Обработка PDF: async-генерация и извлечение данных

export async function handler(event) {
  const { invoiceId, customerId } = JSON.parse(event.body || '{}');
  if (!invoiceId) return { statusCode: 400, body: JSON.stringify({ error: 'invoiceId required' }) };
  const existing = await db.invoicePdfs.find(invoiceId);
  if (existing?.url) return { statusCode: 200, body: JSON.stringify({ url: existing.url }) };
  await global.durable.startNew('render-invoice-pdf', undefined, { invoiceId, customerId });
  return { statusCode: 202, body: JSON.stringify({ invoiceId, status: 'generating' }) };
}

import puppeteer from 'puppeteer-core';

export async function handler(event) {
  const { invoiceId, customerId } = event; // the input passed to startNew()
  const invoice = await db.invoices.findById(invoiceId);
  const html = renderInvoiceTemplate(invoice);
  const browser = await puppeteer.launch({ executablePath: '/usr/bin/chromium' });
  const page = await browser.newPage();
  await page.setContent(html, { waitUntil: 'networkidle0' });
  const pdfBytes = await page.pdf({ format: 'A4', printBackground: true });
  await browser.close();
  const url = await storage.upload(pdfBytes, `invoices/${invoiceId}.pdf`);
  await db.invoicePdfs.upsert({ invoiceId, url, generatedAt: new Date() });
  return { invoiceId, url };
}