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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 48 49 50 51 52 53 54 55 56 57 | 1x 1x 1x 11x 11x 11x 11x 11x 11x 11x 6x 11x 11x 1x | 'use strict';
const Packet = {
size: 6
};
/**
* 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;
if (buf.length !== this.size) {
throw new Error('Invalid length given for setPower LIFX packet');
}
obj.level = buf.readUInt16LE(offset);
offset += 2;
obj.duration = buf.readUInt32LE(offset);
offset += 4;
return obj;
};
/**
* Converts the given packet specific object into a packet
* @param {Object} obj object with configuration data
* @param {Number} obj.level 0 for off, 65535 for on
* @param {Number} [obj.duration] transition time in milliseconds
* @return {Buffer} packet
*/
Packet.toBuffer = function(obj) {
const buf = Buffer.alloc(this.size);
buf.fill(0);
let offset = 0;
Iif (obj.level !== 0 && obj.level !== 65535) {
throw new RangeError('Invalid level given for setPower LIFX packet, only 0 and 65535 are supported');
}
buf.writeUInt16LE(obj.level, offset);
offset += 2;
// Duration is 0 by default
if (obj.duration !== undefined) {
buf.writeUInt32LE(obj.duration, offset);
}
offset += 4;
return buf;
};
module.exports = Packet;
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