New: Backend changes for new UI

src/Radarr.Http/ResourceChangeMessage.cs

@@ -0,0 +1,29 @@
+using System;
+using NzbDrone.Core.Datastore.Events;
+using Radarr.Http.REST;
+
+namespace Radarr.Http
+{
+    public class ResourceChangeMessage<TResource> where TResource : RestResource
+    {
+        public TResource Resource { get; private set; }
+        public ModelAction Action { get; private set; }
+
+        public ResourceChangeMessage(ModelAction action)
+        {
+            if (action != ModelAction.Deleted && action != ModelAction.Sync)
+            {
+                throw new InvalidOperationException("Resource message without a resource needs to have Delete or Sync as action");
+            }
+
+            Action = action;
+        }
+
+        public ResourceChangeMessage(TResource resource, ModelAction action)
+        {
+            Resource = resource;
+            Action = action;
+        }
+    }
+
+}