update server core project

MediaBrowser.Controller/Playlists/ManualPlaylistsFolder.cs

@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Playlists;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Querying;
+using MediaBrowser.Model.Serialization;
+
+namespace MediaBrowser.Server.Implementations.Playlists
+{
+    public class PlaylistsFolder : BasePluginFolder
+    {
+        public PlaylistsFolder()
+        {
+            Name = "Playlists";
+        }
+
+        public override bool IsVisible(User user)
+        {
+            return base.IsVisible(user) && GetChildren(user, true).Any();
+        }
+
+        protected override IEnumerable<BaseItem> GetEligibleChildrenForRecursiveChildren(User user)
+        {
+            return base.GetEligibleChildrenForRecursiveChildren(user).OfType<Playlist>();
+        }
+
+        [IgnoreDataMember]
+        public override bool IsHidden
+        {
+            get
+            {
+                return true;
+            }
+        }
+
+        [IgnoreDataMember]
+        public override string CollectionType
+        {
+            get { return MediaBrowser.Model.Entities.CollectionType.Playlists; }
+        }
+
+        protected override Task<QueryResult<BaseItem>> GetItemsInternal(InternalItemsQuery query)
+        {
+            query.Recursive = false;
+            return base.GetItemsInternal(query);
+        }
+    }
+}
+