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 db = require('./config/connection')
const session = require('express-session')
var fileUpload = require('express-fileupload')
var hbs = require('express-handlebars')
const dotenv=require('dotenv').config()



const Handlebars = require('handlebars');
const H = require('just-handlebars-helpers');

var userRouter = require('./routes/user');
var adminRouter = require('./routes/admin');

var app = express();
H.registerHelpers(Handlebars);

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.engine('hbs', hbs({
  helpers: {
    math: function (lvalue, opeator, rvalue) {
      lvalue = parseFloat(lvalue);
      rvalue = parseFloat(rvalue);
      return {
        "+": lvalue + rvalue,
        "-": lvalue - rvalue,
        "*": lvalue * rvalue,
        "/": lvalue / rvalue,
        "%": lvalue % rvalue,
      }[opeator];
    }
  },
  extname: 'hbs', defaultLayout: 'layout', layoutsDir: __dirname + '/views/layout/', partialsDir: __dirname + '/views/partials/'
}))


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

app.use(fileUpload())

app.use(function (req, res, next) {
  res.set('Cache-Control', 'no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0');
  next();
})
app.use(session({
  secret: 'keyboard cat',
  resave: true,
  saveUninitialized: true,
  cookie: { maxAge: 6000000 }
}))



db.connect((err) => {
  if (err) {
    console.log('Connection Error', err);
  } else {
    console.log('Db conncected');
  }
})

app.use('/', userRouter);
app.use('/admin', adminRouter);

// 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;