Add playlist-sync and group-wait to SyncPlay

MediaBrowser.Model/SyncPlay/PlayQueueUpdateReason.cs

@@ -0,0 +1,58 @@
+namespace MediaBrowser.Model.SyncPlay
+{
+    /// <summary>
+    /// Enum PlayQueueUpdateReason.
+    /// </summary>
+    public enum PlayQueueUpdateReason
+    {
+        /// <summary>
+        /// A user is requesting to play a new playlist.
+        /// </summary>
+        NewPlaylist = 0,
+
+        /// <summary>
+        /// A user is changing the playing item.
+        /// </summary>
+        SetCurrentItem = 1,
+
+        /// <summary>
+        /// A user is removing items from the playlist.
+        /// </summary>
+        RemoveItems = 2,
+
+        /// <summary>
+        /// A user is moving an item in the playlist.
+        /// </summary>
+        MoveItem = 3,
+
+        /// <summary>
+        /// A user is making changes to the queue.
+        /// </summary>
+        Queue = 4,
+
+        /// <summary>
+        /// A user is making changes to the queue.
+        /// </summary>
+        QueueNext = 5,
+
+        /// <summary>
+        /// A user is requesting the next item in queue.
+        /// </summary>
+        NextTrack = 6,
+
+        /// <summary>
+        /// A user is requesting the previous item in queue.
+        /// </summary>
+        PreviousTrack = 7,
+
+        /// <summary>
+        /// A user is changing repeat mode.
+        /// </summary>
+        RepeatMode = 8,
+
+        /// <summary>
+        /// A user is changing shuffle mode.
+        /// </summary>
+        ShuffleMode = 9
+    }
+}