55 lines
1.6 KiB
Dart
55 lines
1.6 KiB
Dart
import 'package:hiddify/data/data_providers.dart';
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import 'package:hooks_riverpod/hooks_riverpod.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class PrefNotifier<T> extends AutoDisposeNotifier<T> {
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PrefNotifier(this._key, this._defaultValue, this._mapFrom, this._mapTo);
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final String _key;
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final T _defaultValue;
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final T Function(String)? _mapFrom;
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final String Function(T)? _mapTo;
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static AutoDisposeNotifierProvider<PrefNotifier<T>, T> provider<T>(
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String key,
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T defaultValue, {
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T Function(String value)? mapFrom,
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String Function(T value)? mapTo,
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}) =>
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NotifierProvider.autoDispose(
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() => PrefNotifier(key, defaultValue, mapFrom, mapTo),
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);
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SharedPreferences get _prefs => ref.read(sharedPreferencesProvider);
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/// Updates the value asynchronously.
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Future<void> update(T value) async {
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if (_mapTo != null && _mapFrom != null) {
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await _prefs.setString(_key, _mapTo!(value));
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} else {
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switch (value) {
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case String _:
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await _prefs.setString(_key, value);
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case bool _:
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await _prefs.setBool(_key, value);
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case int _:
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await _prefs.setInt(_key, value);
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case double _:
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await _prefs.setDouble(_key, value);
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case List<String> _:
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await _prefs.setStringList(_key, value);
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}
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}
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super.state = value;
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}
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@override
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T build() {
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if (_mapTo != null && _mapFrom != null) {
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final persisted = _prefs.getString(_key);
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return persisted != null ? _mapFrom!(persisted) : _defaultValue;
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}
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return _prefs.get(_key) as T? ?? _defaultValue;
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}
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}
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