Add GPL modules

MediaBrowser.Controller/Entities/IHasTrailers.cs

@@ -0,0 +1,39 @@
+using MediaBrowser.Model.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace MediaBrowser.Controller.Entities
+{
+    public interface IHasTrailers : IHasProviderIds
+    {
+        /// <summary>
+        /// Gets or sets the remote trailers.
+        /// </summary>
+        /// <value>The remote trailers.</value>
+        MediaUrl[] RemoteTrailers { get; set; }
+
+        /// <summary>
+        /// Gets or sets the local trailer ids.
+        /// </summary>
+        /// <value>The local trailer ids.</value>
+        Guid[] LocalTrailerIds { get; set; }
+        Guid[] RemoteTrailerIds { get; set; }
+        Guid Id { get; set; }
+    }
+
+    public static class HasTrailerExtensions
+    {
+        /// <summary>
+        /// Gets the trailer ids.
+        /// </summary>
+        /// <returns>List&lt;Guid&gt;.</returns>
+        public static List<Guid> GetTrailerIds(this IHasTrailers item)
+        {
+            var list = item.LocalTrailerIds.ToList();
+            list.AddRange(item.RemoteTrailerIds);
+            return list;
+        }
+
+    }
+}