Initial commit

lib/utils/sign_in_flows/sso_login.dart

@@ -0,0 +1,74 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'package:tatchat/l10n/l10n.dart';
+import 'package:tatchat/utils/platform_infos.dart';
+import 'package:tatchat/utils/sign_in_flows/calc_redirect_url.dart';
+import 'package:tatchat/widgets/adaptive_dialogs/show_modal_action_popup.dart';
+import 'package:flutter_web_auth_2/flutter_web_auth_2.dart';
+import 'package:material_ui/material_ui.dart';
+import 'package:matrix/matrix.dart';
+
+Future<void> ssoLoginFlow(
+  Client client,
+  BuildContext context,
+  bool signUp,
+  List<LoginFlow> loginFlows,
+) async {
+  final (redirectUrl, urlScheme) = calcRedirectUrl(withAuthHtmlPath: true);
+
+  Logs().i('Starting legacy SSO Flow with redirect URL', redirectUrl);
+
+  final ssoProviders =
+      (loginFlows
+                  .firstWhere((flow) => flow.type == 'm.login.sso')
+                  .additionalProperties['identity_providers']
+              as List?)
+          ?.map(
+            (json) => (
+              name: json['name'] as String,
+              id: json['id'] as String,
+              brand: json['brand'] as String?,
+              icon: json['icon'] as String?,
+            ),
+          )
+          .toList();
+
+  final provider = ssoProviders == null
+      ? null
+      : await showModalActionPopup(
+          context: context,
+          title: L10n.of(context).logInTo(client.homeserver!.host),
+          actions: ssoProviders
+              .map(
+                (provider) =>
+                    AdaptiveModalAction(label: provider.name, value: provider),
+              )
+              .toList(),
+        );
+
+  final url = client.homeserver!.replace(
+    path:
+        '/_matrix/client/v3/login/sso/redirect${provider == null ? '' : '/${provider.id}'}',
+    queryParameters: {
+      'redirectUrl': redirectUrl.toString(),
+      'action': signUp ? 'register' : 'login',
+    },
+  );
+
+  final result = await FlutterWebAuth2.authenticate(
+    url: url.toString(),
+    callbackUrlScheme: urlScheme,
+    options: FlutterWebAuth2Options(useWebview: PlatformInfos.isMobile),
+  );
+  final token = Uri.parse(result).queryParameters['loginToken'];
+  if (token?.isEmpty ?? false) return;
+
+  await client.login(
+    LoginType.mLoginToken,
+    token: token,
+    initialDeviceDisplayName: PlatformInfos.appDisplayName,
+  );
+}