1  import 'package:flutter_riverpod/flutter_riverpod.dart';
 2  import 'package:shared_preferences/shared_preferences.dart';
 3  
 4  const _enabledKey = 'notification_settings_enabled';
 5  const _soundKey = 'notification_settings_sound';
 6  
 7  class NotificationSettings {
 8    final bool enabled;
 9    final bool soundEnabled;
10  
11    const NotificationSettings({
12      this.enabled = true,
13      this.soundEnabled = true,
14    });
15  
16    NotificationSettings copyWith({bool? enabled, bool? soundEnabled}) {
17      return NotificationSettings(
18        enabled: enabled ?? this.enabled,
19        soundEnabled: soundEnabled ?? this.soundEnabled,
20      );
21    }
22  }
23  
24  final notificationSettingsProvider =
25      StateNotifierProvider<NotificationSettingsNotifier, NotificationSettings>(
26          (ref) {
27    return NotificationSettingsNotifier();
28  });
29  
30  class NotificationSettingsNotifier extends StateNotifier<NotificationSettings> {
31    NotificationSettingsNotifier() : super(const NotificationSettings()) {
32      _load();
33    }
34  
35    Future<void> _load() async {
36      final prefs = await SharedPreferences.getInstance();
37      state = NotificationSettings(
38        enabled: prefs.getBool(_enabledKey) ?? true,
39        soundEnabled: prefs.getBool(_soundKey) ?? true,
40      );
41    }
42  
43    Future<void> setEnabled(bool enabled) async {
44      state = state.copyWith(enabled: enabled);
45      final prefs = await SharedPreferences.getInstance();
46      await prefs.setBool(_enabledKey, enabled);
47    }
48  
49    Future<void> setSoundEnabled(bool soundEnabled) async {
50      state = state.copyWith(soundEnabled: soundEnabled);
51      final prefs = await SharedPreferences.getInstance();
52      await prefs.setBool(_soundKey, soundEnabled);
53    }
54  }