guest_worker/scanimation/LocalServer.js

const express = require('express'),
      app = express(),
      server = require('http').Server(app),
      io = require('socket.io')(server),
      fs = require('fs'),
      watch = require('node-watch')




let LocalServer = (config) => {

    let ls = {
      express: express,
      app: app,
      server: server,
      io: io
    }


    app.use(express.static(config.frontend_folder))

    io.on('connection', function(socket){
      console.log('client connected')
      socket.emit('connection')



// FRAME ANIMATION /////////////////////////////////////////////////////////////

      socket.on('animationInit', function(){
        fs.readdir(config.frames_folder, (err, files) => {
		files = files.filter(file => file.endsWith('.jpg'))
          socket.emit('frameData', {frames: files})
          console.log('starting animation')
        })
      })

      watch(config.frames_folder, function(e, name){
        fs.readdir(config.frames_folder, (err, files) => {
		files = files.filter(file => file.endsWith('.jpg'))
          socket.emit('frameData', {frames: files})
          console.log(`frames changed => ${name}`)
        })
      })



////////////////////////////////////////////////////////////////////////////////



    })


    ls.start = () => {
      server.listen(config.port, function(){
        console.log(`node server listening on port ${config.port}`)
      })
    }





    return ls

}
module.exports = LocalServer