def get_navigation_breadcrumbs(current_path, menu=None, sitemap=None):
# get or create menu for sitemap as needed
if menu == None and sitemap:
sitemap = Sitemap.current_objects.get(slug=sitemap)
try:
menu = Menu.current_objects.filter(sitemap=sitemap).get()
except ObjectDoesNotExist:
# create menu
menu = Menu()
menu.name = unicode(sitemap)
menu.site = sitemap.site
menu.sitemap = sitemap
menu.save()
from navigation.utils import refresh_menu_from_sitemap
refresh_menu_from_sitemap(menu, sitemap)
# create breadcrumbs from menu
items = get_breadcrumbs_from_menu(current_path, menu)
if not items:
return None
# add home item if needed
from urlparse import urlparse
top_url = urlparse(items[-1].url)
if top_url.path != '' and top_url.path != '/':
home_item = MenuItem()
home_item.title = pgettext('navigation', 'Home')
home_item.url = '/'
items.append(home_item)
items.reverse()
return items
