Merge branch 'master' into velocitychanges

CodeAnalysis/BannedSymbols.txt

@@ -19,3 +19,7 @@ P:System.Threading.Tasks.Task`1.Result;Don't use Task.Result. Use Task.GetResult
 M:System.Threading.ManualResetEventSlim.Wait();Specify a timeout to avoid waiting forever.
 M:System.String.ToLower();string.ToLower() changes behaviour depending on CultureInfo.CurrentCulture. Use string.ToLowerInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture or use LocalisableString.
 M:System.String.ToUpper();string.ToUpper() changes behaviour depending on CultureInfo.CurrentCulture. Use string.ToUpperInvariant() instead. If wanting culture-sensitive behaviour, explicitly provide CultureInfo.CurrentCulture or use LocalisableString.
+M:Humanizer.InflectorExtensions.Pascalize(System.String);Humanizer's .Pascalize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToPascalCase() instead.
+M:Humanizer.InflectorExtensions.Camelize(System.String);Humanizer's .Camelize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToCamelCase() instead.
+M:Humanizer.InflectorExtensions.Underscore(System.String);Humanizer's .Underscore() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToSnakeCase() instead.
+M:Humanizer.InflectorExtensions.Kebaberize(System.String);Humanizer's .Kebaberize() extension method changes behaviour depending on CultureInfo.CurrentCulture. Use StringDehumanizeExtensions.ToKebabCase() instead.

osu.Android.props

@@ -51,8 +51,8 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2022.702.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2022.716.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.707.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.719.0" />
   </ItemGroup>
   <ItemGroup Label="Transitive Dependencies">
     <!-- Realm needs to be directly referenced in all Xamarin projects, as it will not pull in its transitive dependencies otherwise. -->

osu.Android/AndroidJoystickSettings.cs

@@ -0,0 +1,76 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Android.Input;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Localisation;
+using osu.Game.Localisation;
+using osu.Game.Overlays.Settings;
+
+namespace osu.Android
+{
+    public class AndroidJoystickSettings : SettingsSubsection
+    {
+        protected override LocalisableString Header => JoystickSettingsStrings.JoystickGamepad;
+
+        private readonly AndroidJoystickHandler joystickHandler;
+
+        private readonly Bindable<bool> enabled = new BindableBool(true);
+
+        private SettingsSlider<float> deadzoneSlider = null!;
+
+        private Bindable<float> handlerDeadzone = null!;
+
+        private Bindable<float> localDeadzone = null!;
+
+        public AndroidJoystickSettings(AndroidJoystickHandler joystickHandler)
+        {
+            this.joystickHandler = joystickHandler;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            // use local bindable to avoid changing enabled state of game host's bindable.
+            handlerDeadzone = joystickHandler.DeadzoneThreshold.GetBoundCopy();
+            localDeadzone = handlerDeadzone.GetUnboundCopy();
+
+            Children = new Drawable[]
+            {
+                new SettingsCheckbox
+                {
+                    LabelText = CommonStrings.Enabled,
+                    Current = enabled
+                },
+                deadzoneSlider = new SettingsSlider<float>
+                {
+                    LabelText = JoystickSettingsStrings.DeadzoneThreshold,
+                    KeyboardStep = 0.01f,
+                    DisplayAsPercentage = true,
+                    Current = localDeadzone,
+                },
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            enabled.BindTo(joystickHandler.Enabled);
+            enabled.BindValueChanged(e => deadzoneSlider.Current.Disabled = !e.NewValue, true);
+
+            handlerDeadzone.BindValueChanged(val =>
+            {
+                bool disabled = localDeadzone.Disabled;
+
+                localDeadzone.Disabled = false;
+                localDeadzone.Value = val.NewValue;
+                localDeadzone.Disabled = disabled;
+            }, true);
+
+            localDeadzone.BindValueChanged(val => handlerDeadzone.Value = val.NewValue);
+        }
+    }
+}

osu.Android/OsuGameAndroid.cs

@@ -96,6 +96,9 @@ namespace osu.Android
                 case AndroidMouseHandler mh:
                     return new AndroidMouseSettings(mh);
 
+                case AndroidJoystickHandler jh:
+                    return new AndroidJoystickSettings(jh);
+
                 default:
                     return base.CreateSettingsSubsectionFor(handler);
             }

osu.Android/osu.Android.csproj

@@ -26,6 +26,7 @@
     <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="AndroidJoystickSettings.cs" />
     <Compile Include="AndroidMouseSettings.cs" />
     <Compile Include="GameplayScreenRotationLocker.cs" />
     <Compile Include="OsuGameActivity.cs" />

osu.Desktop/OsuGameDesktop.cs

@@ -22,10 +22,12 @@ using osu.Framework.Input.Handlers;
 using osu.Framework.Input.Handlers.Joystick;
 using osu.Framework.Input.Handlers.Mouse;
 using osu.Framework.Input.Handlers.Tablet;
+using osu.Framework.Input.Handlers.Touch;
 using osu.Framework.Threading;
 using osu.Game.IO;
 using osu.Game.IPC;
 using osu.Game.Overlays.Settings;
+using osu.Game.Overlays.Settings.Sections;
 using osu.Game.Overlays.Settings.Sections.Input;
 
 namespace osu.Desktop
@@ -156,6 +158,9 @@ namespace osu.Desktop
                 case JoystickHandler jh:
                     return new JoystickSettings(jh);
 
+                case TouchHandler th:
+                    return new InputSection.HandlerSection(th);
+
                 default:
                     return base.CreateSettingsSubsectionFor(handler);
             }

osu.Desktop/Program.cs

@@ -14,6 +14,7 @@ using osu.Framework.Platform;
 using osu.Game;
 using osu.Game.IPC;
 using osu.Game.Tournament;
+using SDL2;
 using Squirrel;
 
 namespace osu.Desktop
@@ -29,7 +30,27 @@ namespace osu.Desktop
         {
             // run Squirrel first, as the app may exit after these run
             if (OperatingSystem.IsWindows())
+            {
+                var windowsVersion = Environment.OSVersion.Version;
+
+                // While .NET 6 still supports Windows 7 and above, we are limited by realm currently, as they choose to only support 8.1 and higher.
+                // See https://www.mongodb.com/docs/realm/sdk/dotnet/#supported-platforms
+                if (windowsVersion.Major < 6 || (windowsVersion.Major == 6 && windowsVersion.Minor <= 2))
+                {
+                    // If users running in compatibility mode becomes more of a common thing, we may want to provide better guidance or even consider
+                    // disabling it ourselves.
+                    // We could also better detect compatibility mode if required:
+                    // https://stackoverflow.com/questions/10744651/how-i-can-detect-if-my-application-is-running-under-compatibility-mode#comment58183249_10744730
+                    SDL.SDL_ShowSimpleMessageBox(SDL.SDL_MessageBoxFlags.SDL_MESSAGEBOX_ERROR,
+                        "Your operating system is too old to run osu!",
+                        "This version of osu! requires at least Windows 8.1 to run.\n"
+                        + "Please upgrade your operating system or consider using an older version of osu!.\n\n"
+                        + "If you are running a newer version of windows, please check you don't have \"Compatibility mode\" turned on for osu!", IntPtr.Zero);
+                    return;
+                }
+
                 setupSquirrel();
+            }
 
             // Back up the cwd before DesktopGameHost changes it
             string cwd = Environment.CurrentDirectory;

osu.Game.Benchmarks/BenchmarkHitObject.cs

@@ -0,0 +1,166 @@
+// 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 BenchmarkDotNet.Attributes;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Benchmarks
+{
+    public class BenchmarkHitObject : BenchmarkTest
+    {
+        [Params(1, 100, 1000)]
+        public int Count { get; set; }
+
+        [Params(false, true)]
+        public bool WithBindableAccess { get; set; }
+
+        [Benchmark]
+        public HitCircle[] OsuCircle()
+        {
+            var circles = new HitCircle[Count];
+
+            for (int i = 0; i < Count; i++)
+            {
+                circles[i] = new HitCircle();
+
+                if (WithBindableAccess)
+                {
+                    _ = circles[i].PositionBindable;
+                    _ = circles[i].ScaleBindable;
+                    _ = circles[i].ComboIndexBindable;
+                    _ = circles[i].ComboOffsetBindable;
+                    _ = circles[i].StackHeightBindable;
+                    _ = circles[i].LastInComboBindable;
+                    _ = circles[i].ComboIndexWithOffsetsBindable;
+                    _ = circles[i].IndexInCurrentComboBindable;
+                    _ = circles[i].SamplesBindable;
+                    _ = circles[i].StartTimeBindable;
+                }
+                else
+                {
+                    _ = circles[i].Position;
+                    _ = circles[i].Scale;
+                    _ = circles[i].ComboIndex;
+                    _ = circles[i].ComboOffset;
+                    _ = circles[i].StackHeight;
+                    _ = circles[i].LastInCombo;
+                    _ = circles[i].ComboIndexWithOffsets;
+                    _ = circles[i].IndexInCurrentCombo;
+                    _ = circles[i].Samples;
+                    _ = circles[i].StartTime;
+                    _ = circles[i].Position;
+                    _ = circles[i].Scale;
+                    _ = circles[i].ComboIndex;
+                    _ = circles[i].ComboOffset;
+                    _ = circles[i].StackHeight;
+                    _ = circles[i].LastInCombo;
+                    _ = circles[i].ComboIndexWithOffsets;
+                    _ = circles[i].IndexInCurrentCombo;
+                    _ = circles[i].Samples;
+                    _ = circles[i].StartTime;
+                }
+            }
+
+            return circles;
+        }
+
+        [Benchmark]
+        public Hit[] TaikoHit()
+        {
+            var hits = new Hit[Count];
+
+            for (int i = 0; i < Count; i++)
+            {
+                hits[i] = new Hit();
+
+                if (WithBindableAccess)
+                {
+                    _ = hits[i].TypeBindable;
+                    _ = hits[i].IsStrongBindable;
+                    _ = hits[i].SamplesBindable;
+                    _ = hits[i].StartTimeBindable;
+                }
+                else
+                {
+                    _ = hits[i].Type;
+                    _ = hits[i].IsStrong;
+                    _ = hits[i].Samples;
+                    _ = hits[i].StartTime;
+                }
+            }
+
+            return hits;
+        }
+
+        [Benchmark]
+        public Fruit[] CatchFruit()
+        {
+            var fruit = new Fruit[Count];
+
+            for (int i = 0; i < Count; i++)
+            {
+                fruit[i] = new Fruit();
+
+                if (WithBindableAccess)
+                {
+                    _ = fruit[i].OriginalXBindable;
+                    _ = fruit[i].XOffsetBindable;
+                    _ = fruit[i].ScaleBindable;
+                    _ = fruit[i].ComboIndexBindable;
+                    _ = fruit[i].HyperDashBindable;
+                    _ = fruit[i].LastInComboBindable;
+                    _ = fruit[i].ComboIndexWithOffsetsBindable;
+                    _ = fruit[i].IndexInCurrentComboBindable;
+                    _ = fruit[i].IndexInBeatmapBindable;
+                    _ = fruit[i].SamplesBindable;
+                    _ = fruit[i].StartTimeBindable;
+                }
+                else
+                {
+                    _ = fruit[i].OriginalX;
+                    _ = fruit[i].XOffset;
+                    _ = fruit[i].Scale;
+                    _ = fruit[i].ComboIndex;
+                    _ = fruit[i].HyperDash;
+                    _ = fruit[i].LastInCombo;
+                    _ = fruit[i].ComboIndexWithOffsets;
+                    _ = fruit[i].IndexInCurrentCombo;
+                    _ = fruit[i].IndexInBeatmap;
+                    _ = fruit[i].Samples;
+                    _ = fruit[i].StartTime;
+                }
+            }
+
+            return fruit;
+        }
+
+        [Benchmark]
+        public Note[] ManiaNote()
+        {
+            var notes = new Note[Count];
+
+            for (int i = 0; i < Count; i++)
+            {
+                notes[i] = new Note();
+
+                if (WithBindableAccess)
+                {
+                    _ = notes[i].ColumnBindable;
+                    _ = notes[i].SamplesBindable;
+                    _ = notes[i].StartTimeBindable;
+                }
+                else
+                {
+                    _ = notes[i].Column;
+                    _ = notes[i].Samples;
+                    _ = notes[i].StartTime;
+                }
+            }
+
+            return notes;
+        }
+    }
+}

osu.Game.Rulesets.Catch/Objects/CatchHitObject.cs

@@ -19,7 +19,9 @@ namespace osu.Game.Rulesets.Catch.Objects
     {
         public const float OBJECT_RADIUS = 64;
 
-        public readonly Bindable<float> OriginalXBindable = new Bindable<float>();
+        private HitObjectProperty<float> originalX;
+
+        public Bindable<float> OriginalXBindable => originalX.Bindable;
 
         /// <summary>
         /// The horizontal position of the hit object between 0 and <see cref="CatchPlayfield.WIDTH"/>.
@@ -31,18 +33,20 @@ namespace osu.Game.Rulesets.Catch.Objects
         [JsonIgnore]
         public float X
         {
-            set => OriginalXBindable.Value = value;
+            set => originalX.Value = value;
         }
 
-        public readonly Bindable<float> XOffsetBindable = new Bindable<float>();
+        private HitObjectProperty<float> xOffset;
+
+        public Bindable<float> XOffsetBindable => xOffset.Bindable;
 
         /// <summary>
         /// A random offset applied to the horizontal position, set by the beatmap processing.
         /// </summary>
         public float XOffset
         {
-            get => XOffsetBindable.Value;
+            get => xOffset.Value;
-            set => XOffsetBindable.Value = value;
+            set => xOffset.Value = value;
         }
 
         /// <summary>
@@ -54,8 +58,8 @@ namespace osu.Game.Rulesets.Catch.Objects
         /// </remarks>
         public float OriginalX
         {
-            get => OriginalXBindable.Value;
+            get => originalX.Value;
-            set => OriginalXBindable.Value = value;
+            set => originalX.Value = value;
         }
 
         /// <summary>
@@ -69,59 +73,71 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public double TimePreempt { get; set; } = 1000;
 
-        public readonly Bindable<int> IndexInBeatmapBindable = new Bindable<int>();
+        private HitObjectProperty<int> indexInBeatmap;
+
+        public Bindable<int> IndexInBeatmapBindable => indexInBeatmap.Bindable;
 
         public int IndexInBeatmap
         {
-            get => IndexInBeatmapBindable.Value;
+            get => indexInBeatmap.Value;
-            set => IndexInBeatmapBindable.Value = value;
+            set => indexInBeatmap.Value = value;
         }
 
         public virtual bool NewCombo { get; set; }
 
         public int ComboOffset { get; set; }
 
-        public Bindable<int> IndexInCurrentComboBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> indexInCurrentCombo;
+
+        public Bindable<int> IndexInCurrentComboBindable => indexInCurrentCombo.Bindable;
 
         public int IndexInCurrentCombo
         {
-            get => IndexInCurrentComboBindable.Value;
+            get => indexInCurrentCombo.Value;
-            set => IndexInCurrentComboBindable.Value = value;
+            set => indexInCurrentCombo.Value = value;
         }
 
-        public Bindable<int> ComboIndexBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> comboIndex;
+
+        public Bindable<int> ComboIndexBindable => comboIndex.Bindable;
 
         public int ComboIndex
         {
-            get => ComboIndexBindable.Value;
+            get => comboIndex.Value;
-            set => ComboIndexBindable.Value = value;
+            set => comboIndex.Value = value;
         }
 
-        public Bindable<int> ComboIndexWithOffsetsBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> comboIndexWithOffsets;
+
+        public Bindable<int> ComboIndexWithOffsetsBindable => comboIndexWithOffsets.Bindable;
 
         public int ComboIndexWithOffsets
         {
-            get => ComboIndexWithOffsetsBindable.Value;
+            get => comboIndexWithOffsets.Value;
-            set => ComboIndexWithOffsetsBindable.Value = value;
+            set => comboIndexWithOffsets.Value = value;
         }
 
-        public Bindable<bool> LastInComboBindable { get; } = new Bindable<bool>();
+        private HitObjectProperty<bool> lastInCombo;
+
+        public Bindable<bool> LastInComboBindable => lastInCombo.Bindable;
 
         /// <summary>
         /// The next fruit starts a new combo. Used for explodey.
         /// </summary>
         public virtual bool LastInCombo
         {
-            get => LastInComboBindable.Value;
+            get => lastInCombo.Value;
-            set => LastInComboBindable.Value = value;
+            set => lastInCombo.Value = value;
         }
 
-        public readonly Bindable<float> ScaleBindable = new Bindable<float>(1);
+        private HitObjectProperty<float> scale = new HitObjectProperty<float>(1);
+
+        public Bindable<float> ScaleBindable => scale.Bindable;
 
         public float Scale
         {
-            get => ScaleBindable.Value;
+            get => scale.Value;
-            set => ScaleBindable.Value = value;
+            set => scale.Value = value;
         }
 
         /// <summary>

osu.Game.Rulesets.Catch/Objects/PalpableCatchHitObject.cs

@@ -5,6 +5,7 @@
 
 using Newtonsoft.Json;
 using osu.Framework.Bindables;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Skinning;
 using osuTK.Graphics;
@@ -24,12 +25,14 @@ namespace osu.Game.Rulesets.Catch.Objects
         /// </summary>
         public float DistanceToHyperDash { get; set; }
 
-        public readonly Bindable<bool> HyperDashBindable = new Bindable<bool>();
+        private HitObjectProperty<bool> hyperDash;
+
+        public Bindable<bool> HyperDashBindable => hyperDash.Bindable;
 
         /// <summary>
         /// Whether this fruit can initiate a hyperdash.
         /// </summary>
-        public bool HyperDash => HyperDashBindable.Value;
+        public bool HyperDash => hyperDash.Value;
 
         private CatchHitObject hyperDashTarget;
 

osu.Game.Rulesets.Mania/Objects/ManiaHitObject.cs

@@ -13,12 +13,14 @@ namespace osu.Game.Rulesets.Mania.Objects
 {
     public abstract class ManiaHitObject : HitObject, IHasColumn, IHasXPosition
     {
-        public readonly Bindable<int> ColumnBindable = new Bindable<int>();
+        private HitObjectProperty<int> column;
+
+        public Bindable<int> ColumnBindable => column.Bindable;
 
         public virtual int Column
         {
-            get => ColumnBindable.Value;
+            get => column.Value;
-            set => ColumnBindable.Value = value;
+            set => column.Value = value;
         }
 
         protected override HitWindows CreateHitWindows() => new ManiaHitWindows();

