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 'package:app_finance/_classes/structure/currency_app_data.dart';
       5              : import 'package:app_finance/_classes/storage/app_preferences.dart';
       6              : import 'package:app_finance/_classes/storage/app_data.dart';
       7              : import 'package:flutter_currency_picker/flutter_currency_picker.dart';
       8              : 
       9              : class Exchange {
      10              :   AppData store;
      11              :   static Currency? defaultCurrency;
      12              : 
      13            3 :   Exchange({
      14              :     required this.store,
      15              :   });
      16              : 
      17            1 :   Currency? getDefaultCurrency() {
      18            2 :     defaultCurrency ??= CurrencyProvider.find(AppPreferences.get(AppPreferences.prefCurrency));
      19            1 :     defaultCurrency ??= CurrencyProvider.find('EUR');
      20              :     CurrencyDefaults.defaultCurrency = defaultCurrency;
      21              :     return defaultCurrency;
      22              :   }
      23              : 
      24            3 :   double reform(double? amount, Currency? origin, Currency? target) {
      25              :     amount ??= 0.0;
      26            1 :     if (origin != null && target != null && origin.code != target.code) {
      27            3 :       CurrencyAppData? ex = store.getByUuid('${origin.code}-${target.code}');
      28              :       if (ex == null) {
      29            1 :         ex = CurrencyAppData(
      30              :           currency: target,
      31              :           currencyFrom: origin,
      32              :         );
      33            2 :         store.add(ex);
      34              :       }
      35            2 :       amount *= ex.details;
      36              :     }
      37              :     return amount;
      38              :   }
      39              : }