function makeResponse(body: string, status: number): Response {
  return new Response(body, {
    headers: {
      "content-type": "application/json",
    },
    status,
  });
}

export async function onRequestPost(context: RequestContext) {
  const { user } = context.data.body;

  if (!user) return makeResponse('{"error":"No user provided"}', 400);

  const existingUser = await context.env.DATA.get(`gamemod_${user}`);

  if (existingUser)
    return makeResponse('{"error":"Cannot add an existing user"}', 400);

  if (
    ["165594923586945025", "289372404541554689", "396347223736057866"].includes(
      user
    )
  )
    return new Response(null, {
      status: 204,
    });

  if (!user.match(/^\d{17,19}$/))
    return makeResponse('{"error":"Invalid User ID"}', 400);

  await context.env.DATA.put(
    `gamemod_${user}`,
    JSON.stringify({ time: Date.now(), user: context.data.current_user.id })
  );

  return new Response(null, {
    status: 204,
  });
}