DeviceInformationChange class Null safety

The object that changes the device information.

The device information change can be used to

• modify the name of the device and/or
• modify its Firebase registration token or
• disable push notifications.

If neither name or fcmRegistrationToken are provided, the provided onSuccess function will be called when execute is invoked.

Usage example for changing device information:

  [...]
  Future<void> updateDeviceInformation({
    required MobileAuthenticationClient client,
    required String newName,
    required String fcmToken,
  }) async {
    await client.operations.deviceInformationChange
      .name(newName)
      .fcmRegistrationToken(fcmToken)
      .onSuccess(() {
        // handle success
      })
      .onError((error) {
        // handle error
      })
      .execute();
  }
  [...]

Synchronization with retry policy

The retry policy can be useful when updating the Firebase Cloud Messaging token. But since it is not known when the token will be updated, synchronization is necessary and should be done by the caller. Below a sample code is provided that solves the synchronization using the queue library and Completer.

import 'dart:async';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:queue/queue.dart';

class SampleAppMessagingService {
  final Queue _queue = Queue();

  SampleAppMessagingService() {
    FirebaseMessaging.instance.onTokenRefresh.listen((token) {
      _queue.add(() {
        return _processNewToken(token, client);
      });
    });
  }

  Future<void> _processNewToken(
    MobileAuthenticationClient client,
    String fcmToken,
  ) async {
    final completer = Completer();
    ConstantRetryPolicy retryPolicy = ConstantRetryPolicy(
      maxRetries: 5,
      delayInSeconds: const Duration(seconds: 5),
    );
    client.operations.deviceInformationChange
      .fcmRegistrationToken(fcmToken)
      .retryPolicy(retryPolicy)
      .onSuccess(() {
        // Firebase registration token successfully updated
        completer.complete();
      })
      .onError((error) {
        // handle unsuccessful update
        completer.completeError(error);
      })
      .execute()
      .catchError((e) {

    return completer.future;
  }
}