Background jobs for Vercel apps without worker glue

// Runs in any Vercel serverless function: SvelteKit, Nuxt, Astro, Next.js, etc.
async function enqueueBackgroundJob(payload) {
  const res = await fetch(process.env.INQUIR_GATEWAY_URL + '/jobs/process-upload', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${process.env.INQUIR_API_KEY}`,
    },
    body: JSON.stringify(payload),
  });
  // Gateway always returns 202; job runs in the Inquir pipeline
  return res.json(); // { jobId, status: 'queued' }
}

export async function handler(event) {
  const body = JSON.parse(event.body || '{}');
  if (!body.uploadId) {
    return { statusCode: 400, body: JSON.stringify({ error: 'uploadId required' }) };
  }
  // Enqueue async work; returns immediately — the pipeline step runs outside the HTTP window
  const { instanceId: jobId } = await global.durable.startNew('process-upload', undefined, body);
  return { statusCode: 202, body: JSON.stringify({ jobId, status: 'queued' }) };
}

export async function handler(event) {
  // event.payload carries the body the Vercel app sent
  const { uploadId, userId } = event.payload ?? {};
  const result = await transformFile(uploadId);
  await storage.put(`processed/${uploadId}`, result);
  await notifyUser(userId, uploadId);
  return { uploadId, bytes: result.byteLength };
}