fluffychat/lib/utils/famedlysdk_store.dart
2021-02-03 16:30:23 +01:00

141 lines
3.6 KiB
Dart

import 'package:famedlysdk/famedlysdk.dart';
import 'package:fluffychat/utils/platform_infos.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:localstorage/localstorage.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:async';
import 'dart:core';
import './database/shared.dart';
import '../config/setting_keys.dart';
import 'package:random_string/random_string.dart';
Future<Database> getDatabase(Client client) async {
while (_generateDatabaseLock) {
await Future.delayed(Duration(milliseconds: 50));
}
_generateDatabaseLock = true;
try {
if (_db != null) return _db;
final store = Store();
var password = await store.getItem(SettingKeys.databasePassword);
var newPassword = false;
if (password == null || password.isEmpty) {
newPassword = true;
password = randomString(255);
}
_db = await constructDb(
logStatements: false,
filename: 'moor.sqlite',
password: password,
);
if (newPassword) {
await store.setItem(SettingKeys.databasePassword, password);
}
return _db;
} finally {
_generateDatabaseLock = false;
}
}
Database _db;
bool _generateDatabaseLock = false;
// 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 ? 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 await 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();
}
}
}