node-gamedig/protocols/armagetron.js

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const Core = require('./core');
class Armagetron extends Core {
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constructor() {
super();
this.encoding = 'latin1';
this.byteorder = 'be';
}
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async run(state) {
const b = Buffer.from([0,0x35,0,0,0,0,0,0x11]);
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const buffer = await this.udpSend(b,b => b);
const reader = this.reader(buffer);
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reader.skip(6);
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state.gamePort = this.readUInt(reader);
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state.raw.hostname = this.readString(reader);
state.name = this.stripColorCodes(this.readString(reader));
state.raw.numplayers = this.readUInt(reader);
state.raw.versionmin = this.readUInt(reader);
state.raw.versionmax = this.readUInt(reader);
state.raw.version = this.readString(reader);
state.maxplayers = this.readUInt(reader);
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const players = this.readString(reader);
const list = players.split('\n');
for(const name of list) {
if(!name) continue;
state.players.push({
name: this.stripColorCodes(name)
});
}
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state.raw.options = this.stripColorCodes(this.readString(reader));
state.raw.uri = this.readString(reader);
state.raw.globalids = this.readString(reader);
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}
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readUInt(reader) {
const a = reader.uint(2);
const b = reader.uint(2);
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return (b<<16) + a;
}
readString(reader) {
const len = reader.uint(2);
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if(!len) return '';
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let out = '';
for(let i = 0; i < len; i += 2) {
const hi = reader.uint(1);
const lo = reader.uint(1);
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if(i+1<len) out += String.fromCharCode(lo);
if(i+2<len) out += String.fromCharCode(hi);
}
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return out;
}
stripColorCodes(str) {
return str.replace(/0x[0-9a-f]{6}/g,'');
}
}
module.exports = Armagetron;