U4-7641 - bugfix + implement for media types

src/Umbraco.Core/Models/IMediaType.cs

@@ -7,6 +7,12 @@ namespace Umbraco.Core.Models
     /// </summary
     public interface IMediaType : IContentTypeComposition
     {
-         
+
+        /// <summary>
+        /// Creates a deep clone of the current entity with its identity/alias and it's property identities reset
+        /// </summary>
+        /// <param name="newAlias"></param>
+        /// <returns></returns>
+        IMediaType DeepCloneWithResetIdentities(string newAlias);
     }
 }

src/Umbraco.Core/Models/MediaType.cs

@@ -38,5 +38,30 @@ namespace Umbraco.Core.Models
             : base(parent, alias)
         {
         }
+
+        /// <summary>
+        /// Creates a deep clone of the current entity with its identity/alias and it's property identities reset
+        /// </summary>
+        /// <returns></returns>
+        public IMediaType DeepCloneWithResetIdentities(string alias)
+        {
+            var clone = (MediaType)DeepClone();
+            clone.Alias = alias;
+            clone.Key = Guid.Empty;
+            foreach (var propertyGroup in clone.PropertyGroups)
+            {
+                propertyGroup.ResetIdentity();
+                propertyGroup.ResetDirtyProperties(false);
+            }
+            foreach (var propertyType in clone.PropertyTypes)
+            {
+                propertyType.ResetIdentity();
+                propertyType.ResetDirtyProperties(false);
+            }
+
+            clone.ResetIdentity();
+            clone.ResetDirtyProperties(false);
+            return clone;
+        }
     }
 }