server.js

import express from 'express'
import { createServer } from 'http'
import path from 'path'
import { Socket } from 'socket.io'
import { toBuffer } from 'qrcode'
import fetch from 'node-fetch'

function connect(conn, PORT) {
let app = global.app = express()
console.log(app)
let server = global.server = createServer(app)
let _qr = 'invalid'

conn.ev.on('connection.update', function appQR({ qr }) {
if (qr) _qr = qr
})

app.use(async (req, res) => {
res.setHeader('content-type', 'image/png')
res.end(await toBuffer(_qr))
})
  
server.listen(PORT, () => {
console.log('App listened on port', PORT)
if (opts['keepalive']) keepAlive()
})}

function pipeEmit(event, event2, prefix = '') {
let old = event.emit
event.emit = function (event, ...args) {
old.emit(event, ...args)
event2.emit(prefix + event, ...args)
}
return {
unpipeEmit() {
event.emit = old
}}} 

function keepAlive() {
const url = `https://${process.env.REPL_SLUG}.${process.env.REPL_OWNER}.repl.co`
if (/(\/\/|\.)undefined\./.test(url)) return
setInterval(() => {
fetch(url).catch(console.error)
}, 5 * 1000 * 60)}

export default connect

/*import express from 'express' 
import {createServer} from 'http'
import path from 'path'
import { join, dirname } from 'path'
import {Socket} from 'socket.io'
import {toBuffer} from 'qrcode'
import fetch from 'node-fetch'
//import fs from 'fs'
import fs from 'fs/promises'
import { watchFile, unwatchFile } from "fs"
import { fileURLToPath } from "url"
 
function connect(conn, PORT) {
  const app = global.app = express()
  //console.log(app)
  const server = global.server = createServer(app)
  let _qr = 'QR invalido, probablemente ya hayas escaneado el QR.'

  conn.ev.on('connection.update', function appQR({qr}) {
    if (qr) {
      _qr = qr
      if (global.keepAliveRender === 1 && process.env.RENDER_EXTERNAL_URL) {
        console.log(`Para obtener el código QR ingresa a ${process.env.RENDER_EXTERNAL_URL}/get-qr-code`);
      }
    } 
  })
  
  app.get('/get-qr-code', async (req, res) => {
    res.setHeader('content-type', 'image/png')
    res.end(await toBuffer(_qr))
  });

  app.get('*', async (req, res) => {
    res.json("GATABOT-MD en ejecución");
  });

  server.listen(PORT, async () => {
    console.log('App listened on port', PORT)
    if (global.keepAliveRender === 1) await keepAliveHostRender();
    if (opts['keepalive']) keepAlive()
  })
}

function pipeEmit(event, event2, prefix = '') {
  const old = event.emit;
  event.emit = function(event, ...args) {
    old.emit(event, ...args)
    event2.emit(prefix + event, ...args)
  }
  return {
    unpipeEmit() {
      event.emit = old
    }}
}

function keepAlive() {
  const url = `https://${process.env.REPL_SLUG}.${process.env.REPL_OWNER}.repl.co`
  if (/(\/\/|\.)undefined\./.test(url)) return
  setInterval(() => {
    fetch(url).catch(console.error)
  }, 5 * 1000 * 60)
}


//Kurt18: Esta función va impedir que Render vaya a modo suspensión por inactividad
const keepAliveHostRender = async () => {
const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)
  
//const configPath = path.join(__dirname, 'config.js')
const configPath = join(__dirname, 'config.js')
let configContent = await fs.readFile(configPath, 'utf8')
  try {
      setInterval(async() => {
        if (process.env.RENDER_EXTERNAL_URL) {
          const urlRender = process.env.RENDER_EXTERNAL_URL;
          const res = await fetch(urlRender);
          if (res.status === 200) {
            const result = await res.text();
            console.log(`Resultado desde keepAliveHostRender() ->`, result);
          }
        } else {
        const isInitialConfig = configContent.includes('global.obtenerQrWeb = 1;') && configContent.includes('global.keepAliveRender = 1;')
        if (isInitialConfig) {
          console.log(`No esta usando un Host de Render.com\nCambiando valores de "obtenerQrWeb" y "keepAliveRender" a 0 en 'config.js'`)
          try {
          configContent = configContent.replace('global.obtenerQrWeb = 1;', 'global.obtenerQrWeb = 0;')
          configContent = configContent.replace('global.keepAliveRender = 1;', 'global.keepAliveRender = 0;')
          await fs.writeFile(configPath, configContent, 'utf8')
          console.log('Archivo de configuración actualizado con éxito.')
        } catch (writeError) {
          console.error(`Error al escribir el archivo de 'config.js': `, writeError)
        }}
}
      }, 5 * 1000 * 60)
  } catch (error) {
    console.log(`Error manejado en server.js keepAliveHostRender() detalles: ${error}`);
  }
}

export default connect

let file = fileURLToPath(import.meta.url);
watchFile(file, () => {
unwatchFile(file);
console.log(chalk.redBright("Update 'server.js'"));
import(`${file}?update=${Date.now()}`);
})
*/