node-red/nodes/hardware/76-blinkstick.js

/**
 * Copyright 2013 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var RED = require("../../red/red");
var blinkstick = require("blinkstick");

Object.size = function(obj) {
	var size = 0, key;
	for (key in obj) {
		if (obj.hasOwnProperty(key)) size++;
	}
	return size;
};

function BlinkStick(n) {
	RED.nodes.createNode(this,n);
	var p1 = /^\#[A-Za-z0-9]{6}$/
	var p2 = /[0-9]+,[0-9]+,[0-9]+/
	this.led = blinkstick.findFirst(); // maybe try findAll() (one day)
	var node = this;

	node.log("started");
	this.on("input", function(msg) {
		if (msg != null) {
			if (Object.size(blinkstick.findFirst()) !== 0) {
				if (p2.test(msg.payload)) {
					var rgb = msg.payload.split(",");
					node.led.setColor(parseInt(rgb[0]), parseInt(rgb[1]), parseInt(rgb[2]));
				}
				else if ((p1.test(msg.payload))|(p2.test(msg.payload))) {
					node.led.setColor(msg.payload);
				}
				else {
					try {
						node.led.setColor(msg.payload);
					}
					catch (err) {
						node.error("Incorrect format: "+msg.payload);
					}
				}
			}
			else {
				node.error("No BlinkStick found");
			}
		}
	});

}

RED.nodes.registerType("blinkstick",BlinkStick);