Nova ro market scrapper

scrapper.js

const BASE_URL = 'https://www.novaragnarok.com/?module=vending&action=item&id=';

let table = $("table#itemtable").DataTable();
let data = table.rows().data();

let ITEMS = {};

for (let i = 0; i < data.length; i++) {
    let item_id = data[i][1];
    let quantity = data[i][4];
    ITEMS[item_id] = quantity;
}
const ITEMS_LENGTH = Object.keys(ITEMS).length;

const result = {};

const fetchData = (url) => {
  return new Promise((resolve, reject) => {
    const request = new XMLHttpRequest();
    request.open('GET', url, true); // Make the request asynchronous
    request.onload = function () {
      if (request.status === 200) {
        const html = request.responseText;
        const parser = new DOMParser();
        const doc = parser.parseFromString(html, 'text/html');
        const table = doc.getElementById('nova-table-stats');

        if (!table) {
          console.log('No market table found in the page.');
          resolve();
          return;
        }

        const tbody = table.querySelector('tbody');
        if (!tbody) {
          console.log('The table doesn\'t have a body!');
          resolve();
          return;
        }

        const rows = tbody.querySelectorAll('tr');
        if (rows.length !== 2) {
          console.log('Too many rows in the table. Not sure what to do!');
          resolve();
          return;
        }
        const secondRow = rows[1];
        const columns = secondRow.querySelectorAll('td');

        if (columns.length !== 6) {
          console.log('Row structure is different than the expected!');
          resolve();
          return;
        }
        const rawAverageMonthlyPrice = columns[4].textContent;
        const strippedString = rawAverageMonthlyPrice.replace(/,/g, "").replace("z", "");
        const averageMonthlyPrice = parseInt(strippedString, 10);

        const pageTitleElement = doc.querySelector('title');
        const pageTitle = pageTitleElement ? pageTitleElement.textContent : '';
        const itemName = pageTitle.split(' - ')[0];

        result[itemName] = averageMonthlyPrice;

        resolve();
      } else {
        console.log('Request failed:', request.status);
        resolve();
      }
    };
    request.onerror = function () {
      console.log('Request failed:', request.status);
      resolve();
    };
    request.send();
  });
};

const fetchItems = async () => {
  for (const [index, [item_id, quantity]] of Object.entries(ITEMS).entries()) {
    const url = `${BASE_URL}${item_id}`;
    await fetchData(url, index, item_id, quantity);
    console.log(`Fetched item ${index+1} out of ${ITEMS_LENGTH}...`);
  }
};

fetchItems().then(( => {
  // Transform the object into an array and sort based on the highest value.
  const entries = Object.entries(result);
  entries.sort((a, b) => b[1] - a[1]);
  const sortedResult = entries.map(([key, value]) => ({
    key,
    value: value.toLocaleString() + "z"
  }));
  const output = sortedResult.map(obj => `${obj.key}: ${obj.value}`).join('\n');
  console.log(output);
});