Register/Login implementation

src/routers/user.ts

@@ -0,0 +1,96 @@
+import { PrismaClient, User } from '@prisma/client'
+import express from 'express'
+
+import { z } from 'zod'
+import bcrypt from 'bcrypt'
+import jwt from 'jsonwebtoken'
+import { getJwtSecret } from '../utils/jwt.js'
+
+interface LoginData {
+    email: string,
+    password: string
+}
+
+const userRouter = express.Router()
+const prisma = new PrismaClient()
+
+const LoginValidator = z.object({
+    email: z.string().email(),
+    password: z.string().min(4).max(20)
+})
+
+async function isUserValid(user: User | null, loginData: any): Promise<boolean> {
+    if (user == undefined) return false
+    return await bcrypt.compare(loginData.password, user.password)
+}
+
+async function isUserEmailAlreadyUsed(email: string): Promise<boolean> {
+    const user = await prisma.user.findFirst({ where: { email } })
+    return user != undefined
+}
+
+function parseLoginData(data: any): LoginData | undefined {
+    try {
+        const loginData: LoginData = LoginValidator.parse(data)
+        return loginData
+    } catch {
+        return undefined
+    }
+}
+
+userRouter.post("/login", async (req, res) => {
+    const loginData = parseLoginData(req.body)
+    if (loginData === undefined) {
+        res.status(400).json({ message: 'Incorrect credentials format.' })
+        return;
+    }
+
+    const user = await prisma.user.findFirst({
+        where: {
+            email: loginData.email
+        }
+    })
+
+    if (await isUserValid(user, loginData) === false) {
+        res.status(400).json({ message: 'Incorrect credentials.' })
+        return;
+    }
+
+    const jwtToken = jwt.sign({}, getJwtSecret(), { expiresIn: "1h" })
+
+    res.cookie('jwt', jwtToken, {
+        httpOnly: true,
+        secure: true,
+        sameSite: 'strict'
+    }).json({ message: "Logged in! httpOnly cookie set." })
+})
+
+userRouter.post("/register", async (req, res) => {
+    const loginData = parseLoginData(req.body)
+    if (loginData == undefined) {
+        res.status(400).json({ message: 'Incorrect credentials format.' })
+        return;
+    }
+
+    if (await isUserEmailAlreadyUsed(loginData.email)) {
+        res.status(400).json({ message: 'Email already linked to an account.' })
+        return;
+    }
+
+    const hashedPassword = await bcrypt.hash(loginData.password, 10)
+
+    await prisma.user.create({
+        data: {
+            email: loginData.email,
+            password: hashedPassword,
+            name: '',
+            picture_path: '',
+            created_at: new Date(),
+            updated_at: new Date()
+        },
+    })
+
+    res.json({ message: 'User successfully created!' })
+})
+
+export default userRouter