node-red-contrib-ledmatrix/02-ledblank.js

Contains the nodes used in TimeSquAir to use the LEDMatrix library

/**
	Copyright © 2015 Digital Airways (www.DigitalAirways.com)
	This work is free. 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.
 **/

module.exports = function(RED) {
    "use strict";
    var Mustache = require("mustache");

    var CMD = "rm -f {{{dest}}} 2>> {{{log}}};\n";

    function ledblank(n) {
        RED.nodes.createNode(this,n);

        this.text = n.text;

        var node = this;

        this.on('input', function (msg) {
            var params = {
                dest: "{{{finalppm}}}",
                log: "/root/userdir/ledmatrix/log.txt"
            }
            var cmd = Mustache.render(CMD, params);
            if(typeof msg.cmd != "string") {
                msg.cmd = "";       
            }
            msg.cmd += cmd;
            node.send(msg);
        });
    }
    RED.nodes.registerType("ledblank", ledblank);

}