a background message: ${message.messageId}");
+}
+
+class FirebaseService extends GetxService {
+  final FirebaseMessaging _messaging = FirebaseMessaging.instance;
+  final FlutterLocalNotificationsPlugin _localNotifications = FlutterLocalNotificationsPlugin();
+
+  Future<FirebaseService> init() async {
+    // 1. Request Permission
+    await _messaging.requestPermission(
+      alert: true,
+      badge: true,
+      sound: true,
+    );
+
+    // 2. Initialize Local Notifications (for foreground)
+    const androidInit = AndroidInitializationSettings('@mipmap/ic_launcher');
+    const iosInit = DarwinInitializationSettings();
+    const initSettings = InitializationSettings(android: androidInit, iOS: iosInit);
+    
+    await _localNotifications.initialize(
+      initSettings,
+      onDidReceiveNotificationResponse: _onNotificationTap,
+    );
+
+    // 3. Background Handler
+    FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
+
+    // 4. Foreground Message Handler
+    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
+      final chatId = message.data['chatId'];
+      final activeChatId = Get.find<WhatsAppService>().activeChatId.value;
+
+      // Smart Notification: Only show if we are NOT currently in this chat
+      if (chatId != null && activeChatId == chatId) {
+        print('[FCM] Silent notification, user is currently in chat $chatId');
+        return; // Silent
+      }
+
+      _showLocalNotification(message);
+    });
+
+    // 5. Handle tapping on a background notification when app opens
+    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
+      _handleNotificationClick(message.data);
+    });
+
+    // 6. Check if app was opened from a terminated state via a notification
+    final initialMessage = await _messaging.getInitialMessage();
+    if (initialMessage != null) {
+      Future.delayed(const Duration(seconds: 1), () {
+        _handleNotificationClick(initialMessage.data);
+      });
+    }
+
+    return this;
+  }
+
+  void _showLocalNotification(RemoteMessage message) {
+    final notification = message.notification;
+    if (notification == null) return;
+
+    const androidDetails = AndroidNotificationDetails(
+      'whatsapp_channel',
+      'WhatsApp Messages',
+      importance: Importance.max,
+      priority: Priority.high,
+      ticker: 'ticker',
+    );
+    const iosDetails = DarwinNotificationDetails();
+    const details = NotificationDetails(android: androidDetails, iOS: iosDetails);
+
+    _localNotifications.show(
+      notification.hashCode,
+      notification.title,
+      notification.body,
+      details,
+      payload: jsonEncode(message.data),
+    );
+  }
+
+  void _onNotificationTap(NotificationResponse response) {
+    if (response.payload != null) {
+      final data = jsonDecode(response.payload!);
+      _handleNotificationClick(data);
+    }
+  }
+
+  void _handleNotificationClick(Map<String, dynamic> data) {
+    final chatId = data['chatId'];
+    final name = data['name'] ?? 'Chat';
+    
+    if (chatId != null) {
+      // Mock a conversation model to navigate to ChatScreen
+      final dummyChat = ConversationModel(
+        id: chatId,
+        name: name,
+        isGroup: false,
+        unreadCount: 0,
+        timestamp: 0,
+        pinned: false,
+        isMuted: false,
+      );
+      
+      Get.to(() => ChatScreen(conversation: dummyChat));
+    }
+  }
+}

whatsapp_app/lib/services/whatsapp_service.dart

@@ -11,6 +11,7 @@ class WhatsAppService extends GetxService {
   final status    = WsStatus.disconnected.obs;
   final qrData    = Rx<String?>(null);
   final isWaReady = false.obs;
+  final activeChatId = Rx<String?>(null);
 
   // ── Internal ─────────────────────────────────────────────────────────────
   WebSocketChannel? _channel;