import { NextResponse } from "next/server";
import { isAuthed } from "./auth";

export async function guard(): Promise<NextResponse | null> {
  if (await isAuthed()) return null;
  return NextResponse.json({ error: "unauthorized" }, { status: 401 });
}

export function ok<T>(data: T, init?: number) {
  return NextResponse.json(data, { status: init ?? 200 });
}

export function fail(message: string, status = 400) {
  return NextResponse.json({ error: message }, { status });
}

export async function readJson<T = unknown>(req: Request): Promise<T> {
  try {
    return (await req.json()) as T;
  } catch {
    return {} as T;
  }
}