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           1 :   Exchange({
      14             :     required this.store,
      15             :   });
      16             : 
      17           1 :   Currency? getDefaultCurrency() {
      18           2 :     defaultCurrency ??= CurrencyProvider.find(AppPreferences.get(AppPreferences.prefCurrency));
      19           0 :     defaultCurrency ??= CurrencyProvider.find('EUR');
      20             :     CurrencyDefaults.defaultCurrency = defaultCurrency;
      21             :     return defaultCurrency;
      22             :   }
      23             : 
      24           1 :   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             : }