Show helpful toast if someone hits a 404

frontend/lib/services/chat_service.dart

@@ -20,7 +20,8 @@ class ChatService {
       return await api.post(
           'agent/tasks/$taskId/steps', stepRequestBody.toJson());
     } catch (e) {
-      throw Exception('Failed to execute step: $e');
+      // TODO: We are bubbling up the full response. Revisit this.
+      rethrow;
     }
   }
 

frontend/lib/services/task_service.dart

@@ -19,7 +19,8 @@ class TaskService {
     try {
       return await api.post('agent/tasks', taskRequestBody.toJson());
     } catch (e) {
-      throw Exception('Failed to create a new task: $e');
+      // TODO: We are bubbling up the full response. Revisit this.
+      rethrow;
     }
   }
 

frontend/lib/utils/rest_api_utility.dart

@@ -50,7 +50,9 @@ class RestApiUtility {
     if (response.statusCode == 200 || response.statusCode == 201) {
       return json.decode(response.body);
     } else {
-      throw Exception('Failed to post data');
+      // TODO: We are bubbling up the full response to show better errors on the UI.
+      // Let's put some thought into how we would like to structure this.
+      throw response;
     }
   }
 
@@ -66,8 +68,6 @@ class RestApiUtility {
     if (response.statusCode == 200 || response.statusCode == 201) {
       return json.decode(response.body);
     } else {
-      print(response.statusCode);
-      print(response.body);
       throw Exception('Failed to update data with PUT request');
     }
   }

frontend/lib/viewmodels/chat_viewmodel.dart

@@ -166,9 +166,9 @@ class ChatViewModel with ChangeNotifier {
       }
 
       print("Chats added for task ID: $_currentTaskId");
-    } catch (error) {
+    } catch (e) {
-      // TODO: Bubble up errors to UI
+      // TODO: We are bubbling up the full response. Revisit this.
-      print("Error sending chat: $error");
+      rethrow;
       // TODO: Handle additional error scenarios or log them as required
     } finally {
       _isWaitingForAgentResponse = false;

frontend/lib/viewmodels/task_viewmodel.dart

@@ -26,6 +26,7 @@ class TaskViewModel with ChangeNotifier {
 
   /// Adds a task and returns its ID.
   Future<String> createTask(String title) async {
+    try {
       final newTask = TaskRequestBody(input: title);
       // Add to data source
       final createdTask = await _taskService.createTask(newTask);
@@ -38,7 +39,11 @@ class TaskViewModel with ChangeNotifier {
       final taskId = newTaskObject.id;
       print("Task $taskId created successfully!");
 
-    return newTaskObject.id; // Return the ID of the new task
+      return newTaskObject.id;
+    } catch (e) {
+      // TODO: We are bubbling up the full response. Revisit this.
+      rethrow;
+    }
   }
 
   /// Deletes a task.

frontend/lib/views/chat/chat_view.dart

@@ -8,7 +8,9 @@ import 'package:auto_gpt_flutter_client/views/chat/loading_indicator.dart';
 import 'package:auto_gpt_flutter_client/views/chat/user_message_tile.dart';
 import 'package:flutter/material.dart';
 import 'package:auto_gpt_flutter_client/viewmodels/chat_viewmodel.dart';
+import 'package:fluttertoast/fluttertoast.dart';
 import 'package:provider/provider.dart';
+import 'package:http/http.dart' as http;
 
 class ChatView extends StatefulWidget {
   final ChatViewModel viewModel;
@@ -118,21 +120,40 @@ class _ChatViewState extends State<ChatView> {
             padding: const EdgeInsets.all(8.0),
             child: ChatInputField(
               onSendPressed: (message) async {
+                try {
                   if (widget.viewModel.currentTaskId != null) {
                     widget.viewModel.sendChatMessage(
                         (message == "") ? null : message,
-                      continuousModeSteps:
+                        continuousModeSteps: Provider.of<SettingsViewModel>(
-                          Provider.of<SettingsViewModel>(context, listen: false)
+                                context,
+                                listen: false)
                             .continuousModeSteps);
                   } else {
                     String newTaskId = await taskViewModel.createTask(message);
                     widget.viewModel.setCurrentTaskId(newTaskId);
                     widget.viewModel.sendChatMessage(
                         (message == "") ? null : message,
-                      continuousModeSteps:
+                        continuousModeSteps: Provider.of<SettingsViewModel>(
-                          Provider.of<SettingsViewModel>(context, listen: false)
+                                context,
+                                listen: false)
                             .continuousModeSteps);
                   }
+                } catch (response) {
+                  if (response is http.Response && response.statusCode == 404) {
+                    Fluttertoast.showToast(
+                        msg:
+                            "404 error: Please ensure the correct baseURL for your agent in \nthe settings and that your agent adheres to the agent protocol.",
+                        toastLength: Toast.LENGTH_LONG,
+                        gravity: ToastGravity.TOP,
+                        timeInSecForIosWeb: 5,
+                        backgroundColor: Colors.red,
+                        webPosition: "center",
+                        webBgColor:
+                            "linear-gradient(to right, #dc1c13, #dc1c13)",
+                        textColor: Colors.white,
+                        fontSize: 16.0);
+                  }
+                }
               },
               onContinuousModePressed: () {
                 widget.viewModel.isContinuousMode =

frontend/pubspec.lock

@@ -192,6 +192,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  fluttertoast:
+    dependency: "direct main"
+    description:
+      name: fluttertoast
+      sha256: "474f7d506230897a3cd28c965ec21c5328ae5605fc9c400cd330e9e9d6ac175c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.2.2"
   google_identity_services_web:
     dependency: transitive
     description:

frontend/pubspec.yaml

@@ -46,6 +46,7 @@ dependencies:
   google_sign_in: ^6.1.5
   uuid: ^4.0.0
   url_launcher: ^6.1.14
+  fluttertoast: ^8.2.2
 
 dev_dependencies:
   flutter_test: