Add UmbracoVirtualNodeByUdiRouteHandler (umbraco#6796)

* Add UmbracoVirtualNodeByUdiRouteHandler

* Parameter must be a GuidUdi

src/Umbraco.Web/Mvc/UmbracoVirtualNodeByUdiRouteHandler.cs

@@ -0,0 +1,27 @@
+using System.Web.Routing;
+using Umbraco.Core;
+using Umbraco.Core.Models.PublishedContent;
+
+namespace Umbraco.Web.Mvc
+{
+    public class UmbracoVirtualNodeByUdiRouteHandler : UmbracoVirtualNodeRouteHandler
+    {
+        private readonly Udi _realNodeUdi;
+
+        public UmbracoVirtualNodeByUdiRouteHandler(GuidUdi realNodeUdi)
+        {
+            _realNodeUdi = realNodeUdi;
+        }
+
+        protected sealed override IPublishedContent FindContent(RequestContext requestContext, UmbracoContext umbracoContext)
+        {
+            var byId = umbracoContext.Content.GetById(_realNodeUdi);
+            return byId == null ? null : FindContent(requestContext, umbracoContext, byId);
+        }
+
+        protected virtual IPublishedContent FindContent(RequestContext requestContext, UmbracoContext umbracoContext, IPublishedContent baseContent)
+        {
+            return baseContent;
+        }
+    }
+}

src/Umbraco.Web/Umbraco.Web.csproj

@@ -256,6 +256,7 @@
     <Compile Include="Models\TemplateQuery\OperatorFactory.cs" />
     <Compile Include="UmbracoContextFactory.cs" />
     <Compile Include="UmbracoContextReference.cs" />
+    <Compile Include="Mvc\UmbracoVirtualNodeByUdiRouteHandler.cs" />
     <Compile Include="ViewDataExtensions.cs" />
     <Compile Include="WebApi\Filters\AdminUsersAuthorizeAttribute.cs" />
     <Compile Include="WebApi\Filters\OnlyLocalRequestsAttribute.cs" />