sunrise.js

"use strict";
/* This program is free software. It comes without any warranty, to
     * the extent permitted by applicable law. You can redistribute it
     * and/or modify it under the terms of the Do What The Fuck You Want
     * To Public License, Version 2, as published by Sam Hocevar. See
     * http://www.wtfpl.net/ for more details. */
// jshint esnext:true
const PIN_RED = 4;
const PIN_GREEN = 17;
const PIN_BLUE = 22;
let IFTTT_These = require("ifttt-these");

var piblaster = require('pi-blaster.js');


var ifttt = new IFTTT_These({
  username: "authuser",
  password: "authpw",
  key:      "ifttt-maker-key" // not necessary unless using maker channel
});

ifttt.ifThisThen(
	function() {console.log(ifttt); return ifttt.wasTriggered("Light");},
	function() {setScene(ifttt.state)}
);
let targetState = {
startTime:(new Date()).getTime(), red:0, green:0, blue:0, transition:30, duration:60*60*24
};
let transitionFrom = {red:0,green:0,blue:0};
let currentState = {red:0, green:0, blue:0}
function setScene(state) {
	transitionFrom = {
		red: currentState.red, green: currentState.green, blue: currentState.blue
	};
	if(ifttt.wasTriggered("command")) {
		targetState.duration = 24*60*60; // one day
		targetState.transition = 1; // one second

		switch(state.command.toLowerCase()) {
			case "off":
			targetState.red=0;targetState.green=0;targetState.blue=0;
			break;
			case "on":
			targetState.red=1;targetState.green=1;targetState.blue=1;
			break;
			default:
				var hex = colorNameToHex(state.command.trim());
				if(hex) {
					var color = hexToRgb(hex.substring(1));
					targetState.red = color.red/255.0;
					targetState.green = color.green/255.0;
					targetState.blue = color.blue/255.0;
				} else {
					return; // invalid command
				}
			break;
		}
	} else {
    targetState.red=state.red; targetState.green = state.green; targetState.blue = state.blue;
		targetState.duration = ifttt.wasTriggered('duration') && state.duration || 60*60*24;
		targetState.transition = ifttt.wasTriggered('transition') && state.transition || 0.01;
	}
	targetState.startTime = (new Date()).getTime();

}
function frame() {
	let timeDifferenceSeconds = ((new Date()).getTime() - targetState.startTime) / 1000;
	let i = Math.min(timeDifferenceSeconds / targetState.transition, 1);
	let j = 1.0-i;
	if(timeDifferenceSeconds - targetState.transition > targetState.duration) {
		i = 0;
	}
	currentState = {
		red:j*transitionFrom.red + targetState.red*i,
		green: j*transitionFrom.green + targetState.green*i,
		blue: j*transitionFrom.blue + targetState.blue*i
	};
	piblaster.setPwm(PIN_RED,  currentState.red);
	piblaster.setPwm(PIN_GREEN, currentState.green );
	piblaster.setPwm(PIN_BLUE, currentState.blue);

}
setInterval(frame, 1000/60);

