node-gamedig/protocols/starmade.js

class Starmade extends require('./core') {
    constructor() {
        super();
        this.encoding = 'latin1';
        this.byteorder = 'be';
    }
    run(state) {
        const b = Buffer.from([0x00,0x00,0x00,0x09,0x2a,0xff,0xff,0x01,0x6f,0x00,0x00,0x00,0x00]);

        this.tcpSend(b,(buffer) => {
            const reader = this.reader(buffer);

            if(buffer.length < 4) return false;
            const packetLength = reader.uint(4);
            if(buffer.length < packetLength+12) return false;

            const data = [];
            state.raw.data = data;

            reader.skip(2);
            while(!reader.done()) {
                const mark = reader.uint(1);
                if(mark === 1) {
                    // signed int
                    data.push(reader.int(4));
                } else if(mark === 3) {
                    // float
                    data.push(reader.float());
                } else if(mark === 4) {
                    // string
                    const length = reader.uint(2);
                    data.push(reader.string(length));
                } else if(mark === 6) {
                    // byte
                    data.push(reader.uint(1));
                }
            }

            if(data.length < 9) {
                this.fatal("Not enough units in data packet");
                return true;
            }

            if(typeof data[3] === 'number') state.raw.version = data[3].toFixed(7).replace(/0+$/, '');
            if(typeof data[4] === 'string') state.name = data[4];
            if(typeof data[5] === 'string') state.raw.description = data[5];
            if(typeof data[7] === 'number') state.raw.numplayers = data[7];
            if(typeof data[8] === 'number') state.maxplayers = data[8];

            if('numplayers' in state.raw) {
                for(let i = 0; i < state.raw.numplayers; i++) {
                    state.players.push({});
                }
            }

            this.finish(state);
            return true;
        });
    }
}

module.exports = Starmade;