66 lines
1.7 KiB
Dart
66 lines
1.7 KiB
Dart
import 'package:flutter/foundation.dart';
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import '../models/settings.dart';
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import '../services/settings_service.dart';
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class SettingsViewModel extends ChangeNotifier {
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final SettingsService settingsService;
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SettingsViewModel({required this.settingsService});
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AppSettings _settings = AppSettings.defaults;
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bool _isLoading = false;
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bool _hasLoaded = false;
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String? _errorMessage;
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AppSettings get settings => _settings;
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bool get isLoading => _isLoading;
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bool get hasLoaded => _hasLoaded;
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String? get errorMessage => _errorMessage;
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Future<void> ensureLoaded() async {
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if (_hasLoaded || _isLoading) return;
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await load();
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}
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Future<void> load() async {
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if (_isLoading) return;
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_isLoading = true;
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_errorMessage = null;
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notifyListeners();
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try {
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_settings = await settingsService.getSettings();
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} catch (_) {
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_errorMessage = 'Could not load settings.';
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} finally {
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_hasLoaded = true;
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_isLoading = false;
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notifyListeners();
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}
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}
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/// Just flips the preference flag. Caller is responsible for having
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/// already set/verified the actual PIN via PinLockViewModel first.
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Future<void> updatePinRequired(bool value) =>
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_save(_settings.copyWith(pinRequired: value));
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Future<void> updateThemeMode(AppThemeMode mode) =>
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_save(_settings.copyWith(themeMode: mode));
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Future<void> _save(AppSettings updated) async {
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final previous = _settings;
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_settings = updated;
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_errorMessage = null;
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notifyListeners();
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try {
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await settingsService.saveSettings(updated);
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} catch (_) {
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_settings = previous;
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_errorMessage = 'Could not save settings.';
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notifyListeners();
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}
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}
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} |