# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
+import logging
+from random import randint
from django import template
from django.core.urlresolvers import reverse
+from django.utils.cache import add_never_cache_headers
+import sorl.thumbnail.default
+from ssify import ssi_variable
from catalogue.utils import split_tags
from ..engine import CustomCroppingEngine
-import sorl.thumbnail.default
-import logging
+from ..models import Picture
+
register = template.Library()
sorl.thumbnail.default.engine = _engine
return th.url
+
+
+@ssi_variable(register, patch_response=[add_never_cache_headers])
+def picture_random_picture(request, exclude_ids, unless=None):
+ if unless:
+ return None
+ queryset = Picture.objects.exclude(pk__in=exclude_ids).exclude(image_file='')
+ count = queryset.count()
+ if count:
+ return queryset[randint(0, count - 1)].pk
+ else:
+ return None