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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
 
1×
 
 
 
 
 
 
 
 
1×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1×
2×
2×
2×
 
2×
2×
 
2×
 
 
1×
'use strict';
 
var Packet = {
  size: 32
};
 
/**
 * 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;
 
  if (buf.length !== this.size) {
    throw new Error('Invalid length given for setLabel LIFX packet');
  }
 
  obj.label = buf.toString('utf8', offset, offset + 32);
  obj.label = obj.label.replace(/\0/g, '');
  offset += 32;
 
  return obj;
};
 
/**
 * Converts the given packet specific object into a packet
 * @param  {Object} obj object with configuration data
 * @param  {String} obj.label label to set, maximum 32 bytes
 * @return {Buffer} packet
 */
Packet.toBuffer = function (obj) {
  var buf = Buffer.alloc(this.size);
  buf.fill(0);
  var offset = 0;
 
  buf.write(obj.label, offset, 32, 'utf8');
  offset += 32;
 
  return buf;
};
 
module.exports = Packet;