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModSingleTap.cs

@@ -0,0 +1,175 @@
+// 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.Collections.Generic;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.Timing;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Replays;
+using osu.Game.Rulesets.Replays;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests.Mods
+{
+    public class TestSceneOsuModSingleTap : OsuModTestScene
+    {
+        [Test]
+        public void TestInputSingular() => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModSingleTap(),
+            PassCondition = () => Player.ScoreProcessor.Combo.Value == 2,
+            Autoplay = false,
+            Beatmap = new Beatmap
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 500,
+                        Position = new Vector2(100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 1000,
+                        Position = new Vector2(200, 100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 1500,
+                        Position = new Vector2(300, 100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 2000,
+                        Position = new Vector2(400, 100),
+                    },
+                },
+            },
+            ReplayFrames = new List<ReplayFrame>
+            {
+                new OsuReplayFrame(500, new Vector2(100), OsuAction.LeftButton),
+                new OsuReplayFrame(501, new Vector2(100)),
+                new OsuReplayFrame(1000, new Vector2(200, 100), OsuAction.LeftButton),
+            }
+        });
+
+        [Test]
+        public void TestInputAlternating() => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModSingleTap(),
+            PassCondition = () => Player.ScoreProcessor.Combo.Value == 0 && Player.ScoreProcessor.HighestCombo.Value == 1,
+            Autoplay = false,
+            Beatmap = new Beatmap
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 500,
+                        Position = new Vector2(100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 1000,
+                        Position = new Vector2(200, 100),
+                    },
+                },
+            },
+            ReplayFrames = new List<ReplayFrame>
+            {
+                new OsuReplayFrame(500, new Vector2(100), OsuAction.LeftButton),
+                new OsuReplayFrame(501, new Vector2(100)),
+                new OsuReplayFrame(1000, new Vector2(200, 100), OsuAction.RightButton),
+                new OsuReplayFrame(1001, new Vector2(200, 100)),
+                new OsuReplayFrame(1500, new Vector2(300, 100), OsuAction.LeftButton),
+                new OsuReplayFrame(1501, new Vector2(300, 100)),
+                new OsuReplayFrame(2000, new Vector2(400, 100), OsuAction.RightButton),
+                new OsuReplayFrame(2001, new Vector2(400, 100)),
+            }
+        });
+
+        /// <summary>
+        /// Ensures singletapping is reset before the first hitobject after intro.
+        /// </summary>
+        [Test]
+        public void TestInputAlternatingAtIntro() => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModSingleTap(),
+            PassCondition = () => Player.ScoreProcessor.Combo.Value == 1,
+            Autoplay = false,
+            Beatmap = new Beatmap
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 1000,
+                        Position = new Vector2(100),
+                    },
+                },
+            },
+            ReplayFrames = new List<ReplayFrame>
+            {
+                // first press during intro.
+                new OsuReplayFrame(500, new Vector2(200), OsuAction.LeftButton),
+                new OsuReplayFrame(501, new Vector2(200)),
+                // press different key at hitobject and ensure it has been hit.
+                new OsuReplayFrame(1000, new Vector2(100), OsuAction.RightButton),
+            }
+        });
+
+        /// <summary>
+        /// Ensures singletapping is reset before the first hitobject after a break.
+        /// </summary>
+        [Test]
+        public void TestInputAlternatingWithBreak() => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModSingleTap(),
+            PassCondition = () => Player.ScoreProcessor.Combo.Value == 0 && Player.ScoreProcessor.HighestCombo.Value == 2,
+            Autoplay = false,
+            Beatmap = new Beatmap
+            {
+                Breaks = new List<BreakPeriod>
+                {
+                    new BreakPeriod(500, 2000),
+                },
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 500,
+                        Position = new Vector2(100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 2500,
+                        Position = new Vector2(500, 100),
+                    },
+                    new HitCircle
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(500, 100),
+                    },
+                }
+            },
+            ReplayFrames = new List<ReplayFrame>
+            {
+                // first press to start singletap lock.
+                new OsuReplayFrame(500, new Vector2(100), OsuAction.LeftButton),
+                new OsuReplayFrame(501, new Vector2(100)),
+                // press different key after break but before hit object.
+                new OsuReplayFrame(2250, new Vector2(300, 100), OsuAction.RightButton),
+                new OsuReplayFrame(2251, new Vector2(300, 100)),
+                // press same key at second hitobject and ensure it has been hit.
+                new OsuReplayFrame(2500, new Vector2(500, 100), OsuAction.LeftButton),
+                new OsuReplayFrame(2501, new Vector2(500, 100)),
+                // press different key at third hitobject and ensure it has been missed.
+                new OsuReplayFrame(3000, new Vector2(500, 100), OsuAction.RightButton),
+                new OsuReplayFrame(3001, new Vector2(500, 100)),
+            }
+        });
+    }
+}

osu.Game.Rulesets.Osu/Mods/InputBlockingMod.cs

@@ -0,0 +1,114 @@
+// 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 osu.Framework.Graphics;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
+using osu.Game.Beatmaps.Timing;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Rulesets.UI;
+using osu.Game.Screens.Play;
+using osu.Game.Utils;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    public abstract class InputBlockingMod : Mod, IApplicableToDrawableRuleset<OsuHitObject>
+    {
+        public override double ScoreMultiplier => 1.0;
+        public override Type[] IncompatibleMods => new[] { typeof(ModAutoplay), typeof(ModRelax), typeof(OsuModCinema) };
+        public override ModType Type => ModType.Conversion;
+
+        private const double flash_duration = 1000;
+
+        private DrawableRuleset<OsuHitObject> ruleset = null!;
+
+        protected OsuAction? LastAcceptedAction { get; private set; }
+
+        /// <summary>
+        /// A tracker for periods where alternate should not be forced (i.e. non-gameplay periods).
+        /// </summary>
+        /// <remarks>
+        /// This is different from <see cref="Player.IsBreakTime"/> in that the periods here end strictly at the first object after the break, rather than the break's end time.
+        /// </remarks>
+        private PeriodTracker nonGameplayPeriods = null!;
+
+        private IFrameStableClock gameplayClock = null!;
+
+        public void ApplyToDrawableRuleset(DrawableRuleset<OsuHitObject> drawableRuleset)
+        {
+            ruleset = drawableRuleset;
+            drawableRuleset.KeyBindingInputManager.Add(new InputInterceptor(this));
+
+            var periods = new List<Period>();
+
+            if (drawableRuleset.Objects.Any())
+            {
+                periods.Add(new Period(int.MinValue, getValidJudgementTime(ruleset.Objects.First()) - 1));
+
+                foreach (BreakPeriod b in drawableRuleset.Beatmap.Breaks)
+                    periods.Add(new Period(b.StartTime, getValidJudgementTime(ruleset.Objects.First(h => h.StartTime >= b.EndTime)) - 1));
+
+                static double getValidJudgementTime(HitObject hitObject) => hitObject.StartTime - hitObject.HitWindows.WindowFor(HitResult.Meh);
+            }
+
+            nonGameplayPeriods = new PeriodTracker(periods);
+
+            gameplayClock = drawableRuleset.FrameStableClock;
+        }
+
+        protected abstract bool CheckValidNewAction(OsuAction action);
+
+        private bool checkCorrectAction(OsuAction action)
+        {
+            if (nonGameplayPeriods.IsInAny(gameplayClock.CurrentTime))
+            {
+                LastAcceptedAction = null;
+                return true;
+            }
+
+            switch (action)
+            {
+                case OsuAction.LeftButton:
+                case OsuAction.RightButton:
+                    break;
+
+                // Any action which is not left or right button should be ignored.
+                default:
+                    return true;
+            }
+
+            if (CheckValidNewAction(action))
+            {
+                LastAcceptedAction = action;
+                return true;
+            }
+
+            ruleset.Cursor.FlashColour(Colour4.Red, flash_duration, Easing.OutQuint);
+            return false;
+        }
+
+        private class InputInterceptor : Component, IKeyBindingHandler<OsuAction>
+        {
+            private readonly InputBlockingMod mod;
+
+            public InputInterceptor(InputBlockingMod mod)
+            {
+                this.mod = mod;
+            }
+
+            public bool OnPressed(KeyBindingPressEvent<OsuAction> e)
+                // if the pressed action is incorrect, block it from reaching gameplay.
+                => !mod.checkCorrectAction(e.Action);
+
+            public void OnReleased(KeyBindingReleaseEvent<OsuAction> e)
+            {
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Mods/OsuModAlternate.cs

@@ -1,119 +1,20 @@
 // 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 disable
-
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
-using osu.Framework.Input.Bindings;
-using osu.Framework.Input.Events;
-using osu.Game.Beatmaps.Timing;
-using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.Objects;
-using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Scoring;
-using osu.Game.Rulesets.UI;
-using osu.Game.Screens.Play;
-using osu.Game.Utils;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public class OsuModAlternate : Mod, IApplicableToDrawableRuleset<OsuHitObject>
+    public class OsuModAlternate : InputBlockingMod
     {
         public override string Name => @"Alternate";
         public override string Acronym => @"AL";
         public override string Description => @"Don't use the same key twice in a row!";
-        public override double ScoreMultiplier => 1.0;
-        public override Type[] IncompatibleMods => new[] { typeof(ModAutoplay), typeof(ModRelax) };
-        public override ModType Type => ModType.Conversion;
         public override IconUsage? Icon => FontAwesome.Solid.Keyboard;
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModSingleTap) }).ToArray();
 
-        private const double flash_duration = 1000;
+        protected override bool CheckValidNewAction(OsuAction action) => LastAcceptedAction != action;
-
-        /// <summary>
-        /// A tracker for periods where alternate should not be forced (i.e. non-gameplay periods).
-        /// </summary>
-        /// <remarks>
-        /// This is different from <see cref="Player.IsBreakTime"/> in that the periods here end strictly at the first object after the break, rather than the break's end time.
-        /// </remarks>
-        private PeriodTracker nonGameplayPeriods;
-
-        private OsuAction? lastActionPressed;
-        private DrawableRuleset<OsuHitObject> ruleset;
-
-        private IFrameStableClock gameplayClock;
-
-        public void ApplyToDrawableRuleset(DrawableRuleset<OsuHitObject> drawableRuleset)
-        {
-            ruleset = drawableRuleset;
-            drawableRuleset.KeyBindingInputManager.Add(new InputInterceptor(this));
-
-            var periods = new List<Period>();
-
-            if (drawableRuleset.Objects.Any())
-            {
-                periods.Add(new Period(int.MinValue, getValidJudgementTime(ruleset.Objects.First()) - 1));
-
-                foreach (BreakPeriod b in drawableRuleset.Beatmap.Breaks)
-                    periods.Add(new Period(b.StartTime, getValidJudgementTime(ruleset.Objects.First(h => h.StartTime >= b.EndTime)) - 1));
-
-                static double getValidJudgementTime(HitObject hitObject) => hitObject.StartTime - hitObject.HitWindows.WindowFor(HitResult.Meh);
-            }
-
-            nonGameplayPeriods = new PeriodTracker(periods);
-
-            gameplayClock = drawableRuleset.FrameStableClock;
-        }
-
-        private bool checkCorrectAction(OsuAction action)
-        {
-            if (nonGameplayPeriods.IsInAny(gameplayClock.CurrentTime))
-            {
-                lastActionPressed = null;
-                return true;
-            }
-
-            switch (action)
-            {
-                case OsuAction.LeftButton:
-                case OsuAction.RightButton:
-                    break;
-
-                // Any action which is not left or right button should be ignored.
-                default:
-                    return true;
-            }
-
-            if (lastActionPressed != action)
-            {
-                // User alternated correctly.
-                lastActionPressed = action;
-                return true;
-            }
-
-            ruleset.Cursor.FlashColour(Colour4.Red, flash_duration, Easing.OutQuint);
-            return false;
-        }
-
-        private class InputInterceptor : Component, IKeyBindingHandler<OsuAction>
-        {
-            private readonly OsuModAlternate mod;
-
-            public InputInterceptor(OsuModAlternate mod)
-            {
-                this.mod = mod;
-            }
-
-            public bool OnPressed(KeyBindingPressEvent<OsuAction> e)
-                // if the pressed action is incorrect, block it from reaching gameplay.
-                => !mod.checkCorrectAction(e.Action);
-
-            public void OnReleased(KeyBindingReleaseEvent<OsuAction> e)
-            {
-            }
-        }
     }
 }

osu.Game.Rulesets.Osu/Mods/OsuModAutoplay.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Rulesets.Osu.Mods
 {
     public class OsuModAutoplay : ModAutoplay
     {
-        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModMagnetised), typeof(OsuModRepel), typeof(OsuModAutopilot), typeof(OsuModSpunOut), typeof(OsuModAlternate) }).ToArray();
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModMagnetised), typeof(OsuModRepel), typeof(OsuModAutopilot), typeof(OsuModSpunOut), typeof(OsuModAlternate), typeof(OsuModSingleTap) }).ToArray();
 
         public override ModReplayData CreateReplayData(IBeatmap beatmap, IReadOnlyList<Mod> mods)
             => new ModReplayData(new OsuAutoGenerator(beatmap, mods).Generate(), new ModCreatedUser { Username = "Autoplay" });

osu.Game.Rulesets.Osu/Mods/OsuModCinema.cs

@@ -15,7 +15,7 @@ namespace osu.Game.Rulesets.Osu.Mods
 {
     public class OsuModCinema : ModCinema<OsuHitObject>
     {
-        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModMagnetised), typeof(OsuModAutopilot), typeof(OsuModSpunOut), typeof(OsuModAlternate) }).ToArray();
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModMagnetised), typeof(OsuModAutopilot), typeof(OsuModSpunOut), typeof(OsuModAlternate), typeof(OsuModSingleTap), typeof(OsuModRepel) }).ToArray();
 
         public override ModReplayData CreateReplayData(IBeatmap beatmap, IReadOnlyList<Mod> mods)
             => new ModReplayData(new OsuAutoGenerator(beatmap, mods).Generate(), new ModCreatedUser { Username = "Autoplay" });

osu.Game.Rulesets.Osu/Mods/OsuModPerfect.cs

@@ -3,11 +3,14 @@
 
 #nullable disable
 
+using System;
+using System.Linq;
 using osu.Game.Rulesets.Mods;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
     public class OsuModPerfect : ModPerfect
     {
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModAutopilot) }).ToArray();
     }
 }

osu.Game.Rulesets.Osu/Mods/OsuModRelax.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Rulesets.Osu.Mods
     public class OsuModRelax : ModRelax, IUpdatableByPlayfield, IApplicableToDrawableRuleset<OsuHitObject>, IApplicableToPlayer
     {
         public override string Description => @"You don't need to click. Give your clicking/tapping fingers a break from the heat of things.";
-        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModAutopilot), typeof(OsuModMagnetised), typeof(OsuModRepel), typeof(OsuModAlternate) }).ToArray();
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModAutopilot), typeof(OsuModMagnetised), typeof(OsuModAlternate), typeof(OsuModSingleTap) }).ToArray();
 
         /// <summary>
         /// How early before a hitobject's start time to trigger a hit.

osu.Game.Rulesets.Osu/Mods/OsuModSingleTap.cs

@@ -0,0 +1,18 @@
+// 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.Linq;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    public class OsuModSingleTap : InputBlockingMod
+    {
+        public override string Name => @"Single Tap";
+        public override string Acronym => @"SG";
+        public override string Description => @"You must only use one key!";
+        public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModAlternate) }).ToArray();
+
+        protected override bool CheckValidNewAction(OsuAction action) => LastAcceptedAction == null || LastAcceptedAction == action;
+    }
+}

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSlider.cs

@@ -319,13 +319,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             const float fade_out_time = 450;
 
-            // intentionally pile on an extra FadeOut to make it happen much faster.
-            Ball.FadeOut(fade_out_time / 4, Easing.Out);
-
             switch (state)
             {
                 case ArmedState.Hit:
-                    Ball.ScaleTo(HitObject.Scale * 1.4f, fade_out_time, Easing.Out);
                     if (SliderBody?.SnakingOut.Value == true)
                         Body.FadeOut(40); // short fade to allow for any body colour to smoothly disappear.
                     break;

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderBall.cs

@@ -23,6 +23,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableSliderBall : CircularContainer, ISliderProgress, IRequireHighFrequencyMousePosition, IHasAccentColour
     {
+        public const float FOLLOW_AREA = 2.4f;
+
         public Func<OsuAction?> GetInitialHitAction;
 
         public Color4 AccentColour
@@ -31,7 +33,6 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             set => ball.Colour = value;
         }
 
-        private Drawable followCircle;
         private Drawable followCircleReceptor;
         private DrawableSlider drawableSlider;
         private Drawable ball;
@@ -47,12 +48,11 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             Children = new[]
             {
-                followCircle = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderFollowCircle), _ => new DefaultFollowCircle())
+                new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderFollowCircle), _ => new DefaultFollowCircle())
                 {
                     Origin = Anchor.Centre,
                     Anchor = Anchor.Centre,
                     RelativeSizeAxes = Axes.Both,
-                    Alpha = 0,
                 },
                 followCircleReceptor = new CircularContainer
                 {
@@ -103,10 +103,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
                 tracking = value;
 
-                followCircleReceptor.Scale = new Vector2(tracking ? 2.4f : 1f);
+                followCircleReceptor.Scale = new Vector2(tracking ? FOLLOW_AREA : 1f);
-
-                followCircle.ScaleTo(tracking ? 2.4f : 1f, 300, Easing.OutQuint);
-                followCircle.FadeTo(tracking ? 1f : 0, 300, Easing.OutQuint);
             }
         }
 

osu.Game.Rulesets.Osu/Objects/OsuHitObject.cs

@@ -7,12 +7,12 @@ using System;
 using System.Linq;
 using osu.Framework.Bindables;
 using osu.Game.Beatmaps;
-using osu.Game.Rulesets.Objects;
-using osuTK;
-using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Scoring;
 using osu.Game.Rulesets.Scoring;
+using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Objects
 {
@@ -36,12 +36,14 @@ namespace osu.Game.Rulesets.Osu.Objects
         public double TimePreempt = 600;
         public double TimeFadeIn = 400;
 
-        public readonly Bindable<Vector2> PositionBindable = new Bindable<Vector2>();
+        private HitObjectProperty<Vector2> position;
+
+        public Bindable<Vector2> PositionBindable => position.Bindable;
 
         public virtual Vector2 Position
         {
-            get => PositionBindable.Value;
+            get => position.Value;
-            set => PositionBindable.Value = value;
+            set => position.Value = value;
         }
 
         public float X => Position.X;
@@ -53,66 +55,80 @@ namespace osu.Game.Rulesets.Osu.Objects
 
         public Vector2 StackedEndPosition => EndPosition + StackOffset;
 
-        public readonly Bindable<int> StackHeightBindable = new Bindable<int>();
+        private HitObjectProperty<int> stackHeight;
+
+        public Bindable<int> StackHeightBindable => stackHeight.Bindable;
 
         public int StackHeight
         {
-            get => StackHeightBindable.Value;
+            get => stackHeight.Value;
-            set => StackHeightBindable.Value = value;
+            set => stackHeight.Value = value;
         }
 
         public virtual Vector2 StackOffset => new Vector2(StackHeight * Scale * -6.4f);
 
         public double Radius => OBJECT_RADIUS * Scale;
 
-        public readonly Bindable<float> ScaleBindable = new BindableFloat(1);
+        private HitObjectProperty<float> scale = new HitObjectProperty<float>(1);
+
+        public Bindable<float> ScaleBindable => scale.Bindable;
 
         public float Scale
         {
-            get => ScaleBindable.Value;
+            get => scale.Value;
-            set => ScaleBindable.Value = value;
+            set => scale.Value = value;
         }
 
         public virtual bool NewCombo { get; set; }
 
-        public readonly Bindable<int> ComboOffsetBindable = new Bindable<int>();
+        private HitObjectProperty<int> comboOffset;
+
+        public Bindable<int> ComboOffsetBindable => comboOffset.Bindable;
 
         public int ComboOffset
         {
-            get => ComboOffsetBindable.Value;
+            get => comboOffset.Value;
-            set => ComboOffsetBindable.Value = value;
+            set => comboOffset.Value = value;
         }
 
