Add star rating to the beatmap metadata in player loading screen

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapMetadataDisplay.cs

@@ -0,0 +1,151 @@
+// 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;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Utils;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Screens.Menu;
+using osu.Game.Screens.Play;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.SongSelect
+{
+    public class TestSceneBeatmapMetadataDisplay : OsuTestScene
+    {
+        private BeatmapMetadataDisplay display;
+
+        [Resolved]
+        private BeatmapManager manager { get; set; }
+
+        [Cached(typeof(BeatmapDifficultyCache))]
+        private readonly TestBeatmapDifficultyCache testDifficultyCache = new TestBeatmapDifficultyCache();
+
+        [Test]
+        public void TestLocal([Values("Beatmap", "Some long title and stuff")]
+                              string title,
+                              [Values("Trial", "Some1's very hardest difficulty")]
+                              string version)
+        {
+            showMetadataForBeatmap(() => CreateWorkingBeatmap(new Beatmap
+            {
+                BeatmapInfo =
+                {
+                    Metadata = new BeatmapMetadata
+                    {
+                        Title = title,
+                    },
+                    Version = version,
+                    StarDifficulty = RNG.NextDouble(0, 10),
+                }
+            }));
+        }
+
+        [Test]
+        public void TestDelayedStarRating()
+        {
+            AddStep("block calculation", () => testDifficultyCache.BlockCalculation = true);
+
+            showMetadataForBeatmap(() => CreateWorkingBeatmap(new Beatmap
+            {
+                BeatmapInfo =
+                {
+                    Metadata = new BeatmapMetadata
+                    {
+                        Title = "Heavy beatmap",
+                    },
+                    Version = "10k objects",
+                    StarDifficulty = 99.99f,
+                }
+            }));
+
+            AddStep("allow calculation", () => testDifficultyCache.BlockCalculation = false);
+        }
+
+        [Test]
+        public void TestRandomFromDatabase()
+        {
+            showMetadataForBeatmap(() =>
+            {
+                var allBeatmapSets = manager.GetAllUsableBeatmapSets(IncludedDetails.Minimal);
+                if (allBeatmapSets.Count == 0)
+                    return manager.DefaultBeatmap;
+
+                var randomBeatmapSet = allBeatmapSets[RNG.Next(0, allBeatmapSets.Count - 1)];
+                var randomBeatmap = randomBeatmapSet.Beatmaps[RNG.Next(0, randomBeatmapSet.Beatmaps.Count - 1)];
+
+                return manager.GetWorkingBeatmap(randomBeatmap);
+            });
+        }
+
+        private void showMetadataForBeatmap(Func<WorkingBeatmap> getBeatmap)
+        {
+            AddStep("setup display", () =>
+            {
+                var randomMods = Ruleset.Value.CreateInstance().GetAllMods().OrderBy(_ => RNG.Next()).Take(5).ToList();
+
+                OsuLogo logo = new OsuLogo { Scale = new Vector2(0.15f) };
+
+                Remove(testDifficultyCache);
+
+                Children = new Drawable[]
+                {
+                    testDifficultyCache,
+                    display = new BeatmapMetadataDisplay(getBeatmap(), new Bindable<IReadOnlyList<Mod>>(randomMods), logo)
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        Alpha = 0f,
+                    }
+                };
+
+                display.FadeIn(400, Easing.OutQuint);
+            });
+
+            AddWaitStep("wait a bit", 5);
+
+            AddStep("finish loading", () => display.Loading = false);
+        }
+
+        private class TestBeatmapDifficultyCache : BeatmapDifficultyCache
+        {
+            private TaskCompletionSource<bool> calculationBlocker;
+
+            private bool blockCalculation;
+
+            public bool BlockCalculation
+            {
+                get => blockCalculation;
+                set
+                {
+                    if (value == blockCalculation)
+                        return;
+
+                    blockCalculation = value;
+
+                    if (value)
+                        calculationBlocker = new TaskCompletionSource<bool>();
+                    else
+                        calculationBlocker?.SetResult(false);
+                }
+            }
+
+            public override async Task<StarDifficulty> GetDifficultyAsync(BeatmapInfo beatmapInfo, RulesetInfo rulesetInfo = null, IEnumerable<Mod> mods = null, CancellationToken cancellationToken = default)
+            {
+                if (blockCalculation)
+                    await calculationBlocker.Task;
+
+                return await base.GetDifficultyAsync(beatmapInfo, rulesetInfo, mods, cancellationToken);
+            }
+        }
+    }
+}

osu.Game/Beatmaps/BeatmapDifficultyCache.cs

@@ -103,8 +103,8 @@ protected override void LoadComplete()
         /// <param name="mods">The <see cref="Mod"/>s to get the difficulty with.</param>
         /// <param name="cancellationToken">An optional <see cref="CancellationToken"/> which stops computing the star difficulty.</param>
         /// <returns>The <see cref="StarDifficulty"/>.</returns>
-        public Task<StarDifficulty> GetDifficultyAsync([NotNull] BeatmapInfo beatmapInfo, [CanBeNull] RulesetInfo rulesetInfo = null, [CanBeNull] IEnumerable<Mod> mods = null,
-                                                       CancellationToken cancellationToken = default)
+        public virtual Task<StarDifficulty> GetDifficultyAsync([NotNull] BeatmapInfo beatmapInfo, [CanBeNull] RulesetInfo rulesetInfo = null,
+                                                               [CanBeNull] IEnumerable<Mod> mods = null, CancellationToken cancellationToken = default)
         {
             // In the case that the user hasn't given us a ruleset, use the beatmap's default ruleset.
             rulesetInfo ??= beatmapInfo.Ruleset;

