AB#5819 - Moved composing of core/infrastructure items into CoreInitialComposer

src/Umbraco.Core/DefaultEventMessagesFactory.cs

@@ -0,0 +1,29 @@
+using System;
+using Umbraco.Core.Events;
+
+namespace Umbraco.Web
+{
+    public class DefaultEventMessagesFactory : IEventMessagesFactory
+    {
+        private readonly IEventMessagesAccessor _eventMessagesAccessor;
+
+        public DefaultEventMessagesFactory(IEventMessagesAccessor eventMessagesAccessor)
+        {
+            if (eventMessagesAccessor == null) throw new ArgumentNullException(nameof(eventMessagesAccessor));
+            _eventMessagesAccessor = eventMessagesAccessor;
+        }
+
+        public EventMessages Get()
+        {
+            var eventMessages = _eventMessagesAccessor.EventMessages;
+            if (eventMessages == null)
+                _eventMessagesAccessor.EventMessages = eventMessages = new EventMessages();
+            return eventMessages;
+        }
+
+        public EventMessages GetOrDefault()
+        {
+            return _eventMessagesAccessor.EventMessages;
+        }
+    }
+}