-        public Bindable<int> IndexInCurrentComboBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> indexInCurrentCombo;
+
+        public Bindable<int> IndexInCurrentComboBindable => indexInCurrentCombo.Bindable;
 
         public virtual int IndexInCurrentCombo
         {
-            get => IndexInCurrentComboBindable.Value;
+            get => indexInCurrentCombo.Value;
-            set => IndexInCurrentComboBindable.Value = value;
+            set => indexInCurrentCombo.Value = value;
         }
 
-        public Bindable<int> ComboIndexBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> comboIndex;
+
+        public Bindable<int> ComboIndexBindable => comboIndex.Bindable;
 
         public virtual int ComboIndex
         {
-            get => ComboIndexBindable.Value;
+            get => comboIndex.Value;
-            set => ComboIndexBindable.Value = value;
+            set => comboIndex.Value = value;
         }
 
-        public Bindable<int> ComboIndexWithOffsetsBindable { get; } = new Bindable<int>();
+        private HitObjectProperty<int> comboIndexWithOffsets;
+
+        public Bindable<int> ComboIndexWithOffsetsBindable => comboIndexWithOffsets.Bindable;
 
         public int ComboIndexWithOffsets
         {
-            get => ComboIndexWithOffsetsBindable.Value;
+            get => comboIndexWithOffsets.Value;
-            set => ComboIndexWithOffsetsBindable.Value = value;
+            set => comboIndexWithOffsets.Value = value;
         }
 
-        public Bindable<bool> LastInComboBindable { get; } = new Bindable<bool>();
+        private HitObjectProperty<bool> lastInCombo;
+
+        public Bindable<bool> LastInComboBindable => lastInCombo.Bindable;
 
         public bool LastInCombo
         {
-            get => LastInComboBindable.Value;
+            get => lastInCombo.Value;
-            set => LastInComboBindable.Value = value;
+            set => lastInCombo.Value = value;
         }
 
         protected OsuHitObject()

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -172,7 +172,7 @@ namespace osu.Game.Rulesets.Osu
                         new OsuModClassic(),
                         new OsuModRandom(),
                         new OsuModMirror(),
-                        new OsuModAlternate(),
+                        new MultiMod(new OsuModAlternate(), new OsuModSingleTap())
                     };
 
                 case ModType.Automation:

osu.Game.Rulesets.Osu/Skinning/Default/DefaultFollowCircle.cs

@@ -1,19 +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 osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
-    public class DefaultFollowCircle : CompositeDrawable
+    public class DefaultFollowCircle : FollowCircle
     {
         public DefaultFollowCircle()
         {
-            RelativeSizeAxes = Axes.Both;
-
             InternalChild = new CircularContainer
             {
                 RelativeSizeAxes = Axes.Both,
@@ -29,5 +29,22 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
                 }
             };
         }
+
+        protected override void OnTrackingChanged(ValueChangedEvent<bool> tracking)
+        {
+            const float scale_duration = 300f;
+            const float fade_duration = 300f;
+
+            this.ScaleTo(tracking.NewValue ? DrawableSliderBall.FOLLOW_AREA : 1f, scale_duration, Easing.OutQuint)
+                .FadeTo(tracking.NewValue ? 1f : 0, fade_duration, Easing.OutQuint);
+        }
+
+        protected override void OnSliderEnd()
+        {
+            const float fade_duration = 450f;
+
+            // intentionally pile on an extra FadeOut to make it happen much faster
+            this.FadeOut(fade_duration / 4, Easing.Out);
+        }
     }
 }

osu.Game.Rulesets.Osu/Skinning/Default/DefaultSliderBall.cs

@@ -1,8 +1,6 @@
 // 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 disable
-
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -19,13 +17,14 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
     public class DefaultSliderBall : CompositeDrawable
     {
-        private Box box;
+        private Box box = null!;
+
+        [Resolved(canBeNull: true)]
+        private DrawableHitObject? parentObject { get; set; }
 
         [BackgroundDependencyLoader]
-        private void load(DrawableHitObject drawableObject, ISkinSource skin)
+        private void load(ISkinSource skin)
         {
-            var slider = (DrawableSlider)drawableObject;
-
             RelativeSizeAxes = Axes.Both;
 
             float radius = skin.GetConfig<OsuSkinConfiguration, float>(OsuSkinConfiguration.SliderPathRadius)?.Value ?? OsuHitObject.OBJECT_RADIUS;
@@ -51,10 +50,62 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
                 }
             };
 
+            if (parentObject != null)
+            {
+                var slider = (DrawableSlider)parentObject;
                 slider.Tracking.BindValueChanged(trackingChanged, true);
             }
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (parentObject != null)
+            {
+                parentObject.ApplyCustomUpdateState += updateStateTransforms;
+                updateStateTransforms(parentObject, parentObject.State.Value);
+            }
+        }
 
         private void trackingChanged(ValueChangedEvent<bool> tracking) =>
             box.FadeTo(tracking.NewValue ? 0.3f : 0.05f, 200, Easing.OutQuint);
+
+        private void updateStateTransforms(DrawableHitObject drawableObject, ArmedState state)
+        {
+            // Gets called by slider ticks, tails, etc., leading to duplicated
+            // animations which may negatively affect performance
+            if (drawableObject is not DrawableSlider)
+                return;
+
+            const float fade_duration = 450f;
+
+            using (BeginAbsoluteSequence(drawableObject.StateUpdateTime))
+            {
+                this.FadeIn()
+                    .ScaleTo(1f);
+            }
+
+            using (BeginAbsoluteSequence(drawableObject.HitStateUpdateTime))
+            {
+                // intentionally pile on an extra FadeOut to make it happen much faster
+                this.FadeOut(fade_duration / 4, Easing.Out);
+
+                switch (state)
+                {
+                    case ArmedState.Hit:
+                        this.ScaleTo(1.4f, fade_duration, Easing.Out);
+                        break;
+                }
+            }
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (parentObject != null)
+                parentObject.ApplyCustomUpdateState -= updateStateTransforms;
+        }
     }
 }

osu.Game.Rulesets.Osu/Skinning/FollowCircle.cs

@@ -0,0 +1,75 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Skinning
+{
+    public abstract class FollowCircle : CompositeDrawable
+    {
+        [Resolved]
+        protected DrawableHitObject? ParentObject { get; private set; }
+
+        protected FollowCircle()
+        {
+            RelativeSizeAxes = Axes.Both;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            ((DrawableSlider?)ParentObject)?.Tracking.BindValueChanged(OnTrackingChanged, true);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (ParentObject != null)
+            {
+                ParentObject.HitObjectApplied += onHitObjectApplied;
+                onHitObjectApplied(ParentObject);
+
+                ParentObject.ApplyCustomUpdateState += updateStateTransforms;
+                updateStateTransforms(ParentObject, ParentObject.State.Value);
+            }
+        }
+
+        private void onHitObjectApplied(DrawableHitObject drawableObject)
+        {
+            this.ScaleTo(1f)
+                .FadeOut();
+        }
+
+        private void updateStateTransforms(DrawableHitObject drawableObject, ArmedState state)
+        {
+            // Gets called by slider ticks, tails, etc., leading to duplicated
+            // animations which may negatively affect performance
+            if (drawableObject is not DrawableSlider)
+                return;
+
+            using (BeginAbsoluteSequence(drawableObject.HitStateUpdateTime))
+                OnSliderEnd();
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (ParentObject != null)
+            {
+                ParentObject.HitObjectApplied -= onHitObjectApplied;
+                ParentObject.ApplyCustomUpdateState -= updateStateTransforms;
+            }
+        }
+
+        protected abstract void OnTrackingChanged(ValueChangedEvent<bool> tracking);
+
+        protected abstract void OnSliderEnd();
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Legacy/LegacyFollowCircle.cs

@@ -1,12 +1,14 @@
 // 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.Diagnostics;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
 
 namespace osu.Game.Rulesets.Osu.Skinning.Legacy
 {
-    public class LegacyFollowCircle : CompositeDrawable
+    public class LegacyFollowCircle : FollowCircle
     {
         public LegacyFollowCircle(Drawable animationContent)
         {
@@ -18,5 +20,36 @@ namespace osu.Game.Rulesets.Osu.Skinning.Legacy
             RelativeSizeAxes = Axes.Both;
             InternalChild = animationContent;
         }
+
+        protected override void OnTrackingChanged(ValueChangedEvent<bool> tracking)
+        {
+            Debug.Assert(ParentObject != null);
+
+            if (ParentObject.Judged)
+                return;
+
+            double remainingTime = Math.Max(0, ParentObject.HitStateUpdateTime - Time.Current);
+
+            // Note that the scale adjust here is 2 instead of DrawableSliderBall.FOLLOW_AREA to match legacy behaviour.
+            // This means the actual tracking area for gameplay purposes is larger than the sprite (but skins may be accounting for this).
+            if (tracking.NewValue)
+            {
+                // TODO: Follow circle should bounce on each slider tick.
+                this.ScaleTo(0.5f).ScaleTo(2f, Math.Min(180f, remainingTime), Easing.Out)
+                    .FadeTo(0).FadeTo(1f, Math.Min(60f, remainingTime));
+            }
+            else
+            {
+                // TODO: Should animate only at the next slider tick if we want to match stable perfectly.
+                this.ScaleTo(4f, 100)
+                    .FadeTo(0f, 100);
+            }
+        }
+
+        protected override void OnSliderEnd()
+        {
+            this.ScaleTo(1.6f, 200, Easing.Out)
+                .FadeOut(200, Easing.In);
+        }
     }
 }

osu.Game.Rulesets.Taiko/Objects/BarLine.cs

@@ -11,14 +11,16 @@ namespace osu.Game.Rulesets.Taiko.Objects
 {
     public class BarLine : TaikoHitObject, IBarLine
     {
+        private HitObjectProperty<bool> major;
+
+        public Bindable<bool> MajorBindable => major.Bindable;
+
         public bool Major
         {
-            get => MajorBindable.Value;
+            get => major.Value;
-            set => MajorBindable.Value = value;
+            set => major.Value = value;
         }
 
-        public readonly Bindable<bool> MajorBindable = new BindableBool();
-
         public override Judgement CreateJudgement() => new IgnoreJudgement();
     }
 }

osu.Game.Rulesets.Taiko/Objects/Hit.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Game.Audio;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osuTK.Graphics;
 
@@ -14,19 +15,21 @@ namespace osu.Game.Rulesets.Taiko.Objects
 {
     public class Hit : TaikoStrongableHitObject, IHasDisplayColour
     {
-        public readonly Bindable<HitType> TypeBindable = new Bindable<HitType>();
+        private HitObjectProperty<HitType> type;
 
-        public Bindable<Color4> DisplayColour { get; } = new Bindable<Color4>(COLOUR_CENTRE);
+        public Bindable<HitType> TypeBindable => type.Bindable;
 
         /// <summary>
         /// The <see cref="HitType"/> that actuates this <see cref="Hit"/>.
         /// </summary>
         public HitType Type
         {
-            get => TypeBindable.Value;
+            get => type.Value;
-            set => TypeBindable.Value = value;
+            set => type.Value = value;
         }
 
+        public Bindable<Color4> DisplayColour { get; } = new Bindable<Color4>(COLOUR_CENTRE);
+
         public static readonly Color4 COLOUR_CENTRE = Color4Extensions.FromHex(@"bb1177");
         public static readonly Color4 COLOUR_RIM = Color4Extensions.FromHex(@"2299bb");
 

osu.Game.Tests/Extensions/StringDehumanizeExtensionsTest.cs

@@ -0,0 +1,85 @@
+// 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.Globalization;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Game.Extensions;
+
+namespace osu.Game.Tests.Extensions
+{
+    [TestFixture]
+    public class StringDehumanizeExtensionsTest
+    {
+        [Test]
+        [TestCase("single", "Single")]
+        [TestCase("example word", "ExampleWord")]
+        [TestCase("mixed Casing test", "MixedCasingTest")]
+        [TestCase("PascalCase", "PascalCase")]
+        [TestCase("camelCase", "CamelCase")]
+        [TestCase("snake_case", "SnakeCase")]
+        [TestCase("kebab-case", "KebabCase")]
+        [TestCase("i will not break in a different culture", "IWillNotBreakInADifferentCulture", "tr-TR")]
+        public void TestToPascalCase(string input, string expectedOutput, string? culture = null)
+        {
+            using (temporaryCurrentCulture(culture))
+                Assert.That(input.ToPascalCase(), Is.EqualTo(expectedOutput));
+        }
+
+        [Test]
+        [TestCase("single", "single")]
+        [TestCase("example word", "exampleWord")]
+        [TestCase("mixed Casing test", "mixedCasingTest")]
+        [TestCase("PascalCase", "pascalCase")]
+        [TestCase("camelCase", "camelCase")]
+        [TestCase("snake_case", "snakeCase")]
+        [TestCase("kebab-case", "kebabCase")]
+        [TestCase("I will not break in a different culture", "iWillNotBreakInADifferentCulture", "tr-TR")]
+        public void TestToCamelCase(string input, string expectedOutput, string? culture = null)
+        {
+            using (temporaryCurrentCulture(culture))
+                Assert.That(input.ToCamelCase(), Is.EqualTo(expectedOutput));
+        }
+
+        [Test]
+        [TestCase("single", "single")]
+        [TestCase("example word", "example_word")]
+        [TestCase("mixed Casing test", "mixed_casing_test")]
+        [TestCase("PascalCase", "pascal_case")]
+        [TestCase("camelCase", "camel_case")]
+        [TestCase("snake_case", "snake_case")]
+        [TestCase("kebab-case", "kebab_case")]
+        [TestCase("I will not break in a different culture", "i_will_not_break_in_a_different_culture", "tr-TR")]
+        public void TestToSnakeCase(string input, string expectedOutput, string? culture = null)
+        {
+            using (temporaryCurrentCulture(culture))
+                Assert.That(input.ToSnakeCase(), Is.EqualTo(expectedOutput));
+        }
+
+        [Test]
+        [TestCase("single", "single")]
+        [TestCase("example word", "example-word")]
+        [TestCase("mixed Casing test", "mixed-casing-test")]
+        [TestCase("PascalCase", "pascal-case")]
+        [TestCase("camelCase", "camel-case")]
+        [TestCase("snake_case", "snake-case")]
+        [TestCase("kebab-case", "kebab-case")]
+        [TestCase("I will not break in a different culture", "i-will-not-break-in-a-different-culture", "tr-TR")]
+        public void TestToKebabCase(string input, string expectedOutput, string? culture = null)
+        {
+            using (temporaryCurrentCulture(culture))
+                Assert.That(input.ToKebabCase(), Is.EqualTo(expectedOutput));
+        }
+
+        private IDisposable temporaryCurrentCulture(string? cultureName)
+        {
+            var storedCulture = CultureInfo.CurrentCulture;
+
+            if (cultureName != null)
+                CultureInfo.CurrentCulture = new CultureInfo(cultureName);
+
+            return new InvokeOnDisposal(() => CultureInfo.CurrentCulture = storedCulture);
+        }
+    }
+}

osu.Game.Tests/NonVisual/BeatmapSetInfoEqualityTest.cs

@@ -4,9 +4,12 @@
 #nullable disable
 
 using System;
+using System.Linq;
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Extensions;
+using osu.Game.Models;
+using osu.Game.Tests.Resources;
 
 namespace osu.Game.Tests.NonVisual
 {
@@ -23,6 +26,83 @@ namespace osu.Game.Tests.NonVisual
             Assert.IsTrue(ourInfo.MatchesOnlineID(otherInfo));
         }
 
+        [Test]
+        public void TestAudioEqualityNoFile()
+        {
+            var beatmapSetA = TestResources.CreateTestBeatmapSetInfo(1);
+            var beatmapSetB = TestResources.CreateTestBeatmapSetInfo(1);
+
+            Assert.AreNotEqual(beatmapSetA, beatmapSetB);
+            Assert.IsTrue(beatmapSetA.Beatmaps.Single().AudioEquals(beatmapSetB.Beatmaps.Single()));
+        }
+
+        [Test]
+        public void TestAudioEqualitySameHash()
+        {
+            var beatmapSetA = TestResources.CreateTestBeatmapSetInfo(1);
+            var beatmapSetB = TestResources.CreateTestBeatmapSetInfo(1);
+
+            addAudioFile(beatmapSetA, "abc");
+            addAudioFile(beatmapSetB, "abc");
+
+            Assert.AreNotEqual(beatmapSetA, beatmapSetB);
+            Assert.IsTrue(beatmapSetA.Beatmaps.Single().AudioEquals(beatmapSetB.Beatmaps.Single()));
+        }
+
+        [Test]
+        public void TestAudioEqualityDifferentHash()
+        {
+            var beatmapSetA = TestResources.CreateTestBeatmapSetInfo(1);
+            var beatmapSetB = TestResources.CreateTestBeatmapSetInfo(1);
+
+            addAudioFile(beatmapSetA);
+            addAudioFile(beatmapSetB);
+
+            Assert.AreNotEqual(beatmapSetA, beatmapSetB);
+            Assert.IsTrue(beatmapSetA.Beatmaps.Single().AudioEquals(beatmapSetB.Beatmaps.Single()));
+        }
+
+        [Test]
+        public void TestAudioEqualityBeatmapInfoSameHash()
+        {
+            var beatmapSet = TestResources.CreateTestBeatmapSetInfo(2);
+
+            addAudioFile(beatmapSet);
+
+            var beatmap1 = beatmapSet.Beatmaps.First();
+            var beatmap2 = beatmapSet.Beatmaps.Last();
+
+            Assert.AreNotEqual(beatmap1, beatmap2);
+            Assert.IsTrue(beatmap1.AudioEquals(beatmap2));
+        }
+
+        [Test]
+        public void TestAudioEqualityBeatmapInfoDifferentHash()
+        {
+            var beatmapSet = TestResources.CreateTestBeatmapSetInfo(2);
+
+            const string filename1 = "audio1.mp3";
+            const string filename2 = "audio2.mp3";
+
+            addAudioFile(beatmapSet, filename: filename1);
+            addAudioFile(beatmapSet, filename: filename2);
+
+            var beatmap1 = beatmapSet.Beatmaps.First();
+            var beatmap2 = beatmapSet.Beatmaps.Last();
+
+            Assert.AreNotEqual(beatmap1, beatmap2);
+
+            beatmap1.Metadata.AudioFile = filename1;
+            beatmap2.Metadata.AudioFile = filename2;
+
+            Assert.IsFalse(beatmap1.AudioEquals(beatmap2));
+        }
+
+        private static void addAudioFile(BeatmapSetInfo beatmapSetInfo, string hash = null, string filename = null)
+        {
+            beatmapSetInfo.Files.Add(new RealmNamedFileUsage(new RealmFile { Hash = hash ?? Guid.NewGuid().ToString() }, filename ?? "audio.mp3"));
+        }
+
         [Test]
         public void TestDatabasedWithDatabased()
         {

osu.Game.Tests/Resources/TestResources.cs

@@ -134,10 +134,11 @@ namespace osu.Game.Tests.Resources
                         DifficultyName = $"{version} {beatmapId} (length {TimeSpan.FromMilliseconds(length):m\\:ss}, bpm {bpm:0.#})",
                         StarRating = diff,
                         Length = length,
+                        BeatmapSet = beatmapSet,
                         BPM = bpm,
                         Hash = Guid.NewGuid().ToString().ComputeMD5Hash(),
                         Ruleset = rulesetInfo,
-                        Metadata = metadata,
+                        Metadata = metadata.DeepClone(),
                         Difficulty = new BeatmapDifficulty
                         {
                             OverallDifficulty = diff,

osu.Game.Tests/Visual/Editing/TestSceneEditorBeatmapCreation.cs

@@ -6,6 +6,7 @@ using System.IO;
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio.Track;
 using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Screens;
@@ -103,6 +104,8 @@ namespace osu.Game.Tests.Visual.Editing
          */
         public void TestAddAudioTrack()
         {
+            AddAssert("track is virtual", () => Beatmap.Value.Track is TrackVirtual);
+
             AddAssert("switch track to real track", () =>
             {
                 var setup = Editor.ChildrenOfType<SetupScreen>().First();
@@ -131,6 +134,7 @@ namespace osu.Game.Tests.Visual.Editing
                 }
             });
 
