fixes #795 - Support reading Xbmc nfo's

MediaBrowser.LocalMetadata/Savers/BoxSetXmlSaver.cs

@@ -0,0 +1,68 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Threading;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using MediaBrowser.Controller.Library;
+
+namespace MediaBrowser.LocalMetadata.Savers
+{
+    public class BoxSetXmlSaver : IMetadataFileSaver
+    {
+        public string Name
+        {
+            get
+            {
+                return "Media Browser Xml";
+            }
+        }
+
+        /// <summary>
+        /// Determines whether [is enabled for] [the specified item].
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="updateType">Type of the update.</param>
+        /// <returns><c>true</c> if [is enabled for] [the specified item]; otherwise, <c>false</c>.</returns>
+        public bool IsEnabledFor(IHasMetadata item, ItemUpdateType updateType)
+        {
+            if (!item.SupportsLocalMetadata)
+            {
+                return false;
+            }
+
+            return item is BoxSet && updateType >= ItemUpdateType.MetadataDownload;
+        }
+
+        /// <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(IHasMetadata item, CancellationToken cancellationToken)
+        {
+            var builder = new StringBuilder();
+
+            builder.Append("<Item>");
+
+            XmlSaverHelpers.AddCommonNodes((BoxSet)item, builder);
+
+            builder.Append("</Item>");
+
+            var xmlFilePath = GetSavePath(item);
+
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
+        }
+
+        /// <summary>
+        /// Gets the save path.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns>System.String.</returns>
+        public string GetSavePath(IHasMetadata item)
+        {
+            return Path.Combine(item.Path, "collection.xml");
+        }
+    }
+}