index.js

'use strict';
var Itach;
var net = require('net');

var next = function (cmd, cb) {
  cmd.shift();
  if (typeof cmd[0] === 'number') {
    return setTimeout(function () { return next(cmd, cb); }, cmd[0]);
  }
  return cb(cmd);
};

module.exports = Itach = function (host) {
  this.host = host;
};

Itach.prototype.send = function (command, callback) {
  var err;
  var res = [];
  var socket = new net.Socket();

  if (!this.host) {
    return callback(new Error('No host'));
  }

  if (!Array.isArray(command)) {
    command = [command];
  }

  if (typeof command[0] === 'number') {
    return callback(new Error('First element has to be a command (string)'));
  }

  socket.setEncoding('ASCII');
  socket.connect(4998, this.host);
  socket.on('data', function (chunk) {
    res.push(chunk);
    next(command, function (cmd) {
      command = cmd;
      if (command.length !== 0 && command[0]) {
        socket.write(command[0], 'ASCII');
      } else {
        socket.end();
      }
    });
  });
  socket.on('error', function (error) {
    err = error; // error with connection, closes socket
  });
  socket.on('close', function () {
    if (err) {
      return callback(err);
    }
    return callback(null, res);
  });

  // write first command
  socket.write(command[0], 'ASCII');

};