+            AddAssert("track is not virtual", () => Beatmap.Value.Track is not TrackVirtual);
             AddAssert("track length changed", () => Beatmap.Value.Track.Length > 60000);
         }
 

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

@@ -0,0 +1,27 @@
+// 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 disable
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    [HeadlessTest]
+    public class TestSceneNoConflictingModAcronyms : TestSceneAllRulesetPlayers
+    {
+        protected override void AddCheckSteps()
+        {
+            AddStep("Check all mod acronyms are unique", () =>
+            {
+                var mods = Ruleset.Value.CreateInstance().AllMods;
+
+                IEnumerable<string> acronyms = mods.Select(m => m.Acronym);
+
+                Assert.That(acronyms, Is.Unique);
+            });
+        }
+    }
+}

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

@@ -1,20 +1,25 @@
 // 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.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
 using osu.Framework.Extensions;
 using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Graphics.Containers;
 using osu.Framework.Platform;
 using osu.Framework.Screens;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
+using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
+using osu.Game.Screens.Play;
 using osu.Game.Screens.Ranking;
 using osu.Game.Tests.Resources;
 
@@ -57,13 +62,46 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         protected override bool HasCustomSteps => true;
 
-        protected override bool AllowFail => false;
+        protected override bool AllowFail => allowFail;
+
+        private bool allowFail;
+
+        [SetUp]
+        public void SetUp()
+        {
+            allowFail = false;
+            customRuleset = null;
+        }
+
+        [Test]
+        public void TestSaveFailedReplay()
+        {
+            AddStep("allow fail", () => allowFail = true);
+
+            CreateTest();
+
+            AddUntilStep("fail screen displayed", () => Player.ChildrenOfType<FailOverlay>().First().State.Value == Visibility.Visible);
+            AddUntilStep("score not in database", () => Realm.Run(r => r.Find<ScoreInfo>(Player.Score.ScoreInfo.ID) == null));
+            AddStep("click save button", () => Player.ChildrenOfType<SaveFailedScoreButton>().First().ChildrenOfType<OsuClickableContainer>().First().TriggerClick());
+            AddUntilStep("score not in database", () => Realm.Run(r => r.Find<ScoreInfo>(Player.Score.ScoreInfo.ID) != null));
+        }
+
+        [Test]
+        public void TestLastPlayedUpdated()
+        {
+            DateTimeOffset? getLastPlayed() => Realm.Run(r => r.Find<BeatmapInfo>(Beatmap.Value.BeatmapInfo.ID)?.LastPlayed);
+
+            AddAssert("last played is null", () => getLastPlayed() == null);
+
+            CreateTest();
+
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
+            AddUntilStep("wait for last played to update", () => getLastPlayed() != null);
+        }
 
         [Test]
         public void TestScoreStoredLocally()
         {
-            AddStep("set no custom ruleset", () => customRuleset = null);
-
             CreateTest();
 
             AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);

osu.Game.Tests/Visual/Multiplayer/TestSceneDrawableRoomPlaylist.cs

@@ -18,6 +18,7 @@ using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Drawables;
 using osu.Game.Database;
 using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Cursor;
 using osu.Game.Models;
 using osu.Game.Online.API;
 using osu.Game.Online.Rooms;
@@ -195,12 +196,15 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestDownloadButtonHiddenWhenBeatmapExists()
         {
-            var beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo;
             Live<BeatmapSetInfo> imported = null;
 
-            Debug.Assert(beatmap.BeatmapSet != null);
+            AddStep("import beatmap", () =>
+            {
+                var beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo;
 
-            AddStep("import beatmap", () => imported = manager.Import(beatmap.BeatmapSet));
+                Debug.Assert(beatmap.BeatmapSet != null);
+                imported = manager.Import(beatmap.BeatmapSet);
+            });
 
             createPlaylistWithBeatmaps(() => imported.PerformRead(s => s.Beatmaps.Detach()));
 
@@ -245,14 +249,10 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestExpiredItems()
         {
-            AddStep("create playlist", () =>
+            createPlaylist(p =>
             {
-                Child = playlist = new TestPlaylist
+                p.Items.Clear();
-                {
+                p.Items.AddRange(new[]
-                    Anchor = Anchor.Centre,
-                    Origin = Anchor.Centre,
-                    Size = new Vector2(500, 300),
-                    Items =
                 {
                     new PlaylistItem(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo)
                     {
@@ -277,8 +277,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
                             new APIMod(new OsuModAutoplay())
                         }
                     }
-                    }
+                });
-                };
             });
 
             AddUntilStep("wait for items to load", () => playlist.ItemMap.Values.All(i => i.IsLoaded));
@@ -321,19 +320,44 @@ namespace osu.Game.Tests.Visual.Multiplayer
             => AddAssert($"delete button {index} {(visible ? "is" : "is not")} visible",
                 () => (playlist.ChildrenOfType<DrawableRoomPlaylistItem.PlaylistRemoveButton>().ElementAt(2 + index * 2).Alpha > 0) == visible);
 
+        private void createPlaylistWithBeatmaps(Func<IEnumerable<IBeatmapInfo>> beatmaps) => createPlaylist(p =>
+        {
+            int index = 0;
+
+            p.Items.Clear();
+
+            foreach (var b in beatmaps())
+            {
+                p.Items.Add(new PlaylistItem(b)
+                {
+                    ID = index++,
+                    OwnerID = 2,
+                    RulesetID = new OsuRuleset().RulesetInfo.OnlineID,
+                    RequiredMods = new[]
+                    {
+                        new APIMod(new OsuModHardRock()),
+                        new APIMod(new OsuModDoubleTime()),
+                        new APIMod(new OsuModAutoplay())
+                    }
+                });
+            }
+        });
+
         private void createPlaylist(Action<TestPlaylist> setupPlaylist = null)
         {
             AddStep("create playlist", () =>
             {
+                Child = new OsuContextMenuContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
                     Child = playlist = new TestPlaylist
                     {
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre,
                         Size = new Vector2(500, 300)
+                    }
                 };
 
-                setupPlaylist?.Invoke(playlist);
-
                 for (int i = 0; i < 20; i++)
                 {
                     playlist.Items.Add(new PlaylistItem(i % 2 == 1
@@ -360,39 +384,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
                         }
                     });
                 }
-            });
 
-            AddUntilStep("wait for items to load", () => playlist.ItemMap.Values.All(i => i.IsLoaded));
+                setupPlaylist?.Invoke(playlist);
-        }
-
-        private void createPlaylistWithBeatmaps(Func<IEnumerable<IBeatmapInfo>> beatmaps)
-        {
-            AddStep("create playlist", () =>
-            {
-                Child = playlist = new TestPlaylist
-                {
-                    Anchor = Anchor.Centre,
-                    Origin = Anchor.Centre,
-                    Size = new Vector2(500, 300)
-                };
-
-                int index = 0;
-
-                foreach (var b in beatmaps())
-                {
-                    playlist.Items.Add(new PlaylistItem(b)
-                    {
-                        ID = index++,
-                        OwnerID = 2,
-                        RulesetID = new OsuRuleset().RulesetInfo.OnlineID,
-                        RequiredMods = new[]
-                        {
-                            new APIMod(new OsuModHardRock()),
-                            new APIMod(new OsuModDoubleTime()),
-                            new APIMod(new OsuModAutoplay())
-                        }
-                    });
-                }
             });
 
             AddUntilStep("wait for items to load", () => playlist.ItemMap.Values.All(i => i.IsLoaded));

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerParticipantsList.cs

@@ -9,6 +9,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Testing;
 using osu.Framework.Utils;
+using osu.Game.Graphics.Cursor;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online;
 using osu.Game.Online.API.Requests.Responses;
@@ -368,12 +369,16 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             ParticipantsList? participantsList = null;
 
-            AddStep("create new list", () => Child = participantsList = new ParticipantsList
+            AddStep("create new list", () => Child = new OsuContextMenuContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Child = participantsList = new ParticipantsList
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
                     RelativeSizeAxes = Axes.Y,
                     Size = new Vector2(380, 0.7f)
+                }
             });
 
             AddUntilStep("wait for list to load", () => participantsList?.IsLoaded == true);

osu.Game.Tests/Visual/Online/TestSceneFriendDisplay.cs

@@ -55,7 +55,7 @@ namespace osu.Game.Tests.Visual.Online
                 Id = 3103765,
                 IsOnline = true,
                 Statistics = new UserStatistics { GlobalRank = 1111 },
-                Country = new Country { FlagName = "JP" },
+                CountryCode = CountryCode.JP,
                 CoverUrl = "https://osu.ppy.sh/images/headers/profile-covers/c6.jpg"
             },
             new APIUser
@@ -64,7 +64,7 @@ namespace osu.Game.Tests.Visual.Online
                 Id = 2,
                 IsOnline = false,
                 Statistics = new UserStatistics { GlobalRank = 2222 },
-                Country = new Country { FlagName = "AU" },
+                CountryCode = CountryCode.AU,
                 CoverUrl = "https://osu.ppy.sh/images/headers/profile-covers/c3.jpg",
                 IsSupporter = true,
                 SupportLevel = 3,
@@ -73,7 +73,7 @@ namespace osu.Game.Tests.Visual.Online
             {
                 Username = "Evast",
                 Id = 8195163,
-                Country = new Country { FlagName = "BY" },
+                CountryCode = CountryCode.BY,
                 CoverUrl = "https://assets.ppy.sh/user-profile-covers/8195163/4a8e2ad5a02a2642b631438cfa6c6bd7e2f9db289be881cb27df18331f64144c.jpeg",
                 IsOnline = false,
                 LastVisit = DateTimeOffset.Now

osu.Game.Tests/Visual/Online/TestSceneRankingsCountryFilter.cs

@@ -23,7 +23,7 @@ namespace osu.Game.Tests.Visual.Online
 
         public TestSceneRankingsCountryFilter()
         {
-            var countryBindable = new Bindable<Country>();
+            var countryBindable = new Bindable<CountryCode>();
 
             AddRange(new Drawable[]
             {
@@ -56,20 +56,12 @@ namespace osu.Game.Tests.Visual.Online
                 }
             });
 
-            var country = new Country
+            const CountryCode country = CountryCode.BY;
-            {
+            const CountryCode unknown_country = CountryCode.CK;
-                FlagName = "BY",
-                FullName = "Belarus"
-            };
-            var unknownCountry = new Country
-            {
-                FlagName = "CK",
-                FullName = "Cook Islands"
-            };
 
             AddStep("Set country", () => countryBindable.Value = country);
-            AddStep("Set null country", () => countryBindable.Value = null);
+            AddStep("Set default country", () => countryBindable.Value = default);
-            AddStep("Set country with no flag", () => countryBindable.Value = unknownCountry);
+            AddStep("Set country with no flag", () => countryBindable.Value = unknown_country);
         }
     }
 }

osu.Game.Tests/Visual/Online/TestSceneRankingsHeader.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Tests.Visual.Online
 
         public TestSceneRankingsHeader()
         {
-            var countryBindable = new Bindable<Country>();
+            var countryBindable = new Bindable<CountryCode>();
             var ruleset = new Bindable<RulesetInfo>();
             var scope = new Bindable<RankingsScope>();
 
@@ -30,21 +30,12 @@ namespace osu.Game.Tests.Visual.Online
                 Ruleset = { BindTarget = ruleset }
             });
 
-            var country = new Country
+            const CountryCode country = CountryCode.BY;
-            {
+            const CountryCode unknown_country = CountryCode.CK;
-                FlagName = "BY",
-                FullName = "Belarus"
-            };
-
-            var unknownCountry = new Country
-            {
-                FlagName = "CK",
-                FullName = "Cook Islands"
-            };
 
             AddStep("Set country", () => countryBindable.Value = country);
             AddStep("Set scope to Score", () => scope.Value = RankingsScope.Score);
-            AddStep("Set country with no flag", () => countryBindable.Value = unknownCountry);
+            AddStep("Set country with no flag", () => countryBindable.Value = unknown_country);
         }
     }
 }

osu.Game.Tests/Visual/Online/TestSceneRankingsOverlay.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Tests.Visual.Online
 
         private TestRankingsOverlay rankingsOverlay;
 
-        private readonly Bindable<Country> countryBindable = new Bindable<Country>();
+        private readonly Bindable<CountryCode> countryBindable = new Bindable<CountryCode>();
         private readonly Bindable<RankingsScope> scope = new Bindable<RankingsScope>();
 
         [SetUp]
@@ -48,15 +48,15 @@ namespace osu.Game.Tests.Visual.Online
         public void TestFlagScopeDependency()
         {
             AddStep("Set scope to Score", () => scope.Value = RankingsScope.Score);
-            AddAssert("Check country is Null", () => countryBindable.Value == null);
+            AddAssert("Check country is default", () => countryBindable.IsDefault);
-            AddStep("Set country", () => countryBindable.Value = us_country);
+            AddStep("Set country", () => countryBindable.Value = CountryCode.US);
             AddAssert("Check scope is Performance", () => scope.Value == RankingsScope.Performance);
         }
 
         [Test]
         public void TestShowCountry()
         {
-            AddStep("Show US", () => rankingsOverlay.ShowCountry(us_country));
+            AddStep("Show US", () => rankingsOverlay.ShowCountry(CountryCode.US));
         }
 
         private void loadRankingsOverlay()
@@ -69,15 +69,9 @@ namespace osu.Game.Tests.Visual.Online
             };
         }
 
-        private static readonly Country us_country = new Country
-        {
-            FlagName = "US",
-            FullName = "United States"
-        };
-
         private class TestRankingsOverlay : RankingsOverlay
         {
-            public new Bindable<Country> Country => base.Country;
+            public new Bindable<CountryCode> Country => base.Country;
         }
     }
 }

osu.Game.Tests/Visual/Online/TestSceneRankingsTables.cs

@@ -57,8 +57,7 @@ namespace osu.Game.Tests.Visual.Online
             {
                 new CountryStatistics
                 {
-                    Country = new Country { FlagName = "US", FullName = "United States" },
+                    Code = CountryCode.US,
-                    FlagName = "US",
                     ActiveUsers = 2_972_623,
                     PlayCount = 3_086_515_743,
                     RankedScore = 449_407_643_332_546,
@@ -66,8 +65,7 @@ namespace osu.Game.Tests.Visual.Online
                 },
                 new CountryStatistics
                 {
-                    Country = new Country { FlagName = "RU", FullName = "Russian Federation" },
+                    Code = CountryCode.RU,
-                    FlagName = "RU",
                     ActiveUsers = 1_609_989,
                     PlayCount = 1_637_052_841,
                     RankedScore = 221_660_827_473_004,
@@ -86,7 +84,7 @@ namespace osu.Game.Tests.Visual.Online
                 User = new APIUser
                 {
                     Username = "first active user",
-                    Country = new Country { FlagName = "JP" },
+                    CountryCode = CountryCode.JP,
                     Active = true,
                 },
                 Accuracy = 0.9972,
@@ -106,7 +104,7 @@ namespace osu.Game.Tests.Visual.Online
                 User = new APIUser
                 {
                     Username = "inactive user",
-                    Country = new Country { FlagName = "AU" },
+                    CountryCode = CountryCode.AU,
                     Active = false,
                 },
                 Accuracy = 0.9831,
@@ -126,7 +124,7 @@ namespace osu.Game.Tests.Visual.Online
                 User = new APIUser
                 {
                     Username = "second active user",
-                    Country = new Country { FlagName = "PL" },
+                    CountryCode = CountryCode.PL,
                     Active = true,
                 },
                 Accuracy = 0.9584,

osu.Game.Tests/Visual/Online/TestSceneScoresContainer.cs

@@ -18,6 +18,7 @@ using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays;
 using osu.Game.Overlays.BeatmapSet.Scores;
 using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Users;
 using osuTK.Graphics;
@@ -146,21 +147,17 @@ namespace osu.Game.Tests.Visual.Online
         {
             var scores = new APIScoresCollection
             {
-                Scores = new List<APIScore>
+                Scores = new List<SoloScoreInfo>
                 {
-                    new APIScore
+                    new SoloScoreInfo
                     {
-                        Date = DateTimeOffset.Now,
+                        EndedAt = DateTimeOffset.Now,
-                        OnlineID = onlineID++,
+                        ID = onlineID++,
                         User = new APIUser
                         {
                             Id = 6602580,
                             Username = @"waaiiru",
-                            Country = new Country
+                            CountryCode = CountryCode.ES,
-                            {
-                                FullName = @"Spain",
-                                FlagName = @"ES",
-                            },
                         },
                         Mods = new[]
                         {
@@ -175,19 +172,15 @@ namespace osu.Game.Tests.Visual.Online
                         TotalScore = 1234567890,
                         Accuracy = 1,
                     },
-                    new APIScore
+                    new SoloScoreInfo
                     {
-                        Date = DateTimeOffset.Now,
+                        EndedAt = DateTimeOffset.Now,
-                        OnlineID = onlineID++,
+                        ID = onlineID++,
                         User = new APIUser
                         {
                             Id = 4608074,
                             Username = @"Skycries",
-                            Country = new Country
+                            CountryCode = CountryCode.BR,
-                            {
-                                FullName = @"Brazil",
-                                FlagName = @"BR",
-                            },
                         },
                         Mods = new[]
                         {
@@ -201,19 +194,15 @@ namespace osu.Game.Tests.Visual.Online
                         TotalScore = 1234789,
                         Accuracy = 0.9997,
                     },
-                    new APIScore
+                    new SoloScoreInfo
                     {
-                        Date = DateTimeOffset.Now,
+                        EndedAt = DateTimeOffset.Now,
-                        OnlineID = onlineID++,
+                        ID = onlineID++,
                         User = new APIUser
                         {
                             Id = 1014222,
                             Username = @"eLy",
-                            Country = new Country
+                            CountryCode = CountryCode.JP,
-                            {
-                                FullName = @"Japan",
-                                FlagName = @"JP",
-                            },
                         },
                         Mods = new[]
                         {
@@ -226,19 +215,15 @@ namespace osu.Game.Tests.Visual.Online
                         TotalScore = 12345678,
                         Accuracy = 0.9854,
                     },
-                    new APIScore
+                    new SoloScoreInfo
                     {
-                        Date = DateTimeOffset.Now,
+                        EndedAt = DateTimeOffset.Now,
-                        OnlineID = onlineID++,
+                        ID = onlineID++,
                         User = new APIUser
                         {
                             Id = 1541390,
                             Username = @"Toukai",
-                            Country = new Country
+                            CountryCode = CountryCode.CA,
-                            {
-                                FullName = @"Canada",
-                                FlagName = @"CA",
-                            },
                         },
                         Mods = new[]
                         {
@@ -250,19 +235,15 @@ namespace osu.Game.Tests.Visual.Online
                         TotalScore = 1234567,
                         Accuracy = 0.8765,
                     },
-                    new APIScore
+                    new SoloScoreInfo
                     {
-                        Date = DateTimeOffset.Now,
+                        EndedAt = DateTimeOffset.Now,
-                        OnlineID = onlineID++,
+                        ID = onlineID++,
                         User = new APIUser
                         {
                             Id = 7151382,
                             Username = @"Mayuri Hana",
-                            Country = new Country
+                            CountryCode = CountryCode.TH,
-                            {
-                                FullName = @"Thailand",
-                                FlagName = @"TH",
-                            },
                         },
                         Rank = ScoreRank.D,
                         PP = 160,
@@ -273,14 +254,18 @@ namespace osu.Game.Tests.Visual.Online
                 }
             };
 
