Display remaining attempts for playlist rooms with room-level attempt limits

osu.Game/Online/Rooms/ItemAttemptsCount.cs

@@ -0,0 +1,19 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using Newtonsoft.Json;
+
+namespace osu.Game.Online.Rooms
+{
+    /// <summary>
+    /// Represents attempts on a specific playlist item.
+    /// </summary>
+    public class ItemAttemptsCount
+    {
+        [JsonProperty("id")]
+        public int PlaylistItemID { get; set; }
+
+        [JsonProperty("attempts")]
+        public int Attempts { get; set; }
+    }
+}

osu.Game/Online/Rooms/PlaylistAggregateScore.cs

@@ -0,0 +1,16 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using Newtonsoft.Json;
+
+namespace osu.Game.Online.Rooms
+{
+    /// <summary>
+    /// Represents aggregated score for the local user for a playlist.
+    /// </summary>
+    public class PlaylistAggregateScore
+    {
+        [JsonProperty("playlist_item_attempts")]
+        public ItemAttemptsCount[] PlaylistItemAttempts { get; set; }
+    }
+}

osu.Game/Online/Rooms/Room.cs

@@ -72,6 +72,10 @@ namespace osu.Game.Online.Rooms
         [JsonIgnore]
         public readonly Bindable<int?> MaxParticipants = new Bindable<int?>();
 
+        [Cached]
+        [JsonProperty("current_user_score")]
+        public readonly Bindable<PlaylistAggregateScore> UserScore = new Bindable<PlaylistAggregateScore>();
+
         [Cached]
         [JsonProperty("recent_participants")]
         public readonly BindableList<User> RecentParticipants = new BindableList<User>();
@@ -144,6 +148,7 @@ namespace osu.Game.Online.Rooms
             MaxParticipants.Value = other.MaxParticipants.Value;
             ParticipantCount.Value = other.ParticipantCount.Value;
             EndDate.Value = other.EndDate.Value;
+            UserScore.Value = other.UserScore.Value;
 
             if (EndDate.Value != null && DateTimeOffset.Now >= EndDate.Value)
                 Status.Value = new RoomStatusEnded();

osu.Game/Screens/OnlinePlay/Components/RoomLocalUserInfo.cs

@@ -1,7 +1,9 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Linq;
 using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Graphics;
@@ -39,12 +41,27 @@ namespace osu.Game.Screens.OnlinePlay.Components
         {
             base.LoadComplete();
 
-            MaxAttempts.BindValueChanged(attempts =>
+            MaxAttempts.BindValueChanged(_ => updateAttempts());
+            UserScore.BindValueChanged(_ => updateAttempts(), true);
+        }
+
+        private void updateAttempts()
+        {
+            if (MaxAttempts.Value != null)
             {
-                attemptDisplay.Text = attempts.NewValue == null
-                    ? string.Empty
-                    : $"Maximum attempts: {attempts.NewValue:N0}";
-            }, true);
+                attemptDisplay.Text = $"Maximum attempts: {MaxAttempts.Value:N0}";
+
+                if (UserScore.Value != null)
+                {
+                    int remaining = MaxAttempts.Value.Value - UserScore.Value.PlaylistItemAttempts.Sum(a => a.Attempts);
+                    attemptDisplay.Text += $" ({remaining} remaining)";
+                }
+            }
+
+            else
+            {
+                attemptDisplay.Text = string.Empty;
+            }
         }
     }
 }

osu.Game/Screens/OnlinePlay/OnlinePlayComposite.cs

@@ -42,6 +42,9 @@ namespace osu.Game.Screens.OnlinePlay
         [Resolved(typeof(Room))]
         protected Bindable<int?> MaxAttempts { get; private set; }
 
+        [Resolved(typeof(Room))]
+        public Bindable<PlaylistAggregateScore> UserScore { get; private set; }
+
         [Resolved(typeof(Room))]
         protected Bindable<DateTimeOffset?> EndDate { get; private set; }