53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
/**
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* Copyright 2013 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var RED = require(process.env.NODE_RED_HOME+"/red/red");
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var util = require('util');
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var fs = require('fs');
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// check if /dev/ledborg exists - if not then don't even show the node.
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if (!fs.existsSync("/dev/ledborg")) {
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util.log("[78-ledborg.js] Warning: PiBorg hardware : LedBorg not found");
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return;
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}
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function LedBorgNode(n) {
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RED.nodes.createNode(this,n);
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var p1 = /[0-2][0-2][0-2]/
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var p2 = /^\#[A-Fa-f0-9]{6}$/
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var node = this;
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this.on("input", function(msg) {
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if (p1.test(msg.payload)) {
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fs.writeFile('/dev/ledborg', msg.payload, function (err) {
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if (err) node.warn(msg.payload+" : No LedBorg found");
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});
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}
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if (p2.test(msg.payload)) {
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var r = Math.floor(parseInt(msg.payload.slice(1,3),16)/88).toString();
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var g = Math.floor(parseInt(msg.payload.slice(3,5),16)/88).toString();
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var b = Math.floor(parseInt(msg.payload.slice(5),16)/88).toString();
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fs.writeFile('/dev/ledborg', r+g+b, function (err) {
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if (err) node.warn(r+g+b+" : No LedBorg found");
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});
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}
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else {
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node.warn("Invalid LedBorg colour code");
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}
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});
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}
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RED.nodes.registerType("ledborg",LedBorgNode);
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