Update editor

Ghost.Editor.Core/Services/PreviewService.cs

@@ -0,0 +1,35 @@
+using Ghost.Editor.Core.Contracts;
+
+namespace Ghost.Editor.Core.Services;
+
+internal class PreviewService : IPreviewService
+{
+    public string GetIconPath(string path, bool isDirectory, IconSize size)
+    {
+        string iconPath;
+        if (isDirectory)
+        {
+            iconPath = "ms-appx:///Assets/EditorIcons/folder-{0}.png";
+        }
+        else
+        {
+            // TODO: Generate preview icons dynamically for known file types like images, meshes, materials, etc.
+            var ext = Path.GetExtension(path);
+            iconPath = ext switch
+            {
+                ".png" or ".jpg" or ".jpeg" or ".gif" or ".bmp" or ".tiff" or ".svg" => "ms-appx:///Assets/EditorIcons/image-{0}.png",
+                _ => "ms-appx:///Assets/EditorIcons/document-{0}.png",
+            };
+        }
+
+        var sizeIndex = size switch
+        {
+            IconSize.Small => "0",
+            IconSize.Large => "1",
+            _ => "0"
+        };
+
+        iconPath = string.Format(iconPath, sizeIndex);
+        return iconPath;
+    }
+}