text: /*
   * server.js
   * This file is the core of your bot
   *
   * It creates a little server using express
   * So, your bot can be triggered throught "/" route
   *
   * This file was made for locally testing your bot
   * You can test it by running this command
   * curl -X "POST" "http://localhost:5000" -d '{"text": "YOUR_TEXT"}' -H "Content-Type: application/json; charset=utf-8"
   * You might modify the server port ^^^^  depending on your configuration in config.js file
   */
  
  const express = require('express')
  const bodyParser = require('body-parser')
  
  // Load configuration
  require('./config')
  const bot = require('./bot')
  
  // Start Express server
  const app = express()
  app.set('port', process.env.PORT || 5000)
  app.use(bodyParser.json())
  
  
  // Handle / route
  app.use('/', (request, response) => {
    bot.reply(request, response)
      .then(success => {
        console.log(success)
        if (!response.headersSent) { response.status(200) }
      }).catch(error => {
        console.log('Error in your bot:', error)
        if (!response.headersSent) { response.sendStatus(400) }
      })
  })
  
  if (!process.env.REQUEST_TOKEN) {
    console.log('ERROR: process.env.REQUEST_TOKEN variable in src/config.js file is empty ! You must fill this field with the request_token of your bot before launching your bot locally')
  
    process.exit(0)
  } else {
    // Run Express server, on right port
    app.listen(app.get('port'), () => {
      console.log('Our bot is running on port', app.get('port'))
    })
  }
  