def process_request(self, request):
		path = request.path
		if not path.startswith('/'):
			path = "/" + path

		acknowledged_announcements = []

		announcements = amodels.Announcement.objects.filter(\
			Q(url__isnull=True)|Q(url__exact=path)).filter(\
			Q(start_time__isnull=True)|Q(start_time__lte=datetime.datetime.now())).filter(\
			Q(expire_time__isnull=True)|Q(expire_time__gte=datetime.datetime.now()))

		if not request.user.is_authenticated():
			announcements = announcements.exclude(auth_only=True)
			acknowledged_announcements.extend(decode_cookie(request.COOKIES))

		else:
			use_auth = True

			for i in getattr(settings,"DATABASE_ROUTERS") or []:
				if "AnnouncementsRouter" in i:
					use_auth = False
					break

			if use_auth:
				announcements = announcements.exclude(auth_acknowledgments=request.user)
				acknowledged_announcements.extend(request.user.announcement_set.values_list('pk',flat=True).distinct())

		acknowledged_announcements.extend(decode_cookie(request.COOKIES))
		announcements = announcements.exclude(Q(acknowledge=True)&Q(pk__in=acknowledged_announcements))

		request._announcements =  announcements
	def process_request(self, request):
		path = request.path
		if not path.startswith('/'):
			path = "/" + path

		acknowledged_announcements = []

		now = datetime.datetime.now()
		# Use timezone aware datetime.now() method for django>=1.4
		try:
			from django.utils.timezone import utc
			now = datetime.datetime.utcnow().replace(tzinfo=utc)
		except ImportError:
			pass

		announcements = amodels.Announcement.objects.filter(\
			Q(url__isnull=True)|Q(url__exact=path)).filter(\
			Q(start_time__isnull=True)|Q(start_time__lte=now)).filter(\
			Q(expire_time__isnull=True)|Q(expire_time__gte=now))

		if not request.user.is_authenticated():
			announcements = announcements.exclude(auth_only=True)
			acknowledged_announcements.extend(decode_cookie(request.COOKIES))

		else:
			use_auth = True

			for i in getattr(settings,"DATABASE_ROUTERS") or []:
				if "AnnouncementsRouter" in i:
					use_auth = False
					break

			if use_auth:
				announcements = announcements.exclude(auth_acknowledgments=request.user)
				acknowledged_announcements.extend(request.user.announcement_set.values_list('pk',flat=True).distinct())

		acknowledged_announcements.extend(decode_cookie(request.COOKIES))
		announcements = announcements.exclude(Q(acknowledge=True)&Q(pk__in=acknowledged_announcements))

		request._announcements =  announcements
def acknowledge(request,id,return_url=None):
	announcement = get_object_or_404(amodels.Announcement,pk=id)

	if request.user.is_authenticated():
		use_auth = True

		for i in getattr(settings,"DATABASE_ROUTERS") or []:
			if "AnnouncementsRouter" in i:
				use_auth = False
				break

		if use_auth:
			announcement.auth_acknowledgments.add(request.user)

	return_url = request.GET.get('return_url') or return_url or '/'
	response = redirect(return_url)

	cookie_acknowledgments = [str(i) for i in decode_cookie(request.COOKIES)]
	cookie_acknowledgments.append(str(announcement.pk))
	response.set_cookie(get_cookie_varname(),",".join(cookie_acknowledgments))
	return response