New code verification service

frontend/pshared/lib/provider/account.dart

@@ -7,6 +7,8 @@ import 'package:pshared/api/requests/signup.dart';
 import 'package:pshared/api/requests/login_data.dart';
 import 'package:pshared/config/constants.dart';
 import 'package:pshared/models/account/account.dart';
+import 'package:pshared/models/auth/login_outcome.dart';
+import 'package:pshared/models/auth/pending_login.dart';
 import 'package:pshared/models/describable.dart';
 import 'package:pshared/models/storable.dart';
 import 'package:pshared/provider/locale.dart';
@@ -23,8 +25,10 @@ class AccountProvider extends ChangeNotifier {
   Resource<Account?> _resource = Resource(data: null);
   Resource<Account?> get resource => _resource;
   late LocaleProvider _localeProvider;
+  PendingLogin? _pendingLogin;
 
   Account? get account => _resource.data;
+  PendingLogin? get pendingLogin => _pendingLogin;
   bool get isLoggedIn => account != null;
   bool get isLoading => _resource.isLoading;
   Object? get error => _resource.error;
@@ -57,27 +61,38 @@ class AccountProvider extends ChangeNotifier {
 
   void _pickupLocale(String locale) => _localeProvider.setLocale(Locale(locale));
 
-  Future<Account> login({
+  Future<LoginOutcome> login({
     required String email,
     required String password,
     required String locale,
   }) async {
     _setResource(_resource.copyWith(isLoading: true, error: null));
     try {
-      final acc = await AccountService.login(LoginData.build(
+      final outcome = await AccountService.login(LoginData.build(
         login: email,
         password: password,
         locale: locale,
       ));
-      _setResource(Resource(data: acc, isLoading: false));
-      _pickupLocale(acc.locale);
-      return acc;
+      if (outcome.account != null) {
+        _setResource(Resource(data: outcome.account, isLoading: false));
+        _pickupLocale(outcome.account!.locale);
+      } else {
+        _pendingLogin = outcome.pending;
+        _setResource(_resource.copyWith(isLoading: false));
+      }
+      return outcome;
     } catch (e) {
       _setResource(_resource.copyWith(isLoading: false, error: toException(e)));
       rethrow;
     }
   }
 
+  void completePendingLogin(Account account) {
+    _pendingLogin = null;
+    _setResource(Resource(data: account, isLoading: false, error: null));
+    _pickupLocale(account.locale);
+  }
+
   Future<bool> isAuthorizationStored() async => AuthorizationService.isAuthorizationStored();
 
   Future<Account?> restore() async {