Fixes: U4-5065 Add event to modify the model on front-end for IRenderMvcControllers

src/Umbraco.Web/Mvc/ActionExecutedEventArgs.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace Umbraco.Web.Mvc
+{
+    public class ActionExecutedEventArgs : EventArgs
+    {
+        public UmbracoController Controller { get; set; }
+        public object Model { get; set; }
+        
+        public ActionExecutedEventArgs(UmbracoController controller, object model)
+        {
+            Controller = controller;
+            Model = model;            
+        }
+    }
+}

src/Umbraco.Web/Mvc/IRenderMvcController.cs

@@ -1,4 +1,6 @@
+using System.Web.Http.Filters;
 using System.Web.Mvc;
+using System.Windows.Forms;
 using Umbraco.Web.Models;
 
 namespace Umbraco.Web.Mvc

src/Umbraco.Web/Mvc/PreRenderViewActionFilterAttribute.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Web.Mvc;
+
+namespace Umbraco.Web.Mvc
+{
+    public class PreRenderViewActionFilterAttribute : ActionFilterAttribute
+    {
+        public override void OnActionExecuted(ActionExecutedContext filterContext)
+        {
+            var umbController = filterContext.Controller as UmbracoController;
+            if (umbController == null)
+            {
+                return;
+            }
+
+            var result = filterContext.Result as ViewResultBase;
+            if (result == null)
+            {             
+                return;
+            }
+
+            var model = result.Model;
+            if (model == null)
+            {                
+                return;
+            }
+
+            var args = new ActionExecutedEventArgs(umbController, model);
+            OnActionExecuted(args);
+
+            if (args.Model != model)
+            {
+                result.ViewData.Model = args.Model;
+            }
+
+            base.OnActionExecuted(filterContext);
+        }
+
+
+        public static event EventHandler<ActionExecutedEventArgs> ActionExecuted;
+
+        private static void OnActionExecuted(ActionExecutedEventArgs e)
+        {
+            EventHandler<ActionExecutedEventArgs> handler = ActionExecuted;
+            if (handler != null) handler(null, e);
+        }
+    }
+}

src/Umbraco.Web/Mvc/RenderMvcController.cs

@@ -15,6 +15,7 @@ namespace Umbraco.Web.Mvc
     /// <summary>
     /// A controller to render front-end requests
     /// </summary>
+    [PreRenderViewActionFilter]
     public class RenderMvcController : UmbracoController, IRenderMvcController
 	{
 

src/Umbraco.Web/Mvc/UmbracoController.cs

@@ -35,7 +35,7 @@ namespace Umbraco.Web.Mvc
         /// <summary>
         /// Returns the current UmbracoContext
         /// </summary>
-        protected UmbracoContext UmbracoContext { get; private set; }
+        public UmbracoContext UmbracoContext { get; private set; }
 
         /// <summary>
         /// Returns the current ApplicationContext

src/Umbraco.Web/Umbraco.Web.csproj

@@ -361,6 +361,8 @@
     <Compile Include="Models\PartialViewMacroModelExtensions.cs" />
     <Compile Include="Models\PostRedirectModel.cs" />
     <Compile Include="Models\PublishedProperty.cs" />
+    <Compile Include="Mvc\ActionExecutedEventArgs.cs" />
+    <Compile Include="Mvc\PreRenderViewActionFilterAttribute.cs" />
     <Compile Include="Mvc\RedirectToUmbracoUrlResult.cs" />
     <Compile Include="PropertyEditors\TagsDataController.cs" />
     <Compile Include="PublishedCache\MemberPublishedContent.cs" />