'use strict';
const express = require('express')
const { Crawler, middleware } = require('es6-crawler-detect')
const app = express()
app.get('your/route', function async (request, response) {
  // create a new Crawler instance
  var CrawlerDetector = new Crawler(request)
  
  // check the current visitor's useragent
  if ( CrawlerDetector.isCrawler() )
  {
    // true if crawler user agent detected
  }
  
  // or check a user agent string
  if ( CrawlerDetector.isCrawler('Mozilla/5.0 (compatible; Sosospider/2.0; +https://help.soso.com/webspider.htm)') )
  {
    // true if crawler user agent detected
  }
  
  // Output the name of the bot that matched (if any)
  response.send(CrawlerDetector.getMatches())
})
/**
 * Or by using the middleware
*/
app.use(middleware((request, reponse) => {
  // do something here
  // e.g. console.log(request.body)
  // e.g. return response.status(403).send('Forbidden')
}))
app.get('/crawler', function async (request, response) {
  // or check a user agent string
  request.Crawler.isCrawler('Mozilla/5.0 (compatible; Sosospider/2.0; +https://help.soso.com/webspider.htm)')
  
  // Output the name of the bot that matched (if any)
  response.send(request.Crawler.getMatches())
})