def _parse_category_tree(self, els, parent_category_id, parent_category_name):
categories = []
for el in els:
if el.nodeType == el.ELEMENT_NODE:
cat = Category(self)
cat.category_id = int(self._get_child_node_text(el, "category_id"))
cat.category_name = self._get_child_node_text(el, "category_name")
cat.level = int(self._get_child_node_text(el, "level"))
cat.parent_category_id = parent_category_id
cat.parent_category_name = parent_category_name
subcat_el = self._get_child_element(el, "subcategories")
if (subcat_el):
cat.subcategories = self._parse_category_tree(subcat_el.childNodes,
cat.category_id,
cat.category_name)
categories.append(cat)
return categories
