added user data save event

MediaBrowser.Controller/Session/ISessionController.cs

@@ -0,0 +1,61 @@
+using MediaBrowser.Model.Session;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Session
+{
+    public interface ISessionController
+    {
+        /// <summary>
+        /// Supportses the specified session.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
+        bool Supports(SessionInfo session);
+
+        /// <summary>
+        /// Sends the system command.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="command">The command.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendSystemCommand(SessionInfo session, SystemCommand command, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Sends the message command.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="command">The command.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendMessageCommand(SessionInfo session, MessageCommand command, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Sends the play command.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="command">The command.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendPlayCommand(SessionInfo session, PlayRequest command, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Sends the browse command.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="command">The command.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendBrowseCommand(SessionInfo session, BrowseRequest command, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Sends the playstate command.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <param name="command">The command.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendPlaystateCommand(SessionInfo session, PlaystateRequest command, CancellationToken cancellationToken);
+    }
+}