catalogue view: cache vary on is_ajax

[wolnelektury.git] / apps / catalogue / views.py

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index 599fde1..e61feb6 100644 (file)
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -6,7 +6,9 @@ import re
 import itertools
 
 from django.conf import settings
+from django.core.cache import get_cache
 from django.template import RequestContext
+from django.template.loader import render_to_string
 from django.shortcuts import render_to_response, get_object_or_404, redirect
 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
 from django.core.urlresolvers import reverse
@@ -17,20 +19,23 @@ from django.utils.http import urlquote_plus
 from django.utils import translation
 from django.utils.translation import ugettext as _, ugettext_lazy
 from django.views.decorators.cache import never_cache
+from django.views.decorators.vary import vary_on_headers
 
 from ajaxable.utils import JSONResponse, AjaxableFormView
-
 from catalogue import models
 from catalogue import forms
 from catalogue.utils import split_tags, MultiQuerySet
+from catalogue.templatetags.catalogue_tags import tag_list, collection_list
 from pdcounter import models as pdcounter_models
 from pdcounter import views as pdcounter_views
 from suggest.forms import PublishingSuggestForm
 from picture.models import Picture
 
 staff_required = user_passes_test(lambda user: user.is_staff)
+permanent_cache = get_cache('permanent')
 
 
+@vary_on_headers('X-Requested-With')
 def catalogue(request):
     tags = models.Tag.objects.exclude(
         category__in=('set', 'book')).exclude(book_count=0)
@@ -39,33 +44,56 @@ def catalogue(request):
         tag.count = tag.book_count
     categories = split_tags(tags)
     fragment_tags = categories.get('theme', [])
-
-    return render_to_response('catalogue/catalogue.html', locals(),
-        context_instance=RequestContext(request))
+    collections = models.Collection.objects.all()
+
+    if request.is_ajax():
+        render_tag_list = lambda x: render_to_string(
+            'catalogue/tag_list.html', tag_list(x))
+        output = {'theme': render_tag_list(fragment_tags)}
+        for category, tags in categories.items():
+            output[category] = render_tag_list(tags)
+        output['collections'] = render_to_string(
+            'catalogue/collection_list.html', collection_list(collections))
+        return JSONResponse(output)
+    else:
+        return render_to_response('catalogue/catalogue.html', locals(),
+            context_instance=RequestContext(request))
 
 
 def book_list(request, filter=None, template_name='catalogue/book_list.html',
-        context=None):
+        nav_template_name='catalogue/snippets/book_list_nav.html',
+        list_template_name='catalogue/snippets/book_list.html',
+        cache_key='catalogue.book_list',
+        context=None,
+        ):
     """ generates a listing of all books, optionally filtered with a test function """
-
-    books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
-    books_nav = SortedDict()
-    for tag in books_by_author:
-        if books_by_author[tag]:
-            books_nav.setdefault(tag.sort_key[0], []).append(tag)
-
+    cached = permanent_cache.get(cache_key)
+    if cached is not None:
+        rendered_nav, rendered_book_list = cached
+    else:
+        books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
+        books_nav = SortedDict()
+        for tag in books_by_author:
+            if books_by_author[tag]:
+                books_nav.setdefault(tag.sort_key[0], []).append(tag)
+        rendered_nav = render_to_string(nav_template_name, locals())
+        rendered_book_list = render_to_string(list_template_name, locals())
+        permanent_cache.set(cache_key, (rendered_nav, rendered_book_list))
     return render_to_response(template_name, locals(),
         context_instance=RequestContext(request))
 
 
 def audiobook_list(request):
     return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
-                     template_name='catalogue/audiobook_list.html')
+                     template_name='catalogue/audiobook_list.html',
+                     list_template_name='catalogue/snippets/audiobook_list.html',
+                     cache_key='catalogue.audiobook_list')
 
 
 def daisy_list(request):
     return book_list(request, Q(media__type='daisy'),
-                     template_name='catalogue/daisy_list.html')
+                     template_name='catalogue/daisy_list.html',
+                     cache_key='catalogue.daisy_list')
 
 
 def collection(request, slug):
@@ -76,6 +104,7 @@ def collection(request, slug):
                 for slug in slugs]
     return book_list(request, Q(slug__in=slugs),
                      template_name='catalogue/collection.html',
+                     cache_key='catalogue.collection:%s' % coll.slug,
                      context={'collection': coll})
 
 
@@ -536,6 +565,11 @@ class CustomPDFFormView(AjaxableFormView):
     submit = ugettext_lazy('Download')
     honeypot = True
 
+    def __call__(self, *args, **kwargs):
+        if settings.NO_CUSTOM_PDF:
+            raise Http404('Custom PDF is disabled')
+        return super(CustomPDFFormView, self).__call__(*args, **kwargs)
+
     def form_args(self, request, obj):
         """Override to parse view args and give additional args to the form."""
         return (obj,), {}