1 files changed, 73 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Entities/LinkedChild.cs b/MediaBrowser.Controller/Entities/LinkedChild.cs
new file mode 100644
index 000000000..363a3d6fd
--- /dev/null
+++ b/MediaBrowser.Controller/Entities/LinkedChild.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Serialization;
+
+namespace MediaBrowser.Controller.Entities
+{
+    public class LinkedChild
+    {
+        public string Path { get; set; }
+        public LinkedChildType Type { get; set; }
+        public string LibraryItemId { get; set; }
+
+        [IgnoreDataMember]
+        public string Id { get; set; }
+
+        /// <summary>
+        /// Serves as a cache
+        /// </summary>
+        public Guid? ItemId { get; set; }
+
+        public static LinkedChild Create(BaseItem item)
+        {
+            var child = new LinkedChild
+            {
+                Path = item.Path,
+                Type = LinkedChildType.Manual
+            };
+
+            if (string.IsNullOrEmpty(child.Path))
+            {
+                child.LibraryItemId = item.Id.ToString("N");
+            }
+
+            return child;
+        }
+
+        public LinkedChild()
+        {
+            Id = Guid.NewGuid().ToString("N");
+        }
+    }
+
+    public enum LinkedChildType
+    {
+        Manual = 0,
+        Shortcut = 1
+    }
+
+    public class LinkedChildComparer : IEqualityComparer<LinkedChild>
+    {
+        private readonly IFileSystem _fileSystem;
+
+        public LinkedChildComparer(IFileSystem fileSystem)
+        {
+            _fileSystem = fileSystem;
+        }
+
+        public bool Equals(LinkedChild x, LinkedChild y)
+        {
+            if (x.Type == y.Type)
+            {
+                return _fileSystem.AreEqual(x.Path, y.Path);
+            }
+            return false;
+        }
+
+        public int GetHashCode(LinkedChild obj)
+        {
+            return ((obj.Path ?? string.Empty) + (obj.LibraryItemId ?? string.Empty) + obj.Type).GetHashCode();
+        }
+    }
+}