platform/lib/browser.dart
2017-03-28 21:52:19 -04:00

86 lines
2.6 KiB
Dart

/// Browser library for the Angel framework.
library angel_client.browser;
import 'dart:async' show Future, Stream, StreamController, Timer;
import 'dart:convert' show JSON;
import 'dart:html' show CustomEvent, window;
import 'package:http/browser_client.dart' as http;
import 'angel_client.dart';
// import 'auth_types.dart' as auth_types;
import 'base_angel_client.dart';
export 'angel_client.dart';
/// Queries an Angel server via REST.
class Rest extends BaseAngelClient {
Rest(String basePath) : super(new http.BrowserClient(), basePath);
@override
Future<AngelAuthResult> authenticate(
{String type,
credentials,
String authEndpoint: '/auth',
String reviveEndpoint: '/auth/token'}) async {
if (type == null) {
if (!window.localStorage.containsKey('token')) {
throw new Exception(
'Cannot revive token from localStorage - there is none.');
}
try {
final result = await super.authenticate(
type: null,
credentials: {'token': JSON.decode(window.localStorage['token'])},
reviveEndpoint: reviveEndpoint);
window.localStorage['token'] = JSON.encode(authToken = result.token);
window.localStorage['user'] = JSON.encode(result.data);
return result;
} catch (e, st) {
throw new AngelHttpException(e,
message: 'Failed to revive auth token.', stackTrace: st);
}
} else {
final result = await super.authenticate(
type: type, credentials: credentials, authEndpoint: authEndpoint);
window.localStorage['token'] = JSON.encode(authToken = result.token);
window.localStorage['user'] = JSON.encode(result.data);
return result;
}
}
@override
Stream<String> authenticateViaPopup(String url,
{String eventName: 'token', String errorMessage}) {
var ctrl = new StreamController<String>();
var wnd = window.open(url, 'angel_client_auth_popup');
Timer t;
t = new Timer.periodic(new Duration(milliseconds: 500), (timer) {
if (!ctrl.isClosed) {
if (wnd.closed) {
ctrl.addError(new AngelHttpException.notAuthenticated(
message:
errorMessage ?? 'Authentication via popup window failed.'));
ctrl.close();
timer.cancel();
}
} else
timer.cancel();
});
window.on[eventName ?? 'token'].listen((CustomEvent e) {
if (!ctrl.isClosed) {
ctrl.add(e.detail);
t.cancel();
ctrl.close();
}
});
return ctrl.stream;
}
@override
Future logout() {
window.localStorage.remove('token');
return super.logout();
}
}