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fix(flutter): lazy-access FirebaseMessaging only on mobile to prevent LateInitializationError on Windows desktop

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ssbg04 committed 2026-08-18 16:21:34 +08:00
1 parent 93c737e526
commit f5f29c95d8
1 file changed
+35 -30
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frontend/lib/core/services/fcm_service.dart
+35 -30
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@@ -13,46 +13,51 @@ import 'notification_service.dart';
Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {}
class FcmService {
static final FirebaseMessaging _messaging = FirebaseMessaging.instance;
static bool get _isMobile => !kIsWeb && (Platform.isAndroid || Platform.isIOS);
static Future<void> initialize() async {
if (kIsWeb || !Platform.isAndroid) return;
if (!_isMobile) return;
await _messaging.requestPermission(alert: true, badge: true, sound: true);
try {
final messaging = FirebaseMessaging.instance;
await messaging.requestPermission(alert: true, badge: true, sound: true);
FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);
FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);
// Auto-refresh token with backend whenever FCM rotates the token
_messaging.onTokenRefresh.listen((newToken) {
registerToken();
});
// Auto-refresh token with backend whenever FCM rotates the token
messaging.onTokenRefresh.listen((newToken) {
registerToken();
});
// Foreground: show local notification banner (with deduplication)
FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
final title = message.notification?.title ??
message.data['title']?.toString() ??
'TIS RMS';
final body = message.notification?.body ??
message.data['body']?.toString() ??
'';
int? notifId;
if (message.data['id'] != null && message.data['id'].toString().isNotEmpty) {
notifId = int.tryParse(message.data['id'].toString());
}
if (body.isNotEmpty) {
await NotificationService().showNotification(
id: notifId,
title: title,
body: body,
);
}
});
// Foreground: show local notification banner (with deduplication)
FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
final title = message.notification?.title ??
message.data['title']?.toString() ??
'TIS RMS';
final body = message.notification?.body ??
message.data['body']?.toString() ??
'';
int? notifId;
if (message.data['id'] != null && message.data['id'].toString().isNotEmpty) {
notifId = int.tryParse(message.data['id'].toString());
}
if (body.isNotEmpty) {
await NotificationService().showNotification(
id: notifId,
title: title,
body: body,
);
}
});
} catch (e) {
debugPrint('[FcmService] Init error: $e');
}
}
static Future<void> registerToken() async {
if (kIsWeb || !Platform.isAndroid) return;
if (!_isMobile) return;
try {
final token = await _messaging.getToken();
final token = await FirebaseMessaging.instance.getToken();
if (token == null || token.isEmpty) return;
final prefs = await SharedPreferences.getInstance();