index.js

const RPG = require('./rpg/RPG');

const bodyParser = require('body-parser');
const formidable = require('formidable');
const readline = require('readline');
const express = require('express');
const fs = require('fs');
const app = express();
const port = 9123;

app.use(bodyParser.json({limit: '10mb', extended: true}));
app.use(bodyParser.urlencoded({limit: '10mb', extended: true }));

app.use('/', express.static('public'));


app.post('/convert', function(req, res) {
  var lines = req.body.lines;
  var indent = req.body.indent;
  lines.push('', '');
 
  var conv = new RPG(lines, Number(indent));
  conv.parse();

  res.send({lines, messages: conv.messages});
});

app.post('/fileupload', function(req, res) {
    if (req.url == '/fileupload') {
      var form = new formidable.IncomingForm();
      form.parse(req, function (err, fields, files) {
        var oldpath = files.filetoupload.path;
        var newpath = 'C:/Users/krishna/Documents/a/' + files.filetoupload.name;
        var newLine = []; 
        fs.rename(oldpath, newpath, function (err) {
            if (err) throw err;
            const readInterface = readline.createInterface({
              input: fs.createReadStream(newpath),
              console: false
            });  
           
            let i = 0 ;  
            readInterface.on('line', function(line) {
            newLine.push( line ) ; 
            i++
            });

            // on file close 
            readInterface.on('close', function(line) {
              var conv = new RPG(newLine, Number('2'));
              conv.parse();
              
              fs.unlink(newpath, (err) => {
                if (err) throw err;
                var file = fs.createWriteStream(newpath);
                file.on('error', function(err) { Console.log(err) });
                conv.lines.forEach(value => file.write(`${value}\r\n`));
                file.end();
                file.on('close', function() {
                  res.download(newpath); 
                });
               
              })
            });
        });

     });
    } 
  });
  

app.listen(port, () => console.log(`rpgfreeweb listening on port ${port}!`))