cmsplugin-blog menu for use with breadcrumb navigation

menu.py

import itertools
from time import strftime

from django.utils.translation import ugettext_lazy as _
from django.core.urlresolvers import reverse
from django.contrib.auth.models import User

from menus.menu_pool import menu_pool
from menus.base import NavigationNode
from cms.menu_bases import CMSAttachMenu

from cmsplugin_blog.models import Entry, EntryTitle
from tagging.models import Tag, TaggedItem
	
def ordinal(n):
	if 10 <= n % 100 < 20:
		return str(n) + 'th'
	else:
		return  str(n) + {1 : 'st', 2 : 'nd', 3 : 'rd'}.get(n % 10, "th")

class BlogMenu(CMSAttachMenu):
	name = _("Blog Menu")
	def get_nodes(self, request):
		c=itertools.count()
		menu = []
		dates = authors = tags = dict()
		root = next(c)
		
		# Put each entry into buckets according to date
		for entry in Entry.published.all().order_by('-pub_date'):
			y = dates.setdefault(entry.pub_date.year, dict())
			m_slug, m_eng = entry.pub_date.strftime("%m"), entry.pub_date.strftime("%b")
			m = y.setdefault("%s,%s" % (m_slug, m_eng), dict())
			d_slug = entry.pub_date.strftime("%d")
			d_eng = "%s" % (ordinal(int(d_slug)).lstrip("0"))
			d = m.setdefault("%s,%s" % (d_slug, d_eng), [])
			d.append(entry)
					
		# Now go depth first and add menu nodes
		for k_y,v_y in dates.items():
			c_y = next(c)
			menu.append(NavigationNode(_(str(k_y)), reverse("blog_archive_year", kwargs={ 'year' : k_y }) , c_y, parent_id=root))
			for k_m, v_m in v_y.items():
				c_m = next(c)
				menu.append(NavigationNode(_(str(k_m.split(",")[1])), reverse("blog_archive_month", kwargs={ 'year' : k_y, 'month' : k_m.split(',')[0] }), c_m, parent_id=c_y))
				for k_d, v_d in v_m.items():
					#c_d = next(c)
					#menu.append(NavigationNode(_(k_d.split(",")[1]), reverse("blog_archive_day", kwargs={ 'year' : k_y, 'month' : k_m.split(',')[0] , 'day' : k_d.split(',')[0]}), c_d, parent_id=c_m))
					for l in v_d:
						for title in l.entrytitle_set.all():
							menu.append(NavigationNode(_("'%s'"%title.title), reverse("blog_detail", kwargs={ 'year' : k_y, 'month' : k_m.split(',')[0] , 'day' : k_d.split(',')[0], 'slug' : title.slug}), next(c), parent_id=c_m))
		
		# Authors
		c_a = next(c)
		menu.append(NavigationNode(_("Author"), reverse("blog_archive_index") , c_a, parent_id=root))
		for user in User.objects.all():
			menu.append(NavigationNode(_(user.username), reverse("blog_archive_author", kwargs={ 'author' : user.username }) , next(c), parent_id=c_a))
		return menu
		
menu_pool.register_menu(BlogMenu)