Add playlist-sync and group-wait to SyncPlay

MediaBrowser.Controller/SyncPlay/PlaybackRequest/SetRepeatModeGroupRequest.cs

@@ -0,0 +1,30 @@
+using System.Threading;
+using MediaBrowser.Model.SyncPlay;
+using MediaBrowser.Controller.Session;
+
+namespace MediaBrowser.Controller.SyncPlay
+{
+    /// <summary>
+    /// Class SetRepeatModeGroupRequest.
+    /// </summary>
+    public class SetRepeatModeGroupRequest : IPlaybackGroupRequest
+    {
+        /// <summary>
+        /// Gets or sets the repeat mode.
+        /// </summary>
+        /// <value>The repeat mode.</value>
+        public string Mode { get; set; }
+
+        /// <inheritdoc />
+        public PlaybackRequestType GetRequestType()
+        {
+            return PlaybackRequestType.SetRepeatMode;
+        }
+
+        /// <inheritdoc />
+        public void Apply(ISyncPlayStateContext context, ISyncPlayState state, SessionInfo session, CancellationToken cancellationToken)
+        {
+            state.HandleRequest(context, state.GetGroupState(), this, session, cancellationToken);
+        }
+    }
+}