Controllers/Managers/CoverArtManager.cs

@@ -138,8 +138,9 @@ public class CoverArtManager : BaseManager
 
         try
         {
+            MetadataRetriever metaData = new MetadataRetriever();
             var dirMgr = new DirectoryManager(_rootCoverArtPath);
-            var defaultExtension = ".png";
+            var defaultExtension = "." + metaData.FileExtensionType(data);
             dirMgr.CreateDirectory(song);
 
             var segment = cover.GenerateFilename(0);

Controllers/Utilities/MetadataRetriever.cs

@@ -95,6 +95,26 @@ public class MetadataRetriever
         }
     }
 
+    public string FileExtensionType(IFormFile file)
+    {
+        using (var fileStream = file.OpenReadStream())
+        {
+            var isRecognizableType = FileTypeChecker.FileTypeValidator.IsTypeRecognizable(fileStream);
+
+            if (!isRecognizableType)
+            {
+                return string.Empty;
+            }
+
+
+            var fileType = FileTypeChecker.FileTypeValidator.GetFileType(fileStream);
+            Console.WriteLine($"Filetype: {fileType}");
+            Console.WriteLine($"Extension: {fileType.Extension}");
+
+            return fileType.Extension;
+        }
+    }
+
     public Song RetrieveMetaData(string filePath)
     {
         Song song = new Song();