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) {
  config.servers.forEach((server, index) => {
    if (server.host !== bot.options.host) return;

    const {MessageBuilder} = require('prismarine-chat')(bot.version);

    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,
            );
          }
          bot.tellraw('@a', {
            color: 'dark_gray',
            translate: '[%s] [%s] %s \u203a %s',
            with: [
              {
                text: 'Chat',
                color: 'gray',
              },
              {
                text: 'Proxy',
                color: 'gray',
              },
              {
                text: client.username,
                color: 'green',
              },
              MessageBuilder.fromString('&7' + data.message),
            ],
          });
          return;
        }
        targetClient.write(meta.name, data);
      });

      bot.on('end', () => srv.close());
    });
  });
};

module.exports = {inject};