1 files changed, 87 insertions, 0 deletions
diff --git a/frontend/lib/viewmodels/settings_viewmodel.dart b/frontend/lib/viewmodels/settings_viewmodel.dart
new file mode 100644
index 000000000..eb7f246a3
--- /dev/null
+++ b/frontend/lib/viewmodels/settings_viewmodel.dart
@@ -0,0 +1,87 @@
+import 'package:auto_gpt_flutter_client/services/auth_service.dart';
+import 'package:auto_gpt_flutter_client/services/shared_preferences_service.dart';
+import 'package:auto_gpt_flutter_client/utils/rest_api_utility.dart';
+import 'package:flutter/material.dart';
+
+/// [SettingsViewModel] is responsible for managing the state and logic
+/// for the [SettingsView]. It extends [ChangeNotifier] to provide
+/// reactive state management.
+class SettingsViewModel extends ChangeNotifier {
+  bool _isDarkModeEnabled = false; // State for Dark Mode
+  bool _isDeveloperModeEnabled = false; // State for Developer Mode
+  String _baseURL = ''; // State for Base URL
+  int _continuousModeSteps = 1; // State for Continuous Mode Steps
+
+  final RestApiUtility _restApiUtility;
+  final SharedPreferencesService _prefsService;
+
+  // Getters to access the private state variables
+  bool get isDarkModeEnabled => _isDarkModeEnabled;
+  bool get isDeveloperModeEnabled => _isDeveloperModeEnabled;
+  String get baseURL => _baseURL;
+  int get continuousModeSteps => _continuousModeSteps;
+
+  final AuthService _authService = AuthService();
+
+  SettingsViewModel(this._restApiUtility, this._prefsService) {
+    _loadPreferences();
+  }
+
+  // Method to load stored preferences
+  Future<void> _loadPreferences() async {
+    _isDarkModeEnabled =
+        await _prefsService.getBool('isDarkModeEnabled') ?? false;
+    _isDeveloperModeEnabled =
+        await _prefsService.getBool('isDeveloperModeEnabled') ?? true;
+    _baseURL = await _prefsService.getString('baseURL') ??
+        'http://127.0.0.1:8000/ap/v1';
+    _restApiUtility.updateBaseURL(_baseURL);
+    _continuousModeSteps =
+        await _prefsService.getInt('continuousModeSteps') ?? 10;
+    notifyListeners();
+  }
+
+  /// Toggles the state of Dark Mode and notifies listeners.
+  Future<void> toggleDarkMode(bool value) async {
+    _isDarkModeEnabled = value;
+    notifyListeners();
+    await _prefsService.setBool('isDarkModeEnabled', value);
+  }
+
+  /// Toggles the state of Developer Mode and notifies listeners.
+  Future<void> toggleDeveloperMode(bool value) async {
+    _isDeveloperModeEnabled = value;
+    notifyListeners();
+    await _prefsService.setBool('isDeveloperModeEnabled', value);
+  }
+
+  /// Updates the state of Base URL, notifies listeners, and updates the RestApiUtility baseURL.
+  Future<void> updateBaseURL(String value) async {
+    _baseURL = value;
+    notifyListeners();
+    await _prefsService.setString('baseURL', value);
+    _restApiUtility.updateBaseURL(value);
+  }
+
+  /// Increments the number of Continuous Mode Steps and notifies listeners.
+  Future<void> incrementContinuousModeSteps() async {
+    _continuousModeSteps += 1;
+    notifyListeners();
+    await _prefsService.setInt('continuousModeSteps', _continuousModeSteps);
+  }
+
+  /// Decrements the number of Continuous Mode Steps and notifies listeners.
+  Future<void> decrementContinuousModeSteps() async {
+    if (_continuousModeSteps > 1) {
+      // Ensure that the number of steps is at least 1
+      _continuousModeSteps -= 1;
+      notifyListeners();
+      await _prefsService.setInt('continuousModeSteps', _continuousModeSteps);
+    }
+  }
+
+  // Method to sign out
+  Future<void> signOut() async {
+    await _authService.signOut();
+  }
+}