Handle invalid credentails

lib/data/models/entities.dart

@@ -2,15 +2,30 @@ import 'package:json_annotation/json_annotation.dart';
 
 part 'entities.g.dart';
 
+
+@JsonSerializable()
+class ErrorResponse extends Object with _$ErrorResponseSerializerMixin {
+
+  final String message;
+
+  ErrorResponse(
+      this.message,
+      );
+
+  factory ErrorResponse.fromJson(Map<String, dynamic> json) => _$ErrorResponseFromJson(json);
+}
+
+
 @JsonSerializable()
 class BaseListResponse extends Object with _$BaseListResponseSerializerMixin {
-  //final String message;
 
   @JsonKey(name: "data")
   final List<dynamic> data;
+  final ErrorResponse error;
 
   BaseListResponse(
       this.data,
+      this.error,
       );
 
   factory BaseListResponse.fromJson(Map<String, dynamic> json) => _$BaseListResponseFromJson(json);
@@ -22,9 +37,11 @@ class BaseItemResponse extends Object with _$BaseItemResponseSerializerMixin {
 
   @JsonKey(name: "data")
   final dynamic data;
+  final ErrorResponse error;
 
   BaseItemResponse(
       this.data,
+      this.error,
       );
 
   factory BaseItemResponse.fromJson(Map<String, dynamic> json) => _$BaseItemResponseFromJson(json);

lib/data/models/entities.g.dart

@@ -6,20 +6,42 @@ part of 'entities.dart';
 // Generator: JsonSerializableGenerator
 // **************************************************************************
 
+ErrorResponse _$ErrorResponseFromJson(Map<String, dynamic> json) =>
+    new ErrorResponse(json['message'] as String);
+
+abstract class _$ErrorResponseSerializerMixin {
+  String get message;
+  Map<String, dynamic> toJson() => <String, dynamic>{'message': message};
+}
+
 BaseListResponse _$BaseListResponseFromJson(Map<String, dynamic> json) =>
-    new BaseListResponse(json['data'] as List);
+    new BaseListResponse(
+        json['data'] as List,
+        json['error'] == null
+            ? null
+            : new ErrorResponse.fromJson(
+                json['error'] as Map<String, dynamic>));
 
 abstract class _$BaseListResponseSerializerMixin {
   List<dynamic> get data;
-  Map<String, dynamic> toJson() => <String, dynamic>{'data': data};
+  ErrorResponse get error;
+  Map<String, dynamic> toJson() =>
+      <String, dynamic>{'data': data, 'error': error};
 }
 
 BaseItemResponse _$BaseItemResponseFromJson(Map<String, dynamic> json) =>
-    new BaseItemResponse(json['data']);
+    new BaseItemResponse(
+        json['data'],
+        json['error'] == null
+            ? null
+            : new ErrorResponse.fromJson(
+                json['error'] as Map<String, dynamic>));
 
 abstract class _$BaseItemResponseSerializerMixin {
   dynamic get data;
-  Map<String, dynamic> toJson() => <String, dynamic>{'data': data};
+  ErrorResponse get error;
+  Map<String, dynamic> toJson() =>
+      <String, dynamic>{'data': data, 'error': error};
 }
 
 CompanyEntity _$CompanyEntityFromJson(Map<String, dynamic> json) =>

lib/data/web_client.dart

@@ -35,26 +35,35 @@ class WebClient {
 
   Future<dynamic> fetchItem(String url, String token) async {
     final http.Response response = await sendGetRequest(url, token);
-    return BaseItemResponse
+    final result = BaseItemResponse.fromJson(json.decode(response.body));
-        .fromJson(json.decode(response.body))
+
-        .data;
+    if (result.error.message != null) {
+      throw(result.error.message);
+    } else {
+      return result.data;
+    }
   }
 
 
   Future<List<dynamic>> fetchList(String url, String token) async {
     final http.Response response = await sendGetRequest(url, token);
-    return BaseListResponse
+    final result = BaseListResponse.fromJson(json.decode(response.body));
-        .fromJson(json.decode(response.body))
-        .data
-        .toList();
-  }
 