+            const int initial_great_count = 2000;
+
+            int greatCount = initial_great_count;
+
             foreach (var s in scores.Scores)
             {
-                s.Statistics = new Dictionary<string, int>
+                s.Statistics = new Dictionary<HitResult, int>
                 {
-                    { "count_300", RNG.Next(2000) },
+                    { HitResult.Great, greatCount -= 100 },
-                    { "count_100", RNG.Next(2000) },
+                    { HitResult.Ok, RNG.Next(100) },
-                    { "count_50", RNG.Next(2000) },
+                    { HitResult.Meh, RNG.Next(100) },
-                    { "count_miss", RNG.Next(2000) }
+                    { HitResult.Miss, initial_great_count - greatCount }
                 };
             }
 
@@ -289,19 +274,15 @@ namespace osu.Game.Tests.Visual.Online
 
         private APIScoreWithPosition createUserBest() => new APIScoreWithPosition
         {
-            Score = new APIScore
+            Score = new SoloScoreInfo
             {
-                Date = DateTimeOffset.Now,
+                EndedAt = DateTimeOffset.Now,
-                OnlineID = onlineID++,
+                ID = onlineID++,
                 User = new APIUser
                 {
                     Id = 7151382,
                     Username = @"Mayuri Hana",
-                    Country = new Country
+                    CountryCode = CountryCode.TH,
-                    {
-                        FullName = @"Thailand",
-                        FlagName = @"TH",
-                    },
                 },
                 Rank = ScoreRank.D,
                 PP = 160,

osu.Game.Tests/Visual/Online/TestSceneUserPanel.cs

@@ -60,7 +60,7 @@ namespace osu.Game.Tests.Visual.Online
                     {
                         Username = @"flyte",
                         Id = 3103765,
-                        Country = new Country { FlagName = @"JP" },
+                        CountryCode = CountryCode.JP,
                         CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c6.jpg",
                         Status = { Value = new UserStatusOnline() }
                     }) { Width = 300 },
@@ -68,7 +68,7 @@ namespace osu.Game.Tests.Visual.Online
                     {
                         Username = @"peppy",
                         Id = 2,
-                        Country = new Country { FlagName = @"AU" },
+                        CountryCode = CountryCode.AU,
                         CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c3.jpg",
                         IsSupporter = true,
                         SupportLevel = 3,
@@ -77,7 +77,7 @@ namespace osu.Game.Tests.Visual.Online
                     {
                         Username = @"Evast",
                         Id = 8195163,
-                        Country = new Country { FlagName = @"BY" },
+                        CountryCode = CountryCode.BY,
                         CoverUrl = @"https://assets.ppy.sh/user-profile-covers/8195163/4a8e2ad5a02a2642b631438cfa6c6bd7e2f9db289be881cb27df18331f64144c.jpeg",
                         IsOnline = false,
                         LastVisit = DateTimeOffset.Now

osu.Game.Tests/Visual/Online/TestSceneUserProfileOverlay.cs

@@ -24,7 +24,7 @@ namespace osu.Game.Tests.Visual.Online
         {
             Username = @"Somebody",
             Id = 1,
-            Country = new Country { FullName = @"Alien" },
+            CountryCode = CountryCode.Unknown,
             CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c1.jpg",
             JoinDate = DateTimeOffset.Now.AddDays(-1),
             LastVisit = DateTimeOffset.Now,
@@ -82,7 +82,7 @@ namespace osu.Game.Tests.Visual.Online
                 Username = @"peppy",
                 Id = 2,
                 IsSupporter = true,
-                Country = new Country { FullName = @"Australia", FlagName = @"AU" },
+                CountryCode = CountryCode.AU,
                 CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c3.jpg"
             }));
 
@@ -90,7 +90,7 @@ namespace osu.Game.Tests.Visual.Online
             {
                 Username = @"flyte",
                 Id = 3103765,
-                Country = new Country { FullName = @"Japan", FlagName = @"JP" },
+                CountryCode = CountryCode.JP,
                 CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c6.jpg"
             }));
 
@@ -99,7 +99,7 @@ namespace osu.Game.Tests.Visual.Online
                 Username = @"BanchoBot",
                 Id = 3,
                 IsBot = true,
-                Country = new Country { FullName = @"Saint Helena", FlagName = @"SH" },
+                CountryCode = CountryCode.SH,
                 CoverUrl = @"https://osu.ppy.sh/images/headers/profile-covers/c4.jpg"
             }));
 

osu.Game.Tests/Visual/Online/TestSceneUserProfileScores.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Tests.Visual.Online
     {
         public TestSceneUserProfileScores()
         {
-            var firstScore = new APIScore
+            var firstScore = new SoloScoreInfo
             {
                 PP = 1047.21,
                 Rank = ScoreRank.SH,
@@ -34,7 +34,7 @@ namespace osu.Game.Tests.Visual.Online
                     },
                     DifficultyName = "Extreme"
                 },
-                Date = DateTimeOffset.Now,
+                EndedAt = DateTimeOffset.Now,
                 Mods = new[]
                 {
                     new APIMod { Acronym = new OsuModHidden().Acronym },
@@ -44,7 +44,7 @@ namespace osu.Game.Tests.Visual.Online
                 Accuracy = 0.9813
             };
 
-            var secondScore = new APIScore
+            var secondScore = new SoloScoreInfo
             {
                 PP = 134.32,
                 Rank = ScoreRank.A,
@@ -57,7 +57,7 @@ namespace osu.Game.Tests.Visual.Online
                     },
                     DifficultyName = "[4K] Regret"
                 },
-                Date = DateTimeOffset.Now,
+                EndedAt = DateTimeOffset.Now,
                 Mods = new[]
                 {
                     new APIMod { Acronym = new OsuModHardRock().Acronym },
@@ -66,7 +66,7 @@ namespace osu.Game.Tests.Visual.Online
                 Accuracy = 0.998546
             };
 
-            var thirdScore = new APIScore
+            var thirdScore = new SoloScoreInfo
             {
                 PP = 96.83,
                 Rank = ScoreRank.S,
@@ -79,11 +79,11 @@ namespace osu.Game.Tests.Visual.Online
                     },
                     DifficultyName = "Insane"
                 },
-                Date = DateTimeOffset.Now,
+                EndedAt = DateTimeOffset.Now,
                 Accuracy = 0.9726
             };
 
-            var noPPScore = new APIScore
+            var noPPScore = new SoloScoreInfo
             {
                 Rank = ScoreRank.B,
                 Beatmap = new APIBeatmap
@@ -95,7 +95,7 @@ namespace osu.Game.Tests.Visual.Online
                     },
                     DifficultyName = "[4K] Cataclysmic Hypernova"
                 },
-                Date = DateTimeOffset.Now,
+                EndedAt = DateTimeOffset.Now,
                 Accuracy = 0.55879
             };
 

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

@@ -140,11 +140,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 {
                     Id = 6602580,
                     Username = @"waaiiru",
-                    Country = new Country
+                    CountryCode = CountryCode.ES,
-                    {
-                        FullName = @"Spain",
-                        FlagName = @"ES",
-                    },
                 },
             });
         }
@@ -164,12 +160,8 @@ namespace osu.Game.Tests.Visual.SongSelect
                 {
                     Id = 6602580,
                     Username = @"waaiiru",
-                    Country = new Country
+                    CountryCode = CountryCode.ES,
-                    {
+                }
-                        FullName = @"Spain",
-                        FlagName = @"ES",
-                    },
-                },
             });
         }
 
@@ -225,11 +217,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 6602580,
                         Username = @"waaiiru",
-                        Country = new Country
+                        CountryCode = CountryCode.ES,
-                        {
-                            FullName = @"Spain",
-                            FlagName = @"ES",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -246,11 +234,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 4608074,
                         Username = @"Skycries",
-                        Country = new Country
+                        CountryCode = CountryCode.BR,
-                        {
-                            FullName = @"Brazil",
-                            FlagName = @"BR",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -268,11 +252,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 1014222,
                         Username = @"eLy",
-                        Country = new Country
+                        CountryCode = CountryCode.JP,
-                        {
-                            FullName = @"Japan",
-                            FlagName = @"JP",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -290,11 +270,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 1541390,
                         Username = @"Toukai",
-                        Country = new Country
+                        CountryCode = CountryCode.CA,
-                        {
-                            FullName = @"Canada",
-                            FlagName = @"CA",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -312,11 +288,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 2243452,
                         Username = @"Satoruu",
-                        Country = new Country
+                        CountryCode = CountryCode.VE,
-                        {
-                            FullName = @"Venezuela",
-                            FlagName = @"VE",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -334,11 +306,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 2705430,
                         Username = @"Mooha",
-                        Country = new Country
+                        CountryCode = CountryCode.FR,
-                        {
-                            FullName = @"France",
-                            FlagName = @"FR",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -356,11 +324,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 7151382,
                         Username = @"Mayuri Hana",
-                        Country = new Country
+                        CountryCode = CountryCode.TH,
-                        {
-                            FullName = @"Thailand",
-                            FlagName = @"TH",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -378,11 +342,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 2051389,
                         Username = @"FunOrange",
-                        Country = new Country
+                        CountryCode = CountryCode.CA,
-                        {
-                            FullName = @"Canada",
-                            FlagName = @"CA",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -400,11 +360,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 6169483,
                         Username = @"-Hebel-",
-                        Country = new Country
+                        CountryCode = CountryCode.MX,
-                        {
-                            FullName = @"Mexico",
-                            FlagName = @"MX",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -422,11 +378,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 6702666,
                         Username = @"prhtnsm",
-                        Country = new Country
+                        CountryCode = CountryCode.DE,
-                        {
-                            FullName = @"Germany",
-                            FlagName = @"DE",
-                        },
                     },
                 },
             };

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

@@ -69,11 +69,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 6602580,
                         Username = @"waaiiru",
-                        Country = new Country
+                        CountryCode = CountryCode.ES,
-                        {
-                            FullName = @"Spain",
-                            FlagName = @"ES",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -88,11 +84,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 4608074,
                         Username = @"Skycries",
-                        Country = new Country
+                        CountryCode = CountryCode.BR,
-                        {
-                            FullName = @"Brazil",
-                            FlagName = @"BR",
-                        },
                     },
                 },
                 new ScoreInfo
@@ -107,11 +99,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                     {
                         Id = 1541390,
                         Username = @"Toukai",
-                        Country = new Country
+                        CountryCode = CountryCode.CA,
-                        {
-                            FullName = @"Canada",
-                            FlagName = @"CA",
-                        },
                     },
                 }
             };

osu.Game.Tests/Visual/UserInterface/TestSceneBeatmapListingSearchControl.cs

@@ -4,13 +4,13 @@
 #nullable disable
 
 using System.Linq;
-using Humanizer;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
 using osu.Game.Configuration;
+using osu.Game.Extensions;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays;
@@ -77,7 +77,7 @@ namespace osu.Game.Tests.Visual.UserInterface
             };
 
             control.Query.BindValueChanged(q => query.Text = $"Query: {q.NewValue}", true);
-            control.General.BindCollectionChanged((_, _) => general.Text = $"General: {(control.General.Any() ? string.Join('.', control.General.Select(i => i.ToString().Underscore())) : "")}", true);
+            control.General.BindCollectionChanged((_, _) => general.Text = $"General: {(control.General.Any() ? string.Join('.', control.General.Select(i => i.ToString().ToSnakeCase())) : "")}", true);
             control.Ruleset.BindValueChanged(r => ruleset.Text = $"Ruleset: {r.NewValue}", true);
             control.Category.BindValueChanged(c => category.Text = $"Category: {c.NewValue}", true);
             control.Genre.BindValueChanged(g => genre.Text = $"Genre: {g.NewValue}", true);

osu.Game.Tournament/Components/TournamentSpriteTextWithBackground.cs

@@ -12,7 +12,8 @@ namespace osu.Game.Tournament.Components
 {
     public class TournamentSpriteTextWithBackground : CompositeDrawable
     {
-        protected readonly TournamentSpriteText Text;
+        public readonly TournamentSpriteText Text;
+
         protected readonly Box Background;
 
         public TournamentSpriteTextWithBackground(string text = "")

osu.Game.Tournament/Components/TourneyVideo.cs

@@ -22,6 +22,8 @@ namespace osu.Game.Tournament.Components
         private Video video;
         private ManualClock manualClock;
 
+        public bool VideoAvailable => video != null;
+
         public TourneyVideo(string filename, bool drawFallbackGradient = false)
         {
             this.filename = filename;

