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| 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 45 46 47 | 1x 1x 1x 1x 1x | 'use strict';
const utils = require('../../lifx').utils;
const Packet = {
size: 24
};
Packet.parseNanoseconds = function(buf) {
if (buf.length !== 8) {
throw new Error('Invalid length given for nanoseconds field');
}
const low = buf.readUInt32LE(0);
const high = buf.readUInt32LE(4);
return (high * 2 * 32 + low) / 1.0E9;
};
/**
* 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) {
const obj = {};
let offset = 0;
// Check length
if (buf.length !== this.size) {
throw new Error('Invalid length given for stateInfo LIFX packet');
}
obj.time = this.parseNanoseconds(utils.readUInt64LE(buf, offset));
offset += 8;
obj.uptime = this.parseNanoseconds(utils.readUInt64LE(buf, offset));
offset += 8;
obj.downtime = this.parseNanoseconds(utils.readUInt64LE(buf, offset));
offset += 8;
return obj;
};
module.exports = Packet;
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