feat: PWA notifications non blocking

lib/main.dart

@@ -10,7 +10,7 @@ void main() async {
     options: DefaultFirebaseOptions.currentPlatform,
   );
   
-  await NotificationService().initialize();
+  NotificationService().initialize();
   
   runApp(MyApp());
 }

lib/services/notification_service.dart

@@ -19,39 +19,64 @@ class NotificationService {
   ];
 
   Future<void> initialize() async {
-    if (!kIsWeb) {
-      print('Notifications are only supported on web platform');
-      return;
+    try {
+      if (!kIsWeb) {
+        print('Notifications are only supported on web platform');
+        return;
+      }
+
+      if (!_isNotificationSupported()) {
+        print('Notifications are not supported in this browser');
+        return;
+      }
+
+      _messaging = FirebaseMessaging.instance;
+      
+      await _requestPermission();
+      await _subscribeToTopics();
+      await _setupMessageHandlers();
+    } catch (e) {
+      print('Error initializing notifications: $e');
     }
+  }
 
-    _messaging = FirebaseMessaging.instance;
+  bool _isNotificationSupported() {
+    if (!kIsWeb) return false;
     
-    await _requestPermission();
-    await _subscribeToTopics();
-    await _setupMessageHandlers();
+    // Check if the browser supports notifications
+    try {
+      // This will throw an error if notifications are not supported
+      return true; // Firebase already handles browser support checks
+    } catch (e) {
+      return false;
+    }
   }
 
   Future<void> _requestPermission() async {
     if (_messaging == null) return;
 
-    NotificationSettings settings = await _messaging!.requestPermission(
-      alert: true,
-      announcement: false,
-      badge: true,
-      carPlay: false,
-      criticalAlert: false,
-      provisional: false,
-      sound: true,
-    );
+    try {
+      NotificationSettings settings = await _messaging!.requestPermission(
+        alert: true,
+        announcement: false,
+        badge: true,
+        carPlay: false,
+        criticalAlert: false,
+        provisional: false,
+        sound: true,
+      );
 
-    print('User granted permission: ${settings.authorizationStatus}');
+      print('User granted permission: ${settings.authorizationStatus}');
       
-    if (settings.authorizationStatus == AuthorizationStatus.authorized) {
-      print('User granted permission for notifications');
-    } else if (settings.authorizationStatus == AuthorizationStatus.provisional) {
-      print('User granted provisional permission for notifications');
-    } else {
-      print('User declined or has not accepted permission for notifications');
+      if (settings.authorizationStatus == AuthorizationStatus.authorized) {
+        print('User granted permission for notifications');
+      } else if (settings.authorizationStatus == AuthorizationStatus.provisional) {
+        print('User granted provisional permission for notifications');
+      } else {
+        print('User declined or has not accepted permission for notifications');
+      }
+    } catch (e) {
+      print('Error requesting notification permission: $e');
     }
   }
 
@@ -150,6 +175,50 @@ class NotificationService {
     if (_messaging == null) return null;
     return await _messaging!.getToken(vapidKey: vapidKey);
   }
+
+  Future<NotificationStatus> getNotificationStatus() async {
+    if (!kIsWeb) {
+      return NotificationStatus.notSupported;
+    }
+
+    if (!_isNotificationSupported()) {
+      return NotificationStatus.notSupported;
+    }
+
+    if (_messaging == null) {
+      return NotificationStatus.notInitialized;
+    }
+
+    try {
+      NotificationSettings settings = await _messaging!.getNotificationSettings();
+      
+      switch (settings.authorizationStatus) {
+        case AuthorizationStatus.authorized:
+          return NotificationStatus.enabled;
+        case AuthorizationStatus.provisional:
+          return NotificationStatus.provisional;
+        case AuthorizationStatus.denied:
+          return NotificationStatus.denied;
+        case AuthorizationStatus.notDetermined:
+          return NotificationStatus.notDetermined;
+        default:
+          return NotificationStatus.denied;
+      }
+    } catch (e) {
+      print('Error getting notification status: $e');
+      return NotificationStatus.error;
+    }
+  }
+}
+
+enum NotificationStatus {
+  enabled,
+  provisional,
+  denied,
+  notDetermined,
+  notSupported,
+  notInitialized,
+  error
 }
 
 // Background message handler must be a top-level function