From 3519398a224ba44f2f2e91ba6dd3aa921741a6a9 Mon Sep 17 00:00:00 2001
From: Henry Lin <henry.ys.lin@gmail.com>
Date: Sun, 16 May 2021 11:16:12 +0800
Subject: [PATCH] Added "flip" mod for taiko

---
 osu.Game.Rulesets.Taiko/Mods/TaikoModFlip.cs | 32 ++++++++++++++++++++
 osu.Game.Rulesets.Taiko/TaikoRuleset.cs      |  2 +-
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 osu.Game.Rulesets.Taiko/Mods/TaikoModFlip.cs

diff --git a/osu.Game.Rulesets.Taiko/Mods/TaikoModFlip.cs b/osu.Game.Rulesets.Taiko/Mods/TaikoModFlip.cs
new file mode 100644
index 0000000000..1f2f2c4784
--- /dev/null
+++ b/osu.Game.Rulesets.Taiko/Mods/TaikoModFlip.cs
@@ -0,0 +1,32 @@
+// 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.Graphics.Sprites;
+using osu.Game.Beatmaps;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Taiko.Beatmaps;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Rulesets.Taiko.Mods
+{
+    public class TaikoModFlip : Mod, IApplicableToBeatmap
+    {
+        public override string Name => "Flip";
+        public override string Acronym => "FP";
+        public override string Description => @"Dons become kats, kats become dons";
+        public override ModType Type => ModType.Conversion;
+        public override double ScoreMultiplier => 1;
+
+        public void ApplyToBeatmap(IBeatmap beatmap)
+        {
+            var taikoBeatmap = (TaikoBeatmap)beatmap;
+
+            foreach (var obj in taikoBeatmap.HitObjects)
+            {
+                if (obj is Hit hit)
+                    hit.Type = hit.Type == HitType.Centre ? HitType.Rim : HitType.Centre; 
+            }
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Taiko/TaikoRuleset.cs b/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
index f4e158ec32..26dc1bd416 100644
--- a/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
+++ b/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
@@ -133,7 +133,7 @@ public override IEnumerable<Mod> GetModsFor(ModType type)
                 case ModType.Conversion:
                     return new Mod[]
                     {
-                        new TaikoModRandom(),
+                        new MultiMod(new TaikoModFlip(), new TaikoModRandom()),
                         new TaikoModDifficultyAdjust(),
                         new TaikoModClassic(),
                     };