Split out hover sample debounce logic so it can be more easily used in other places

osu.Game/Graphics/UserInterface/HoverSampleDebounceComponent.cs

@@ -0,0 +1,46 @@
+// 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.Audio;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Input.Events;
+using osu.Game.Configuration;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Handles debouncing hover sounds at a global level to ensure the effects are not overwhelming.
+    /// </summary>
+    public abstract class HoverSampleDebounceComponent : CompositeDrawable
+    {
+        /// <summary>
+        /// Length of debounce for hover sound playback, in milliseconds.
+        /// </summary>
+        public double HoverDebounceTime { get; } = 20;
+
+        private Bindable<double?> lastPlaybackTime;
+
+        [BackgroundDependencyLoader]
+        private void load(AudioManager audio, SessionStatics statics)
+        {
+            lastPlaybackTime = statics.GetBindable<double?>(Static.LastHoverSoundPlaybackTime);
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            bool enoughTimePassedSinceLastPlayback = !lastPlaybackTime.Value.HasValue || Time.Current - lastPlaybackTime.Value >= HoverDebounceTime;
+
+            if (enoughTimePassedSinceLastPlayback)
+            {
+                PlayHoverSample();
+                lastPlaybackTime.Value = Time.Current;
+            }
+
+            return false;
+        }
+
+        public abstract void PlayHoverSample();
+    }
+}