Gets the messages being pumped out to the UI. Updates the ContentService and MediaServices to have a SaveWithStatus in order to determine the response, we'll need to update most of the methods to also have this OperationStatus. Now messages can be added to the UI for Saving & publishing for media and content services, we'll need to update more to support everything.

src/Umbraco.Web/WebApi/Filters/AppendCurrentEventMessagesAttribute.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Net.Http;
+using System.Web.Http.Filters;
+using Umbraco.Core.Events;
+using Umbraco.Web.Models.ContentEditing;
+using Umbraco.Web.UI;
+
+namespace Umbraco.Web.WebApi.Filters
+{
+    /// <summary>
+    /// Automatically checks if any request is a non-GET and if the 
+    /// resulting message is INotificationModel in which case it will append any Event Messages
+    /// currently in the request.
+    /// </summary>
+    internal sealed class AppendCurrentEventMessagesAttribute : ActionFilterAttribute
+    {
+        public override void OnActionExecuted(HttpActionExecutedContext context)
+        {
+            if (context.Response == null) return;
+            if (context.Response.IsSuccessStatusCode == false) return;
+            if (context.Request.Method == HttpMethod.Get) return;
+            if (UmbracoContext.Current == null) return;
+
+            var obj = context.Response.Content as ObjectContent;
+            if (obj == null) return;
+
+            var notifications = obj.Value as INotificationModel;
+            if (notifications == null) return;
+
+            var msgs = UmbracoContext.Current.GetCurrentEventMessages();
+            if (msgs == null) return;
+
+            foreach (var eventMessage in msgs.GetAll())
+            {
+                SpeechBubbleIcon msgType;
+                switch (eventMessage.MessageType)
+                {
+                    case EventMessageType.Default:
+                        msgType = SpeechBubbleIcon.Save;
+                        break;
+                    case EventMessageType.Info:
+                        msgType = SpeechBubbleIcon.Info;
+                        break;
+                    case EventMessageType.Error:
+                        msgType = SpeechBubbleIcon.Error;
+                        break;
+                    case EventMessageType.Success:
+                        msgType = SpeechBubbleIcon.Success;
+                        break;
+                    case EventMessageType.Warning:
+                        msgType = SpeechBubbleIcon.Warning;
+                        break;
+                    default:
+                        throw new ArgumentOutOfRangeException();
+                }
+
+                notifications.Notifications.Add(new Notification
+                {
+                    Message = eventMessage.Message,
+                    Header = eventMessage.Category,
+                    NotificationType = msgType
+                });
+            }
+        }
+    }
+}

src/Umbraco.Web/WebApi/Filters/OutgoingDateTimeFormatAttribute.cs

@@ -2,7 +2,6 @@
 using System.Linq;
 using System.Net.Http.Formatting;
 using System.Web.Http.Controllers;
-using System.Web.Http.Filters;
 using Umbraco.Core;
 
 namespace Umbraco.Web.WebApi.Filters
@@ -10,7 +9,7 @@ namespace Umbraco.Web.WebApi.Filters
     /// <summary>
     /// Sets the json outgoing/serialized datetime format
     /// </summary>
-    internal sealed class OutgoingDateTimeFormatAttribute :  Attribute, IControllerConfiguration
+    internal sealed class OutgoingDateTimeFormatAttribute : Attribute, IControllerConfiguration
     {
         private readonly string _format = "yyyy-MM-dd HH:mm:ss";
 
@@ -27,8 +26,9 @@ namespace Umbraco.Web.WebApi.Filters
         /// <summary>
         /// Will use the standard ISO format
         /// </summary>
-        public OutgoingDateTimeFormatAttribute(){
-            
+        public OutgoingDateTimeFormatAttribute()
+        {
+
         }
 
         public void Initialize(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor)