109 lines
2.7 KiB
Dart
109 lines
2.7 KiB
Dart
import 'dart:async';
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import 'dart:core';
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import 'package:flutter_secure_storage/flutter_secure_storage.dart';
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import 'package:localstorage/localstorage.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:fluffychat/utils/platform_infos.dart';
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// see https://github.com/mogol/flutter_secure_storage/issues/161#issuecomment-704578453
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class AsyncMutex {
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Completer<void> _completer;
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Future<void> lock() async {
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while (_completer != null) {
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await _completer.future;
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}
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_completer = Completer<void>();
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}
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void unlock() {
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assert(_completer != null);
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final completer = _completer;
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_completer = null;
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completer.complete();
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}
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}
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class Store {
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LocalStorage storage;
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final FlutterSecureStorage secureStorage;
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static final _mutex = AsyncMutex();
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Store()
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: secureStorage =
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PlatformInfos.isMobile ? const FlutterSecureStorage() : null;
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Future<void> _setupLocalStorage() async {
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if (storage == null) {
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final directory = PlatformInfos.isBetaDesktop
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? await getApplicationSupportDirectory()
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: (PlatformInfos.isWeb
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? null
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: await getApplicationDocumentsDirectory());
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storage = LocalStorage('LocalStorage', directory?.path);
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await storage.ready;
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}
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}
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Future<String> getItem(String key) async {
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if (!PlatformInfos.isMobile) {
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await _setupLocalStorage();
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try {
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return storage.getItem(key)?.toString();
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} catch (_) {
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return null;
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}
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}
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try {
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await _mutex.lock();
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return await secureStorage.read(key: key);
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} catch (_) {
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return null;
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} finally {
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_mutex.unlock();
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}
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}
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Future<bool> getItemBool(String key, [bool defaultValue]) async {
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final value = await getItem(key);
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if (value == null) {
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return defaultValue ?? false;
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}
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// we also check for '1' for legacy reasons, some booleans were stored that way
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return value == '1' || value.toLowerCase() == 'true';
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}
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Future<void> setItem(String key, String value) async {
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if (!PlatformInfos.isMobile) {
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await _setupLocalStorage();
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return await storage.setItem(key, value);
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}
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try {
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await _mutex.lock();
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return await secureStorage.write(key: key, value: value);
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} finally {
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_mutex.unlock();
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}
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}
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Future<void> setItemBool(String key, bool value) async {
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await setItem(key, value.toString());
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}
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Future<void> deleteItem(String key) async {
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if (!PlatformInfos.isMobile) {
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await _setupLocalStorage();
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return await storage.deleteItem(key);
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}
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try {
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await _mutex.lock();
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return await secureStorage.delete(key: key);
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} finally {
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_mutex.unlock();
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}
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}
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}
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