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/math/abstract_recalculation.dart';
       5              : import 'package:app_finance/_classes/storage/history_data.dart';
       6              : import 'package:app_finance/_classes/structure/account_app_data.dart';
       7              : import 'package:app_finance/_classes/structure/bill_app_data.dart';
       8              : import 'package:app_finance/_classes/structure/budget_app_data.dart';
       9              : 
      10              : class BillRecalculation extends AbstractRecalculation {
      11              :   BillAppData change;
      12              :   BillAppData? initial;
      13              : 
      14            2 :   BillRecalculation({
      15              :     required this.change,
      16              :     this.initial,
      17              :   });
      18              : 
      19            0 :   @override
      20            0 :   double getDelta() => throw UnimplementedError();
      21              : 
      22            0 :   double getPrevDelta() => initial?.hidden == true ? 0.0 : initial?.details;
      23              : 
      24            2 :   double getStateDelta(dynamic prev, dynamic curr, [bool isBudget = true]) {
      25            2 :     double initialDetails = initial?.details ?? 0.0;
      26            8 :     double delta = change.hidden ? 0.0 : change.details;
      27              :     if (isBudget) {
      28            4 :       initialDetails *= initial?.exchangeCategory ?? 1.0;
      29            6 :       delta *= change.exchangeCategory;
      30              :     } else {
      31            4 :       initialDetails *= initial?.exchangeAccount ?? 1.0;
      32            6 :       delta *= change.exchangeAccount;
      33              :     }
      34            2 :     if (initial != null && prev?.uuid == curr?.uuid) {
      35            0 :       delta = initial?.hidden == true ? delta : delta - initialDetails;
      36              :     }
      37              :     return delta;
      38              :   }
      39              : 
      40            2 :   BillRecalculation updateAccount(AccountAppData accountChange, AccountAppData? accountInitial) {
      41              :     double? diffDelta;
      42            0 :     if (accountInitial != null && initial != null && accountChange.uuid != accountInitial.uuid) {
      43            0 :       diffDelta = getPrevDelta();
      44            0 :       HistoryData.addLog(accountInitial.uuid!, initial, 0.0, diffDelta, initial!.uuid);
      45              :     }
      46            2 :     double delta = getStateDelta(accountInitial, accountChange, false);
      47           12 :     HistoryData.addLog(accountChange.uuid!, change, 0.0, -delta, change.uuid);
      48            0 :     if (diffDelta != null && accountInitial?.createdAt.isBefore(initial?.createdAt ?? DateTime.now()) == true) {
      49            0 :       accountInitial!.details += exchange.reform(diffDelta, initial?.currency, accountInitial.currency);
      50              :     }
      51            8 :     if (accountChange.createdAt.isBefore(change.createdAt)) {
      52            0 :       accountChange.details -= delta;
      53              :     }
      54              :     return this;
      55              :   }
      56              : 
      57            2 :   BillRecalculation updateBudget(BudgetAppData budgetChange, BudgetAppData? budgetInitial) {
      58              :     if (budgetInitial != null &&
      59            0 :         budgetChange.uuid != budgetInitial.uuid &&
      60            0 :         !budgetInitial.getDateBoundary().isAfter(change.createdAt)) {
      61            0 :       double prevDelta = exchange.reform(getPrevDelta(), initial?.currency, budgetInitial.currency);
      62            0 :       budgetInitial.progress = getProgress(budgetInitial.amountLimit, budgetInitial.progress, -prevDelta);
      63            0 :       budgetInitial.amount -= prevDelta;
      64              :     }
      65            8 :     if (!budgetChange.getDateBoundary().isAfter(change.createdAt)) {
      66            2 :       double delta = getStateDelta(budgetInitial, budgetChange, true);
      67            8 :       budgetChange.progress = getProgress(budgetChange.amountLimit, budgetChange.progress, delta);
      68            4 :       budgetChange.amount += delta;
      69              :     }
      70              :     return this;
      71              :   }
      72              : }