node-gamedig/protocols/minecraft.js

const Core = require('./core'),
    MinecraftVanilla = require('./minecraftvanilla'),
    MinecraftBedrock = require('./minecraftbedrock'),
    Gamespy3 = require('./gamespy3');

/*
Vanilla servers respond to minecraftvanilla only
Some modded vanilla servers respond to minecraftvanilla and gamespy3, or gamespy3 only
Some bedrock servers respond to gamespy3 only
Some bedrock servers respond to minecraftbedrock only
Unsure if any bedrock servers respond to gamespy3 and minecraftbedrock
 */

class Minecraft extends Core {
    constructor() {
        super();
        this.srvRecord = "_minecraft._tcp";
    }
    async run(state) {
        const promises = [];

        const vanillaResolver = new MinecraftVanilla();
        vanillaResolver.options = this.options;
        vanillaResolver.udpSocket = this.udpSocket;
        promises.push((async () => {
            try { return await vanillaResolver.runOnceSafe(); } catch(e) {}
        })());

        const gamespyResolver = new Gamespy3();
        gamespyResolver.options = {
            ...this.options,
            encoding: 'utf8',
        };
        gamespyResolver.udpSocket = this.udpSocket;
        promises.push((async () => {
            try { return await gamespyResolver.runOnceSafe(); } catch(e) {}
        })());

        const bedrockResolver = new MinecraftBedrock();
        bedrockResolver.options = this.options;
        bedrockResolver.udpSocket = this.udpSocket;
        promises.push((async () => {
            try { return await bedrockResolver.runOnceSafe(); } catch(e) {}
        })());

        const [ vanillaState, gamespyState, bedrockState ] = await Promise.all(promises);

        state.raw.vanilla = vanillaState;
        state.raw.gamespy = gamespyState;
        state.raw.bedrock = bedrockState;

        if (!vanillaState && !gamespyState && !bedrockState) {
            throw new Error('No protocols succeeded');
        }

        // Ordered from least worth to most worth (player names / etc)
        if (bedrockState) {
            if (bedrockState.name) state.name = bedrockState.name;
            if (bedrockState.maxplayers) state.maxplayers = bedrockState.maxplayers;
            if (bedrockState.players) state.players = bedrockState.players;
            if (bedrockState.map) state.map = bedrockState.map;
        }
        if (vanillaState) {
            try {
                let name = '';
                const description = vanillaState.raw.description;
                if (typeof description === 'string') {
                    name = description;
                }
                if (!name && typeof description === 'object' && description.text) {
                    name = description.text;
                }
                if (!name && typeof description === 'object' && description.extra) {
                    name = description.extra.map(part => part.text).join('');
                }
                state.name = name;
            } catch(e) {}
            if (vanillaState.maxplayers) state.maxplayers = vanillaState.maxplayers;
            if (vanillaState.players) state.players = vanillaState.players;
        }
        if (gamespyState) {
            if (gamespyState.name) state.name = gamespyState.name;
            if (gamespyState.maxplayers) state.maxplayers = gamespyState.maxplayers;
            if (gamespyState.players.length) state.players = gamespyState.players;
            else if (gamespyState.raw.numplayers) state.players = parseInt(gamespyState.raw.numplayers);
        }
        // remove dupe spaces from name
        state.name = state.name.replace(/\s+/g, ' ');
        // remove color codes from name
        state.name = state.name.replace(/\u00A7./g, '');
    }
}

module.exports = Minecraft;