get purchases items from carrefour spanish web

carrefour-purchases.js

import fetch from "node-fetch";
import { writeFileSync } from "fs";

const HEADERS = {/* copy from chrome */};

const getPurchaseItems = async (id) => {
  console.log("getting purchase:", id);
  const prom = fetch(
    `https://api.carrefour.es/marketing-digital/prod/tickets/${id}`,
    {
      insecureHTTPParser: true,
      "headers": HEADERS,
      "body": null,
      "method": "GET",
    },
  ).then((r) => r.json());
  try {
    const res = await prom;
    console.log({ res });
    return res.items;
  } catch (err) {
    console.log("error getting purchase:", id);
  }
};

const listPurchases = async () => {
  const allPurchases = new Set();
  let offset = 0;
  let prevSize = 0;
  while (true) {
    const { purchases } = await fetch(
      `https://api.carrefour.es/marketing-digital/prod/purchases?from=2000-05-02T12:10:33.276Z&to=2200-05-03T12:10:33.276Z&atgfOffset=1&atgnfOffset=0&currentAtgfOrders=0&currentAtgnfOrders=0&currentTickets=10&ticketOffset=${offset}&count=10&getEcommerceSession=false`,
      {
        insecureHTTPParser: true,
        headers: HEADERS,
      },
    ).then((r) => r.json());
    purchases.map(({ purchaseId }) => purchaseId).forEach((e) =>
      allPurchases.add(e)
    );
    console.log(allPurchases);
    if (allPurchases.size !== prevSize) {
      prevSize = allPurchases.size;
      offset += 10;
    } else break;
  }
  return Array.from(allPurchases);
};

(async () => {
  const allPurchases = await listPurchases();
  const allItems = await Promise.all(allPurchases.map(async (p) => {
    const a = await getPurchaseItems(p);
    console.log({ a });
    return a;
  }));
  console.log(JSON.stringify(allItems));
  writeFileSync("./items.json", JSON.stringify(allItems));
})();