IKEA stock check

check.js

var ITEMS_TO_CHECK = [
  "S49022524", 
  "S99022526", 
  "S59022528", 
  "S19022530", 
  "S79022532", 
  "S39022534", 
  "S49022538", 
  "S09022540"
];
var STOUGHTON_STORE_CODE = "158";
var AVAILABILITY_URL = "http://www.ikea.com/us/en/iows/catalog/availability/";

function checkAllItems() {
  var existingItems = ITEMS_TO_CHECK.filter(checkItem);
  if(existingItems.length > 0) {
    GmailApp.sendEmail("__", "Ikea items in stock", existingItems.join(", "));
  }
}

    
    
function checkItem(item) {
  var avaliabilityDataXML = XmlService.parse(UrlFetchApp.fetch(AVAILABILITY_URL + item))
  var yourStoreData = avaliabilityDataXML.getRootElement()
    .getChild("availability")
    .getChildren()
    .filter(function(child) {
      return child.getAttribute("buCode") == "[buCode='" + STOUGHTON_STORE_CODE + "']";
    })[0];
  return yourStoreData.getChild("stock").getChild("availableStock").getText() > 0;
}