Restored type check for NuCache status controller.

Added service located extension method for retrieving creator and writer name.

src/Umbraco.Infrastructure.PublishedCache/Umbraco.Infrastructure.PublishedCache.csproj

@@ -15,6 +15,9 @@
     </ItemGroup>
 
     <ItemGroup>
+        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+            <_Parameter1>Umbraco.Web</_Parameter1>
+        </AssemblyAttribute>
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests</_Parameter1>
         </AssemblyAttribute>

src/Umbraco.Web/Editors/NuCacheStatusController.cs

@@ -21,12 +21,10 @@ namespace Umbraco.Web.Editors
         {
             get
             {
-                // TODO: do we need this?
-                //var svc = _publishedSnapshotService as PublishedSnapshotService;
-                //if (svc == null)
-                //    throw new NotSupportedException("Not running NuCache.");
-                // return svc;
-                return _publishedSnapshotService;
+                var svc = _publishedSnapshotService as PublishedSnapshotService;
+                if (svc == null)
+                    throw new NotSupportedException("Not running NuCache.");
+                return svc;
             }
         }
 

src/Umbraco.Web/PublishedContentExtensions.cs

@@ -28,6 +28,7 @@ namespace Umbraco.Web
         private static UmbracoContext UmbracoContext => Current.UmbracoContext;
         private static ISiteDomainHelper SiteDomainHelper => Current.Factory.GetInstance<ISiteDomainHelper>();
         private static IVariationContextAccessor VariationContextAccessor => Current.VariationContextAccessor;
+        private static IUserService UserService => Current.Services.UserService;
 
         #region IsComposedOf
 
@@ -795,6 +796,20 @@ namespace Umbraco.Web
 
         #endregion
 
+        #region Writer and creator
+
+        public static string CreatorName(this IPublishedContent content)
+        {
+            return content.GetCreatorName(UserService);
+        }
+
+        public static string WriterName(this IPublishedContent content)
+        {
+            return content.GetWriterName(UserService);
+        }
+
+        #endregion
+
         #region Url
 
         /// <summary>