TF-297 Store language selected when user changed

lib/features/manage_account/domain/repository/manage_account_repository.dart

@@ -1,3 +1,5 @@
+import 'dart:ui';
+
 import 'package:jmap_dart_client/jmap/account_id.dart';
 import 'package:jmap_dart_client/jmap/core/properties/properties.dart';
 import 'package:jmap_dart_client/jmap/identities/identity.dart';
@@ -13,4 +15,6 @@ abstract class ManageAccountRepository {
   Future<bool> deleteIdentity(AccountId accountId, IdentityId identityId);
 
   Future<bool> editIdentity(AccountId accountId, EditIdentityRequest editIdentityRequest);
+
+  Future<void> persistLanguage(Locale localeCurrent);
 }

lib/features/manage_account/domain/state/save_language_app_state.dart

@@ -0,0 +1,26 @@
+import 'package:core/core.dart';
+
+class SavingLanguageApp extends UIState {
+
+  SavingLanguageApp();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class SaveLanguageAppSuccess extends UIState {
+
+  SaveLanguageAppSuccess();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class SaveLanguageAppFailure extends FeatureFailure {
+  final dynamic exception;
+
+  SaveLanguageAppFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}

lib/features/manage_account/domain/usecases/save_language_app_interactor.dart

@@ -0,0 +1,24 @@
+import 'dart:core';
+import 'dart:ui';
+
+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/manage_account/domain/repository/manage_account_repository.dart';
+import 'package:tmail_ui_user/features/manage_account/domain/state/save_language_app_state.dart';
+
+class SaveLanguageAppInteractor {
+  final ManageAccountRepository manageAccountRepository;
+
+  SaveLanguageAppInteractor(this.manageAccountRepository);
+
+  Stream<Either<Failure, Success>> execute(Locale localeCurrent) async* {
+    try {
+      yield Right(SavingLanguageApp());
+      await manageAccountRepository.persistLanguage(localeCurrent);
+      yield Right(SaveLanguageAppSuccess());
+    } catch (exception) {
+      yield Left(SaveLanguageAppFailure(exception));
+    }
+  }
+}