Fix content hub previews of items with image asset

src/Kentico.Xperience.UMT/InfoAdapter/ContentItemSimplifiedAdapter.cs

@@ -1,9 +1,12 @@
-using CMS.ContentEngine;
+using System.Text.Json;
+
+using CMS.ContentEngine;
 using CMS.ContentEngine.Internal;
 using CMS.Core;
 using CMS.Core.Internal;
 using CMS.DataEngine;
 using CMS.FormEngine;
+using CMS.Helpers;
 using CMS.Membership;
 using CMS.Websites;
 using CMS.Websites.Internal;
@@ -244,7 +247,7 @@ public ContentItemInfo Adapt(IUmtModel input)
                 ContentItemLanguageMetadataCreatedByUserGuid = languageData.UserGuid,
                 ContentItemLanguageMetadataModifiedWhen = null,
                 ContentItemLanguageMetadataModifiedByUserGuid = languageData.UserGuid,
-                // ContentItemLanguageMetadataHasImageAsset = null,
+                ContentItemLanguageMetadataHasImageAsset = languageData.ContentItemData?.Values.Any(IsImageAsset) ?? false,
                 ContentItemLanguageMetadataContentLanguageGuid = contentLanguageInfo.ContentLanguageGUID,
                 ContentItemLanguageMetadataScheduledPublishWhen = languageData.ScheduledPublishWhen,
                 ContentItemLanguageMetadataScheduledUnpublishWhen = languageData.ScheduledUnpublishWhen
@@ -454,4 +457,24 @@ private static IEnumerable<FormFieldInfo> UnpackReusableFieldSchemas(IEnumerable
     }
 
     Guid? IInfoAdapter<IUmtModel>.GetUniqueIdOrNull(IUmtModel input) => input is ContentItemSimplifiedModel sm ? sm.ContentItemGUID : null;
+
+    private static bool IsImageAsset(object? value)
+    {
+        if (value is JsonElement { ValueKind: JsonValueKind.Object } element && element.GetProperty(AssetSource.DISCRIMINATOR_PROPERTY).GetString() is { })
+        {
+            var assetSource = element.Deserialize<AssetSource>();
+            if (assetSource is not null)
+            {
+                return ImageHelper.IsImage(assetSource.InferExtension());
+            }
+            else
+            {
+                throw new InvalidOperationException($"JSON object with property {AssetSource.DISCRIMINATOR_PROPERTY} cannot be deserialized");
+            }
+        }
+        else
+        {
+            return false;
+        }
+    }
 }

src/Kentico.Xperience.UMT/Model/Auxiliary/AssetSource.cs

@@ -14,10 +14,8 @@ namespace Kentico.Xperience.UMT.Model;
 public class AssetSource
 {
     public const string DISCRIMINATOR_PROPERTY = "$assetType";
-
     [Required]
     public Guid? ContentItemGuid { get; set; }
-
     [Required]
     public Guid? Identifier { get; set; }
     [Required]
@@ -26,13 +24,17 @@ public class AssetSource
     public string? Extension { get; set; }
     public long? Size { get; set; }
     public DateTime? LastModified { get; set; }
+
+    public virtual string InferExtension() => Extension ?? throw new InvalidOperationException($"{nameof(AssetFileSource)} has unknown extension. Specify explicitly by {nameof(Extension)} property");
 }
 
 
 public class AssetFileSource : AssetSource
 {
     [Required]
     public string? FilePath { get; set; }
+
+    public override string InferExtension() => Extension ?? CMS.IO.FileInfo.New(FilePath).Extension ?? throw new InvalidOperationException($"{nameof(AssetFileSource)} has unknown extension. Specify explicitly by {nameof(Extension)} property");
 }
 
 public class AssetUrlSource : AssetSource
@@ -44,5 +46,5 @@ public class AssetUrlSource : AssetSource
 public class AssetDataSource : AssetSource
 {
     [Required]
-    public byte[]? Data { get; set; } 
+    public byte[]? Data { get; set; }
 }

src/Kentico.Xperience.UMT/Services/AssetManager.cs

@@ -37,7 +37,7 @@ public async Task<ContentItemAssetMetadata> SetAsset(string className, AssetSour
 
                     var assetMetadata = new ContentItemAssetMetadata
                     {
-                        Extension = byteSource.Extension,
+                        Extension = assetSource.InferExtension(),
                         Identifier = byteSource.Identifier.Value,
                         LastModified = byteSource.LastModified ?? dateTimeNowService.GetDateTimeNow(),
                         Name = byteSource.Name,
@@ -58,7 +58,7 @@ public async Task<ContentItemAssetMetadata> SetAsset(string className, AssetSour
                     var file = CMS.IO.FileInfo.New(fileSource.FilePath);
                     var assetMetadata = new ContentItemAssetMetadata
                     {
-                        Extension = fileSource.Extension ?? file.Extension,
+                        Extension = assetSource.InferExtension(),
                         Identifier = fileSource.Identifier.Value,
                         LastModified = fileSource.LastModified ?? dateTimeNowService.GetDateTimeNow(),
                         Name = fileSource.Name ?? file.Name,
@@ -77,7 +77,7 @@ public async Task<ContentItemAssetMetadata> SetAsset(string className, AssetSour
 
                     var assetMetadata = new ContentItemAssetMetadata
                     {
-                        Extension = urlSource.Extension,
+                        Extension = assetSource.InferExtension(),
                         Identifier = urlSource.Identifier.Value,
                         LastModified = urlSource.LastModified ?? dateTimeNowService.GetDateTimeNow(),
                         Name = urlSource.Name,