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 | 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 26x 26x 26x 2x 2x 1x 2x 2x 2x 2x 2x 2x 2x 26x 2x 1x | 'use strict';
const Tile = require('./tile');
const {validate} = require('../../lifx');
const Packet = {
size: 2 + (Tile.size * 16),
Tile
};
/**
* @typedef {Object} StateDeviceChain
* @property {Number} startIndex - UInt8 startIndex
* @property {Number} totalCount - UInt8 totalCount
* @property {Tile[]} tileDevices- Array of Tiles
*/
/**
* Converts packet specific data from a buffer to an object
* @param {Buffer} buf Buffer containing only packet specific data no header
* @return {StateDeviceChain} Information contained in packet
*/
Packet.toObject = function(buf) {
Iif (buf.length !== this.size) {
throw new Error(`Invalid length given for stateDeviceChain LIFX packet:${buf.length}:${this.size}`);
}
let offset = 0;
const obj = {};
obj.startIndex = buf.readUInt8(offset);
obj.totalCount = Math.min(buf.readUInt8(buf.length - 1), 16);
offset += 1;
obj.tileDevices = Array(obj.totalCount).fill(undefined).map(() => {
const ret = Packet.Tile.toObject(buf, offset);
offset = ret.offset;
return ret.tile;
});
offset += 1;
return obj;
};
/**
* Converts packet specific data from a buffer to an object
* @param {StateDeviceChain} obj - as Object
* @return {Buffer} - Buffer of the packet
*/
Packet.toBuffer = function(obj) {
const buf = Buffer.alloc(this.size);
buf.fill(0);
validate.isUInt8(obj.startIndex, 'stateDeviceChain:start_index');
buf.writeUInt8(obj.startIndex, 0);
const len = Math.min(obj.tileDevices.length, obj.totalCount || 16);
buf.writeUInt8(len, Packet.size - 1);
obj.tileDevices.slice(0, len).reduce((ofs, tile) => {
return Packet.Tile.toBuffer(buf, ofs, tile).offset;
}, 1);
return buf;
};
module.exports = Packet;
|