export function readBody(req) {
  return new Promise((resolve, reject) => {
    let body = "";
    req.setEncoding("utf8");
    req.on("data", (chunk) => {
      body += chunk;
    });
    req.on("end", () => resolve(body));
    req.on("error", reject);
  });
}

export function writeJson(res, status, body) {
  res.writeHead(status, { "content-type": "application/json" });
  res.end(JSON.stringify(body));
}

export function writeSse(res, events) {
  res.writeHead(200, {
    "content-type": "text/event-stream",
    "cache-control": "no-store",
    connection: "keep-alive",
  });
  for (const event of events) {
    res.write(`data: ${JSON.stringify(event)}\n\n`);
  }
  res.write("data: [DONE]\n\n");
  res.end();
}