From b2bf9ba767050ec1581dd3641885fe1132ac45aa Mon Sep 17 00:00:00 2001
From: Jan Scheiper <janscheiper95@gmail.com>
Date: Sun, 16 Feb 2020 17:36:29 +0100
Subject: [PATCH] added some utility functions from various plugins

---
 index.js     |  1 +
 package.json |  2 +-
 utils.js     | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 utils.js

diff --git a/index.js b/index.js
index 0ac3e31..caaacf7 100644
--- a/index.js
+++ b/index.js
@@ -3,4 +3,5 @@ module.exports = {
 	HCSwitch: require('./SwitchBase'),
 	HCFogmachine: require('./FogmachineBase'),
 	StateUpdateManager: require('./StateUpdateManager'),
+	utils: require('./utils'),
 };
\ No newline at end of file
diff --git a/package.json b/package.json
index ad53446..67eb602 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "homecontrol-control-base",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Base class which all hc-controls inherit from",
   "main": "index.js",
   "scripts": {
diff --git a/utils.js b/utils.js
new file mode 100644
index 0000000..794594c
--- /dev/null
+++ b/utils.js
@@ -0,0 +1,75 @@
+function fillPartialHSL(newcolor, oldcolor) {
+	//console.log(newcolor, oldcolor);
+	let color = {};
+	color.hue = (newcolor.hue != null) ? newcolor.hue : oldcolor.hue;
+	color.sat = (newcolor.sat != null) ? newcolor.sat : oldcolor.sat;
+	color.l = (newcolor.l != null) ? newcolor.l : oldcolor.l;
+	return color;
+}
+
+function clamp(value, min, max) {
+	return Math.min(max, Math.max(min, value));
+}
+
+function HSL_to_RGB(hsl) {
+	let h = hsl.hue / 360;
+	let s = hsl.sat / 100;
+	let l = hsl.l / 100;
+
+	let r, g, b;
+
+	if (s == 0) {
+	  	r = g = b = l; // achromatic
+	} else {
+		let q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+		let p = 2 * l - q;
+
+		r = hue2rgb(p, q, h + 1/3);
+		g = hue2rgb(p, q, h);
+		b = hue2rgb(p, q, h - 1/3);
+	}
+
+	return {
+		red: Math.round(r * 255),
+		green: Math.round(g * 255),
+		blue: Math.round(b * 255)
+	};
+}
+
+function RGB_to_HSL(rgb) {
+	let r = rgb.red / 255;
+	let g = rgb.green / 255;
+	let b = rgb.blue / 255;
+
+	let max = Math.max(r, g, b), min = Math.min(r, g, b);
+
+	if (max == min || max - min < 0.01) {
+		h = s = 0; // achromatic
+	} else {
+		var d = max - min;
+		s = d / (2 - max - min);
+
+		switch (max) {
+			case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+			case g: h = (b - r) / d + 2; break;
+			case b: h = (r - g) / d + 4; break;
+		}
+
+		h /= 6;
+	}
+
+	let l = 1 - 0.5 * s;
+
+	return {
+		hue: Math.round(h * 360),
+		sat: Math.round(s * 100),
+		l: Math.round(l * 100)
+	};
+}
+
+module.exports = {
+    fillPartialHSL,
+    clamp,
+    HSL_to_RGB,
+    RGB_to_HSL,
+};
\ No newline at end of file