chomens-bot-js/plugins/proxy.js

/* eslint-disable require-jsdoc */
const mc = require('minecraft-protocol');
const {loadPlugins} = require('../util/loadPlugins');

function inject(bot, dcclient, config) {
  let index;
  config.servers.forEach((server, _index) => {
    if (bot.options.host !== server.host) return;
    index = _index;
  });

  const version = bot.version;
  const srv = mc.createServer({
    'online-mode': false,
    'port': 25566 + index,
    'keepAlive': false,
    version,
  });

  srv.on('login', function(client) {
    bot.console.info(`[Proxy] ${client.username} connected to proxy`);
    let endedClient = false;
    let endedTarget = false;

    const targetClient = mc.createClient({
      username: client.username,
      host: bot.options.host,
      version,
    });

    targetClient.chat = function(message) {
      targetClient.write('chat', {message});
    };

    targetClient.on('login', (packet) => {
      targetClient.entityId = packet.entityId;
      loadPlugins(bot, null, config, null, targetClient, client, true);
    });

    targetClient.on('packet', (data, meta) => {
      if (!endedClient &&
            meta.state === mc.states.PLAY &&
            client.state === mc.states.PLAY
      ) client.write(meta.name, data);
    });

    targetClient.on('error', () => {});

    targetClient.on('end', () => {
      targetClient.end();
      endedTarget = true;
    });

    client.on('end', function() {
      endedClient = true;
      targetClient.end();
      bot.console.info(`[Proxy] ${client.username} ended`);
    });

    client.on('error', function() {
      endedClient = true;
      bot.console.info(`[Proxy] ${client.username} got error`);
    });

    client.on('packet', (data, meta) => {
      if (meta.name === 'chat' && !data.message?.startsWith('/')) {
        if (data.message.startsWith('.')) {
          return bot.command_handler.run(
              client.username,
              client.username,
              '*' + data.message.substring(1),
              client.uuid,
              null,
              'h',
              'o',
              client.username,
          );
        }
        return;
      }
      targetClient.write(meta.name, data);
    });
  });
  bot.once('end', () => {
    srv.close();
    srv.removeAllListeners();
  });
};

module.exports = {inject};