Next.js фоновые задачи: когда after(), Server Actions и Route Handlers не хватает

'use server';

export async function requestExport(formData: FormData) {
  const exportId = formData.get('exportId') as string;
  if (!exportId) throw new Error('exportId required');

  // Hand off to Inquir — returns before the pipeline finishes
  const res = await fetch(process.env.INQUIR_GATEWAY_URL + '/jobs/run-export', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${process.env.INQUIR_API_KEY}`,
    },
    body: JSON.stringify({ exportId }),
  });
  if (!res.ok) throw new Error('Failed to queue export');
  // Server Action returns; user sees success — Inquir runs the slow work
}

export async function handler(event) {
  const { exportId } = JSON.parse(event.body || '{}');
  if (!exportId) {
    return { statusCode: 400, body: JSON.stringify({ error: 'exportId required' }) };
  }
  // Queue a durable job; pipeline step runs outside the HTTP window
  const { instanceId: jobId } = await global.durable.startNew('run-export', undefined, { exportId });
  return { statusCode: 202, body: JSON.stringify({ jobId, status: 'queued' }) };
}

export async function handler(event) {
  // event.payload carries the body the Server Action sent
  const { exportId } = event.payload ?? {};
  const file = await buildExport(exportId);
  await storage.put(`exports/${exportId}.csv`, file);
  await notifyApp(exportId, file.byteLength);
  return { exportId, bytes: file.byteLength };
}