LehrerApp/LehrerApp.Desktop/Views/Groups/LessonDialog.axaml.cs

using Avalonia.Controls;
using Avalonia.Interactivity;
using LehrerApp.Core.Interfaces;
using LehrerApp.Core.Models;
using LehrerApp.Desktop.ViewModels.Groups;
using Microsoft.Extensions.DependencyInjection;

namespace LehrerApp.Desktop.Views.Groups;

public partial class LessonDialog : Window
{
    public LessonDialog() => InitializeComponent();

    protected override void OnDataContextChanged(EventArgs e)
    {
        base.OnDataContextChanged(e);
        if (DataContext is LessonDialogViewModel vm)
            vm.OnPickAlternativePath = ShowAlternativePathDialog;
    }

    private async Task<AlternativeLessonPath?> ShowAlternativePathDialog(Guid? currentId)
    {
        var dialogVm = new AlternativePathDialogViewModel(
            App.Services.GetRequiredService<IAlternativeLessonPathRepository>(), currentId);
        var dialog = new AlternativePathDialog { DataContext = dialogVm };

        var ok = await dialog.ShowDialog<bool>(this);
        return ok ? dialogVm.Result : null;
    }

    private void OnSave(object? s, RoutedEventArgs e)
    {
        if (DataContext is LessonDialogViewModel vm && vm.SaveCommand.CanExecute(null))
        {
            vm.SaveCommand.Execute(null);
            if (vm.Result is not null) Close(true);
        }
    }

    private void OnCancel(object? s, RoutedEventArgs e) => Close(false);
}