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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 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | 1x 1x 1x 1x 1x | 'use strict';
const {constants} = require('../../lifx');
const Packet = {
size: 50
};
/**
* 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 < 10) {
throw new Error('Invalid length for stateMultiZone LIFX packet, expected minimum 10 but received ' + buf.length);
}
obj.count = buf.readUInt8(offset);
offset += 1;
obj.index = buf.readUInt8(offset);
offset += 1;
obj.color = [];
while (buf.length - offset >= 8) {
const colorObj = {};
colorObj.hue = buf.readUInt16LE(offset);
offset += 2;
colorObj.saturation = buf.readUInt16LE(offset);
offset += 2;
colorObj.brightness = buf.readUInt16LE(offset);
offset += 2;
colorObj.kelvin = buf.readUInt16LE(offset);
offset += 2;
obj.color.push(colorObj);
}
return obj;
};
/**
* Converts the given packet specific object into a packet
* @param {Object} obj object with configuration data
* @param {Number} obj.count zone count, between 0 and 255
* @param {Number} obj.index index of first zone, between 0 and 255
* @param {Array} obj.color an array with 1 to 8 HSBK color objects
* @return {Buffer} packet
*/
Packet.toBuffer = function(obj) {
const buf = Buffer.alloc();
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 stateMultiZone 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 stateMultiZone LIFX packet, must be a number between 0 and 255');
}
buf.writeUInt8(obj.index, offset);
offset += 1;
if (!Array.isArray(obj.color)) {
throw new TypeError('Invalid color value given for stateMultiZone LIFX packet, must be an array');
}
if (obj.color.length < 1 || obj.color.length > 8) {
throw new RangeError('Invalid color value given for stateMultiZone LIFX packet, must be an array of 1 to 8 objects');
}
obj.color.forEach(function(colorObj, index) {
if (colorObj === null || typeof colorObj !== 'object') {
throw new TypeError('Invalid HSBK color value at index ' + index + ', must be a HSBK color object');
}
if (typeof colorObj.hue !== 'number' && colorObj.hue < 0 || colorObj.hue > 65535) {
throw new RangeError('Invalid color hue given at index ' + index + ', must be a number between 0 and 65535');
}
buf.writeUInt16LE(colorObj.hue, offset);
offset += 2;
if (typeof colorObj.saturation !== 'number' && colorObj.saturation < 0 || colorObj.saturation > 65535) {
throw new RangeError('Invalid color saturation given at index ' + index + ', must be a number between 0 and 65535');
}
buf.writeUInt16LE(colorObj.saturation, offset);
offset += 2;
if (typeof colorObj.brightness !== 'number' && colorObj.brightness < 0 || colorObj.brightness > 65535) {
throw new RangeError('Invalid color brightness given at index ' + index + ', must be a number between 0 and 65535');
}
buf.writeUInt16LE(colorObj.brightness, offset);
offset += 2;
if (colorObj.kelvin === undefined) {
colorObj.kelvin = constants.HSBK_DEFAULT_KELVIN;
}
if (typeof colorObj.kelvin !== 'number' && colorObj.kelvin < 2500 || colorObj.kelvin > 9000) {
throw new RangeError('Invalid color kelvin given at index ' + index + ', must be a number between 2500 and 9000');
}
buf.writeUInt16LE(colorObj.kelvin, offset);
offset += 2;
});
return buf;
};
module.exports = Packet;
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