text: /**
   * Copyright 2013,2015 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 util = require("util");
      //var exec = require('child_process').exec;
      var spawn = require('child_process').spawn;
      var fs = require('fs');
  
      var gpioCommand = __dirname+'/nrgpio';
  
      if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
          //util.log("Info : Ignoring Raspberry LEDborg specific node.");
          throw "Info : Ignoring Raspberry LEDborg specific node.";
      }
  
      if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
          util.log("[rpi-ledborg] Info : Can't find RPi.GPIO python library.");
          throw "Warning : Can't find RPi.GPIO python library.";
      }
  
      if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
          util.log("[rpi-ledborg] Error : "+gpioCommand+" needs to be executable.");
          throw "Error : nrgpio must to be executable.";
      }
  
      // GPIO pins 11 (R), 13 (G), 15 (B).
  
      function LedBorgNode(n) {
          RED.nodes.createNode(this,n);
          this.pin = n.pin;
          this.set = n.set || false;
          this.level = n.level || 0;
          this.out = n.out || "out";
          var node = this;
          var p1 = /^[0-2][0-2][0-2]$/
          var p2 = /^\#[A-Fa-f0-9]{6}$/
          var p3 = /^\d+,\d+,\d+$/
  
          function inputlistener(msg) {
              var rgb = "000";
  
              if (p1.test(msg.payload)) {
                  rgb = msg.payload;
                  rgb = Number(rgb[0])*50+","+Number(rgb[1])*50+","+Number(rgb[2])*50;
              }
              else if (p2.test(msg.payload)) {
                  var r = Math.floor(parseInt(msg.payload.slice(1,3),16)*100/256).toString();
                  var g = Math.floor(parseInt(msg.payload.slice(3,5),16)*100/256).toString();
                  var b = Math.floor(parseInt(msg.payload.slice(5),16)*100/256).toString();
                  rgb = r+","+g+","+b;
              }
              else if (p3.test(msg.payload)) {
                  var c = msg.payload.split(",");
                  var r1 = Math.floor(parseInt(c[0])*100/256).toString();
                  var g1 = Math.floor(parseInt(c[1])*100/256).toString();
                  var b1 = Math.floor(parseInt(c[2])*100/256).toString();
                  rgb = r1+","+g1+","+b1;
              }
              else {
                  // you can add fancy colours by name here if you want...
                  // these are the @cheerlight ones.
                  var colors = {"red":"200","green":"020","blue":"002","cyan":"022","white":"222","pink":"201","oldlace":"221",
                      "warmwhite":"221","purple":"101","magenta":"202","yellow":"220","amber":"220","orange":"210","black":"000"}
                  if (msg.payload.toLowerCase() in colors) {
                      rgb = colors[msg.payload.toLowerCase()];
                      rgb = Number(rgb[0])*50+","+Number(rgb[1])*50+","+Number(rgb[2])*50;
                  }
                  else {
                      node.warn("Invalid LedBorg colour code");
                  }
              }
  
              if (RED.settings.verbose) { node.log("out: "+msg.payload); }
              if (node.child !== null) { node.child.stdin.write(rgb+"\n"); }
              else { node.warn("Command not running"); }
              node.status({fill:"green",shape:"dot",text:msg.payload});
          }
  
          node.child = spawn(gpioCommand, ["borg","11"]);
          node.running = true;
          node.status({fill:"green",shape:"dot",text:"OK"});
  
          node.on("input", inputlistener);
  
          node.child.stdout.on('data', function (data) {
              if (RED.settings.verbose) { node.log("out: "+data+" :"); }
          });
  
          node.child.stderr.on('data', function (data) {
              if (RED.settings.verbose) { node.log("err: "+data+" :"); }
          });
  
          node.child.on('close', function () {
              node.child = null;
              node.running = false;
              node.status({fill:"red",shape:"circle",text:""});
              if (RED.settings.verbose) { node.log("closed"); }
              if (node.done) { node.done(); }
          });
  
          node.child.on('error', function (err) {
              if (err.errno === "ENOENT") { node.warn('Command not found'); }
              else if (err.errno === "EACCES") { node.warn('Command not executable'); }
              else { node.log('error: ' + err); }
          });
  
          node.on("close", function(done) {
              node.status({fill:"red",shape:"circle",text:""});
              if (node.child != null) {
                  node.done = done;
                  node.child.stdin.write(" close 11");
                  node.child.kill('SIGKILL');
              }
              else { done(); }
  
          });
  
      }
      RED.nodes.registerType("ledborg",LedBorgNode);
  }
  