osu.Game.Tournament/CountryExtensions.cs

@@ -0,0 +1,770 @@
+// 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 osu.Game.Users;
+
+namespace osu.Game.Tournament
+{
+    public static class CountryExtensions
+    {
+        public static string GetAcronym(this CountryCode country)
+        {
+            switch (country)
+            {
+                case CountryCode.BD:
+                    return "BGD";
+
+                case CountryCode.BE:
+                    return "BEL";
+
+                case CountryCode.BF:
+                    return "BFA";
+
+                case CountryCode.BG:
+                    return "BGR";
+
+                case CountryCode.BA:
+                    return "BIH";
+
+                case CountryCode.BB:
+                    return "BRB";
+
+                case CountryCode.WF:
+                    return "WLF";
+
+                case CountryCode.BL:
+                    return "BLM";
+
+                case CountryCode.BM:
+                    return "BMU";
+
+                case CountryCode.BN:
+                    return "BRN";
+
+                case CountryCode.BO:
+                    return "BOL";
+
+                case CountryCode.BH:
+                    return "BHR";
+
+                case CountryCode.BI:
+                    return "BDI";
+
+                case CountryCode.BJ:
+                    return "BEN";
+
+                case CountryCode.BT:
+                    return "BTN";
+
+                case CountryCode.JM:
+                    return "JAM";
+
+                case CountryCode.BV:
+                    return "BVT";
+
+                case CountryCode.BW:
+                    return "BWA";
+
+                case CountryCode.WS:
+                    return "WSM";
+
+                case CountryCode.BQ:
+                    return "BES";
+
+                case CountryCode.BR:
+                    return "BRA";
+
+                case CountryCode.BS:
+                    return "BHS";
+
+                case CountryCode.JE:
+                    return "JEY";
+
+                case CountryCode.BY:
+                    return "BLR";
+
+                case CountryCode.BZ:
+                    return "BLZ";
+
+                case CountryCode.RU:
+                    return "RUS";
+
+                case CountryCode.RW:
+                    return "RWA";
+
+                case CountryCode.RS:
+                    return "SRB";
+
+                case CountryCode.TL:
+                    return "TLS";
+
+                case CountryCode.RE:
+                    return "REU";
+
+                case CountryCode.TM:
+                    return "TKM";
+
+                case CountryCode.TJ:
+                    return "TJK";
+
+                case CountryCode.RO:
+                    return "ROU";
+
+                case CountryCode.TK:
+                    return "TKL";
+
+                case CountryCode.GW:
+                    return "GNB";
+
+                case CountryCode.GU:
+                    return "GUM";
+
+                case CountryCode.GT:
+                    return "GTM";
+
+                case CountryCode.GS:
+                    return "SGS";
+
+                case CountryCode.GR:
+                    return "GRC";
+
+                case CountryCode.GQ:
+                    return "GNQ";
+
+                case CountryCode.GP:
+                    return "GLP";
+
+                case CountryCode.JP:
+                    return "JPN";
+
+                case CountryCode.GY:
+                    return "GUY";
+
+                case CountryCode.GG:
+                    return "GGY";
+
+                case CountryCode.GF:
+                    return "GUF";
+
+                case CountryCode.GE:
+                    return "GEO";
+
+                case CountryCode.GD:
+                    return "GRD";
+
+                case CountryCode.GB:
+                    return "GBR";
+
+                case CountryCode.GA:
+                    return "GAB";
+
+                case CountryCode.SV:
+                    return "SLV";
+
+                case CountryCode.GN:
+                    return "GIN";
+
+                case CountryCode.GM:
+                    return "GMB";
+
+                case CountryCode.GL:
+                    return "GRL";
+
+                case CountryCode.GI:
+                    return "GIB";
+
+                case CountryCode.GH:
+                    return "GHA";
+
+                case CountryCode.OM:
+                    return "OMN";
+
+                case CountryCode.TN:
+                    return "TUN";
+
+                case CountryCode.JO:
+                    return "JOR";
+
+                case CountryCode.HR:
+                    return "HRV";
+
+                case CountryCode.HT:
+                    return "HTI";
+
+                case CountryCode.HU:
+                    return "HUN";
+
+                case CountryCode.HK:
+                    return "HKG";
+
+                case CountryCode.HN:
+                    return "HND";
+
+                case CountryCode.HM:
+                    return "HMD";
+
+                case CountryCode.VE:
+                    return "VEN";
+
+                case CountryCode.PR:
+                    return "PRI";
+
+                case CountryCode.PS:
+                    return "PSE";
+
+                case CountryCode.PW:
+                    return "PLW";
+
+                case CountryCode.PT:
+                    return "PRT";
+
+                case CountryCode.SJ:
+                    return "SJM";
+
+                case CountryCode.PY:
+                    return "PRY";
+
+                case CountryCode.IQ:
+                    return "IRQ";
+
+                case CountryCode.PA:
+                    return "PAN";
+
+                case CountryCode.PF:
+                    return "PYF";
+
+                case CountryCode.PG:
+                    return "PNG";
+
+                case CountryCode.PE:
+                    return "PER";
+
+                case CountryCode.PK:
+                    return "PAK";
+
+                case CountryCode.PH:
+                    return "PHL";
+
+                case CountryCode.PN:
+                    return "PCN";
+
+                case CountryCode.PL:
+                    return "POL";
+
+                case CountryCode.PM:
+                    return "SPM";
+
+                case CountryCode.ZM:
+                    return "ZMB";
+
+                case CountryCode.EH:
+                    return "ESH";
+
+                case CountryCode.EE:
+                    return "EST";
+
+                case CountryCode.EG:
+                    return "EGY";
+
+                case CountryCode.ZA:
+                    return "ZAF";
+
+                case CountryCode.EC:
+                    return "ECU";
+
+                case CountryCode.IT:
+                    return "ITA";
+
+                case CountryCode.VN:
+                    return "VNM";
+
+                case CountryCode.SB:
+                    return "SLB";
+
+                case CountryCode.ET:
+                    return "ETH";
+
+                case CountryCode.SO:
+                    return "SOM";
+
+                case CountryCode.ZW:
+                    return "ZWE";
+
+                case CountryCode.SA:
+                    return "SAU";
+
+                case CountryCode.ES:
+                    return "ESP";
+
+                case CountryCode.ER:
+                    return "ERI";
+
+                case CountryCode.ME:
+                    return "MNE";
+
+                case CountryCode.MD:
+                    return "MDA";
+
+                case CountryCode.MG:
+                    return "MDG";
+
+                case CountryCode.MF:
+                    return "MAF";
+
+                case CountryCode.MA:
+                    return "MAR";
+
+                case CountryCode.MC:
+                    return "MCO";
+
+                case CountryCode.UZ:
+                    return "UZB";
+
+                case CountryCode.MM:
+                    return "MMR";
+
+                case CountryCode.ML:
+                    return "MLI";
+
+                case CountryCode.MO:
+                    return "MAC";
+
+                case CountryCode.MN:
+                    return "MNG";
+
+                case CountryCode.MH:
+                    return "MHL";
+
+                case CountryCode.MK:
+                    return "MKD";
+
+                case CountryCode.MU:
+                    return "MUS";
+
+                case CountryCode.MT:
+                    return "MLT";
+
+                case CountryCode.MW:
+                    return "MWI";
+
+                case CountryCode.MV:
+                    return "MDV";
+
+                case CountryCode.MQ:
+                    return "MTQ";
+
+                case CountryCode.MP:
+                    return "MNP";
+
+                case CountryCode.MS:
+                    return "MSR";
+
+                case CountryCode.MR:
+                    return "MRT";
+
+                case CountryCode.IM:
+                    return "IMN";
+
+                case CountryCode.UG:
+                    return "UGA";
+
+                case CountryCode.TZ:
+                    return "TZA";
+
+                case CountryCode.MY:
+                    return "MYS";
+
+                case CountryCode.MX:
+                    return "MEX";
+
+                case CountryCode.IL:
+                    return "ISR";
+
+                case CountryCode.FR:
+                    return "FRA";
+
+                case CountryCode.IO:
+                    return "IOT";
+
+                case CountryCode.SH:
+                    return "SHN";
+
+                case CountryCode.FI:
+                    return "FIN";
+
+                case CountryCode.FJ:
+                    return "FJI";
+
+                case CountryCode.FK:
+                    return "FLK";
+
+                case CountryCode.FM:
+                    return "FSM";
+
+                case CountryCode.FO:
+                    return "FRO";
+
+                case CountryCode.NI:
+                    return "NIC";
+
+                case CountryCode.NL:
+                    return "NLD";
+
+                case CountryCode.NO:
+                    return "NOR";
+
+                case CountryCode.NA:
+                    return "NAM";
+
+                case CountryCode.VU:
+                    return "VUT";
+
+                case CountryCode.NC:
+                    return "NCL";
+
+                case CountryCode.NE:
+                    return "NER";
+
+                case CountryCode.NF:
+                    return "NFK";
+
+                case CountryCode.NG:
+                    return "NGA";
+
+                case CountryCode.NZ:
+                    return "NZL";
+
+                case CountryCode.NP:
+                    return "NPL";
+
+                case CountryCode.NR:
+                    return "NRU";
+
+                case CountryCode.NU:
+                    return "NIU";
+
+                case CountryCode.CK:
+                    return "COK";
+
+                case CountryCode.XK:
+                    return "XKX";
+
+                case CountryCode.CI:
+                    return "CIV";
+
+                case CountryCode.CH:
+                    return "CHE";
+
+                case CountryCode.CO:
+                    return "COL";
+
+                case CountryCode.CN:
+                    return "CHN";
+
+                case CountryCode.CM:
+                    return "CMR";
+
+                case CountryCode.CL:
+                    return "CHL";
+
+                case CountryCode.CC:
+                    return "CCK";
+
+                case CountryCode.CA:
+                    return "CAN";
+
+                case CountryCode.CG:
+                    return "COG";
+
+                case CountryCode.CF:
+                    return "CAF";
+
+                case CountryCode.CD:
+                    return "COD";
+
+                case CountryCode.CZ:
+                    return "CZE";
+
+                case CountryCode.CY:
+                    return "CYP";
+
+                case CountryCode.CX:
+                    return "CXR";
+
+                case CountryCode.CR:
+                    return "CRI";
+
+                case CountryCode.CW:
+                    return "CUW";
+
+                case CountryCode.CV:
+                    return "CPV";
+
+                case CountryCode.CU:
+                    return "CUB";
+
+                case CountryCode.SZ:
+                    return "SWZ";
+
+                case CountryCode.SY:
+                    return "SYR";
+
+                case CountryCode.SX:
+                    return "SXM";
+
+                case CountryCode.KG:
+                    return "KGZ";
+
+                case CountryCode.KE:
+                    return "KEN";
+
+                case CountryCode.SS:
+                    return "SSD";
+
+                case CountryCode.SR:
+                    return "SUR";
+
+                case CountryCode.KI:
+                    return "KIR";
+
+                case CountryCode.KH:
+                    return "KHM";
+
+                case CountryCode.KN:
+                    return "KNA";
+
+                case CountryCode.KM:
+                    return "COM";
+
+                case CountryCode.ST:
+                    return "STP";
+
+                case CountryCode.SK:
+                    return "SVK";
+
+                case CountryCode.KR:
+                    return "KOR";
+
+                case CountryCode.SI:
+                    return "SVN";
+
+                case CountryCode.KP:
+                    return "PRK";
+
+                case CountryCode.KW:
+                    return "KWT";
+
+                case CountryCode.SN:
+                    return "SEN";
+
+                case CountryCode.SM:
+                    return "SMR";
+
+                case CountryCode.SL:
+                    return "SLE";
+
+                case CountryCode.SC:
+                    return "SYC";
+
+                case CountryCode.KZ:
+                    return "KAZ";
+
+                case CountryCode.KY:
+                    return "CYM";
+
+                case CountryCode.SG:
+                    return "SGP";
+
+                case CountryCode.SE:
+                    return "SWE";
+
+                case CountryCode.SD:
+                    return "SDN";
+
+                case CountryCode.DO:
+                    return "DOM";
+
+                case CountryCode.DM:
+                    return "DMA";
+
+                case CountryCode.DJ:
+                    return "DJI";
+
+                case CountryCode.DK:
+                    return "DNK";
+
+                case CountryCode.VG:
+                    return "VGB";
+
+                case CountryCode.DE:
+                    return "DEU";
+
+                case CountryCode.YE:
+                    return "YEM";
+
+                case CountryCode.DZ:
+                    return "DZA";
+
+                case CountryCode.US:
+                    return "USA";
+
+                case CountryCode.UY:
+                    return "URY";
+
+                case CountryCode.YT:
+                    return "MYT";
+
+                case CountryCode.UM:
+                    return "UMI";
+
+                case CountryCode.LB:
+                    return "LBN";
+
+                case CountryCode.LC:
+                    return "LCA";
+
+                case CountryCode.LA:
+                    return "LAO";
+
+                case CountryCode.TV:
+                    return "TUV";
+
+                case CountryCode.TW:
+                    return "TWN";
+
+                case CountryCode.TT:
+                    return "TTO";
+
+                case CountryCode.TR:
+                    return "TUR";
+
+                case CountryCode.LK:
+                    return "LKA";
+
+                case CountryCode.LI:
+                    return "LIE";
+
+                case CountryCode.LV:
+                    return "LVA";
+
+                case CountryCode.TO:
+                    return "TON";
+
+                case CountryCode.LT:
+                    return "LTU";
+
+                case CountryCode.LU:
+                    return "LUX";
+
+                case CountryCode.LR:
+                    return "LBR";
+
+                case CountryCode.LS:
+                    return "LSO";
+
+                case CountryCode.TH:
+                    return "THA";
+
+                case CountryCode.TF:
+                    return "ATF";
+
+                case CountryCode.TG:
+                    return "TGO";
+
+                case CountryCode.TD:
+                    return "TCD";
+
+                case CountryCode.TC:
+                    return "TCA";
+
+                case CountryCode.LY:
+                    return "LBY";
+
+                case CountryCode.VA:
+                    return "VAT";
+
+                case CountryCode.VC:
+                    return "VCT";
+
+                case CountryCode.AE:
+                    return "ARE";
+
+                case CountryCode.AD:
+                    return "AND";
+
+                case CountryCode.AG:
+                    return "ATG";
+
+                case CountryCode.AF:
+                    return "AFG";
+
+                case CountryCode.AI:
+                    return "AIA";
+
+                case CountryCode.VI:
+                    return "VIR";
+
+                case CountryCode.IS:
+                    return "ISL";
+
+                case CountryCode.IR:
+                    return "IRN";
+
+                case CountryCode.AM:
+                    return "ARM";
+
+                case CountryCode.AL:
+                    return "ALB";
+
+                case CountryCode.AO:
+                    return "AGO";
+
+                case CountryCode.AQ:
+                    return "ATA";
+
+                case CountryCode.AS:
+                    return "ASM";
+
+                case CountryCode.AR:
+                    return "ARG";
+
+                case CountryCode.AU:
+                    return "AUS";
+
+                case CountryCode.AT:
+                    return "AUT";
+
+                case CountryCode.AW:
+                    return "ABW";
+
+                case CountryCode.IN:
+                    return "IND";
+
+                case CountryCode.AX:
+                    return "ALA";
+
+                case CountryCode.AZ:
+                    return "AZE";
+
+                case CountryCode.IE:
+                    return "IRL";
+
+                case CountryCode.ID:
+                    return "IDN";
+
+                case CountryCode.UA:
+                    return "UKR";
+
+                case CountryCode.QA:
+                    return "QAT";
+
+                case CountryCode.MZ:
+                    return "MOZ";
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(country));
+            }
+        }
+    }
+}

osu.Game.Tournament/Models/SeedingBeatmap.cs

@@ -1,8 +1,6 @@
 // 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 disable
-
 using Newtonsoft.Json;
 using osu.Framework.Bindables;
 
@@ -13,7 +11,7 @@ namespace osu.Game.Tournament.Models
         public int ID;
 
         [JsonProperty("BeatmapInfo")]
-        public TournamentBeatmap Beatmap;
+        public TournamentBeatmap? Beatmap;
 
         public long Score;
 

osu.Game.Tournament/Models/TournamentUser.cs

@@ -22,7 +22,8 @@ namespace osu.Game.Tournament.Models
         /// <summary>
         /// The player's country.
         /// </summary>
-        public Country? Country { get; set; }
+        [JsonProperty("country_code")]
+        public CountryCode CountryCode { get; set; }
 
         /// <summary>
         /// The player's global rank, or null if not available.
@@ -40,7 +41,7 @@ namespace osu.Game.Tournament.Models
             {
                 Id = OnlineID,
                 Username = Username,
-                Country = Country,
+                CountryCode = CountryCode,
                 CoverUrl = CoverUrl,
             };
 

osu.Game.Tournament/SaveChangesOverlay.cs

@@ -0,0 +1,101 @@
+// 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.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Online.Multiplayer;
+using osuTK;
+
+namespace osu.Game.Tournament
+{
+    internal class SaveChangesOverlay : CompositeDrawable
+    {
+        [Resolved]
+        private TournamentGame tournamentGame { get; set; } = null!;
+
+        private string? lastSerialisedLadder;
+        private readonly TourneyButton saveChangesButton;
+
+        public SaveChangesOverlay()
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            InternalChild = new Container
+            {
+                Anchor = Anchor.BottomRight,
+                Origin = Anchor.BottomRight,
+                Position = new Vector2(5),
+                CornerRadius = 10,
+                Masking = true,
+                AutoSizeAxes = Axes.Both,
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        Colour = OsuColour.Gray(0.2f),
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                    saveChangesButton = new TourneyButton
+                    {
+                        Text = "Save Changes",
+                        Width = 140,
+                        Height = 50,
+                        Padding = new MarginPadding
+                        {
+                            Top = 10,
+                            Left = 10,
+                        },
+                        Margin = new MarginPadding
+                        {
+                            Right = 10,
+                            Bottom = 10,
+                        },
+                        Action = saveChanges,
+                        // Enabled = { Value = false },
+                    },
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            scheduleNextCheck();
+        }
+
+        private async Task checkForChanges()
+        {
+            string serialisedLadder = await Task.Run(() => tournamentGame.GetSerialisedLadder());
+
+            // If a save hasn't been triggered by the user yet, populate the initial value
+            lastSerialisedLadder ??= serialisedLadder;
+
+            if (lastSerialisedLadder != serialisedLadder && !saveChangesButton.Enabled.Value)
+            {
+                saveChangesButton.Enabled.Value = true;
+                saveChangesButton.Background
+                                 .FadeColour(saveChangesButton.BackgroundColour.Lighten(0.5f), 500, Easing.In).Then()
+                                 .FadeColour(saveChangesButton.BackgroundColour, 500, Easing.Out)
+                                 .Loop();
+            }
+
+            scheduleNextCheck();
+        }
+
+        private void scheduleNextCheck() => Scheduler.AddDelayed(() => checkForChanges().FireAndForget(), 1000);
+
+        private void saveChanges()
+        {
+            tournamentGame.SaveChanges();
+            lastSerialisedLadder = tournamentGame.GetSerialisedLadder();
+
+            saveChangesButton.Enabled.Value = false;
+            saveChangesButton.Background.FadeColour(saveChangesButton.BackgroundColour, 500);
+        }
+    }
+}

osu.Game.Tournament/Screens/Drawings/DrawingsScreen.cs

@@ -12,8 +12,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
-using osu.Framework.Graphics.Sprites;
-using osu.Framework.Graphics.Textures;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
 using osu.Game.Graphics;
@@ -45,7 +43,7 @@ namespace osu.Game.Tournament.Screens.Drawings
         public ITeamList TeamList;
 
         [BackgroundDependencyLoader]
-        private void load(TextureStore textures, Storage storage)
+        private void load(Storage storage)
         {
             RelativeSizeAxes = Axes.Both;
 
@@ -91,11 +89,10 @@ namespace osu.Game.Tournament.Screens.Drawings
                     RelativeSizeAxes = Axes.Both,
                     Children = new Drawable[]
                     {
-                        new Sprite
+                        new TourneyVideo("drawings")
                         {
+                            Loop = true,
                             RelativeSizeAxes = Axes.Both,
-                            FillMode = FillMode.Fill,
-                            Texture = textures.Get(@"Backgrounds/Drawings/background.png")
                         },
                         // Visualiser
                         new VisualiserContainer

osu.Game.Tournament/Screens/Editors/TeamEditorScreen.cs

@@ -3,13 +3,13 @@
 
 #nullable disable
 
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
 using System.Linq;
-using Newtonsoft.Json;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
+using osu.Framework.Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
@@ -25,9 +25,6 @@ namespace osu.Game.Tournament.Screens.Editors
 {
     public class TeamEditorScreen : TournamentEditorScreen<TeamEditorScreen.TeamRow, TournamentTeam>
     {
-        [Resolved]
-        private TournamentGameBase game { get; set; }
-
         protected override BindableList<TournamentTeam> Storage => LadderInfo.Teams;
 
         [BackgroundDependencyLoader]
@@ -45,11 +42,17 @@ namespace osu.Game.Tournament.Screens.Editors
 
         private void addAllCountries()
         {
-            List<TournamentTeam> countries;
+            var countries = new List<TournamentTeam>();
 
-            using (Stream stream = game.Resources.GetStream("Resources/countries.json"))
+            foreach (var country in Enum.GetValues(typeof(CountryCode)).Cast<CountryCode>().Skip(1))
-            using (var sr = new StreamReader(stream))
+            {
-                countries = JsonConvert.DeserializeObject<List<TournamentTeam>>(sr.ReadToEnd());
+                countries.Add(new TournamentTeam
+                {
+                    FlagName = { Value = country.ToString() },
+                    FullName = { Value = country.GetDescription() },
+                    Acronym = { Value = country.GetAcronym() },
+                });
+            }
 
             Debug.Assert(countries != null);
 
@@ -298,10 +301,10 @@ namespace osu.Game.Tournament.Screens.Editors
                         }, true);
                     }
 
-                    private void updatePanel()
+                    private void updatePanel() => Scheduler.AddOnce(() =>
                     {
                         drawableContainer.Child = new UserGridPanel(user.ToAPIUser()) { Width = 300 };
-                    }
+                    });
                 }
             }
         }

osu.Game.Tournament/Screens/Editors/TournamentEditorScreen.cs

@@ -20,7 +20,7 @@ using osuTK;
 
 namespace osu.Game.Tournament.Screens.Editors
 {
-    public abstract class TournamentEditorScreen<TDrawable, TModel> : TournamentScreen, IProvideVideo
+    public abstract class TournamentEditorScreen<TDrawable, TModel> : TournamentScreen
         where TDrawable : Drawable, IModelBacked<TModel>
         where TModel : class, new()
     {

osu.Game.Tournament/Screens/Gameplay/Components/TeamDisplay.cs

@@ -16,6 +16,10 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
     {
         private readonly TeamScore score;
 
+        private readonly TournamentSpriteTextWithBackground teamText;
+
+        private readonly Bindable<string> teamName = new Bindable<string>("???");
+
         private bool showScore;
 
         public bool ShowScore
@@ -93,7 +97,7 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
                                             }
                                         }
                                     },
-                                    new TournamentSpriteTextWithBackground(team?.FullName.Value ?? "???")
+                                    teamText = new TournamentSpriteTextWithBackground
                                     {
                                         Scale = new Vector2(0.5f),
                                         Origin = anchor,
@@ -113,6 +117,11 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
 
             updateDisplay();
             FinishTransforms(true);
+
+            if (Team != null)
+                teamName.BindTo(Team.FullName);
+
+            teamName.BindValueChanged(name => teamText.Text.Text = name.NewValue, true);
         }
 
         private void updateDisplay()

osu.Game.Tournament/Screens/Gameplay/Components/TeamScoreDisplay.cs

@@ -42,6 +42,8 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
             currentMatch.BindTo(ladder.CurrentMatch);
             currentMatch.BindValueChanged(matchChanged);
 
+            currentTeam.BindValueChanged(teamChanged);
+
             updateMatch();
         }
 
@@ -67,7 +69,7 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
 
             // team may change to same team, which means score is not in a good state.
             // thus we handle this manually.
-            teamChanged(currentTeam.Value);
+            currentTeam.TriggerChange();
         }
 
         protected override bool OnMouseDown(MouseDownEvent e)
@@ -88,11 +90,11 @@ namespace osu.Game.Tournament.Screens.Gameplay.Components
             return base.OnMouseDown(e);
         }
 
-        private void teamChanged(TournamentTeam team)
+        private void teamChanged(ValueChangedEvent<TournamentTeam> team)
         {
             InternalChildren = new Drawable[]
             {
-                teamDisplay = new TeamDisplay(team, teamColour, currentTeamScore, currentMatch.Value?.PointsToWin ?? 0),
+                teamDisplay = new TeamDisplay(team.NewValue, teamColour, currentTeamScore, currentMatch.Value?.PointsToWin ?? 0),
             };
         }
     }

osu.Game.Tournament/Screens/Gameplay/GameplayScreen.cs

@@ -21,7 +21,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tournament.Screens.Gameplay
 {
-    public class GameplayScreen : BeatmapInfoScreen, IProvideVideo
+    public class GameplayScreen : BeatmapInfoScreen
     {
         private readonly BindableBool warmup = new BindableBool();
 

osu.Game.Tournament/Screens/IProvideVideo.cs

@@ -1,14 +0,0 @@
-// 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 disable
-
-namespace osu.Game.Tournament.Screens
-{
-    /// <summary>
-    /// Marker interface for a screen which provides its own local video background.
-    /// </summary>
-    public interface IProvideVideo
-    {
-    }
-}

osu.Game.Tournament/Screens/Ladder/Components/LadderEditorSettings.cs

@@ -53,6 +53,9 @@ namespace osu.Game.Tournament.Screens.Ladder.Components
 
             editorInfo.Selected.ValueChanged += selection =>
             {
+                // ensure any ongoing edits are committed out to the *current* selection before changing to a new one.
+                GetContainingInputManager().TriggerFocusContention(null);
+
                 roundDropdown.Current = selection.NewValue?.Round;
                 losersCheckbox.Current = selection.NewValue?.Losers;
                 dateTimeBox.Current = selection.NewValue?.Date;

osu.Game.Tournament/Screens/Ladder/LadderScreen.cs

@@ -19,7 +19,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tournament.Screens.Ladder
 {
-    public class LadderScreen : TournamentScreen, IProvideVideo
+    public class LadderScreen : TournamentScreen
     {
         protected Container<DrawableTournamentMatch> MatchesContainer;
         private Container<Path> paths;

osu.Game.Tournament/Screens/Schedule/ScheduleScreen.cs

@@ -19,7 +19,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tournament.Screens.Schedule
 {
-    public class ScheduleScreen : TournamentScreen // IProvidesVideo
+    public class ScheduleScreen : TournamentScreen
     {
         private readonly Bindable<TournamentMatch> currentMatch = new Bindable<TournamentMatch>();
         private Container mainContainer;

osu.Game.Tournament/Screens/Setup/SetupScreen.cs

@@ -9,6 +9,8 @@ using osu.Framework.Bindables;
 using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
 using osu.Game.Graphics.UserInterfaceV2;
 using osu.Game.Online.API;
 using osu.Game.Overlays;
@@ -19,7 +21,7 @@ using osuTK;
 
 namespace osu.Game.Tournament.Screens.Setup
 {
-    public class SetupScreen : TournamentScreen, IProvideVideo
+    public class SetupScreen : TournamentScreen
     {
         private FillFlowContainer fillFlow;
 
