Line data    Source code

       1             : // Copyright 2023 The terCAD team. All rights reserved.
       2             : // Use of this source code is governed by a CC BY-NC-ND 4.0 license that can be found in the LICENSE file.
       3             : 
       4             : import 'dart:convert';
       5             : import 'dart:async';
       6             : import 'package:app_finance/_classes/controller/encryption_handler.dart';
       7             : import 'package:app_finance/_classes/storage/app_data.dart';
       8             : import 'package:app_finance/_classes/storage/transaction_log/abstract_storage_web.dart'
       9             :     if (dart.library.io) 'package:app_finance/_classes/storage/transaction_log/abstract_storage.dart';
      10             : import 'package:app_finance/_classes/storage/transaction_log/interface_storage.dart';
      11             : import 'package:app_finance/_ext/data_ext.dart';
      12             : 
      13             : class TransactionLog extends AbstractStorage implements InterfaceStorage {
      14             :   static int amount = 0;
      15             : 
      16           0 :   static Future<String> getSize() => AbstractStorage.getSize();
      17             : 
      18           0 :   static void clear() => AbstractStorage.clear();
      19             : 
      20           6 :   static Stream<String> read() => AbstractStorage.read();
      21             : 
      22           0 :   static void saveRaw(String line) => AbstractStorage.saveRaw(line);
      23             : 
      24           0 :   static void save(dynamic content) {
      25           0 :     String line = content.toString();
      26           0 :     if (EncryptionHandler.doEncrypt()) {
      27           0 :       line = EncryptionHandler.encrypt(line);
      28             :     }
      29           0 :     saveRaw(line);
      30           0 :     amount++;
      31             :   }
      32             : 
      33           0 :   static void init(AppData store, String type, Map<String, dynamic> data) {
      34           0 :     final obj = type.toDataObject(data, store);
      35             :     if (obj != null) {
      36           0 :       store.update(obj.uuid ?? '', obj, true);
      37             :     }
      38             :   }
      39             : 
      40           3 :   static Future<bool> load(AppData store) async {
      41           3 :     bool isEncrypted = EncryptionHandler.doEncrypt();
      42             :     bool isOK = true;
      43             :     amount = 0;
      44           6 :     await for (var line in read()) {
      45           0 :       isOK &= add(store, line, isEncrypted);
      46           0 :       amount++;
      47             :     }
      48             :     return isOK;
      49             :   }
      50             : 
      51           0 :   static bool add(AppData store, String line, bool isEncrypted, [bool onlyNew = false]) {
      52             :     bool isOK = true;
      53           0 :     if (line == '') {
      54             :       return isOK;
      55             :     }
      56             :     try {
      57             :       if (isEncrypted) {
      58           0 :         line = EncryptionHandler.decrypt(line);
      59             :       }
      60           0 :       var obj = json.decode(line);
      61             :       // FIXME: hash is not always the same for Web
      62             :       if ( // EncryptionHandler.getHash(obj['data']) == obj['type']['hash'] &&
      63           0 :           (!onlyNew || store.getByUuid(obj['data']['uuid']) == null)) {
      64           0 :         init(store, obj['type']['name'], obj['data']);
      65             :       } else {
      66             :         // Corrupted data... skip
      67             :       }
      68             :       // ignore: unused_catch_stack
      69             :     } catch (e, stackTrace) {
      70             :       // print([e, stackTrace]);
      71             :       isOK = false;
      72             :     }
      73             :     return isOK;
      74             :   }
      75             : }