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            0 :   static Stream<String> read() => AbstractStorage.read();
      21              : 
      22            0 :   static void saveRaw(String line) => AbstractStorage.saveRaw(line);
      23              : 
      24            0 :   static void rewrite(List<String> lines) {
      25            0 :     clear();
      26            0 :     for (final line in lines) {
      27            0 :       saveRaw(line);
      28              :     }
      29            0 :     amount = lines.length;
      30              :   }
      31              : 
      32            0 :   static void save(dynamic content) {
      33            0 :     String line = content.toString();
      34            0 :     if (EncryptionHandler.doEncrypt()) {
      35            0 :       line = EncryptionHandler.encrypt(line);
      36              :     }
      37            0 :     saveRaw(line);
      38            0 :     amount++;
      39              :   }
      40              : 
      41            0 :   static void init(AppData store, String type, Map<String, dynamic> data) {
      42            0 :     final obj = type.toDataObject(data, store);
      43              :     if (obj != null) {
      44            0 :       store.update(obj.uuid ?? '', obj, true);
      45              :     }
      46              :   }
      47              : 
      48            0 :   static Future<bool> load(AppData store) async {
      49            0 :     bool isEncrypted = EncryptionHandler.doEncrypt();
      50              :     bool isOK = true;
      51              :     amount = 0;
      52            0 :     await for (var line in read()) {
      53            0 :       isOK &= add(store, line, isEncrypted);
      54            0 :       amount++;
      55              :     }
      56              :     return isOK;
      57              :   }
      58              : 
      59            0 :   static bool add(AppData store, String line, bool isEncrypted, [bool onlyNew = false]) {
      60              :     bool isOK = true;
      61            0 :     if (line == '') {
      62              :       return isOK;
      63              :     }
      64              :     try {
      65              :       if (isEncrypted) {
      66            0 :         line = EncryptionHandler.decrypt(line);
      67              :       }
      68            0 :       var obj = json.decode(line);
      69              :       // FIXME: hash is not always the same for Web
      70              :       if ( // EncryptionHandler.getHash(obj['data']) == obj['type']['hash'] &&
      71            0 :           (!onlyNew || store.getByUuid(obj['data']['uuid']) == null)) {
      72            0 :         init(store, obj['type']['name'], obj['data']);
      73              :       } else {
      74              :         // Corrupted data... skip
      75              :       }
      76              :       // ignore: unused_catch_stack
      77              :     } catch (e, stackTrace) {
      78              :       // print([e, stackTrace]);
      79              :       isOK = false;
      80              :     }
      81              :     return isOK;
      82              :   }
      83              : }