fluffychat/lib/utils/famedlysdk_store.dart
2022-01-31 16:33:42 +01:00

109 lines
2.7 KiB
Dart

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