First commit

lib/services/auth/auth_view_model.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/cupertino.dart';
+import 'package:sampleapp/services/auth/auth.dart';
+
+class AuthViewModel extends ChangeNotifier {
+  final AuthService authService;
+  bool loggingIn = false;
+  bool loggingOut = false;
+
+  AuthViewModel(this.authService);
+
+  Future<bool> login() {
+    return Future.delayed(Duration.zero, () async {
+      loggingIn = true;
+      notifyListeners();
+      await authService.login();
+      loggingIn = false;
+      notifyListeners();
+      return authService.isLoggedIn();
+    });
+  }
+
+  Future<bool> logout() async {
+    loggingOut = true;
+    notifyListeners();
+    await authService.logout();
+    loggingOut = false;
+    notifyListeners();
+    return !(await authService.isLoggedIn());
+  }
+}