rework refresh queue

MediaBrowser.Providers/Manager/GenericPriorityQueueNode.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Priority_Queue
+{
+    /// Credit: https://github.com/BlueRaja/High-Speed-Priority-Queue-for-C-Sharp
+    public class GenericPriorityQueueNode<TPriority>
+    {
+        /// <summary>
+        /// The Priority to insert this node at.  Must be set BEFORE adding a node to the queue (ideally just once, in the node's constructor).
+        /// Should not be manually edited once the node has been enqueued - use queue.UpdatePriority() instead
+        /// </summary>
+        public TPriority Priority { get; protected internal set; }
+
+        /// <summary>
+        /// Represents the current position in the queue
+        /// </summary>
+        public int QueueIndex { get; internal set; }
+
+        /// <summary>
+        /// Represents the order the node was inserted in
+        /// </summary>
+        public long InsertionIndex { get; internal set; }
+    }
+}