Element preview

src/AppCommon/FileTime.App.Core/ViewModels/ItemPreview/ElementPreviewViewModel.cs

@@ -0,0 +1,39 @@
+using System.Text;
+using FileTime.App.Core.Models;
+using FileTime.Core.Models;
+using InitableService;
+using MvvmGen;
+
+namespace FileTime.App.Core.ViewModels.ItemPreview;
+
+[ViewModel]
+public partial class ElementPreviewViewModel : IItemPreviewViewModel, IAsyncInitable<IElement>
+{
+    private const int MaxTextPreviewSize = 1024 * 1024;
+    
+    public ItemPreviewMode Mode { get; private set; }
+
+    [Property] private string? _textContent;
+    
+    public async Task InitAsync(IElement element)
+    {
+        try
+        {
+            var content = await element.Provider.GetContentAsync(element, MaxTextPreviewSize);
+
+            TextContent = content is null
+                ? "Could not read any data from file " + element.Name
+                : Encoding.UTF8.GetString(content);
+        }
+        catch(Exception ex)
+        {
+            TextContent = $"Error while getting content of {element.FullName}. " + ex.ToString();
+        }
+
+        Mode = (TextContent?.Length ?? 0) switch
+        {
+            0 => ItemPreviewMode.Empty,
+            _ => ItemPreviewMode.Text
+        };
+    }
+}