rewrite into avalonia for linux support

NetworkDiagram/Models/DiagramModels.cs

@@ -1,6 +1,14 @@
+using System.Collections.Generic;
 using System.ComponentModel;
+using System.Globalization;
+using System.IO;
+using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Text.Json.Serialization;
+using Avalonia;
+using Avalonia.Data.Converters;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
 
 namespace NetworkDiagram.Models
 {
@@ -18,59 +26,63 @@ namespace NetworkDiagram.Models
 
     public class PlacedDevice : INotifyPropertyChanged
     {
+        private string _name = string.Empty;
         public string Name
         {
-            get;
+            get => _name;
             set
             {
-                field = value;
+                _name = value;
                 OnPropertyChanged();
             }
-        } = string.Empty;
+        }
 
         public string TemplateName { get; set; } = string.Empty;
 
         [JsonIgnore]
         public string IconPath { get; set; } = string.Empty;
 
+        private double _x;
         public double X
         {
-            get;
+            get => _x;
             set
             {
-                field = value;
+                _x = value;
                 OnPropertyChanged();
                 OnPropertyChanged(nameof(CenterX));
             }
         }
 
+        private double _y;
         public double Y
         {
-            get;
+            get => _y;
             set
             {
-                field = value;
+                _y = value;
                 OnPropertyChanged();
                 OnPropertyChanged(nameof(CenterY));
             }
         }
 
+        private List<string> _ipAddresses = [];
         public List<string> IpAddresses
         {
-            get;
+            get => _ipAddresses;
             set
             {
-                field = value;
+                _ipAddresses = value;
                 OnPropertyChanged();
             }
-        } = [];
+        }
 
         public double CenterX => X + 50; 
         public double CenterY => Y + 40;
 
         public event PropertyChangedEventHandler? PropertyChanged;
 
-        private void OnPropertyChanged([CallerMemberName] string? name = null)
+        protected void OnPropertyChanged([CallerMemberName] string? name = null)
         {
             PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
         }
@@ -88,4 +100,45 @@ namespace NetworkDiagram.Models
         public List<PlacedDevice> Devices { get; set; } = [];
         public List<Connection> Connections { get; set; } = [];
     }
+
+    public class ImageConverter : IValueConverter
+    {
+        public static ImageConverter Instance { get; } = new();
+
+        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+        {
+            if (value is string path && !string.IsNullOrEmpty(path))
+            {
+                try
+                {
+                    if (path.StartsWith("avares://"))
+                        return new Bitmap(AssetLoader.Open(new Uri(path)));
+                    
+                    if (File.Exists(path))
+                        return new Bitmap(path);
+
+                    // Try as relative avares
+                    var uri = new Uri($"avares://NetworkDiagram/{path.Replace("\\", "/")}");
+                    return new Bitmap(AssetLoader.Open(uri));
+                }
+                catch
+                {
+                    return null;
+                }
+            }
+            return null;
+        }
+
+        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) => throw new NotImplementedException();
+    }
+
+    public class DiagramSaveModel {
+        public List<PlacedDevice> Devices { get; set; } = [];
+        public List<ConnectionSaveModel> Connections { get; set; } = [];
+    }
+    public class ConnectionSaveModel {
+        public int StartIndex { get; set; }
+        public int EndIndex { get; set; }
+        public ConnectionType Type { get; set; }
+    }
 }