added movie, series, folder and episode xml saving support

MediaBrowser.Providers/Savers/FolderXmlSaver.cs

@@ -0,0 +1,60 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using MediaBrowser.Controller.Entities.TV;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Entities;
+using System.IO;
+using System.Text;
+using System.Threading;
+
+namespace MediaBrowser.Providers.Savers
+{
+    public class FolderXmlSaver : IMetadataSaver
+    {
+        /// <summary>
+        /// Supportses the specified item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
+        public bool Supports(BaseItem item)
+        {
+            if (item.LocationType != LocationType.FileSystem)
+            {
+                return false;
+            }
+
+            return item is Folder && !(item is Series) && !(item is BoxSet);
+        }
+
+        /// <summary>
+        /// Saves the specified item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        public void Save(BaseItem item, CancellationToken cancellationToken)
+        {
+            var builder = new StringBuilder();
+
+            builder.Append("<Item>");
+
+            XmlHelpers.AddCommonNodes(item, builder);
+
+            builder.Append("</Item>");
+
+            var xmlFilePath = GetSavePath(item);
+
+            XmlHelpers.Save(builder, xmlFilePath);
+        }
+
+        /// <summary>
+        /// Gets the save path.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns>System.String.</returns>
+        public string GetSavePath(BaseItem item)
+        {
+            return Path.Combine(item.Path, "folder.xml");
+        }
+    }
+}