import 'dart:convert'; import 'dart:io'; import 'dart:typed_data'; import 'package:matrix/matrix.dart'; import 'package:flutter/foundation.dart'; import 'package:flutter/services.dart'; import 'package:flutter_secure_storage/flutter_secure_storage.dart'; import 'package:hive/hive.dart'; import 'package:hive_flutter/hive_flutter.dart'; import 'package:path_provider/path_provider.dart'; import '../platform_infos.dart'; class FlutterMatrixHiveStore extends FamedlySdkHiveDatabase { FlutterMatrixHiveStore(String name, {HiveCipher encryptionCipher}) : super( name, encryptionCipher: encryptionCipher, ); Box _customBox; String get _customBoxName => '$name.box.custom'; static bool _hiveInitialized = false; static const String _hiveCipherStorageKey = 'hive_encryption_key'; @override Future open() async { await super.open(); _customBox = await Hive.openBox( _customBoxName, encryptionCipher: encryptionCipher, ); return; } @override Future clear() async { await super.clear(); await _customBox.deleteAll(_customBox.keys); await _customBox.close(); } dynamic get(dynamic key) => _customBox.get(key); Future put(dynamic key, dynamic value) => _customBox.put(key, value); static Future hiveDatabaseBuilder( Client client) async { if (!kIsWeb && !_hiveInitialized) { _hiveInitialized = true; } HiveCipher hiverCipher; try { // Workaround for secure storage is calling Platform.operatingSystem on web if (kIsWeb) throw MissingPluginException(); const secureStorage = FlutterSecureStorage(); final containsEncryptionKey = await secureStorage.containsKey(key: _hiveCipherStorageKey); if (!containsEncryptionKey) { final key = Hive.generateSecureKey(); await secureStorage.write( key: _hiveCipherStorageKey, value: base64UrlEncode(key), ); } // workaround for if we just wrote to the key and it still doesn't exist final rawEncryptionKey = await secureStorage.read(key: _hiveCipherStorageKey); if (rawEncryptionKey == null) throw MissingPluginException(); final encryptionKey = base64Url.decode(rawEncryptionKey); hiverCipher = HiveAesCipher(encryptionKey); } on MissingPluginException catch (_) { Logs().i('Hive encryption is not supported on this platform'); } final db = FlutterMatrixHiveStore( client.clientName, encryptionCipher: hiverCipher, ); try { await db.open(); } catch (e, s) { Logs().e('Unable to open Hive. Delete and try again...', e, s); await db.clear(); await db.open(); } return db; } @override int get maxFileSize => supportsFileStoring ? 100 * 1024 * 1024 : 0; @override bool get supportsFileStoring => (PlatformInfos.isIOS || PlatformInfos.isAndroid || PlatformInfos.isDesktop); Future _getFileStoreDirectory() async { try { try { return (await getApplicationSupportDirectory()).path; } catch (_) { return (await getApplicationDocumentsDirectory()).path; } } catch (_) { return (await getDownloadsDirectory()).path; } } @override Future getFile(Uri mxcUri) async { if (!supportsFileStoring) return null; final tempDirectory = await _getFileStoreDirectory(); final file = File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}'); if (await file.exists() == false) return null; final bytes = await file.readAsBytes(); return bytes; } @override Future storeFile(Uri mxcUri, Uint8List bytes, int time) async { if (!supportsFileStoring) return null; final tempDirectory = await _getFileStoreDirectory(); final file = File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}'); if (await file.exists()) return; await file.writeAsBytes(bytes); return; } }