Add additional params to index request

osu.Game/Online/Multiplayer/IndexPlaylistScoresRequest.cs

@@ -3,19 +3,49 @@
 
 using System.Collections.Generic;
 using Newtonsoft.Json;
+using osu.Framework.IO.Network;
+using osu.Game.Extensions;
 using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
 
 namespace osu.Game.Online.Multiplayer
 {
+    /// <summary>
+    /// Returns a list of scores for the specified playlist item.
+    /// </summary>
     public class IndexPlaylistScoresRequest : APIRequest<RoomPlaylistScores>
     {
         private readonly int roomId;
         private readonly int playlistItemId;
+        private readonly Cursor cursor;
+        private readonly MultiplayerScoresSort? sort;
 
-        public IndexPlaylistScoresRequest(int roomId, int playlistItemId)
+        public IndexPlaylistScoresRequest(int roomId, int playlistItemId, Cursor cursor = null, MultiplayerScoresSort? sort = null)
         {
             this.roomId = roomId;
             this.playlistItemId = playlistItemId;
+            this.cursor = cursor;
+            this.sort = sort;
+        }
+
+        protected override WebRequest CreateWebRequest()
+        {
+            var req = base.CreateWebRequest();
+
+            req.AddCursor(cursor);
+
+            switch (sort)
+            {
+                case MultiplayerScoresSort.Ascending:
+                    req.AddParameter("sort", "scores_asc");
+                    break;
+
+                case MultiplayerScoresSort.Descending:
+                    req.AddParameter("sort", "scores_desc");
+                    break;
+            }
+
+            return req;
         }
 
         protected override string Target => $@"rooms/{roomId}/playlist/{playlistItemId}/scores";