text: const _ = require('underscore');
  const { Language } = require('node-nlp');
  
  const RegisterType = require('../lib/node-installer');
  const { isCommand } = require('../lib/helpers/regexps');
  const { isValidMessage } = require('../lib/helpers/utils');
  const GlobalContextHelper = require('../lib/helpers/global-context-helper');
  
  module.exports = function(RED) {
    const registerType = RegisterType(RED);
    const globalContextHelper = GlobalContextHelper(RED);
  
    function ChatBotLanguage(config) {
      RED.nodes.createNode(this, config);
      const node = this;
      globalContextHelper.init(this.context().global);
  
      this.on('input', async function(msg, send, done) {
        // send/done compatibility for node-red < 1.0
        send = send || function() { node.send.apply(node, arguments) };
        done = done || function(error) { node.error.call(node, error, msg) };
        // check if valid message
        if (!isValidMessage(msg, node)) {
          done();
          return;
        }
        // exit if not string
        if (_.isString(msg.payload.content)) {
          // if it's a command, then don't care about the language
          if (isCommand(msg.payload.content)) {
            send(msg);
            done();
            return;
          }
          // now detect
          const languageGuesser = new Language();
          const guess = languageGuesser.guess(msg.payload.content);
          if (!_.isEmpty(guess)) {
            await msg.chat().set('language', guess[0].alpha2);
          }
        }
        // go through
        node.send(msg);
        done();
      });
    }
  
    registerType('chatbot-language', ChatBotLanguage);
  };
  