Add mania keycount check

osu.Game.Rulesets.Mania.Tests/Editor/Checks/CheckKeyCountTest.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 NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Rulesets.Mania.Edit.Checks;
+using System.Linq;
+
+namespace osu.Game.Rulesets.Mania.Tests.Editor.Checks
+{
+    [TestFixture]
+    public class CheckKeyCountTest
+    {
+        private CheckKeyCount check = null!;
+
+        private IBeatmap beatmap = null!;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckKeyCount();
+
+            beatmap = new Beatmap<HitObject>()
+            {
+                BeatmapInfo = new BeatmapInfo
+                {
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                }
+            };
+        }
+
+        [Test]
+        public void TestKeycountFour()
+        {
+            beatmap.Difficulty.CircleSize = 4;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(0));
+        }
+
+        [Test]
+        public void TestKeycountSmallerThanFour()
+        {
+            beatmap.Difficulty.CircleSize = 1;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckKeyCount.IssueTemplateKeycountTooLow);
+        }
+
+        [Test]
+        public void TestKeycountHigherThanTen()
+        {
+            beatmap.Difficulty.CircleSize = 11;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckKeyCount.IssueTemplateKeycountNonStandard);
+        }
+
+        private BeatmapVerifierContext getContext()
+        {
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/Checks/CheckKeyCount.cs

@@ -0,0 +1,55 @@
+// 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 osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks.Components;
+
+namespace osu.Game.Rulesets.Mania.Edit.Checks
+{
+    public class CheckKeyCount : ICheck
+    {
+        public CheckMetadata Metadata => new CheckMetadata(CheckCategory.Settings, "Check mania keycount.");
+
+        public IEnumerable<IssueTemplate> PossibleTemplates => new IssueTemplate[]
+        {
+            new IssueTemplateKeycountTooLow(this),
+            new IssueTemplateKeycountNonStandard(this),
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            var diff = context.Beatmap.Difficulty;
+
+            if (diff.CircleSize < 4)
+            {
+                yield return new IssueTemplateKeycountTooLow(this).Create(diff.CircleSize);
+            }
+
+            if (diff.CircleSize > 10)
+            {
+                yield return new IssueTemplateKeycountNonStandard(this).Create(diff.CircleSize);
+            }
+        }
+
+        public class IssueTemplateKeycountTooLow : IssueTemplate
+        {
+            public IssueTemplateKeycountTooLow(ICheck check)
+                : base(check, IssueType.Problem, "Key count is {0} and must be 4 or higher.")
+            {
+            }
+
+            public Issue Create(float current) => new Issue(this, current);
+        }
+
+        public class IssueTemplateKeycountNonStandard : IssueTemplate
+        {
+            public IssueTemplateKeycountNonStandard(ICheck check)
+                : base(check, IssueType.Warning, "Key count {0} is higher than 10.")
+            {
+            }
+
+            public Issue Create(float current) => new Issue(this, current);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/ManiaBeatmapVerifier.cs

@@ -0,0 +1,24 @@
+// 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 System.Linq;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks.Components;
+using osu.Game.Rulesets.Mania.Edit.Checks;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaBeatmapVerifier : IBeatmapVerifier
+    {
+        private readonly List<ICheck> checks = new List<ICheck>
+        {
+            new CheckKeyCount(),
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            return checks.SelectMany(check => check.Run(context));
+        }
+    }
+}

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -65,6 +65,8 @@ namespace osu.Game.Rulesets.Mania
 
         public override HitObjectComposer CreateHitObjectComposer() => new ManiaHitObjectComposer(this);
 
+        public override IBeatmapVerifier CreateBeatmapVerifier() => new ManiaBeatmapVerifier();
+
         public override ISkin? CreateSkinTransformer(ISkin skin, IBeatmap beatmap)
         {
             switch (skin)

osu.Game/Rulesets/Edit/Checks/CheckAbnormalDifficultySettings.cs

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using osu.Game.Rulesets.Edit.Checks.Components;
 
-
 namespace osu.Game.Rulesets.Edit.Checks
 {
     public class CheckAbnormalDifficultySettings : ICheck
@@ -20,6 +19,7 @@ namespace osu.Game.Rulesets.Edit.Checks
         public IEnumerable<Issue> Run(BeatmapVerifierContext context)
         {
             var diff = context.Beatmap.Difficulty;
+            string ruleset = context.Beatmap.BeatmapInfo.Ruleset.ShortName;
 
             if (hasMoreThanOneDecimalPlace(diff.ApproachRate))
                 yield return new IssueTemplateMoreThanOneDecimal(this).Create("Approach rate", diff.ApproachRate);
@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Edit.Checks
             if (hasMoreThanOneDecimalPlace(diff.CircleSize))
                 yield return new IssueTemplateMoreThanOneDecimal(this).Create("Circle size", diff.CircleSize);
 
-            if (isOutOfRange(diff.CircleSize))
+            if (ruleset != "mania" && isOutOfRange(diff.CircleSize))
                 yield return new IssueTemplateOutOfRange(this).Create("Circle size", diff.CircleSize);