Add notification

lib/services/notification_service.dart

@@ -0,0 +1,98 @@
+import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:travel_mate/services/logger_service.dart';
+
+class NotificationService {
+  static final NotificationService _instance = NotificationService._internal();
+  factory NotificationService() => _instance;
+  NotificationService._internal();
+
+  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging.instance;
+  final FlutterLocalNotificationsPlugin _localNotifications =
+      FlutterLocalNotificationsPlugin();
+
+  bool _isInitialized = false;
+
+  Future<void> initialize() async {
+    if (_isInitialized) return;
+
+    // Request permissions
+    await _requestPermissions();
+
+    // Initialize local notifications
+    const androidSettings = AndroidInitializationSettings(
+      '@mipmap/ic_launcher',
+    );
+    const iosSettings = DarwinInitializationSettings();
+    const initSettings = InitializationSettings(
+      android: androidSettings,
+      iOS: iosSettings,
+    );
+
+    await _localNotifications.initialize(
+      initSettings,
+      onDidReceiveNotificationResponse: (details) {
+        // Handle notification tap
+        LoggerService.info('Notification tapped: ${details.payload}');
+      },
+    );
+
+    // Handle foreground messages
+    FirebaseMessaging.onMessage.listen(_handleForegroundMessage);
+
+    _isInitialized = true;
+    LoggerService.info('NotificationService initialized');
+  }
+
+  Future<void> _requestPermissions() async {
+    NotificationSettings settings = await _firebaseMessaging.requestPermission(
+      alert: true,
+      badge: true,
+      sound: true,
+    );
+
+    LoggerService.info(
+      'User granted permission: ${settings.authorizationStatus}',
+    );
+  }
+
+  Future<String?> getFCMToken() async {
+    try {
+      return await _firebaseMessaging.getToken();
+    } catch (e) {
+      LoggerService.error('Error getting FCM token: $e');
+      return null;
+    }
+  }
+
+  Future<void> _handleForegroundMessage(RemoteMessage message) async {
+    LoggerService.info('Got a message whilst in the foreground!');
+    LoggerService.info('Message data: ${message.data}');
+
+    if (message.notification != null) {
+      LoggerService.info(
+        'Message also contained a notification: ${message.notification}',
+      );
+
+      // Show local notification
+      const androidDetails = AndroidNotificationDetails(
+        'high_importance_channel',
+        'High Importance Notifications',
+        importance: Importance.max,
+        priority: Priority.high,
+      );
+      const iosDetails = DarwinNotificationDetails();
+      const details = NotificationDetails(
+        android: androidDetails,
+        iOS: iosDetails,
+      );
+
+      await _localNotifications.show(
+        message.hashCode,
+        message.notification?.title,
+        message.notification?.body,
+        details,
+      );
+    }
+  }
+}