index.js

const express = require('express')

const path = require('path')
const bodyParser = require('body-parser');
const { resolveSoa } = require('dns');
const app = express();

const PORT = process.env.PORT || 4000;
app.use(bodyParser.urlencoded({ extended: true }));
app.listen(PORT, (req, res)=>{
    console.log('server is running at port:', PORT)
})
let users = [
    {name:'Areeba',id:1,email:'areeba@gmail.com',password:'1111'},
    {name:'Abeera',id:1,email:'abeera@gmail.com',password:'2222'}    
]
// app.get('/',(req, res)=>{
//     res.send('<h1>Heyyy Areeba</h1>')
// })
// app.get('/about',(req, res)=>{
//     res.send('<h1>About Us</h1>')
// })
// app.get('/', (req, res)=>{
//     res.sendFile(path.join(__dirname, 'public', 'index.html'))
// })
// app.get('/about', (req, res)=>{
//     res.sendFile(path.join(__dirname, 'public', 'aboutus.html'))
// })
// app.get('/contact', (req, res)=>{
//     res.sendFile(path.join(__dirname, 'public', 'contactus.html'))
// })

app.use(express.static(path.join(__dirname,'public')))

app.get('/signup', (req, res)=>{
    res.sendFile(path.join(__dirname, 'registration', 'signup.html'))
})
app.post('/signup',(req,res)=>{
   let {email, name, password} = req.body
   let found = users.some((item)=>item.email == email)
   let found1 = users.some((item)=>item.password == password)
   if(found && found1){
    //    res.sendFile(path.join(__dirname, 'public', 'index.html'))
    res.redirect('/login')
   } else{
       users.push({name,email,password,id:users.length+1})
      res.sendFile(path.join(__dirname, 'public','index.html'))
    
   }
 
 })

 app.get('/welcome', (req, res)=>{
    res.sendFile(path.join(__dirname, 'public', 'welcome.html'))
})
app.get('/login', (req, res)=>{
    res.sendFile(path.join(__dirname, 'registration', 'login.html'))
})
app.post('/login',(req,res)=>{
    let {email, name, password} = req.body
    let found = users.some((item)=>item.email == email)
    let found1 = users.some((item)=>item.password == password)
    if(found && found1){
        // res.sendFile(path.join(__dirname, 'public', 'index.html'))
        res.redirect('/welcome')
    } else{
    //    res.sendFile(path.join(__dirname, 'registration','signup.html'))
    res.send('<h1>Please Enter Correct Password</h1>')
    //    users.push({name,email,password,id:users.length+1})
    }
  
  })