function colorNameToHex(colour)
{
    var colours = {"aliceblue":"#f0f8ff","antiquewhite":"#faebd7","aqua":"#00ffff","aquamarine":"#7fffd4","azure":"#f0ffff",
    "beige":"#f5f5dc","bisque":"#ffe4c4","black":"#000000","blanchedalmond":"#ffebcd","blue":"#0000ff","blueviolet":"#8a2be2","brown":"#a52a2a","burlywood":"#deb887",
    "cadetblue":"#5f9ea0","chartreuse":"#7fff00","chocolate":"#d2691e","coral":"#ff7f50","cornflowerblue":"#6495ed","cornsilk":"#fff8dc","crimson":"#dc143c","cyan":"#00ffff",
    "darkblue":"#00008b","darkcyan":"#008b8b","darkgoldenrod":"#b8860b","darkgray":"#a9a9a9","darkgreen":"#006400","darkkhaki":"#bdb76b","darkmagenta":"#8b008b","darkolivegreen":"#556b2f",
    "darkorange":"#ff8c00","darkorchid":"#9932cc","darkred":"#8b0000","darksalmon":"#e9967a","darkseagreen":"#8fbc8f","darkslateblue":"#483d8b","darkslategray":"#2f4f4f","darkturquoise":"#00ced1",
    "darkviolet":"#9400d3","deeppink":"#ff1493","deepskyblue":"#00bfff","dimgray":"#696969","dodgerblue":"#1e90ff",
    "firebrick":"#b22222","floralwhite":"#fffaf0","forestgreen":"#228b22","fuchsia":"#ff00ff",
    "gainsboro":"#dcdcdc","ghostwhite":"#f8f8ff","gold":"#ffd700","goldenrod":"#daa520","gray":"#808080","green":"#008000","greenyellow":"#adff2f",
    "honeydew":"#f0fff0","hotpink":"#ff69b4",
    "indianred ":"#cd5c5c","indigo":"#4b0082","ivory":"#fffff0","khaki":"#f0e68c",
    "lavender":"#e6e6fa","lavenderblush":"#fff0f5","lawngreen":"#7cfc00","lemonchiffon":"#fffacd","lightblue":"#add8e6","lightcoral":"#f08080","lightcyan":"#e0ffff","lightgoldenrodyellow":"#fafad2",
    "lightgrey":"#d3d3d3","lightgreen":"#90ee90","lightpink":"#ffb6c1","lightsalmon":"#ffa07a","lightseagreen":"#20b2aa","lightskyblue":"#87cefa","lightslategray":"#778899","lightsteelblue":"#b0c4de",
    "lightyellow":"#ffffe0","lime":"#00ff00","limegreen":"#32cd32","linen":"#faf0e6",
    "magenta":"#ff00ff","maroon":"#800000","mediumaquamarine":"#66cdaa","mediumblue":"#0000cd","mediumorchid":"#ba55d3","mediumpurple":"#9370d8","mediumseagreen":"#3cb371","mediumslateblue":"#7b68ee",
    "mediumspringgreen":"#00fa9a","mediumturquoise":"#48d1cc","mediumvioletred":"#c71585","midnightblue":"#191970","mintcream":"#f5fffa","mistyrose":"#ffe4e1","moccasin":"#ffe4b5",
    "navajowhite":"#ffdead","navy":"#000080",
    "oldlace":"#fdf5e6","olive":"#808000","olivedrab":"#6b8e23","orange":"#ffa500","orangered":"#ff4500","orchid":"#da70d6",
    "palegoldenrod":"#eee8aa","palegreen":"#98fb98","paleturquoise":"#afeeee","palevioletred":"#d87093","papayawhip":"#ffefd5","peachpuff":"#ffdab9","peru":"#cd853f","pink":"#ffc0cb","plum":"#dda0dd","powderblue":"#b0e0e6","purple":"#800080",
    "red":"#ff0000","rosybrown":"#bc8f8f","royalblue":"#4169e1",
    "saddlebrown":"#8b4513","salmon":"#fa8072","sandybrown":"#f4a460","seagreen":"#2e8b57","seashell":"#fff5ee","sienna":"#a0522d","silver":"#c0c0c0","skyblue":"#87ceeb","slateblue":"#6a5acd","slategray":"#708090","snow":"#fffafa","springgreen":"#00ff7f","steelblue":"#4682b4",
    "tan":"#d2b48c","teal":"#008080","thistle":"#d8bfd8","tomato":"#ff6347","turquoise":"#40e0d0",
    "violet":"#ee82ee",
    "wheat":"#f5deb3","white":"#ffffff","whitesmoke":"#f5f5f5",
    "yellow":"#ffff00","yellowgreen":"#9acd32",
		"sun":"#FFFF19"
	};

    if (typeof colours[colour.toLowerCase()] != 'undefined')
        return colours[colour.toLowerCase()];

    return false;
}

function hexToRgb(hex) {
    var bigint = parseInt(hex, 16);
    var r = (bigint >> 16) & 255;
    var g = (bigint >> 8) & 255;
    var b = bigint & 255;

    return {red:r,green:g,blue:b};
}