Add GPL modules

MediaBrowser.Controller/Providers/IMetadataService.cs

@@ -0,0 +1,34 @@
+using System;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Providers
+{
+    public interface IMetadataService
+    {
+        /// <summary>
+        /// Determines whether this instance can refresh the specified item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns><c>true</c> if this instance can refresh the specified item; otherwise, <c>false</c>.</returns>
+        bool CanRefresh(BaseItem item);
+        bool CanRefreshPrimary(Type type);
+
+        /// <summary>
+        /// Refreshes the metadata.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="refreshOptions">The options.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task<ItemUpdateType> RefreshMetadata(BaseItem item, MetadataRefreshOptions refreshOptions, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the order.
+        /// </summary>
+        /// <value>The order.</value>
+        int Order { get; }
+    }
+}