Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | 1x 1x 1x 1x 1x | 'use strict';
const {constants} = require('../../lifx');
const Packet = {
size: 10
};
/**
* 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 stateZone LIFX packet');
}
obj.count = buf.readUInt8(offset);
offset += 1;
obj.index = buf.readUInt8(offset);
offset += 1;
obj.color = {};
obj.color.hue = buf.readUInt16LE(offset);
offset += 2;
obj.color.saturation = buf.readUInt16LE(offset);
offset += 2;
obj.color.brightness = buf.readUInt16LE(offset);
offset += 2;
obj.color.kelvin = buf.readUInt16LE(offset);
offset += 2;
return obj;
};
/**
* Converts the given packet specific object into a packet
* @param {Object} obj object with configuration data
* @param {Number} obj.count between 0 and 255
* @param {Number} obj.index between 0 and 255
* @param {Object} obj.color an object with colors to set
* @param {Number} obj.color.hue between 0 and 65535
* @param {Number} obj.color.saturation between 0 and 65535
* @param {Number} obj.color.brightness between 0 and 65535
* @param {Number} obj.color.kelvin between 2500 and 9000
* @return {Buffer} packet
*/
Packet.toBuffer = function(obj) {
const buf = Buffer.alloc(this.size);
buf.fill(0);
let offset = 0;
if (typeof obj.count !== 'number' && obj.count < 0 || obj.count > 255) {
throw new RangeError('Invalid count value given for stateZone LIFX packet, must be a number between 0 and 255');
}
buf.writeUInt8(obj.count, offset);
offset += 1;
if (typeof obj.index !== 'number' && obj.index < 0 || obj.index > 255) {
throw new RangeError('Invalid index value given for stateZone LIFX packet, must be a number between 0 and 255');
}
buf.writeUInt8(obj.index, offset);
offset += 1;
if (typeof obj.hue !== 'number' && obj.hue < 0 || obj.hue > 65535) {
throw new RangeError('Invalid color hue given for stateZone LIFX packet, must be a number between 0 and 65535');
}
buf.writeUInt16LE(obj.hue, offset);
offset += 2;
if (typeof obj.saturation !== 'number' && obj.saturation < 0 || obj.saturation > 65535) {
throw new RangeError('Invalid color saturation given for stateZone LIFX packet, must be a number between 0 and 65535');
}
buf.writeUInt16LE(obj.saturation, offset);
offset += 2;
if (typeof obj.brightness !== 'number' && obj.brightness < 0 || obj.brightness > 65535) {
throw new RangeError('Invalid color brightness given for stateZone LIFX packet, must be a number between 0 and 65535');
}
buf.writeUInt16LE(obj.brightness, offset);
offset += 2;
if (obj.kelvin === undefined) {
obj.kelvin = constants.HSBK_DEFAULT_KELVIN;
}
if (typeof obj.kelvin !== 'number' && obj.kelvin < 2500 || obj.kelvin > 9000) {
throw new RangeError('Invalid color kelvin given for stateZone LIFX packet, must be a number between 2500 and 9000');
}
buf.writeUInt16LE(obj.kelvin, offset);
offset += 2;
return buf;
};
module.exports = Packet;
|