update child count creation

MediaBrowser.Controller/Entities/Folder.cs

@@ -666,6 +666,27 @@ namespace MediaBrowser.Controller.Entities
             });
         }
 
+        public virtual int GetChildCount(User user)
+        {
+            if (LinkedChildren.Count > 0)
+            {
+                if (!(this is ICollectionFolder))
+                {
+                    return GetChildren(user, true).Count();
+                }
+            }
+
+            var result = GetItems(new InternalItemsQuery(user)
+            {
+                Recursive = false,
+                Limit = 0,
+                ParentId = Id
+
+            }).Result;
+
+            return result.TotalRecordCount;
+        }
+
         public QueryResult<BaseItem> QueryRecursive(InternalItemsQuery query)
         {
             var user = query.User;

MediaBrowser.Controller/Entities/TV/Season.cs

@@ -75,6 +75,11 @@ namespace MediaBrowser.Controller.Entities.TV
             return list;
         }
 
+        public override int GetChildCount(User user)
+        {
+            return GetChildren(user, true).Count();
+        }
+
         /// <summary>
         /// This Episode's Series Instance
         /// </summary>

MediaBrowser.Controller/Entities/TV/Series.cs

@@ -111,6 +111,20 @@ namespace MediaBrowser.Controller.Entities.TV
             }
         }
 
+        public override int GetChildCount(User user)
+        {
+            var result = LibraryManager.GetItemsResult(new InternalItemsQuery(user)
+            {
+                AncestorWithPresentationUniqueKey = PresentationUniqueKey,
+                IncludeItemTypes = new[] { typeof(Season).Name },
+                SortBy = new[] { ItemSortBy.SortName },
+                IsVirtualItem = false,
+                Limit = 0
+            });
+
+            return result.TotalRecordCount;
+        }
+
         /// <summary>
         /// Gets the user data key.
         /// </summary>

MediaBrowser.Controller/Entities/UserRootFolder.cs

@@ -38,6 +38,11 @@ namespace MediaBrowser.Controller.Entities
             return PostFilterAndSort(result.Where(filter), query);
         }
 
+        public override int GetChildCount(User user)
+        {
+            return GetChildren(user, true).Count();
+        }
+
         [IgnoreDataMember]
         protected override bool SupportsShortcutChildren
         {

MediaBrowser.Controller/Entities/UserView.cs

@@ -45,6 +45,11 @@ namespace MediaBrowser.Controller.Entities
             return list;
         }
 
+        public override int GetChildCount(User user)
+        {
+            return GetChildren(user, true).Count();
+        }
+
         protected override Task<QueryResult<BaseItem>> GetItemsInternal(InternalItemsQuery query)
         {
             var parent = this as Folder;

MediaBrowser.Controller/Library/ILibraryManager.cs

@@ -150,13 +150,6 @@ namespace MediaBrowser.Controller.Library
         /// <returns>BaseItem.</returns>
         BaseItem GetItemById(Guid id);
 
-        /// <summary>
-        /// Gets the memory item by identifier.
-        /// </summary>
-        /// <param name="id">The identifier.</param>
-        /// <returns>BaseItem.</returns>
-        BaseItem GetMemoryItemById(Guid id);
-
         /// <summary>
         /// Gets the intros.
         /// </summary>