import Core from './core.js' import Varint from 'varint' export default class minecraftvanilla extends Core { async run (state) { const portBuf = Buffer.alloc(2) portBuf.writeUInt16BE(this.options.port, 0) const addressBuf = Buffer.from(this.options.host, 'utf8') const bufs = [ this.varIntBuffer(47), this.varIntBuffer(addressBuf.length), addressBuf, portBuf, this.varIntBuffer(1) ] const outBuffer = Buffer.concat([ this.buildPacket(0, Buffer.concat(bufs)), this.buildPacket(0) ]) const data = await this.withTcp(async socket => { return await this.tcpSend(socket, outBuffer, data => { if (data.length < 10) return const reader = this.reader(data) const length = reader.varint() if (data.length < length) return return reader.rest() }) }) const reader = this.reader(data) const packetId = reader.varint() this.logger.debug('Packet ID: ' + packetId) const strLen = reader.varint() this.logger.debug('String Length: ' + strLen) const str = reader.rest().toString('utf8') this.logger.debug(str) const json = JSON.parse(str) delete json.favicon state.raw = json state.maxplayers = json.players.max state.numplayers = json.players.online if (json.players.sample) { for (const player of json.players.sample) { state.players.push({ id: player.id, name: player.name }) } } } varIntBuffer (num) { return Buffer.from(Varint.encode(num)) } buildPacket (id, data) { if (!data) data = Buffer.from([]) const idBuffer = this.varIntBuffer(id) return Buffer.concat([ this.varIntBuffer(data.length + idBuffer.length), idBuffer, data ]) } }