Added function for retrieve user by cookie

package.json

@@ -30,6 +30,7 @@
 		"react-dom": "^18.2.0",
 		"react-icons": "^5.0.1",
 		"sass": "^1.70.0",
+		"server-only": "^0.0.1",
 		"superjson": "^2.2.1",
 		"zod": "^3.22.4"
 	},

pnpm-lock.yaml

@@ -68,6 +68,9 @@ dependencies:
   sass:
     specifier: ^1.70.0
     version: 1.70.0
+  server-only:
+    specifier: ^0.0.1
+    version: 0.0.1
   superjson:
     specifier: ^2.2.1
     version: 2.2.1
@@ -3084,6 +3087,10 @@ packages:
     dependencies:
       lru-cache: 6.0.0
 
+  /server-only@0.0.1:
+    resolution: {integrity: sha512-qepMx2JxAa5jjfzxG79yPPq+8BuFToHd1hm7kI+Z4zAq1ftQiP7HcxMhDDItrbtwVeLg/cY2JnKnrcFkmiswNA==}
+    dev: false
+
   /set-blocking@2.0.0:
     resolution: {integrity: sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==}
     dev: false

postcss.config.js

@@ -1,5 +1,6 @@
 module.exports = {
   plugins: {
+    'tailwindcss/nesting': {},
     tailwindcss: {},
     autoprefixer: {},
     'postcss-preset-mantine': {},

src/app/dashboard/layout.tsx

@@ -6,6 +6,8 @@ import logo from "@/assets/logos/logo.png"
 import AppHeader from '../../components/AppHeader'
 import AppNavbar from '../../components/AppNavbar'
 import DashboardLayout from '@/components/DashboardLayout'
+import getUser from '@/features/auth/actions/getUser'
+import { redirect } from 'next/navigation'
 
 interface Props {
     children: React.ReactNode
@@ -13,6 +15,12 @@ interface Props {
 
 export default function Layout(props: Props) {
 
+    const user = getUser()
+
+    if (!user){
+        redirect("/login")
+    }
+
     return (
         <DashboardLayout>
             {props.children}

src/features/auth/AuthError.ts

@@ -4,6 +4,7 @@ export enum AuthErrorCode {
     EMAIL_NOT_FOUND = "EMAIL_NOT_FOUND",
     EMPTY_USER_HASH = "EMPTY_USER_HASH",
     INVALID_CREDENTIALS = "INVALID_CREDENTIALS",
+    INVALID_JWT_TOKEN = "INVALID_JWT_TOKEN",
     JWT_SECRET_EMPTY = "JWT_SECRET_NOT_EMPTY",
     USER_ALREADY_EXISTS = "USER_ALREADY_EXISTS",
 }

src/features/auth/actions/getUser.ts

@@ -0,0 +1,22 @@
+"use server"
+
+import { cookies } from "next/headers"
+import "server-only"
+import { decodeJwtToken } from "../authUtils";
+import prisma from "@/db";
+
+export default async function getUser(){
+    const token = cookies().get('token');
+
+    if (!token) return null;
+
+    const decodedToken = decodeJwtToken(token.value) as {id: string, iat: number};
+
+    const user = await prisma.user.findFirst({
+        where: {
+            id: decodedToken.id
+        }
+    });
+
+    return user;
+}

src/features/auth/authUtils.ts

@@ -1,9 +1,9 @@
-import prisma from "@/db";
+import bcrypt from "bcrypt";
+import jwt, { SignOptions, JwtPayload } from "jsonwebtoken";
 import { User } from "@prisma/client";
-import * as bcrypt from "bcrypt";
+import prisma from "@/db";
 import AuthError, { AuthErrorCode } from "./AuthError";
 import authConfig from "@/config/auth";
-import jwt from "jsonwebtoken"
 import UserClaims from "./types/UserClaims";
 
 /**
@@ -27,9 +27,32 @@ export async function comparePassword(password: string, hash: string): Promise<b
     return bcrypt.compare(password, hash);
 }
 
-export function createJwtToken(userclaims: UserClaims, options?: jwt.SignOptions){
+/**
+ * Creates a JWT token based on user claims.
+ * 
+ * @param userClaims - The user claims to encode in the JWT.
+ * @param options - Optional signing options.
+ * @returns The generated JWT token.
+ */
+export function createJwtToken(userClaims: UserClaims, options?: SignOptions): string {
     const secret = process.env.JWT_SECRET;
     if (!secret) throw new AuthError(AuthErrorCode.JWT_SECRET_EMPTY); 
-    const token = jwt.sign(userclaims, secret, options);
+    return jwt.sign(userClaims, secret, options);
-    return token;
+}
+
+/**
+ * Decodes a JWT token and retrieves the payload.
+ * 
+ * @param token - The JWT token to decode.
+ * @returns The decoded payload.
+ */
+export function decodeJwtToken(token: string): JwtPayload | string {
+    const secret = process.env.JWT_SECRET;
+    if (!secret) throw new AuthError(AuthErrorCode.JWT_SECRET_EMPTY);
+
+    try {
+        return jwt.verify(token, secret) as JwtPayload;
+    } catch (error) {
+        throw new AuthError(AuthErrorCode.INVALID_JWT_TOKEN);
+    }
 }