wamarket/lib/supabase/proxy.ts

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

const PROTECTED_PREFIXES = ["/dashboard", "/messages", "/needs/new"];

function isProtectedPath(pathname: string) {
  if (PROTECTED_PREFIXES.some((prefix) => pathname.startsWith(prefix))) {
    return true;
  }
  // /needs/[id]/edit
  return /^\/needs\/[^/]+\/edit(\/|$)/.test(pathname);
}

export async function updateSession(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, headers) {
          cookiesToSet.forEach(({ name, value }) =>
            request.cookies.set(name, value)
          );
          supabaseResponse = NextResponse.next({ request });
          cookiesToSet.forEach(({ name, value, options }) =>
            supabaseResponse.cookies.set(name, value, options)
          );
          Object.entries(headers).forEach(([key, value]) =>
            supabaseResponse.headers.set(key, value)
          );
        },
      },
    }
  );

  // Do not run code between createServerClient and getClaims() — this
  // refreshes the session token on every request, which is what keeps
  // users from being randomly logged out.
  const { data } = await supabase.auth.getClaims();
  const user = data?.claims;

  if (!user && isProtectedPath(request.nextUrl.pathname)) {
    const url = request.nextUrl.clone();
    url.pathname = "/auth/login";
    url.searchParams.set("redirect_to", request.nextUrl.pathname);
    return NextResponse.redirect(url);
  }

  return supabaseResponse;
}