From 3e6de5c8dd5f8c005a331a584ab7720e8745d7da Mon Sep 17 00:00:00 2001
From: Xenira <1288524+Xenira@users.noreply.github.com>
Date: Wed, 6 Mar 2024 23:19:11 +0100
Subject: [PATCH] feat(callback): add callback utils (#18)

---
 plugin/src/util/Callbacks.cs | 45 ++++++++++++++++++++++++++++++++++++
 plugin/src/util/Debouncer.cs | 22 ------------------
 2 files changed, 45 insertions(+), 22 deletions(-)
 create mode 100644 plugin/src/util/Callbacks.cs
 delete mode 100644 plugin/src/util/Debouncer.cs

diff --git a/plugin/src/util/Callbacks.cs b/plugin/src/util/Callbacks.cs
new file mode 100644
index 0000000..71c764f
--- /dev/null
+++ b/plugin/src/util/Callbacks.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Linq;
+using UnityEngine;
+
+namespace PiUtils.Util;
+
+public class Callbacks
+{
+	public static Action<T> Debounce<T>(Action<T> callback, float seconds)
+	{
+		Coroutine timeout = null;
+		T lastValue;
+
+		return (T arg) =>
+		{
+			lastValue = arg;
+			if (timeout != null)
+			{
+				return;
+			}
+
+			timeout = AsyncGameObject.Timeout(() =>
+			{
+				timeout = null;
+				callback(lastValue);
+			}, seconds);
+		};
+	}
+
+	public static Action<T> Unique<T>(Action<T> callback)
+	{
+		Option<T> lastValue = Option<T>.None();
+
+		return (T arg) =>
+		{
+			if (lastValue.Contains(arg))
+			{
+				return;
+			}
+
+			lastValue = Option<T>.Some(arg);
+			callback(arg);
+		};
+	}
+}
diff --git a/plugin/src/util/Debouncer.cs b/plugin/src/util/Debouncer.cs
deleted file mode 100644
index 9feb94e..0000000
--- a/plugin/src/util/Debouncer.cs
+++ /dev/null
@@ -1,22 +0,0 @@
-using System;
-using UnityEngine;
-
-namespace PiUtils.Util;
-
-public class Debouncer
-{
-	public static Action<T> Debounce<T>(Action<T> callback, float seconds)
-	{
-		Coroutine timeout = null;
-
-		return (T arg) =>
-		{
-			if (timeout != null)
-			{
-				AsyncGameObject.Cancel(timeout);
-			}
-
-			timeout = AsyncGameObject.Timeout(() => callback(arg), seconds);
-		};
-	}
-}