+    if (result.error.message != null) {
+      throw(result.error.message);
+    } else {
+      return result.data.toList();
+    }
+  }
 
   Future<List<dynamic>> postList(String url, String token, var data) async {
     final http.Response response = await sendPostRequest(url, token, data);
-    return BaseListResponse
+    final result = BaseListResponse.fromJson(json.decode(response.body));
-        .fromJson(json.decode(response.body))
+
-        .data
+    if (result.error.message != null) {
-        .toList();
+      throw(result.error.message);
+    } else {
+      return result.data.toList();
+    }
   }
 }

lib/redux/auth/auth_actions.dart

@@ -4,7 +4,7 @@ import 'package:invoiceninja/redux/app/app_state.dart';
 import 'package:invoiceninja/data/models/models.dart';
 
 class UserLoginRequest {
-  final dynamic context;
+  final BuildContext context;
   final String email;
   final String password;
   final String url;

lib/redux/auth/auth_middleware.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:redux/redux.dart';
 import 'package:invoiceninja/redux/auth/auth_actions.dart';
@@ -53,8 +54,18 @@ Middleware<AppState> _createLoginRequest(AuthRepository repository) {
 
           Navigator.of(action.context).pushNamed(AppRoutes.dashboard);
         }
-    ).catchError((error) => store.dispatch(UserLoginFailure(error)));
+    ).catchError((error) {
+      store.dispatch(UserLoginFailure(null));
+
+      final snackBar = new SnackBar(
+        duration: Duration(seconds: 3),
+        content: new Text('Error: ' + error.toString()),
+      );
+
+      Scaffold.of(action.context).showSnackBar(snackBar);
+    });
 
     next(action);
   };
 }
+

lib/ui/auth/login.dart

@@ -47,22 +47,24 @@ class _LoginScreenState extends State<LoginScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return StoreConnector<AppState, dynamic>(
-        converter: (Store<AppState> store) {
-      return (BuildContext context, String email, String password, String url) {
-        store.dispatch(UserLoginRequest(context, email, password, url));
-      };
-    }, builder: (BuildContext context, loginAction) {
     return Scaffold(
         body: Form(
       key: _formKey,
-          child: ListView(
+      child:
+          StoreConnector<AppState, dynamic>(converter: (Store<AppState> store) {
+        return (BuildContext context, String email, String password,
+            String url) {
+          store.dispatch(UserLoginRequest(context, email, password, url));
+        };
+      }, builder: (BuildContext context, loginAction) {
+        return ListView(
           shrinkWrap: true,
           padding: EdgeInsets.only(left: 24.0, right: 24.0, top: 40.0),
           children: [
             Padding(
               padding: EdgeInsets.only(top: 20.0, bottom: 20.0),
-                child: new Image.asset('assets/images/logo.png', width: 100.0, height: 100.0),
+              child: new Image.asset('assets/images/logo.png',
+                  width: 100.0, height: 100.0),
             ),
             TextFormField(
               controller: _emailTextController,
@@ -83,8 +85,7 @@ class _LoginScreenState extends State<LoginScreen> {
             TextFormField(
               controller: _urlTextController,
               decoration: InputDecoration(labelText: 'URL'),
-                validator: (val) =>
+              validator: (val) => val.isEmpty ? 'Please enter your URL.' : null,
-                    val.isEmpty ? 'Please enter your URL.' : null,
               onSaved: (val) => _url = val,
             ),
             Padding(
@@ -101,15 +102,13 @@ class _LoginScreenState extends State<LoginScreen> {
                     //Navigator.of(context).pushNamed(HomeScreen.tag);
                   },
                   color: Colors.lightBlueAccent,
-                    child:
+                  child: Text('LOGIN', style: TextStyle(color: Colors.white)),
-                        Text('LOGIN', style: TextStyle(color: Colors.white)),
                 ),
               ),
             ),
           ],
-          ),
-        ),
         );
-    });
+      }),
+    ));
   }
 }