Crawling offerings in interhyp customer portal

interhyp_crawler.js

(function() {
  const whitelistedIndexes = [0, 10, 12, 14, 16, 18, 20, 22, 24];
  
  const getCsvLine = row => row.join(';');
  
  const removeRedundancy = value => value.replace('Darlehensbetrag ', '');
  
  const getValue = element => `"${element.innerHTML}"`;
  
  const isWhitelisted = (element, index) => whitelistedIndexes.includes(index);
  
  const getTag = row => Array
    .from(
      row.getElementsByTagName('h3').length ? row.getElementsByTagName('h3') :
      row.getElementsByTagName('div').length ? row.getElementsByTagName('div') :
      row.getElementsByTagName('span')
    );
  
  const getRows = container => Array
    .from(container.getElementsByClassName('data-row'))
    .map(getTag)
    .flat()
    .filter(isWhitelisted)
    .map(getValue)
    .map(removeRedundancy);
  
  const getContainers = () => Array
    .from(document.getElementsByClassName('ehyp-package-bids-bid'));
  
  const getCsvData = () => getContainers()
    .map(getRows)
    .map(getCsvLine);
  
  const csvHeader = '"Anbieter";"Kreditsumme";"Effektiver Zins";"Monatsrate";"Sollzinsbindung";"Tilgung";"Restschuld";"Bereitstellungszinsfreie Zeit";"Sondertilgung"\n';
  
  return csvHeader + getCsvData().join('\n');
}());