updated

app.js

+const express = require('express')
+const bodyParser = require('body-parser')
+const session = require('express-session')
+const ONE_HOUR = 1000 * 60 * 60
+const {
+	PORT = 3000,
+	NODE_ENV = 'development',
+	SESS_NAME = 'sid',
+	SESS_SECRET = 'kjkjs9u43jkjkl897sd',
+	SESS_LIFETIME = ONE_HOUR
+} = process.env
+const IN_PROD = NODE_ENV === 'production'
+const app = express()
+
+app.use(bodyParser.urlencoded({
+	extended: true
+}))
+
+const users = [
+	{id: 1,name: 'Alex', email: 'alex@gmail.com', password: '123'},
+	{id: 2,name: 'Max', email: 'max@gmail.com', password: '123'},
+	{id: 3,name: 'Tom', email: 'tom@gmail.com', password: '123'}
+]
+
+
+app.use(session({
+	name: SESS_NAME,
+	resave: false,
+	saveUninitialized: false,
+	secret: SESS_SECRET,
+	cookie: {
+		maxAge: SESS_LIFETIME,
+		sameSite: true,
+		secure: IN_PROD
+	} 
+}))
+
+
+
+
+const redirectLogin = (req,res,next) => {
+	if(!req.session.userId) {
+		console.log('Redirected to login : [NO session]')
+		res.redirect('/login')
+	}else {
+		next()
+	}
+}
+
+
+const redirectHome = (req,res,next) => {
+	if(req.session.userId) {
+		console.log('Redirected to login : [session found]')
+		res.redirect('/home')
+	}else {
+		next()
+	}
+}
+
+app.use((req,res,next)=> {
+	const { userId } = req.session
+	if(userId) {
+		res.locals.user = users.find((user) => { 
+			return user.id === req.session.userId
+		})
+		console.log('session found with session Id = ',userId)
+		console.log('This user found : ',res.locals.user)
+	}
+	next()
+})
+
+
+
+app.get('/',(req,res) => {
+	const {userId} = req.session	
+	res.send(`
+		<h1>Welcome!<h1>
+		${userId ?`		
+			<a href='/home'>Home</a>
+			<form method='post' action='/logout'>
+				<button>Logout</button>
+			</form>	
+		`:`
+			<a href='/login'>Login</a>
+			<a href='/register'>Register</a>		
+		`}
+	`)
+})
+app.get('/home',redirectLogin,(req,res) => {
+	const { user } = res.locals
+	res.send(`
+		<h1>Home</h1>
+		<a href='/'>Main</a>
+		<ul>
+			<li>Name: ${user.name}</li>
+			<li>Email: ${user.email}</li>
+		</ul>
+	`)
+})
+app.get('/login',redirectHome,(req,res) => {
+	res.send(`
+		<h1>Login</h1>
+		<form method='post' action='/login'>
+			<input type='email' name='email' placeholder='Email' required />
+			<input type='password' name='password' placeholder='Password' required />	
+			<input type='submit' />
+		</form>
+		<a href='/register'>Register</a>	
+	`)
+})
+app.get('/register',redirectHome,(req,res) => {
+	res.send(`
+		<h1>Register</h1>
+		<form method='post' action='/register'>
+			<input name='name' placeholder='name' required />
+			<input type='email' name='email' placeholder='Email' required />
+			<input type='password' name='email' placeholder='Email' required />	
+			<input type='submit' />
+		</form>	
+		<a href='/login'>Login</a>
+	`)
+})
+app.post('/login', redirectHome, (req,res) => {
+	const {email , password} = req.body
+	if(email && password) {
+		const user = users.find(user => user.email === email && user.password === password)
+		console.log(user)
+		if(user) {
+			req.session.userId = user.id
+			return res.redirect('/home')
+		}
+	}
+	console.log('Incorrect email and password!')
+	res.redirect('/login')
+})
+app.post('/register',redirectHome,(req,res) => {
+	const {name , email,password} = req.body
+	if(name && email && password) {
+		const exits = user.some((user)=> {
+			return user.email === email
+		})
+		if(!exits) {
+			id: users.length + 1
+			name,
+			email,
+			password
+		}
+		users.push(user)
+		res.session.userId = user.id
+		return res.redirect('/home')
+	}
+	console.log('Incorrect name , email and password!')
+	res.redirect('/register')
+})
+app.post('/logout',redirectLogin,(req,res) => {
+	req.session.destroy(err => {
+		if(err) {
+			return res.redirect('/home')
+		}
+
+		res.clearCookie(SESS_NAME)
+		res.redirect('/login')
+	})
+})
+
+app.listen(PORT,()=> {
+	console.log(`http://localhost:${PORT}`)
+})
\ No newline at end of file

package.json

+{
+  "name": "sessionTest",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "nodemon app"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.18.3",
+    "express": "^4.16.4",
+    "express-session": "^1.15.6"
+  },
+  "devDependencies": {
+    "nodemon": "^1.18.9",
+    "standard": "^12.0.1"
+  }
+}