TF-4145 Implement get oidc user_info from endpoint of oidc configuration

lib/features/login/domain/repository/authentication_oidc_repository.dart

@@ -46,4 +46,6 @@ abstract class AuthenticationOIDCRepository {
   Future<String> getAuthenticationInfo();
 
   Future<void> removeAuthDestinationUrl();
+
+  Future<OidcUserInfo> fetchUserInfo(String userInfoEndpoint);
 }

lib/features/login/domain/state/get_oidc_user_info_state.dart

@@ -0,0 +1,18 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:model/oidc/response/oidc_user_info.dart';
+
+class GettingOidcUserInfo extends LoadingState {}
+
+class GetOidcUserInfoSuccess extends UIState {
+  final OidcUserInfo oidcUserInfo;
+
+  GetOidcUserInfoSuccess(this.oidcUserInfo);
+
+  @override
+  List<Object> get props => [oidcUserInfo];
+}
+
+class GetOidcUserInfoFailure extends FeatureFailure {
+  GetOidcUserInfoFailure(dynamic exception) : super(exception: exception);
+}

lib/features/login/domain/usecases/get_oidc_user_info_interactor.dart

@@ -0,0 +1,37 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:model/oidc/oidc_configuration.dart';
+import 'package:tmail_ui_user/features/login/data/network/oidc_error.dart';
+import 'package:tmail_ui_user/features/login/domain/repository/authentication_oidc_repository.dart';
+import 'package:tmail_ui_user/features/login/domain/state/get_oidc_user_info_state.dart';
+
+class GetOidcUserInfoInteractor {
+  final AuthenticationOIDCRepository _authenticationOIDCRepository;
+
+  GetOidcUserInfoInteractor(this._authenticationOIDCRepository);
+
+  Stream<Either<Failure, Success>> execute(OIDCConfiguration config) async* {
+    try {
+      yield Right<Failure, Success>(GettingOidcUserInfo());
+
+      final oidcDiscoveryResponse =
+          await _authenticationOIDCRepository.discoverOIDC(config);
+
+      final userInfoEndpoint = oidcDiscoveryResponse.userInfoEndpoint;
+
+      if (userInfoEndpoint != null) {
+        final oidcUserInfo =
+            await _authenticationOIDCRepository.fetchUserInfo(userInfoEndpoint);
+
+        yield Right<Failure, Success>(GetOidcUserInfoSuccess(oidcUserInfo));
+      } else {
+        yield Left<Failure, Success>(
+          GetOidcUserInfoFailure(NotFoundUserInfoEndpointException()),
+        );
+      }
+    } catch (e) {
+      yield Left<Failure, Success>(GetOidcUserInfoFailure(e));
+    }
+  }
+}