Adding point works

ViewModels/NewPointDialogViewModel.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform.Storage;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using CommunityToolkit.Mvvm.Messaging;
+using GazpromApp.Messages;
+using Image = GazpromApp.Models.Image;
+using Point = GazpromApp.Models.Point;
+
+namespace GazpromApp.ViewModels;
+
+public partial class NewPointDialogViewModel : ViewModelBase
+{
+    [ObservableProperty] 
+    private string? _name;
+    
+    [ObservableProperty]
+    private string? _description;
+    
+    public ObservableCollection<ImageViewModel> Images { get; } = new ObservableCollection<ImageViewModel>();
+
+    [RelayCommand]
+    public void DeleteImage(ImageViewModel image)
+    {
+        Images.Remove(image);
+        if (Images.Count == 0)
+            IsImagesEmpty = true;
+    }
+
+    [RelayCommand]
+    private async Task AddImage(Window w)
+    {
+        IReadOnlyList<IStorageFile> files = await w.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions()
+        {
+            AllowMultiple = true,
+            Title = "Выберите одну или несколько картинок",
+            FileTypeFilter = [FilePickerFileTypes.ImageAll],
+        });
+        foreach (var file in files)
+            Images.Add(new ImageViewModel(new Image()) { FileName = new Bitmap(file.Path.AbsolutePath) });
+        IsImagesEmpty = false;
+    }
+    
+    [ObservableProperty]
+    private bool _isImagesEmpty = true;
+    
+    private bool CanExecuteEnterPoint() => !string.IsNullOrEmpty(Name) || !string.IsNullOrEmpty(Description);
+    
+    [RelayCommand(CanExecute = nameof(CanExecuteEnterPoint))]
+    public void EnterPoint()
+    {
+        Point point = new Point()
+        {
+            Name = Name,
+            Description = Description,
+            Images = Images.Select(e => e.GetImage()).ToList()
+        };
+        WeakReferenceMessenger.Default.Send(new NewPointDone(new PointViewModel(point)));
+    }
+}