@@ -48,13 +50,21 @@ namespace osu.Game.Tournament.Screens.Setup
         {
             windowSize = frameworkConfig.GetBindable<Size>(FrameworkSetting.WindowedSize);
 
-            InternalChild = fillFlow = new FillFlowContainer
+            InternalChildren = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = OsuColour.Gray(0.2f),
+                },
+                fillFlow = new FillFlowContainer
                 {
                     RelativeSizeAxes = Axes.X,
                     AutoSizeAxes = Axes.Y,
                     Direction = FillDirection.Vertical,
                     Padding = new MarginPadding(10),
                     Spacing = new Vector2(10),
+                }
             };
 
             api.LocalUser.BindValueChanged(_ => Schedule(reload));
@@ -74,7 +84,8 @@ namespace osu.Game.Tournament.Screens.Setup
                     Action = () => sceneManager?.SetScreen(new StablePathSelectScreen()),
                     Value = fileBasedIpc?.IPCStorage?.GetFullPath(string.Empty) ?? "Not found",
                     Failing = fileBasedIpc?.IPCStorage == null,
-                    Description = "The osu!stable installation which is currently being used as a data source. If a source is not found, make sure you have created an empty ipc.txt in your stable cutting-edge installation."
+                    Description =
+                        "The osu!stable installation which is currently being used as a data source. If a source is not found, make sure you have created an empty ipc.txt in your stable cutting-edge installation."
                 },
                 new ActionableInfo
                 {

osu.Game.Tournament/Screens/Showcase/ShowcaseScreen.cs

@@ -14,7 +14,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tournament.Screens.Showcase
 {
-    public class ShowcaseScreen : BeatmapInfoScreen // IProvideVideo
+    public class ShowcaseScreen : BeatmapInfoScreen
     {
         [BackgroundDependencyLoader]
         private void load()

osu.Game.Tournament/Screens/TeamIntro/SeedingScreen.cs

@@ -3,6 +3,7 @@
 
 #nullable disable
 
+using System.Diagnostics;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -19,7 +20,7 @@ using osuTK;
 
 namespace osu.Game.Tournament.Screens.TeamIntro
 {
-    public class SeedingScreen : TournamentMatchScreen, IProvideVideo
+    public class SeedingScreen : TournamentMatchScreen
     {
         private Container mainContainer;
 
@@ -69,7 +70,7 @@ namespace osu.Game.Tournament.Screens.TeamIntro
             currentTeam.BindValueChanged(teamChanged, true);
         }
 
-        private void teamChanged(ValueChangedEvent<TournamentTeam> team)
+        private void teamChanged(ValueChangedEvent<TournamentTeam> team) => Scheduler.AddOnce(() =>
         {
             if (team.NewValue == null)
             {
@@ -78,7 +79,7 @@ namespace osu.Game.Tournament.Screens.TeamIntro
             }
 
             showTeam(team.NewValue);
-        }
+        });
 
         protected override void CurrentMatchChanged(ValueChangedEvent<TournamentMatch> match)
         {
@@ -120,15 +121,23 @@ namespace osu.Game.Tournament.Screens.TeamIntro
                 foreach (var seeding in team.SeedingResults)
                 {
                     fill.Add(new ModRow(seeding.Mod.Value, seeding.Seed.Value));
+
                     foreach (var beatmap in seeding.Beatmaps)
+                    {
+                        if (beatmap.Beatmap == null)
+                            continue;
+
                         fill.Add(new BeatmapScoreRow(beatmap));
                     }
                 }
+            }
 
             private class BeatmapScoreRow : CompositeDrawable
             {
                 public BeatmapScoreRow(SeedingBeatmap beatmap)
                 {
+                    Debug.Assert(beatmap.Beatmap != null);
+
                     RelativeSizeAxes = Axes.X;
                     AutoSizeAxes = Axes.Y;
 
@@ -157,7 +166,8 @@ namespace osu.Game.Tournament.Screens.TeamIntro
                             Children = new Drawable[]
                             {
                                 new TournamentSpriteText { Text = beatmap.Score.ToString("#,0"), Colour = TournamentGame.TEXT_COLOUR, Width = 80 },
-                                new TournamentSpriteText { Text = "#" + beatmap.Seed.Value.ToString("#,0"), Colour = TournamentGame.TEXT_COLOUR, Font = OsuFont.Torus.With(weight: FontWeight.Regular) },
+                                new TournamentSpriteText
+                                    { Text = "#" + beatmap.Seed.Value.ToString("#,0"), Colour = TournamentGame.TEXT_COLOUR, Font = OsuFont.Torus.With(weight: FontWeight.Regular) },
                             }
                         },
                     };

osu.Game.Tournament/Screens/TeamIntro/TeamIntroScreen.cs

@@ -13,7 +13,7 @@ using osuTK;
 
 namespace osu.Game.Tournament.Screens.TeamIntro
 {
-    public class TeamIntroScreen : TournamentMatchScreen, IProvideVideo
+    public class TeamIntroScreen : TournamentMatchScreen
     {
         private Container mainContainer;
 

osu.Game.Tournament/Screens/TeamWin/TeamWinScreen.cs

@@ -14,7 +14,7 @@ using osuTK;
 
 namespace osu.Game.Tournament.Screens.TeamWin
 {
-    public class TeamWinScreen : TournamentMatchScreen, IProvideVideo
+    public class TeamWinScreen : TournamentMatchScreen
     {
         private Container mainContainer;
 
@@ -66,7 +66,7 @@ namespace osu.Game.Tournament.Screens.TeamWin
 
         private bool firstDisplay = true;
 
-        private void update() => Schedule(() =>
+        private void update() => Scheduler.AddOnce(() =>
         {
             var match = CurrentMatch.Value;
 

osu.Game.Tournament/TournamentGame.cs

@@ -11,8 +11,6 @@ using osu.Framework.Configuration;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Colour;
-using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Handlers.Mouse;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
@@ -20,11 +18,11 @@ using osu.Game.Graphics;
 using osu.Game.Graphics.Cursor;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Tournament.Models;
-using osuTK;
 using osuTK.Graphics;
 
 namespace osu.Game.Tournament
 {
+    [Cached]
     public class TournamentGame : TournamentGameBase
     {
         public static ColourInfo GetTeamColour(TeamColour teamColour) => teamColour == TeamColour.Red ? COLOUR_RED : COLOUR_BLUE;
@@ -78,40 +76,9 @@ namespace osu.Game.Tournament
 
                 LoadComponentsAsync(new[]
                 {
-                    new Container
+                    new SaveChangesOverlay
                     {
-                        CornerRadius = 10,
                         Depth = float.MinValue,
-                        Position = new Vector2(5),
-                        Masking = true,
-                        AutoSizeAxes = Axes.Both,
-                        Anchor = Anchor.BottomRight,
-                        Origin = Anchor.BottomRight,
-                        Children = new Drawable[]
-                        {
-                            new Box
-                            {
-                                Colour = OsuColour.Gray(0.2f),
-                                RelativeSizeAxes = Axes.Both,
-                            },
-                            new TourneyButton
-                            {
-                                Text = "Save Changes",
-                                Width = 140,
-                                Height = 50,
-                                Padding = new MarginPadding
-                                {
-                                    Top = 10,
-                                    Left = 10,
-                                },
-                                Margin = new MarginPadding
-                                {
-                                    Right = 10,
-                                    Bottom = 10,
-                                },
-                                Action = SaveChanges,
-                            },
-                        }
                     },
                     heightWarning = new WarningBox("Please make the window wider")
                     {

osu.Game.Tournament/TournamentGameBase.cs

@@ -21,6 +21,7 @@ using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Tournament.IO;
 using osu.Game.Tournament.IPC;
 using osu.Game.Tournament.Models;
+using osu.Game.Users;
 using osuTK.Input;
 
 namespace osu.Game.Tournament
@@ -186,7 +187,9 @@ namespace osu.Game.Tournament
         {
             var playersRequiringPopulation = ladder.Teams
                                                    .SelectMany(t => t.Players)
-                                                   .Where(p => string.IsNullOrEmpty(p.Username) || p.Rank == null).ToList();
+                                                   .Where(p => string.IsNullOrEmpty(p.Username)
+                                                               || p.CountryCode == CountryCode.Unknown
+                                                               || p.Rank == null).ToList();
 
             if (playersRequiringPopulation.Count == 0)
                 return false;
@@ -288,14 +291,14 @@ namespace osu.Game.Tournament
 
                 user.Username = res.Username;
                 user.CoverUrl = res.CoverUrl;
-                user.Country = res.Country;
+                user.CountryCode = res.CountryCode;
                 user.Rank = res.Statistics?.GlobalRank;
 
                 success?.Invoke();
             }
         }
 
-        protected virtual void SaveChanges()
+        public void SaveChanges()
         {
             if (!bracketLoadTaskCompletionSource.Task.IsCompletedSuccessfully)
             {
@@ -311,7 +314,16 @@ namespace osu.Game.Tournament
                                         .ToList();
 
             // Serialise before opening stream for writing, so if there's a failure it will leave the file in the previous state.
-            string serialisedLadder = JsonConvert.SerializeObject(ladder,
+            string serialisedLadder = GetSerialisedLadder();
+
+            using (var stream = storage.CreateFileSafely(BRACKET_FILENAME))
+            using (var sw = new StreamWriter(stream))
+                sw.Write(serialisedLadder);
+        }
+
+        public string GetSerialisedLadder()
+        {
+            return JsonConvert.SerializeObject(ladder,
                 new JsonSerializerSettings
                 {
                     Formatting = Formatting.Indented,
@@ -319,10 +331,6 @@ namespace osu.Game.Tournament
                     DefaultValueHandling = DefaultValueHandling.Ignore,
                     Converters = new JsonConverter[] { new JsonPointConverter() }
                 });
-
-            using (var stream = storage.CreateFileSafely(BRACKET_FILENAME))
-            using (var sw = new StreamWriter(stream))
-                sw.Write(serialisedLadder);
         }
 
         protected override UserInputManager CreateUserInputManager() => new TournamentInputManager();

osu.Game.Tournament/TournamentSceneManager.cs

@@ -10,6 +10,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
+using osu.Framework.Testing;
 using osu.Framework.Threading;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
@@ -186,7 +187,7 @@ namespace osu.Game.Tournament
             var lastScreen = currentScreen;
             currentScreen = target;
 
-            if (currentScreen is IProvideVideo)
+            if (currentScreen.ChildrenOfType<TourneyVideo>().FirstOrDefault()?.VideoAvailable == true)
             {
                 video.FadeOut(200);
 

osu.Game.Tournament/TourneyButton.cs

@@ -3,12 +3,15 @@
 
 #nullable disable
 
+using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Tournament
 {
     public class TourneyButton : OsuButton
     {
+        public new Box Background => base.Background;
+
         public TourneyButton()
             : base(null)
         {

osu.Game/Beatmaps/BeatmapImporter.cs

@@ -80,9 +80,8 @@ namespace osu.Game.Beatmaps
 
             if (beatmapSet.OnlineID > 0)
             {
-                var existingSetWithSameOnlineID = realm.All<BeatmapSetInfo>().SingleOrDefault(b => b.OnlineID == beatmapSet.OnlineID);
+                // OnlineID should really be unique, but to avoid catastrophic failure let's iterate just to be sure.
-
+                foreach (var existingSetWithSameOnlineID in realm.All<BeatmapSetInfo>().Where(b => b.OnlineID == beatmapSet.OnlineID))
-                if (existingSetWithSameOnlineID != null)
                 {
                     existingSetWithSameOnlineID.DeletePending = true;
                     existingSetWithSameOnlineID.OnlineID = -1;
@@ -90,7 +89,7 @@ namespace osu.Game.Beatmaps
                     foreach (var b in existingSetWithSameOnlineID.Beatmaps)
                         b.OnlineID = -1;
 
-                    LogForModel(beatmapSet, $"Found existing beatmap set with same OnlineID ({beatmapSet.OnlineID}). It will be deleted.");
+                    LogForModel(beatmapSet, $"Found existing beatmap set with same OnlineID ({beatmapSet.OnlineID}). It will be disassociated and marked for deletion.");
                 }
             }
         }

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Diagnostics;
 using System.Linq;
 using JetBrains.Annotations;
 using Newtonsoft.Json;
@@ -110,6 +111,11 @@ namespace osu.Game.Beatmaps
 
         public bool SamplesMatchPlaybackRate { get; set; } = true;
 
+        /// <summary>
+        /// The time at which this beatmap was last played by the local user.
+        /// </summary>
+        public DateTimeOffset? LastPlayed { get; set; }
+
         /// <summary>
         /// The ratio of distance travelled per time unit.
         /// Generally used to decouple the spacing between hit objects from the enforced "velocity" of the beatmap (see <see cref="DifficultyControlPoint.SliderVelocity"/>).
@@ -151,14 +157,23 @@ namespace osu.Game.Beatmaps
         public bool AudioEquals(BeatmapInfo? other) => other != null
                                                        && BeatmapSet != null
                                                        && other.BeatmapSet != null
-                                                       && BeatmapSet.Hash == other.BeatmapSet.Hash
+                                                       && compareFiles(this, other, m => m.AudioFile);
-                                                       && Metadata.AudioFile == other.Metadata.AudioFile;
 
         public bool BackgroundEquals(BeatmapInfo? other) => other != null
                                                             && BeatmapSet != null
                                                             && other.BeatmapSet != null
-                                                            && BeatmapSet.Hash == other.BeatmapSet.Hash
+                                                            && compareFiles(this, other, m => m.BackgroundFile);
-                                                            && Metadata.BackgroundFile == other.Metadata.BackgroundFile;
+
+        private static bool compareFiles(BeatmapInfo x, BeatmapInfo y, Func<IBeatmapMetadataInfo, string> getFilename)
+        {
+            Debug.Assert(x.BeatmapSet != null);
+            Debug.Assert(y.BeatmapSet != null);
+
+            string? fileHashX = x.BeatmapSet.Files.FirstOrDefault(f => f.Filename == getFilename(x.Metadata))?.File.Hash;
+            string? fileHashY = y.BeatmapSet.Files.FirstOrDefault(f => f.Filename == getFilename(y.Metadata))?.File.Hash;
+
+            return fileHashX == fileHashY;
+        }
 
         IBeatmapMetadataInfo IBeatmapInfo.Metadata => Metadata;
         IBeatmapSetInfo? IBeatmapInfo.BeatmapSet => BeatmapSet;

osu.Game/Beatmaps/BeatmapStatisticIcon.cs

@@ -3,10 +3,10 @@
 
 #nullable disable
 
-using Humanizer;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Textures;
+using osu.Game.Extensions;
 
 namespace osu.Game.Beatmaps
 {
@@ -25,7 +25,7 @@ namespace osu.Game.Beatmaps
         [BackgroundDependencyLoader]
         private void load(TextureStore textures)
         {
-            Texture = textures.Get($"Icons/BeatmapDetails/{iconType.ToString().Kebaberize()}");
+            Texture = textures.Get($"Icons/BeatmapDetails/{iconType.ToString().ToKebabCase()}");
         }
     }
 

osu.Game/Beatmaps/WorkingBeatmapCache.cs

@@ -168,7 +168,7 @@ namespace osu.Game.Beatmaps
 
                     if (texture == null)
                     {
-                        Logger.Log($"Beatmap background failed to load (file {Metadata.BackgroundFile} not found on disk at expected location {fileStorePath}).", level: LogLevel.Error);
+                        Logger.Log($"Beatmap background failed to load (file {Metadata.BackgroundFile} not found on disk at expected location {fileStorePath}).");
                         return null;
                     }
 

osu.Game/Collections/CollectionToggleMenuItem.cs

@@ -0,0 +1,23 @@
+// 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 osu.Game.Beatmaps;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Collections
+{
+    public class CollectionToggleMenuItem : ToggleMenuItem
+    {
+        public CollectionToggleMenuItem(BeatmapCollection collection, IBeatmapInfo beatmap)
+            : base(collection.Name.Value, MenuItemType.Standard, state =>
+            {
+                if (state)
+                    collection.BeatmapHashes.Add(beatmap.MD5Hash);
+                else
+                    collection.BeatmapHashes.Remove(beatmap.MD5Hash);
+            })
+        {
+            State.Value = collection.BeatmapHashes.Contains(beatmap.MD5Hash);
+        }
+    }
+}

osu.Game/Database/EFToRealmMigrator.cs

@@ -443,7 +443,6 @@ namespace osu.Game.Database
                             TotalScore = score.TotalScore,
                             MaxCombo = score.MaxCombo,
                             Accuracy = score.Accuracy,
-                            HasReplay = ((IScoreInfo)score).HasReplay,
                             Date = score.Date,
                             PP = score.PP,
                             Rank = score.Rank,

osu.Game/Database/RealmAccess.cs

@@ -58,8 +58,11 @@ namespace osu.Game.Database
         /// 12   2021-11-24    Add Status to RealmBeatmapSet.
         /// 13   2022-01-13    Final migration of beatmaps and scores to realm (multiple new storage fields).
         /// 14   2022-03-01    Added BeatmapUserSettings to BeatmapInfo.
+        /// 15   2022-07-13    Added LastPlayed to BeatmapInfo.
+        /// 16   2022-07-15    Removed HasReplay from ScoreInfo.
+        /// 17   2022-07-16    Added CountryCode to RealmUser.
         /// </summary>
-        private const int schema_version = 14;
+        private const int schema_version = 17;
 
         /// <summary>
         /// Lock object which is held during <see cref="BlockAllOperations"/> sections, blocking realm retrieval during blocking periods.

