app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));



// setting up session data storage
const session=require("express-session");
const MySQLStore=require('express-mysql-session')(session);

var connection = require('./config/db');
var sessionStore = new MySQLStore({}/* session store options */, connection);

app.use(session({
	key: 'session_cookie_name',
	secret: 'session_cookie_secret',
	store: sessionStore,
	resave: false,
	saveUninitialized: true,
  cookie: { maxAge: 10 * 24 * 60 * 60 * 1000 }
}));

//Points to the index file of the routes folder, to guide to all routes.
app.use(require('./routes'));



// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;