deepsearch find first

deepsearch_find_first_object_with_property

var deepsearch_find_first = function(needle, haystack, parent) {
  
  var iterable;

  if (Object.prototype.toString.call(haystack) === '[object Array]') {
    iterable = haystack;
  } else if (Object.prototype.toString.call(haystack) === '[object Object]') {
    iterable = Object.keys(haystack);
  } else {
    return;
  }

  if ((haystack || {}).hasOwnProperty(needle)) {
    return haystack[needle];
  }

  for (var i = 0; i < iterable.length; i++) {
    var key = haystack.hasOwnProperty(iterable[i]) ? haystack[iterable[i]] : iterable[i];
    var found = deepsearch_find_first(needle, key, haystack);
    if (found) {
      return found;
    }
  }
  
}

var products = deepsearch_find_first('products', window.dataLayer);

console.log(Array.isArray(products), 'deepsearch should return array');
console.log(products.length > 0, 'deepsearch result length should be > 0');
console.log(products[0].hasOwnProperty('name'), 'products item should have name property');
console.log(products[0].hasOwnProperty('brand'), 'products item should have brand property');
console.log(products[0].hasOwnProperty('category'), 'products item should have category property');
console.log(products[0].hasOwnProperty('id'), 'products item should have id property');