MulliganMates/middleware.ts

import { createServerClient } from '@supabase/ssr'
import { NextResponse, type NextRequest } from 'next/server'

const PUBLIC_PATHS = ['/login', '/auth/confirm']

export async function middleware(request: NextRequest) {
  let supabaseResponse = NextResponse.next({ request })

  const supabase = createServerClient(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
    {
      cookies: {
        getAll() {
          return request.cookies.getAll()
        },
        setAll(cookiesToSet) {
          cookiesToSet.forEach(({ name, value }) =>
            request.cookies.set(name, value),
          )
          supabaseResponse = NextResponse.next({ request })
          cookiesToSet.forEach(({ name, value, options }) =>
            supabaseResponse.cookies.set(name, value, options),
          )
        },
      },
    },
  )

  // Use getClaims() for cryptographic JWT verification (not getSession())
  const {
    data: { user },
  } = await supabase.auth.getUser()

  const { pathname } = request.nextUrl

  const isPublicPath = PUBLIC_PATHS.some((p) => pathname.startsWith(p))

  if (!user && !isPublicPath) {
    const url = request.nextUrl.clone()
    url.pathname = '/login'
    return NextResponse.redirect(url)
  }

  if (user && pathname === '/login') {
    const url = request.nextUrl.clone()
    url.pathname = '/dashboard'
    return NextResponse.redirect(url)
  }

  return supabaseResponse
}

export const config = {
  matcher: [
    '/((?!_next/static|_next/image|favicon.ico|icons|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)',
  ],
}