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

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/**
* 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.
**/
module.exports = function(RED) {
"use strict";
var blinkstick = require("blinkstick");
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Object.size = function(obj) {
var size = 0;
for (var key in obj) { if (obj.hasOwnProperty(key)) { size++; } }
return size;
};
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function BlinkStick(n) {
RED.nodes.createNode(this,n);
var p1 = /^\#[A-Fa-f0-9]{6}$/
var p2 = /[0-9]+,[0-9]+,[0-9]+/
this.led = blinkstick.findFirst(); // maybe try findAll() (one day)
var node = this;
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this.on("input", function(msg) {
if (msg != null) {
if (Object.size(node.led) !== 0) {
try {
if (p2.test(msg.payload)) {
var rgb = msg.payload.split(",");
node.led.setColor(parseInt(rgb[0])&255, parseInt(rgb[1])&255, parseInt(rgb[2])&255);
}
else {
node.led.setColor(msg.payload.toLowerCase().replace(/\s+/g,''));
}
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}
catch (err) {
node.warn("BlinkStick missing ?");
node.led = blinkstick.findFirst();
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}
}
else {
//node.warn("No BlinkStick found");
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node.led = blinkstick.findFirst();
}
}
});
if (Object.size(node.led) === 0) {
node.error("No BlinkStick found");
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}
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}
RED.nodes.registerType("blinkstick",BlinkStick);
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}