TF-439 Handle get stored device id

lib/features/push_notification/domain/exceptions/fcm_exception.dart

@@ -6,4 +6,6 @@ class NotFoundStateToRefreshException implements Exception {}
 
 class NotFoundEmailDeliveryStateException implements Exception {}
 
-class NotFoundFirebaseSubscriptionException implements Exception {}
+class NotFoundFirebaseSubscriptionException implements Exception {}
+
+class NotFoundDeviceIdException implements Exception {}

lib/features/push_notification/domain/repository/fcm_repository.dart

@@ -34,4 +34,6 @@ abstract class FCMRepository {
   Future<FirebaseSubscription> getFirebaseSubscriptionByDeviceId(String deviceId);
 
   Future<FirebaseSubscription> registerNewToken(RegisterNewTokenRequest newTokenRequest);
+
+  Future<String> getDeviceId();
 }

lib/features/push_notification/domain/state/get_device_id_state.dart

@@ -0,0 +1,24 @@
+
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class GetDeviceIdLoading extends UIState {}
+
+class GetDeviceIdSuccess extends UIState {
+
+  final String deviceId;
+
+  GetDeviceIdSuccess(this.deviceId);
+
+  @override
+  List<Object> get props => [deviceId];
+}
+
+class GetDeviceIdFailure extends FeatureFailure {
+  final dynamic exception;
+
+  GetDeviceIdFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}

lib/features/push_notification/domain/usecases/get_device_id_interactor.dart

@@ -0,0 +1,21 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:tmail_ui_user/features/push_notification/domain/repository/fcm_repository.dart';
+import 'package:tmail_ui_user/features/push_notification/domain/state/get_device_id_state.dart';
+
+class GetDeviceIdInteractor {
+  final FCMRepository _fcmRepository;
+
+  GetDeviceIdInteractor(this._fcmRepository);
+
+  Stream<Either<Failure, Success>> execute() async* {
+    try {
+      yield Right<Failure, Success>(GetDeviceIdLoading());
+      final deviceId = await _fcmRepository.getDeviceId();
+      yield Right<Failure, Success>(GetDeviceIdSuccess(deviceId));
+    } catch (e) {
+      yield Left<Failure, Success>(GetDeviceIdFailure(e));
+    }
+  }
+}