mirror of
https://gitlab.com/famedly/fluffychat.git
synced 2024-10-03 18:08:45 +02:00
140 lines
4.1 KiB
Dart
140 lines
4.1 KiB
Dart
//@dart=2.12
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import 'dart:convert';
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/foundation.dart' hide Key;
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import 'package:flutter/services.dart';
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import 'package:flutter_secure_storage/flutter_secure_storage.dart';
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import 'package:hive_flutter/hive_flutter.dart';
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import 'package:matrix/matrix.dart';
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import 'package:path_provider/path_provider.dart';
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import '../client_manager.dart';
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import '../famedlysdk_store.dart';
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class FlutterFluffyBoxDatabase extends FluffyBoxDatabase {
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FlutterFluffyBoxDatabase(
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String name,
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String path, {
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HiveCipher? key,
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}) : super(
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name,
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path,
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key: key,
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);
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static const String _cipherStorageKey = 'database_encryption_key';
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static Future<FluffyBoxDatabase> databaseBuilder(Client client) async {
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Logs().d('Open FluffyBox...');
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HiveAesCipher? hiverCipher;
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try {
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// Workaround for secure storage is calling Platform.operatingSystem on web
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if (kIsWeb) throw MissingPluginException();
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const secureStorage = FlutterSecureStorage();
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final containsEncryptionKey =
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await secureStorage.containsKey(key: _cipherStorageKey);
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if (!containsEncryptionKey) {
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final key = Hive.generateSecureKey();
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await secureStorage.write(
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key: _cipherStorageKey,
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value: base64UrlEncode(key),
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);
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}
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// workaround for if we just wrote to the key and it still doesn't exist
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final rawEncryptionKey = await secureStorage.read(key: _cipherStorageKey);
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if (rawEncryptionKey == null) throw MissingPluginException();
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hiverCipher = HiveAesCipher(base64Url.decode(rawEncryptionKey));
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} on MissingPluginException catch (_) {
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Logs().i('FluffyBox encryption is not supported on this platform');
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} catch (_) {
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const FlutterSecureStorage().delete(key: _cipherStorageKey);
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rethrow;
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}
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final db = FluffyBoxDatabase(
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'fluffybox_${client.clientName.replaceAll(' ', '_').toLowerCase()}',
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await _findDatabasePath(client),
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key: hiverCipher,
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);
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try {
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await db.open();
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} catch (_) {
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Logs().w('Unable to open FluffyBox. Delete database and storage key...');
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await Store().deleteItem(ClientManager.clientNamespace);
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const FlutterSecureStorage().delete(key: _cipherStorageKey);
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await db.clear();
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rethrow;
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}
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Logs().d('FluffyBox is ready');
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return db;
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}
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static Future<String> _findDatabasePath(Client client) async {
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String path = client.clientName;
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if (!kIsWeb) {
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Directory directory;
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try {
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if (Platform.isLinux) {
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directory = await getApplicationSupportDirectory();
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} else {
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directory = await getApplicationDocumentsDirectory();
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}
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} catch (_) {
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try {
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directory = await getLibraryDirectory();
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} catch (_) {
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directory = Directory.current;
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}
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}
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path = directory.path;
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}
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return path;
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}
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@override
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int get maxFileSize => supportsFileStoring ? 100 * 1024 * 1024 : 0;
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@override
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bool get supportsFileStoring => !kIsWeb;
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Future<String> _getFileStoreDirectory() async {
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try {
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try {
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return (await getApplicationSupportDirectory()).path;
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} catch (_) {
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return (await getApplicationDocumentsDirectory()).path;
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}
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} catch (_) {
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return (await getDownloadsDirectory())!.path;
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}
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}
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@override
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Future<Uint8List?> getFile(Uri mxcUri) async {
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if (!supportsFileStoring) return null;
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final tempDirectory = await _getFileStoreDirectory();
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final file =
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File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}');
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if (await file.exists() == false) return null;
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final bytes = await file.readAsBytes();
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return bytes;
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}
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@override
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Future storeFile(Uri mxcUri, Uint8List bytes, int time) async {
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if (!supportsFileStoring) return null;
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final tempDirectory = await _getFileStoreDirectory();
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final file =
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File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}');
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if (await file.exists()) return;
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await file.writeAsBytes(bytes);
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return;
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}
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}
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