Daily commit

lib/bloc/authentication/auth_bloc.dart

@@ -0,0 +1,82 @@
+import 'package:app_gaslieferung/bloc/authentication/auth_event.dart';
+import 'package:app_gaslieferung/bloc/authentication/auth_state.dart';
+import 'package:app_gaslieferung/bloc/message_wrapper/message_bloc.dart';
+import 'package:app_gaslieferung/bloc/message_wrapper/message_event.dart';
+import 'package:app_links/app_links.dart';
+import 'package:bloc/bloc.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+import '../../exceptions/login.dart';
+import '../../util/login.dart';
+
+class AuthBloc extends Bloc<AuthEvent, AuthState> {
+  final _appLinks = AppLinks();
+  final MessageBloc msgBloc;
+  final String url;
+
+  AuthBloc({required this.url, required this.msgBloc}) : super(UnauthenticatedState()) {
+    on<AuthLoginEvent>(_onLoginEvent);
+    on<AuthLogoutEvent>(_onLogoutEvent);
+    on<AuthFailedEvent>(_onFailedEvent);
+    on<AuthLoginSuccessEvent>(_onLoginSuccessEvent);
+
+    _initDeepLinks();
+  }
+
+  void _initDeepLinks() async {
+    // Listen to the stream if any further deeplink is coming in.
+    _appLinks.uriLinkStream.listen((uri) {
+      _handleDeepLink(uri);
+    });
+  }
+
+  /// Handle Deeplink if login request is coming in.
+  void _handleDeepLink(Uri uri) {
+    if (state is UnauthenticatedState) {
+      try {
+        add(AuthLoginSuccessEvent(getSessionIdFromUrl(uri)));
+      } on LoginInvalidUrlException catch (e) {
+        msgBloc.add(MessageShow(message: e.toString()));
+      } on LoginNoSessionIdException catch (e) {
+        msgBloc.add(MessageShow(message: e.toString()));
+      } catch (e, st) {
+        debugPrint("Fehler beim Login. Stacktrace: $st");
+        debugPrint("Fehler beim Login. Message: $e");
+
+        add(
+          AuthFailedEvent(
+            message:
+            "Es ist ein unbekannter Fehler aufgetreten. Versuchen Sie es später erneut oder wenden Sie sich an die Zentrale.",
+          ),
+        );
+      }
+    } else {
+      // TODO: handle message if user is already logged in
+      debugPrint("NOT STATE");
+      debugPrint("$state");
+    }
+  }
+
+  void _onLoginSuccessEvent(
+    AuthLoginSuccessEvent event,
+    Emitter<AuthState> emit,
+  ) {
+    emit(AuthenticatedState(sessionId: event.sessionId));
+  }
+
+  void _onLoginEvent(AuthLoginEvent event, Emitter<AuthState> emit) async {
+    await launchUrl(
+      Uri.parse(url),
+      mode: LaunchMode.externalApplication,
+    );
+  }
+
+  void _onLogoutEvent(AuthLogoutEvent event, Emitter<AuthState> emit) {
+
+  }
+
+  void _onFailedEvent(AuthFailedEvent event, Emitter<AuthState> emit) {
+    emit(UnauthenticatedState());
+  }
+}