From ae4e3bc61dd9b4d84c9a2309403ba97d27ed65a2 Mon Sep 17 00:00:00 2001
From: Ryan Nowak <nowakra@gmail.com>
Date: Wed, 30 Apr 2014 16:38:56 -0700
Subject: [PATCH] Adding controller-as-filter support

If the controller implements IFilter, it will be added to the filters
collection.

It's hardcoded to be 'first' as it was in MVC.
---
 .../Filters/DefaultFilterProvider.cs                      | 8 ++++++++
 .../Microsoft.AspNet.Mvc.Core.kproj                       | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/Microsoft.AspNet.Mvc.Core/Filters/DefaultFilterProvider.cs b/src/Microsoft.AspNet.Mvc.Core/Filters/DefaultFilterProvider.cs
index f612f3f61c..e9b8e886eb 100644
--- a/src/Microsoft.AspNet.Mvc.Core/Filters/DefaultFilterProvider.cs
+++ b/src/Microsoft.AspNet.Mvc.Core/Filters/DefaultFilterProvider.cs
@@ -88,6 +88,14 @@ namespace Microsoft.AspNet.Mvc.Filters
 
                 ApplyFilterToContainer(filterItem.Filter, filterFactory);
             }
+
+            var controllerFilter = context.ActionContext.Controller as IFilter;
+            if (controllerFilter != null)
+            {
+                // If the controller implements a filter, we want it to be the first to run.
+                var descriptor = new FilterDescriptor(controllerFilter, FilterScope.Action);
+                context.Result.Insert(0, new FilterItem(descriptor, controllerFilter));
+            }
         }
 
         private void InsertControllerAsFilter(FilterProviderContext context, IFilter controllerFilter)
diff --git a/src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj b/src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
index c99bf0c57a..8ce7dd1ad8 100644
--- a/src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
+++ b/src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj
@@ -110,6 +110,7 @@
     <Compile Include="Filters\ResultExecutionDelegate.cs" />
     <Compile Include="Filters\ResultFilterAttribute.cs" />
     <Compile Include="Filters\ServiceFilterAttribute.cs" />
+    <Compile Include="ControllerFilterProvider.cs" />
     <Compile Include="FormContext.cs" />
     <Compile Include="HttpDeleteAttribute.cs" />
     <Compile Include="HttpGetAttribute.cs" />