Cite/banner/carousel change.

[wolnelektury.git] / src / social / templatetags / social_tags.py

diff --git a/src/social/templatetags/social_tags.py b/src/social/templatetags/social_tags.py
index 8f67bdf..a444d66 100644 (file)
--- a/src/social/templatetags/social_tags.py
+++ b/src/social/templatetags/social_tags.py
@@ -9,7 +9,7 @@ from catalogue.models import Book
 from ssify import ssi_variable
 from ssify.utils import ssi_vary_on_cookie
 from social.utils import likes, get_or_choose_cite
-from ..models import Carousel
+from ..models import Carousel, Cite
 
 register = template.Library()
 
@@ -50,16 +50,42 @@ def book_shelf_tags(request, book_id):
     return lazy(get_value, str)()
 
 
-@register.inclusion_tag('social/carousel.html')
-def carousel(slug):
+@register.inclusion_tag('social/carousel.html', takes_context=True)
+def carousel(context, slug):
     # TODO: cache
     try:
         carousel = Carousel.objects.get(slug=slug)
     except Carousel.DoesNotExist:
         # TODO: add sanity check for install.
         carousel = None
+    banners = [
+            item.get_banner()
+            for item in carousel.carouselitem_set.all()
+            ]
+
+    request = context['request']
+    if 'banner' in request.GET:
+        try:
+            banner_id = int(request.GET['banner'])
+        except (TypeError, ValueError):
+            pass
+        else:
+            try:
+                index = [b.pk for b in banners].index(banner_id)
+            except ValueError:
+                if request.user.is_staff:
+                    # Staff is allowed to preview any banner.
+                    try:
+                        banners.insert(0, Cite.objects.get(pk=banner_id))
+                    except Cite.DoesNotExist:
+                        pass
+            else:
+                # Put selected banner to front.
+                banners = [banners[index]] + banners[:index] + banners[index+1:]
+
     return {
-        'carousel': carousel
+        'carousel': carousel,
+        'banners': banners,
     }