osu.Game/Extensions/DrawableExtensions.cs

@@ -1,7 +1,6 @@
 // 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 Humanizer;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -67,7 +66,7 @@ namespace osu.Game.Extensions
 
                 foreach (var (_, property) in component.GetSettingsSourceProperties())
                 {
-                    if (!info.Settings.TryGetValue(property.Name.Underscore(), out object settingValue))
+                    if (!info.Settings.TryGetValue(property.Name.ToSnakeCase(), out object settingValue))
                         continue;
 
                     skinnable.CopyAdjustedSetting((IBindable)property.GetValue(component), settingValue);

osu.Game/Extensions/StringDehumanizeExtensions.cs

@@ -0,0 +1,94 @@
+// 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.
+
+// Based on code from the Humanizer library (https://github.com/Humanizr/Humanizer/blob/606e958cb83afc9be5b36716ac40d4daa9fa73a7/src/Humanizer/InflectorExtensions.cs)
+//
+// Humanizer is licenced under the MIT License (MIT)
+//
+// Copyright (c) .NET Foundation and Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System.Text.RegularExpressions;
+
+namespace osu.Game.Extensions
+{
+    /// <summary>
+    /// Class with extension methods used to turn human-readable strings to casing conventions frequently used in code.
+    /// Often used for communicating with other systems (web API, spectator server).
+    /// All of the operations in this class are intentionally culture-invariant.
+    /// </summary>
+    public static class StringDehumanizeExtensions
+    {
+        /// <summary>
+        /// Converts the string to "Pascal case" (also known as "upper camel case").
+        /// </summary>
+        /// <example>
+        /// <code>
+        /// "this is a test string".ToPascalCase() == "ThisIsATestString"
+        /// </code>
+        /// </example>
+        public static string ToPascalCase(this string input)
+        {
+            return Regex.Replace(input, "(?:^|_|-| +)(.)", match => match.Groups[1].Value.ToUpperInvariant());
+        }
+
+        /// <summary>
+        /// Converts the string to (lower) "camel case".
+        /// </summary>
+        /// <example>
+        /// <code>
+        /// "this is a test string".ToCamelCase() == "thisIsATestString"
+        /// </code>
+        /// </example>
+        public static string ToCamelCase(this string input)
+        {
+            string word = input.ToPascalCase();
+            return word.Length > 0 ? word.Substring(0, 1).ToLowerInvariant() + word.Substring(1) : word;
+        }
+
+        /// <summary>
+        /// Converts the string to "snake case".
+        /// </summary>
+        /// <example>
+        /// <code>
+        /// "this is a test string".ToSnakeCase() == "this_is_a_test_string"
+        /// </code>
+        /// </example>
+        public static string ToSnakeCase(this string input)
+        {
+            return Regex.Replace(
+                Regex.Replace(
+                    Regex.Replace(input, @"([\p{Lu}]+)([\p{Lu}][\p{Ll}])", "$1_$2"), @"([\p{Ll}\d])([\p{Lu}])", "$1_$2"), @"[-\s]", "_").ToLowerInvariant();
+        }
+
+        /// <summary>
+        /// Converts the string to "kebab case".
+        /// </summary>
+        /// <example>
+        /// <code>
+        /// "this is a test string".ToKebabCase() == "this-is-a-test-string"
+        /// </code>
+        /// </example>
+        public static string ToKebabCase(this string input)
+        {
+            return ToSnakeCase(input).Replace('_', '-');
+        }
+    }
+}

osu.Game/IO/OsuStorage.cs

@@ -94,6 +94,8 @@ namespace osu.Game.IO
             error = OsuStorageError.None;
             Storage lastStorage = UnderlyingStorage;
 
+            Logger.Log($"Attempting to use custom storage location {CustomStoragePath}");
+
             try
             {
                 Storage userStorage = host.GetStorage(CustomStoragePath);
@@ -102,6 +104,7 @@ namespace osu.Game.IO
                     error = OsuStorageError.AccessibleButEmpty;
 
                 ChangeTargetStorage(userStorage);
+                Logger.Log($"Storage successfully changed to {CustomStoragePath}.");
             }
             catch
             {
@@ -109,6 +112,9 @@ namespace osu.Game.IO
                 ChangeTargetStorage(lastStorage);
             }
 
+            if (error != OsuStorageError.None)
+                Logger.Log($"Custom storage location could not be used ({error}).");
+
             return error == OsuStorageError.None;
         }
 

osu.Game/IO/Serialization/SnakeCaseKeyContractResolver.cs

@@ -3,8 +3,8 @@
 
 #nullable disable
 
-using Humanizer;
 using Newtonsoft.Json.Serialization;
+using osu.Game.Extensions;
 
 namespace osu.Game.IO.Serialization
 {
@@ -12,7 +12,7 @@ namespace osu.Game.IO.Serialization
     {
         protected override string ResolvePropertyName(string propertyName)
         {
-            return propertyName.Underscore();
+            return propertyName.ToSnakeCase();
         }
     }
 }

osu.Game/Localisation/Language.cs

@@ -2,9 +2,11 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.ComponentModel;
+using JetBrains.Annotations;
 
 namespace osu.Game.Localisation
 {
+    [UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
     public enum Language
     {
         [Description(@"English")]

osu.Game/Models/RealmUser.cs

@@ -1,8 +1,6 @@
 // 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 disable
-
 using System;
 using osu.Game.Database;
 using osu.Game.Users;
@@ -17,6 +15,16 @@ namespace osu.Game.Models
 
         public string Username { get; set; } = string.Empty;
 
+        [Ignored]
+        public CountryCode CountryCode
+        {
+            get => Enum.TryParse(CountryString, out CountryCode country) ? country : CountryCode.Unknown;
+            set => CountryString = value.ToString();
+        }
+
+        [MapTo(nameof(CountryCode))]
+        public string CountryString { get; set; } = default(CountryCode).ToString();
+
         public bool IsBot => false;
 
         public bool Equals(RealmUser other)

osu.Game/Online/API/APIAccess.cs

@@ -38,7 +38,7 @@ namespace osu.Game.Online.API
 
         public string WebsiteRootUrl { get; }
 
-        public int APIVersion => 20220217; // We may want to pull this from the game version eventually.
+        public int APIVersion => 20220705; // We may want to pull this from the game version eventually.
 
         public Exception LastLoginError { get; private set; }
 
@@ -163,7 +163,13 @@ namespace osu.Game.Online.API
 
                         userReq.Failure += ex =>
                         {
-                            if (ex is WebException webException && webException.Message == @"Unauthorized")
+                            if (ex is APIException)
+                            {
+                                LastLoginError = ex;
+                                log.Add("Login failed on local user retrieval!");
+                                Logout();
+                            }
+                            else if (ex is WebException webException && webException.Message == @"Unauthorized")
                             {
                                 log.Add(@"Login no longer valid");
                                 Logout();

osu.Game/Online/API/APIMod.cs

@@ -5,13 +5,14 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
-using Humanizer;
 using MessagePack;
 using Newtonsoft.Json;
 using osu.Framework.Bindables;
 using osu.Framework.Logging;
 using osu.Game.Configuration;
+using osu.Game.Extensions;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 
@@ -44,11 +45,11 @@ namespace osu.Game.Online.API
                 var bindable = (IBindable)property.GetValue(mod);
 
                 if (!bindable.IsDefault)
-                    Settings.Add(property.Name.Underscore(), bindable.GetUnderlyingSettingValue());
+                    Settings.Add(property.Name.ToSnakeCase(), bindable.GetUnderlyingSettingValue());
             }
         }
 
-        public Mod ToMod(Ruleset ruleset)
+        public Mod ToMod([NotNull] Ruleset ruleset)
         {
             Mod resultMod = ruleset.CreateModFromAcronym(Acronym);
 
@@ -62,11 +63,18 @@ namespace osu.Game.Online.API
             {
                 foreach (var (_, property) in resultMod.GetSettingsSourceProperties())
                 {
-                    if (!Settings.TryGetValue(property.Name.Underscore(), out object settingValue))
+                    if (!Settings.TryGetValue(property.Name.ToSnakeCase(), out object settingValue))
                         continue;
 
+                    try
+                    {
                         resultMod.CopyAdjustedSetting((IBindable)property.GetValue(resultMod), settingValue);
                     }
+                    catch (Exception ex)
+                    {
+                        Logger.Log($"Failed to copy mod setting value '{settingValue ?? "null"}' to \"{property.Name}\": {ex.Message}");
+                    }
+                }
             }
 
             return resultMod;

osu.Game/Online/API/Requests/GetCommentsRequest.cs

@@ -4,7 +4,7 @@
 #nullable disable
 
 using osu.Framework.IO.Network;
-using Humanizer;
+using osu.Game.Extensions;
 using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays.Comments;
 
@@ -32,7 +32,7 @@ namespace osu.Game.Online.API.Requests
             var req = base.CreateWebRequest();
 
             req.AddParameter("commentable_id", commentableId.ToString());
-            req.AddParameter("commentable_type", type.ToString().Underscore().ToLowerInvariant());
+            req.AddParameter("commentable_type", type.ToString().ToSnakeCase().ToLowerInvariant());
             req.AddParameter("page", page.ToString());
             req.AddParameter("sort", sort.ToString().ToLowerInvariant());
 

osu.Game/Online/API/Requests/GetScoresRequest.cs

@@ -35,7 +35,7 @@ namespace osu.Game.Online.API.Requests
             this.mods = mods ?? Array.Empty<IMod>();
         }
 
-        protected override string Target => $@"beatmaps/{beatmapInfo.OnlineID}/scores{createQueryParameters()}";
+        protected override string Target => $@"beatmaps/{beatmapInfo.OnlineID}/solo-scores{createQueryParameters()}";
 
         private string createQueryParameters()
         {

osu.Game/Online/API/Requests/GetUserBeatmapsRequest.cs

@@ -3,8 +3,8 @@
 
 #nullable disable
 
-using Humanizer;
 using System.Collections.Generic;
+using osu.Game.Extensions;
 using osu.Game.Online.API.Requests.Responses;
 
 namespace osu.Game.Online.API.Requests
@@ -22,7 +22,7 @@ namespace osu.Game.Online.API.Requests
             this.type = type;
         }
 
-        protected override string Target => $@"users/{userId}/beatmapsets/{type.ToString().Underscore()}";
+        protected override string Target => $@"users/{userId}/beatmapsets/{type.ToString().ToSnakeCase()}";
     }
 
     public enum BeatmapSetType

osu.Game/Online/API/Requests/GetUserRankingsRequest.cs

@@ -5,6 +5,7 @@
 
 using osu.Framework.IO.Network;
 using osu.Game.Rulesets;
+using osu.Game.Users;
 
 namespace osu.Game.Online.API.Requests
 {
@@ -12,21 +13,21 @@ namespace osu.Game.Online.API.Requests
     {
         public readonly UserRankingsType Type;
 
-        private readonly string country;
+        private readonly CountryCode countryCode;
 
-        public GetUserRankingsRequest(RulesetInfo ruleset, UserRankingsType type = UserRankingsType.Performance, int page = 1, string country = null)
+        public GetUserRankingsRequest(RulesetInfo ruleset, UserRankingsType type = UserRankingsType.Performance, int page = 1, CountryCode countryCode = CountryCode.Unknown)
             : base(ruleset, page)
         {
             Type = type;
-            this.country = country;
+            this.countryCode = countryCode;
         }
 
         protected override WebRequest CreateWebRequest()
         {
             var req = base.CreateWebRequest();
 
-            if (country != null)
+            if (countryCode != CountryCode.Unknown)
-                req.AddParameter("country", country);
+                req.AddParameter("country", countryCode.ToString());
 
             return req;
         }

osu.Game/Online/API/Requests/GetUserScoresRequest.cs

@@ -10,7 +10,7 @@ using osu.Game.Rulesets;
 
 namespace osu.Game.Online.API.Requests
 {
-    public class GetUserScoresRequest : PaginatedAPIRequest<List<APIScore>>
+    public class GetUserScoresRequest : PaginatedAPIRequest<List<SoloScoreInfo>>
     {
         private readonly long userId;
         private readonly ScoreType type;

osu.Game/Online/API/Requests/Responses/APIRecentActivity.cs

@@ -4,8 +4,8 @@
 #nullable disable
 
 using System;
-using Humanizer;
 using Newtonsoft.Json;
+using osu.Game.Extensions;
 using osu.Game.Scoring;
 
 namespace osu.Game.Online.API.Requests.Responses
@@ -21,7 +21,7 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty]
         private string type
         {
-            set => Type = (RecentActivityType)Enum.Parse(typeof(RecentActivityType), value.Pascalize());
+            set => Type = (RecentActivityType)Enum.Parse(typeof(RecentActivityType), value.ToPascalCase());
         }
 
         public RecentActivityType Type;

osu.Game/Online/API/Requests/Responses/APIScoreWithPosition.cs

@@ -16,11 +16,11 @@ namespace osu.Game.Online.API.Requests.Responses
         public int? Position;
 
         [JsonProperty(@"score")]
-        public APIScore Score;
+        public SoloScoreInfo Score;
 
         public ScoreInfo CreateScoreInfo(RulesetStore rulesets, BeatmapInfo beatmap = null)
         {
-            var score = Score.CreateScoreInfo(rulesets, beatmap);
+            var score = Score.ToScoreInfo(rulesets, beatmap);
             score.Position = Position;
             return score;
         }

osu.Game/Online/API/Requests/Responses/APIScoresCollection.cs

@@ -11,9 +11,9 @@ namespace osu.Game.Online.API.Requests.Responses
     public class APIScoresCollection
     {
         [JsonProperty(@"scores")]
-        public List<APIScore> Scores;
+        public List<SoloScoreInfo> Scores;
 
-        [JsonProperty(@"userScore")]
+        [JsonProperty(@"user_score")]
         public APIScoreWithPosition UserScore;
     }
 }

osu.Game/Online/API/Requests/Responses/APIUser.cs

@@ -34,8 +34,19 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"previous_usernames")]
         public string[] PreviousUsernames;
 
+        private CountryCode? countryCode;
+
+        public CountryCode CountryCode
+        {
+            get => countryCode ??= (Enum.TryParse(country?.Code, out CountryCode result) ? result : default);
+            set => countryCode = value;
+        }
+
+#pragma warning disable 649
+        [CanBeNull]
         [JsonProperty(@"country")]
-        public Country Country;
+        private Country country;
+#pragma warning restore 649
 
         public readonly Bindable<UserStatus> Status = new Bindable<UserStatus>();
 
@@ -256,5 +267,13 @@ namespace osu.Game.Online.API.Requests.Responses
         public int OnlineID => Id;
 
         public bool Equals(APIUser other) => this.MatchesOnlineID(other);
+
+#pragma warning disable 649
+        private class Country
+        {
+            [JsonProperty(@"code")]
+            public string Code;
+        }
+#pragma warning restore 649
     }
 }

osu.Game/Online/API/Requests/Responses/SoloScoreInfo.cs

@@ -0,0 +1,156 @@
+// 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 Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using osu.Game.Beatmaps;
+using osu.Game.Database;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    [Serializable]
+    public class SoloScoreInfo : IHasOnlineID<long>
+    {
+        [JsonProperty("replay")]
+        public bool HasReplay { get; set; }
+
+        [JsonProperty("beatmap_id")]
+        public int BeatmapID { get; set; }
+
+        [JsonProperty("ruleset_id")]
+        public int RulesetID { get; set; }
+
+        [JsonProperty("build_id")]
+        public int? BuildID { get; set; }
+
+        [JsonProperty("passed")]
+        public bool Passed { get; set; }
+
+        [JsonProperty("total_score")]
+        public int TotalScore { get; set; }
+
+        [JsonProperty("accuracy")]
+        public double Accuracy { get; set; }
+
+        [JsonProperty("user_id")]
+        public int UserID { get; set; }
+
+        // TODO: probably want to update this column to match user stats (short)?
+        [JsonProperty("max_combo")]
+        public int MaxCombo { get; set; }
+
+        [JsonConverter(typeof(StringEnumConverter))]
+        [JsonProperty("rank")]
+        public ScoreRank Rank { get; set; }
+
+        [JsonProperty("started_at")]
+        public DateTimeOffset? StartedAt { get; set; }
+
+        [JsonProperty("ended_at")]
+        public DateTimeOffset EndedAt { get; set; }
+
+        [JsonProperty("mods")]
+        public APIMod[] Mods { get; set; } = Array.Empty<APIMod>();
+
+        [JsonIgnore]
+        [JsonProperty("created_at")]
+        public DateTimeOffset CreatedAt { get; set; }
+
+        [JsonIgnore]
+        [JsonProperty("updated_at")]
+        public DateTimeOffset UpdatedAt { get; set; }
+
+        [JsonIgnore]
+        [JsonProperty("deleted_at")]
+        public DateTimeOffset? DeletedAt { get; set; }
+
+        [JsonProperty("statistics")]
+        public Dictionary<HitResult, int> Statistics { get; set; } = new Dictionary<HitResult, int>();
+
+        #region osu-web API additions (not stored to database).
+
+        [JsonProperty("id")]
+        public long? ID { get; set; }
+
+        [JsonProperty("user")]
+        public APIUser? User { get; set; }
+
+        [JsonProperty("beatmap")]
+        public APIBeatmap? Beatmap { get; set; }
+
+        [JsonProperty("beatmapset")]
+        public APIBeatmapSet? BeatmapSet
+        {
+            set
+            {
+                // in the deserialisation case we need to ferry this data across.
+                // the order of properties returned by the API guarantees that the beatmap is populated by this point.
+                if (!(Beatmap is APIBeatmap apiBeatmap))
+                    throw new InvalidOperationException("Beatmap set metadata arrived before beatmap metadata in response");
+
+                apiBeatmap.BeatmapSet = value;
+            }
+        }
+
+        [JsonProperty("pp")]
+        public double? PP { get; set; }
+
+        #endregion
+
+        public override string ToString() => $"score_id: {ID} user_id: {UserID}";
+
+        /// <summary>
+        /// Create a <see cref="ScoreInfo"/> from an API score instance.
+        /// </summary>
+        /// <param name="rulesets">A ruleset store, used to populate a ruleset instance in the returned score.</param>
+        /// <param name="beatmap">An optional beatmap, copied into the returned score (for cases where the API does not populate the beatmap).</param>
+        /// <returns></returns>
+        public ScoreInfo ToScoreInfo(RulesetStore rulesets, BeatmapInfo? beatmap = null)
+        {
+            var ruleset = rulesets.GetRuleset(RulesetID) ?? throw new InvalidOperationException($"Ruleset with ID of {RulesetID} not found locally");
+
+            var rulesetInstance = ruleset.CreateInstance();
+
+            var mods = Mods.Select(apiMod => apiMod.ToMod(rulesetInstance)).ToArray();
+
+            var scoreInfo = ToScoreInfo(mods);
+
+            scoreInfo.Ruleset = ruleset;
+            if (beatmap != null) scoreInfo.BeatmapInfo = beatmap;
+
+            return scoreInfo;
+        }
+
+        /// <summary>
+        /// Create a <see cref="ScoreInfo"/> from an API score instance.
+        /// </summary>
+        /// <param name="mods">The mod instances, resolved from a ruleset.</param>
+        /// <returns></returns>
+        public ScoreInfo ToScoreInfo(Mod[] mods) => new ScoreInfo
+        {
+            OnlineID = OnlineID,
+            User = User ?? new APIUser { Id = UserID },
+            BeatmapInfo = new BeatmapInfo { OnlineID = BeatmapID },
+            Ruleset = new RulesetInfo { OnlineID = RulesetID },
+            Passed = Passed,
+            TotalScore = TotalScore,
+            Accuracy = Accuracy,
+            MaxCombo = MaxCombo,
+            Rank = Rank,
+            Statistics = Statistics,
+            Date = EndedAt,
+            Hash = HasReplay ? "online" : string.Empty, // TODO: temporary?
+            Mods = mods,
+            PP = PP,
+        };
+
+        public long OnlineID => ID ?? -1;
+    }
+}