old-web/app/services/crawlerService.js

// import OlxCrawler from '../helpers/crawlers/olixClawler'
const OlxCrawler = require("../helpers/crawlers/olxClawler");

const crawlers = [
    new OlxCrawler(1, 2, 3),
    // new OlxCrawler(process.env.OLX_FROM_PAGE, process.env.OLX_TO_PAGE, process.env.OLX_MAX_RESULTS),
  ];

  async function crawlAll() {

    for (let crawler of crawlers) {
      try {
        let results = await crawler.crawl()
        for (let saver of savers) {
          try {
            await saver.connect();
            await saver.save(results);
          } catch (e) {
            console.log("Error saving. Trying next saver! ", e);
          }
        }
      } catch (e) {
        console.log("Error crawling. Trying next crawler! ", e);
      }
    }
  
    for (let saver of savers) {
      saver.close();
    }
  }
  
  crawlAll();