osu.Game/Screens/Play/BeatmapMetadataDisplay.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
+using System.Diagnostics;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -14,6 +15,7 @@
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Screens.Play.HUD;
+using osu.Game.Screens.Ranking.Expanded;
 using osuTK;
 
 namespace osu.Game.Screens.Play
@@ -25,7 +27,7 @@ public class BeatmapMetadataDisplay : Container
     {
         private readonly WorkingBeatmap beatmap;
         private readonly Bindable<IReadOnlyList<Mod>> mods;
-        private readonly Drawable facade;
+        private readonly Drawable logoFacade;
         private LoadingSpinner loading;
 
         public IBindable<IReadOnlyList<Mod>> Mods => mods;
@@ -41,19 +43,24 @@ public bool Loading
             }
         }
 
-        public BeatmapMetadataDisplay(WorkingBeatmap beatmap, Bindable<IReadOnlyList<Mod>> mods, Drawable facade)
+        public BeatmapMetadataDisplay(WorkingBeatmap beatmap, Bindable<IReadOnlyList<Mod>> mods, Drawable logoFacade)
         {
             this.beatmap = beatmap;
-            this.facade = facade;
+            this.logoFacade = logoFacade;
 
             this.mods = new Bindable<IReadOnlyList<Mod>>();
             this.mods.BindTo(mods);
         }
 
+        private IBindable<StarDifficulty?> starDifficulty;
+
+        private FillFlowContainer versionFlow;
+        private StarRatingDisplay starRatingDisplay;
+
         [BackgroundDependencyLoader]
-        private void load()
+        private void load(BeatmapDifficultyCache difficultyCache)
         {
-            var metadata = beatmap.BeatmapInfo?.Metadata ?? new BeatmapMetadata();
+            var metadata = beatmap.BeatmapInfo.Metadata;
 
             AutoSizeAxes = Axes.Both;
             Children = new Drawable[]
@@ -66,7 +73,7 @@ private void load()
                     Direction = FillDirection.Vertical,
                     Children = new[]
                     {
-                        facade.With(d =>
+                        logoFacade.With(d =>
                         {
                             d.Anchor = Anchor.TopCentre;
                             d.Origin = Anchor.TopCentre;
@@ -107,16 +114,30 @@ private void load()
                                 loading = new LoadingLayer(true)
                             }
                         },
-                        new OsuSpriteText
+                        versionFlow = new FillFlowContainer
                         {
-                            Text = beatmap?.BeatmapInfo?.Version,
-                            Font = OsuFont.GetFont(size: 26, italics: true),
-                            Origin = Anchor.TopCentre,
+                            AutoSizeAxes = Axes.Both,
                             Anchor = Anchor.TopCentre,
-                            Margin = new MarginPadding
+                            Origin = Anchor.TopCentre,
+                            Direction = FillDirection.Vertical,
+                            Spacing = new Vector2(5f),
+                            Margin = new MarginPadding { Bottom = 40 },
+                            Children = new Drawable[]
                             {
-                                Bottom = 40
-                            },
+                                new OsuSpriteText
+                                {
+                                    Text = beatmap?.BeatmapInfo?.Version,
+                                    Font = OsuFont.GetFont(size: 26, italics: true),
+                                    Anchor = Anchor.TopCentre,
+                                    Origin = Anchor.TopCentre,
+                                },
+                                starRatingDisplay = new StarRatingDisplay(default)
+                                {
+                                    Alpha = 0f,
+                                    Anchor = Anchor.TopCentre,
+                                    Origin = Anchor.TopCentre,
+                                }
+                            }
                         },
                         new GridContainer
                         {
@@ -159,9 +180,38 @@ private void load()
                 }
             };
 
+            starDifficulty = difficultyCache.GetBindableDifficulty(beatmap.BeatmapInfo);
+
             Loading = true;
         }
 
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (starDifficulty.Value != null)
+            {
+                starRatingDisplay.Current.Value = starDifficulty.Value.Value;
+                starRatingDisplay.Show();
+            }
+            else
+            {
+                starRatingDisplay.Hide();
+
+                starDifficulty.ValueChanged += d =>
+                {
+                    Debug.Assert(d.NewValue != null);
+
+                    starRatingDisplay.Current.Value = d.NewValue.Value;
+
+                    versionFlow.AutoSizeDuration = 300;
+                    versionFlow.AutoSizeEasing = Easing.OutQuint;
+
+                    starRatingDisplay.FadeIn(300, Easing.InQuint);
+                };
+            }
+        }
+
         private class MetadataLineLabel : OsuSpriteText
         {
             public MetadataLineLabel(string text)