wip retrieve image from db

Wallet.Avalonia/App.axaml.cs

@@ -114,7 +114,10 @@ public partial class App : Application
                         services.AddHandler<CreateProfileImageHandler>();
 
                         services.AddHandler<QueryWalletHandler>();
+
                         services.AddHandler<ItemHandler>();
+                        services.AddHandler<ItemImageHandler>();
+                  
                         services.AddHandler<CreateItemHandler>();
                         services.AddHandler<DeleteItemHandler>();
                         services.AddHandler<UpdateItemHander>();

Wallet/ItemHandler.cs

@@ -22,6 +22,7 @@ public class ItemHandler(IDbContextFactory<WalletContext> dbContextFactory) :
                 {
                     x.Id,
                     x.Name,
+                    HasImage = x.ImageId != null,
                     x.Description,
                     x.Category,
                     Blob = x.Blobs

Wallet/ItemImage.cs

@@ -0,0 +1,5 @@
+namespace Wallet;
+
+public record ItemImage;
+
+public record ItemImage<TValue>(TValue Value);

Wallet/ItemImageHandler.cs

@@ -0,0 +1,38 @@
+using Wallet.Data;
+using Microsoft.EntityFrameworkCore;
+using Toolkit.Foundation;
+
+namespace Wallet;
+
+public class ItemImageHandler(IDbContextFactory<WalletContext> dbContextFactory,
+    IImageReader imageReader) :
+    IHandler<RequestEventArgs<ItemImage<Guid>>, IImageDescriptor?>
+{
+    public async Task<IImageDescriptor?> Handle(RequestEventArgs<ItemImage<Guid>> args,
+        CancellationToken cancellationToken)
+    {
+        if (args.Sender is ItemImage<Guid> item)
+        {
+            Guid id = item.Value;
+
+            using WalletContext context = await dbContextFactory.CreateDbContextAsync(cancellationToken);
+            var result = await context.Set<ItemEntry>()
+                .Where(x => x.Id == id)
+                .Select(x => new
+                {
+                    x.Image
+                })
+                .FirstOrDefaultAsync(cancellationToken);
+
+            if (result is not null && 
+                result.Image is BlobEntry image &&
+                image.Data is { Length: > 0 } data)
+            {
+                MemoryStream stream = new(data);
+                return imageReader.Get(stream, 200, 200, true);
+            }
+        }
+
+        return default;
+    }
+}