[huawei_push] support both FCM and Push Kit in same Flutter APP .

[Joseph-Nathan]

Description My application already includes the FCM push notification services , I'd like to support both FCM and Push Kit on supported devices.

Expected behavior FCM push notification services work with not hms devices , and huawei_push work with hms devices .

Current behavior FCM push notification services work with not hms devices

Environment

• Platform: [Flutter]
• Kit: [Push]
• OS Version [Android 11]

Other can provide any doc to support both FCM and Push Kit in same Flutter app .

[fatihergin]

The both FCM and HMS push sevices have "almost" the same methods/callbacks in terms of handling push actions.

You can just implement them separately, and init the correct one on app start.

huawei_hmsavailability can be used to choose the supported push notification service to init.

To make the above comment more clear:

1. Create an abstract class which will handle the notification actions:

abstract class PushNotificationService {

  void initialize();

  Future<void> requestToken(Function(String? token) callback);

  void onForegroundMessage(NotificationMessage message) {
   print('onForegroundMessage: $message');
  }

  void onMessageOpenedApp(NotificationMessage message) {
    print('onMessageOpenedApp: $message');
  }
}

// top-level func.
void onBackgroundMessage(NotificationMessage message) {
  print('onMessageOpenedApp: $message');
}

class NotificationMessage {
  const NotificationMessage({
    this.title,
    this.message,
    this.data = const <String, dynamic>{},
  });

  final String? title;
  final String? message;
  final Map<String, dynamic> payload;
}

2. Extend PushNotificationService for the both push services, and implement required methods:

class FcmPushNotificationService extends PushNotificationService {
  final FirebaseMessaging _fcm = FirebaseMessaging.instance;

  @override
  Future initialize() async {
    await _fcm.requestPermission();

    await _fcm.setForegroundNotificationPresentationOptions(
      alert: false,
      badge: false,
      sound: false,
    );

    FirebaseMessaging.onMessage.listen(_onMessage);

    // ...
  }

  void _onMessage(RemoteMessage message) {
    // notify PushNotificationService
    onForegroundMessage(message.toPushNotificationMessage()); // toPushNotificationMessage RemoteMessage extension 
  }

  // ...
}

class HmsPushNotificationService extends PushNotificationService {
    // ...
}

3. Choose the supported push service and init (second part of this step can be moved into a factory method in PushNotificationService):

late final PushNotificationService pushNotificationService;

final isHmsAvailable = ...  // please check for huawei_hmsavailability (or another alternative)

if(isHmsAvailable) {
    pushNotificationService = HmsPushNotificationService();
} else {
    pushNotificationService = FcmPushNotificationService();
}

4. Use it whereever you want:

e.g. request push token:

pushNotificationService.requestToken().then((token) => print('Push token: $token'));

[Joseph-Nathan]

@fatihergin thanks for you reply , But it's client side , the problem in my server side , I used cloud functions to send data message to multi devices , same that Huawei devices does n' t get the Data Message from my cloud , because it send messages in cloud functions by fcm , in selotion to Handel it server side before we used your last comment ,

Thanks bro.

[fatihergin]

Well, the issue is not clear to me anymore.

Did you have a look on sample hms server demos?

Can you narrow the issue down a bit?

[Joseph-Nathan]

@fatihergin thanks , hms push server by node.js that i need . now i have array of devices tokens (ios device , gms devices , hms devices ), is there in idea to get tokens hms devices only ,

i want used push kit to hms tokens , and fcm to another tokens . now i used i used fcm to send to all tokens and that do n't work with hms devices . thanks for your help .

[fatihergin]

What about sending supported push notification service info to your server along with push token? Then, your server can choose the right push notification service to send pushes.

[Joseph-Nathan]

@fatihergin are you mean save when I store the user token , i should store if it hmsSupport , So that when I send to that token I can choose to use push kit or not . or you mean something else ?