fix github comment

dlcs · Oct 14, 2024 · 6c354b8 · 6c354b8
1 parent d79ef2d
commit 6c354b8
Showing 1 changed file with 15 additions and 2 deletions.
diff --git a/src/IIIFPresentation/API/Features/Storage/Requests/CreateCollection.cs b/src/IIIFPresentation/API/Features/Storage/Requests/CreateCollection.cs
@@ -135,11 +135,24 @@ private static string ConvertToIIIFCollection(CreateCollection request, Collecti
     {
         var collectionAsIIIF = request.RawRequestBody.FromJson<IIIF.Presentation.V3.Collection>();
         var convertedIIIFCollection = collectionAsIIIF.AsJson();
-        var thumbnails = collectionAsIIIF.Thumbnail?.Select(c => c as Image).ToList(); 
-        collection.Thumbnail = thumbnails!?.GetThumbnailPath();
+        var thumbnails = collectionAsIIIF.Thumbnail?.Where(CheckThumbnailIsImage).Select(c => (Image)c).ToList();
+        if (thumbnails != null)
+        {
+            collection.Thumbnail = thumbnails.GetThumbnailPath();
+        }
         return convertedIIIFCollection;
     }
 
+    private static bool CheckThumbnailIsImage(ExternalResource externalResource)
+    {
+        if (externalResource is Image)
+        {
+            return true;
+        }
+
+        return false;
+    }
+
     private async Task UploadToS3IfRequiredAsync(CreateCollection request,
         string id, string convertedIIIFCollection, CancellationToken cancellationToken)
     {