cylon/lib/device.js

/*
 * device
 * cylonjs.com
 *
 * Copyright (c) 2013-2014 The Hybrid Group
 * Licensed under the Apache 2.0 license.
*/

'use strict';

var Registry = require('./registry'),
    Config = require('./config');

var testMode = function() {
  return process.env.NODE_ENV === 'test' && Config.testMode;
};

// Public: Creates a new Device
//
// opts - object containing Device params
//   name - string name of the device
//   pin - string pin of the device
//   robot - parent Robot to the device
//   connection - connection to the device
//   driver - string name of the module the device driver logic lives in
//
// Returns a new Device
module.exports = function Device(opts) {
  var module;

  if (opts.module) {
    module = Registry.register(opts.module);
  } else {
    module = Registry.findByDriver(opts.driver);
  }

  opts.device = this;

  if (!module) {
    Registry.register('cylon-' + opts.driver);
    module = Registry.findByDriver(opts.driver);
  }

  var driver = module.driver(opts);

  for (var prop in driver) {
    if (typeof driver[prop] === 'function') {
      driver[prop] = driver[prop].bind(driver);
    }
  }

  if (testMode()) {
    var testDriver = Registry.findByDriver('test').driver(opts);

    for (var prop in driver) {
      if (typeof driver[prop] === 'function' && !testDriver[prop]) {
        testDriver[prop] = function() { return true; };
      }
    }

    return testDriver;
  }

  return driver;
};