fluffychat/lib/pages/homeserver_picker/homeserver_picker.dart
2022-02-21 07:58:08 +01:00

208 lines
6.4 KiB
Dart

import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:flutter_web_auth/flutter_web_auth.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:matrix/matrix.dart';
import 'package:universal_html/html.dart' as html;
import 'package:vrouter/vrouter.dart';
import 'package:fluffychat/config/app_config.dart';
import 'package:fluffychat/pages/homeserver_picker/homeserver_picker_view.dart';
import 'package:fluffychat/utils/famedlysdk_store.dart';
import 'package:fluffychat/utils/platform_infos.dart';
import 'package:fluffychat/widgets/matrix.dart';
import '../../utils/localized_exception_extension.dart';
class HomeserverPicker extends StatefulWidget {
const HomeserverPicker({Key? key}) : super(key: key);
@override
HomeserverPickerController createState() => HomeserverPickerController();
}
class HomeserverPickerController extends State<HomeserverPicker> {
bool isLoading = false;
String domain = AppConfig.defaultHomeserver;
final TextEditingController homeserverController =
TextEditingController(text: AppConfig.defaultHomeserver);
StreamSubscription? _intentDataStreamSubscription;
String? error;
Timer? _coolDown;
void setDomain(String domain) {
this.domain = domain;
_coolDown?.cancel();
if (domain.isNotEmpty) {
_coolDown =
Timer(const Duration(milliseconds: 500), checkHomeserverAction);
}
}
void _loginWithToken(String token) {
if (token.isEmpty) return;
showFutureLoadingDialog(
context: context,
future: () async {
if (Matrix.of(context).getLoginClient().homeserver == null) {
await Matrix.of(context).getLoginClient().checkHomeserver(
await Store()
.getItem(HomeserverPickerController.ssoHomeserverKey),
);
}
await Matrix.of(context).getLoginClient().login(
LoginType.mLoginToken,
token: token,
initialDeviceDisplayName: PlatformInfos.clientName,
);
},
);
}
@override
void initState() {
super.initState();
checkHomeserverAction();
}
@override
void dispose() {
super.dispose();
_intentDataStreamSubscription?.cancel();
}
String? _lastCheckedHomeserver;
/// Starts an analysis of the given homeserver. It uses the current domain and
/// makes sure that it is prefixed with https. Then it searches for the
/// well-known information and forwards to the login page depending on the
/// login type.
Future<void> checkHomeserverAction() async {
_coolDown?.cancel();
if (_lastCheckedHomeserver == domain) return;
if (domain.isEmpty) throw L10n.of(context)!.changeTheHomeserver;
var homeserver = domain;
if (!homeserver.startsWith('https://')) {
homeserver = 'https://$homeserver';
}
setState(() {
error = _rawLoginTypes = registrationSupported = null;
isLoading = true;
});
try {
await Matrix.of(context).getLoginClient().checkHomeserver(homeserver);
_rawLoginTypes = await Matrix.of(context).getLoginClient().request(
RequestType.GET,
'/client/r0/login',
);
try {
await Matrix.of(context).getLoginClient().register();
registrationSupported = true;
} on MatrixException catch (e) {
registrationSupported = e.requireAdditionalAuthentication;
}
} catch (e) {
setState(() => error = (e).toLocalizedString(context));
} finally {
_lastCheckedHomeserver = domain;
if (mounted) {
setState(() => isLoading = false);
}
}
}
Map<String, dynamic>? _rawLoginTypes;
bool? registrationSupported;
List<IdentityProvider> get identityProviders {
if (!ssoLoginSupported) return [];
final rawProviders = _rawLoginTypes!.tryGetList('flows')!.singleWhere(
(flow) =>
flow['type'] == AuthenticationTypes.sso)['identity_providers'];
final list = (rawProviders as List)
.map((json) => IdentityProvider.fromJson(json))
.toList();
if (PlatformInfos.isCupertinoStyle) {
list.sort((a, b) => a.brand == 'apple' ? -1 : 1);
}
return list;
}
bool get passwordLoginSupported =>
Matrix.of(context)
.client
.supportedLoginTypes
.contains(AuthenticationTypes.password) &&
_rawLoginTypes!
.tryGetList('flows')!
.any((flow) => flow['type'] == AuthenticationTypes.password);
bool get ssoLoginSupported =>
Matrix.of(context)
.client
.supportedLoginTypes
.contains(AuthenticationTypes.sso) &&
_rawLoginTypes!
.tryGetList('flows')!
.any((flow) => flow['type'] == AuthenticationTypes.sso);
static const String ssoHomeserverKey = 'sso-homeserver';
void ssoLoginAction(String id) async {
if (kIsWeb) {
// We store the homserver in the local storage instead of a redirect
// parameter because of possible CSRF attacks.
Store().setItem(ssoHomeserverKey,
Matrix.of(context).getLoginClient().homeserver.toString());
}
final redirectUrl = kIsWeb
? html.window.origin! + '/web/auth.html'
: AppConfig.appOpenUrlScheme.toLowerCase() + '://login';
final url =
'${Matrix.of(context).getLoginClient().homeserver?.toString()}/_matrix/client/r0/login/sso/redirect/${Uri.encodeComponent(id)}?redirectUrl=${Uri.encodeQueryComponent(redirectUrl)}';
final urlScheme = Uri.parse(redirectUrl).scheme;
final result = await FlutterWebAuth.authenticate(
url: url,
callbackUrlScheme: urlScheme,
);
final token = Uri.parse(result).queryParameters['loginToken'];
if (token != null) _loginWithToken(token);
}
void signUpAction() => VRouter.of(context).to(
'signup',
queryParameters: {'domain': domain},
);
@override
Widget build(BuildContext context) {
Matrix.of(context).navigatorContext = context;
return HomeserverPickerView(this);
}
}
class IdentityProvider {
final String? id;
final String? name;
final String? icon;
final String? brand;
IdentityProvider({this.id, this.name, this.icon, this.brand});
factory IdentityProvider.fromJson(Map<String, dynamic> json) =>
IdentityProvider(
id: json['id'],
name: json['name'],
icon: json['icon'],
brand: json['brand'],
);
}