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const {validate} = require('../../lifx');
const Packet = {
size: 11
};
/**
* @typedef {Object} SetUserPosition
* @property {Number} - UInt8 tileIndex
* @property {Number} - UInt16 reserved
* @property {Number} - Float userX
* @property {Number} - Float userY
*/
/**
* Converts packet specific data from a buffer to an object
* @param {Buffer} buf Buffer containing only packet specific data no header
* @return {SetUserPosition} Information contained in packet
*/
Packet.toObject = function(buf) {
Iif (buf.length !== this.size) {
throw new Error(`Invalid length given for stateTileState64 LIFX packet:${buf.length}:${this.size}`);
}
let offset = 0;
const obj = {};
obj.tileIndex = buf.readUInt8(offset);
offset += 1;
obj.reserved = buf.readUInt16LE(offset);
offset += 2;
obj.userX = buf.readFloatLE(offset);
offset += 4;
obj.userY = buf.readFloatLE(offset);
offset += 4;
return obj;
};
/**
* Converts the given packet specific object into a packet
* @param {SetUserPosition} obj object with configuration data
* @return {Buffer} packet
*/
Packet.toBuffer = function(obj) {
validate.isUInt8(obj.tileIndex);
validate.isUInt16(obj.reserved);
validate.isFloat(obj.userX);
validate.isFloat(obj.userY);
const buf = Buffer.alloc(Packet.size);
buf.fill(0);
let offset = 0;
buf.writeUInt8(obj.tileIndex, offset);
offset += 1;
buf.writeUInt16LE(obj.reserved, offset);
offset += 2;
buf.writeFloatLE(obj.userX, offset);
offset += 4;
buf.writeFloatLE(obj.userY, offset);
offset += 4;
return buf;
};
module.exports = Packet;
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