move additional classes to new server lib

Emby.Server.Implementations/Sorting/StartDateComparer.cs

@@ -0,0 +1,47 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Controller.Sorting;
+using MediaBrowser.Model.Querying;
+using System;
+
+namespace Emby.Server.Implementations.Sorting
+{
+    public class StartDateComparer : IBaseItemComparer
+    {
+        /// <summary>
+        /// Compares the specified x.
+        /// </summary>
+        /// <param name="x">The x.</param>
+        /// <param name="y">The y.</param>
+        /// <returns>System.Int32.</returns>
+        public int Compare(BaseItem x, BaseItem y)
+        {
+            return GetDate(x).CompareTo(GetDate(y));
+        }
+
+        /// <summary>
+        /// Gets the date.
+        /// </summary>
+        /// <param name="x">The x.</param>
+        /// <returns>DateTime.</returns>
+        private DateTime GetDate(BaseItem x)
+        {
+            var hasStartDate = x as LiveTvProgram;
+
+            if (hasStartDate != null)
+            {
+                return hasStartDate.StartDate;
+            }
+            return DateTime.MinValue;
+        }
+
+        /// <summary>
+        /// Gets the name.
+        /// </summary>
+        /// <value>The name.</value>
+        public string Name
+        {
+            get { return ItemSortBy.StartDate; }
+        }
+    }
+}