1 files changed, 68 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Entities/AggregateFolder.cs b/MediaBrowser.Controller/Entities/AggregateFolder.cs
new file mode 100644
index 000000000..c4fda4fa2
--- /dev/null
+++ b/MediaBrowser.Controller/Entities/AggregateFolder.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace MediaBrowser.Controller.Entities
+{
+    /// <summary>
+    /// Specialized folder that can have items added to it's children by external entities.
+    /// Used for our RootFolder so plug-ins can add items.
+    /// </summary>
+    public class AggregateFolder : Folder
+    {
+        /// <summary>
+        /// The _virtual children
+        /// </summary>
+        private readonly ConcurrentBag<BaseItem> _virtualChildren = new ConcurrentBag<BaseItem>();
+
+        /// <summary>
+        /// Gets the virtual children.
+        /// </summary>
+        /// <value>The virtual children.</value>
+        public ConcurrentBag<BaseItem> VirtualChildren
+        {
+            get { return _virtualChildren; }
+        }
+
+        /// <summary>
+        /// Adds the virtual child.
+        /// </summary>
+        /// <param name="child">The child.</param>
+        /// <exception cref="System.ArgumentNullException"></exception>
+        public void AddVirtualChild(BaseItem child)
+        {
+            if (child == null)
+            {
+                throw new ArgumentNullException();
+            }
+
+            _virtualChildren.Add(child);
+        }
+
+        /// <summary>
+        /// Get the children of this folder from the actual file system
+        /// </summary>
+        /// <returns>IEnumerable{BaseItem}.</returns>
+        protected override IEnumerable<BaseItem> GetNonCachedChildren()
+        {
+            return base.GetNonCachedChildren().Concat(_virtualChildren);
+        }
+
+        /// <summary>
+        /// Finds the virtual child.
+        /// </summary>
+        /// <param name="id">The id.</param>
+        /// <returns>BaseItem.</returns>
+        /// <exception cref="System.ArgumentNullException">id</exception>
+        public BaseItem FindVirtualChild(Guid id)
+        {
+            if (id == Guid.Empty)
+            {
+                throw new ArgumentNullException("id");
+            }
+
+            return _virtualChildren.FirstOrDefault(i => i.Id == id);
+        }
+    }
+}