all files / lib/lifx/packets/ stateVersion.js

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'use strict';
 
var _require = require('lodash'),
    find = _require.find;
 
var _require2 = require('../../lifx'),
    constants = _require2.constants;
 
var Packet = {
  size: 12
};
 
/**
 * Converts packet specific data from a buffer to an object
 * @param  {Buffer} buf Buffer containing only packet specific data no header
 * @return {Object}     Information contained in packet
 */
Packet.toObject = function (buf) {
  var obj = {};
  var offset = 0;
 
  // Check length
  if (buf.length !== this.size) {
    throw new Error('Invalid length given for stateHostFirmware LIFX packet');
  }
 
  obj.vendorId = buf.readUInt32LE(offset);
  var vendor = find(constants.LIFX_VENDOR_IDS, { id: obj.vendorId });
  if (vendor !== undefined) {
    obj.vendorName = vendor.name;
  }
  offset += 4;
 
  obj.productId = buf.readUInt32LE(offset);
  offset += 4;
 
  obj.version = buf.readUInt32LE(offset);
  offset += 4;
 
  return obj;
};
 
/**
 * Converts the given packet specific object into a packet
 * @param  {Object} obj object with configuration data
 * @return {Buffer}     packet
 */
Packet.toBuffer = function (obj) {
  var buf = Buffer.alloc(this.size);
  buf.fill(0);
  var offset = 0;
 
  buf.writeUInt32LE(obj.vendor, offset);
  offset += 4;
 
  buf.writeUInt32LE(obj.product, offset);
  offset += 4;
 
  buf.writeUInt32LE(obj.version, offset);
  offset += 4;
 
  return buf;
};
 
module.exports = Packet;