Next.js Auth Middleware

import { NextRequest, NextResponse } from class=class="text-emerald-400">"text-emerald-400">'next/server'

const protectedPaths = [class=class="text-emerald-400">"text-emerald-400">'/dashboard', class=class="text-emerald-400">"text-emerald-400">'/settings', class=class="text-emerald-400">"text-emerald-400">'/profile']
const authPages = [class=class="text-emerald-400">"text-emerald-400">'/login', class=class="text-emerald-400">"text-emerald-400">'/register']

export function middleware(request: NextRequest) {
  const { pathname } = request.nextUrl
  const token = request.cookies.get(class=class="text-emerald-400">"text-emerald-400">'auth-token')?.value

  const isProtected = protectedPaths.some(path => pathname.startsWith(path))
  const isAuthPage = authPages.some(path => pathname.startsWith(path))

  if (isProtected && !token) {
    const loginUrl = new URL(class=class="text-emerald-400">"text-emerald-400">'/login', request.url)
    loginUrl.searchParams.set(class=class="text-emerald-400">"text-emerald-400">'redirect', pathname)
    return NextResponse.redirect(loginUrl)
  }

  if (isAuthPage && token) {
    return NextResponse.redirect(new URL(class=class="text-emerald-400">"text-emerald-400">'/dashboard', request.url))
  }

  return NextResponse.next()
}

export const config = {
  matcher: [class=class="text-emerald-400">"text-emerald-400">'/dashboard/:path*', class=class="text-emerald-400">"text-emerald-400">'/settings/:path*', class=class="text-emerald-400">"text-emerald-400">'/profile/:path*', class=class="text-emerald-400">"text-emerald-400">'/login', class=class="text-emerald-400">"text-emerald-400">'/register'],
}