creek

 1import 'package:flutter/material.dart';
 2import 'package:shared_preferences/shared_preferences.dart';
 3
 4// Global instance for easy access
 5final themeService = ThemeService();
 6
 7class ThemeService with ChangeNotifier {
 8  ThemeMode _mode = ThemeMode.system;
 9  ThemeMode get mode => _mode;
10
11  Future<void> loadTheme() async {
12    final prefs = await SharedPreferences.getInstance();
13    final String? saved = prefs.getString('theme_mode');
14
15    if (saved == 'light') {
16      _mode = ThemeMode.light;
17    } else if (saved == 'dark') {
18      _mode = ThemeMode.dark;
19    } else {
20      _mode = ThemeMode.system;
21    }
22
23    notifyListeners();
24  }
25
26  Future<void> toggleTheme() async {
27    final prefs = await SharedPreferences.getInstance();
28
29    if (_mode == ThemeMode.dark) {
30      _mode = ThemeMode.light;
31      await prefs.setString('theme_mode', 'light');
32    } else {
33      _mode = ThemeMode.dark;
34      await prefs.setString('theme_mode', 'dark');
35    }
36
37    notifyListeners();
38  }
39}