72 lines
3.0 KiB
C#
72 lines
3.0 KiB
C#
using System;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Reactive;
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using System.Reactive.Linq;
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using PcgsInvUi.Models;
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using PcgsInvUi.Services;
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using ReactiveUI;
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namespace PcgsInvUi.ViewModels;
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public class MainWindowViewModel : ViewModelBase
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{
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public ViewModelBase SidebarContent
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{
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get => _sideContent;
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private set => this.RaiseAndSetIfChanged(ref _sideContent, value);
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}
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public ObservableCollection<Coin> CoinCollection { get; set; }
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public Coin? SelectedCoin
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{
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get => _selectedCoin;
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set => this.RaiseAndSetIfChanged(ref _selectedCoin, value);
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}
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public double TotalValue
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{
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get => _totalValue;
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set => this.RaiseAndSetIfChanged(ref _totalValue, value);
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}
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public ReactiveCommand<Unit, Unit> DeleteCommand { get; }
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public Interaction<DeleteWindowViewModel, Boolean> ShowDeleteWindow { get; }
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private ViewModelBase _sideContent;
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private Coin? _selectedCoin;
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private double _totalValue;
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private PcgsClient _pcgsClient;
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public MainWindowViewModel(CoinCollection coins)
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{
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var newViewModel = new NewViewModel();
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_sideContent = newViewModel;
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CoinCollection = new ObservableCollection<Coin>(coins.GetItems());
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_pcgsClient = new PcgsClient("eAb8gS0I2XAvT_5gJeiGJaglMia1Tk-oB4kJUK6kuafyrny_S61vIJY-Ikl4nCQM67wrdxzUqLVWTV2kBSxD3d5XNBHxHnYBhcSS6dOPug0hZaF3qAv56df3gYSzOGh9Tif5y0eP3Iw0LrqKDr1Hj-dk6SV6GKog2IIqCPQhhHH8FMTWBTYO-_O8cx7qLdM5GM8KlTsic6g3VRUhM8EA_4OO04dCfmNLGhqINRl3jGZ0Q4ziI8fng2bVWsIyteqiPzUn10rIQ3-OPpqVZG_DxeOmOejj4GzbUNyqUOajy-nr5rYY");
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ShowDeleteWindow = new Interaction<DeleteWindowViewModel, bool>();
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var deleteEnabled = this.WhenAnyValue(x => x.SelectedCoin)
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.Select(x => x != null);
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DeleteCommand = ReactiveCommand.CreateFromTask(async () =>
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{
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var deleteViewModel = new DeleteWindowViewModel();
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var result = await ShowDeleteWindow.Handle(deleteViewModel);
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if (result) CoinCollection.Remove(SelectedCoin); // possible null deref - ignored due to button being disabled.
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}, deleteEnabled);
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// Subscribe to SidebarContent.OkCommand, which is an IObservable<(int, string, int)>
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// This is the same as the above, but with a different syntax.
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newViewModel.OkCommand
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.Subscribe(async requestStructure =>
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{
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var newCoin = await _pcgsClient.GetCoinFactsByGrade(requestStructure.Item1, requestStructure.Item2);
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newCoin.Quantity = requestStructure.Item3;
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CoinCollection.Add(newCoin);
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TotalValue += newCoin.Quantity * newCoin.PriceGuideValue;
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});
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// Change TotalValue anytime SelectedCoin.TotalPrice changes.
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// Possible null deref - ignored due to null values summing to 0.
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this.WhenAnyValue(x => x.SelectedCoin.TotalPrice)
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.Subscribe(_ => TotalValue = CoinCollection.Sum(x => x.TotalPrice) );
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}
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}
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