Add header class and basic flow for propagating data updates

osu.Game.Tests/Visual/Gameplay/TestSceneSpectator.cs

@@ -17,6 +17,7 @@ using osu.Game.Replays.Legacy;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Replays;
 using osu.Game.Rulesets.UI;
+using osu.Game.Scoring;
 using osu.Game.Screens.Play;
 using osu.Game.Tests.Beatmaps.IO;
 using osu.Game.Users;
@@ -272,7 +273,7 @@ namespace osu.Game.Tests.Visual.Gameplay
                     frames.Add(new LegacyReplayFrame(i * 100, RNG.Next(0, 512), RNG.Next(0, 512), buttonState));
                 }
 
-                var bundle = new FrameDataBundle(frames);
+                var bundle = new FrameDataBundle(new ScoreInfo(), frames);
                 ((ISpectatorClient)this).UserSentFrames(StreamingUser.Id, bundle);
 
                 if (!sentState)

osu.Game/Online/Spectator/FrameDataBundle.cs

@@ -1,20 +1,26 @@
 // 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.
 
+#nullable enable
+
 using System;
 using System.Collections.Generic;
 using osu.Game.Replays.Legacy;
+using osu.Game.Scoring;
 
 namespace osu.Game.Online.Spectator
 {
     [Serializable]
     public class FrameDataBundle
     {
+        public FrameHeader Header { get; set; }
+
         public IEnumerable<LegacyReplayFrame> Frames { get; set; }
 
-        public FrameDataBundle(IEnumerable<LegacyReplayFrame> frames)
+        public FrameDataBundle(ScoreInfo score, IEnumerable<LegacyReplayFrame> frames)
         {
             Frames = frames;
+            Header = new FrameHeader(score);
         }
     }
 }

osu.Game/Online/Spectator/FrameHeader.cs

@@ -0,0 +1,35 @@
+// 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.
+
+#nullable enable
+
+using System;
+using System.Collections.Generic;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
+
+namespace osu.Game.Online.Spectator
+{
+    [Serializable]
+    public class FrameHeader
+    {
+        public int Combo { get; set; }
+
+        public int MaxCombo { get; set; }
+
+        public Dictionary<HitResult, int> Statistics = new Dictionary<HitResult, int>();
+
+        /// <summary>
+        /// Construct header summary information from a point-in-time reference to a score which is actively being played.
+        /// </summary>
+        /// <param name="score">The score for reference.</param>
+        public FrameHeader(ScoreInfo score)
+        {
+            Combo = score.Combo;
+            MaxCombo = score.MaxCombo;
+
+            foreach (var kvp in score.Statistics)
+                Statistics[kvp.Key] = kvp.Value;
+        }
+    }
+}

osu.Game/Online/Spectator/SpectatorStreamingClient.cs

@@ -21,6 +21,7 @@ using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Replays.Types;
+using osu.Game.Scoring;
 using osu.Game.Screens.Play;
 
 namespace osu.Game.Online.Spectator
@@ -52,6 +53,9 @@ namespace osu.Game.Online.Spectator
         [CanBeNull]
         private IBeatmap currentBeatmap;
 
+        [CanBeNull]
+        private Score currentScore;
+
         [Resolved]
         private IBindable<RulesetInfo> currentRuleset { get; set; }
 
@@ -203,7 +207,7 @@ namespace osu.Game.Online.Spectator
             return Task.CompletedTask;
         }
 
-        public void BeginPlaying(GameplayBeatmap beatmap)
+        public void BeginPlaying(GameplayBeatmap beatmap, Score score)
         {
             if (isPlaying)
                 throw new InvalidOperationException($"Cannot invoke {nameof(BeginPlaying)} when already playing");
@@ -216,6 +220,8 @@ namespace osu.Game.Online.Spectator
             currentState.Mods = currentMods.Value.Select(m => new APIMod(m));
 
             currentBeatmap = beatmap.PlayableBeatmap;
+            currentScore = score;
+
             beginPlaying();
         }
 
@@ -308,7 +314,9 @@ namespace osu.Game.Online.Spectator
 
             pendingFrames.Clear();
 
-            SendFrames(new FrameDataBundle(frames));
+            Debug.Assert(currentScore != null);
+
+            SendFrames(new FrameDataBundle(currentScore.ScoreInfo, frames));
 
             lastSendTime = Time.Current;
         }

osu.Game/Rulesets/UI/ReplayRecorder.cs

@@ -49,7 +49,7 @@ namespace osu.Game.Rulesets.UI
 
             inputManager = GetContainingInputManager();
 
-            spectatorStreaming?.BeginPlaying(gameplayBeatmap);
+            spectatorStreaming?.BeginPlaying(gameplayBeatmap, target);
         }
 
         protected override void Dispose(bool isDisposing)