X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/ee24ab2feac614a0bdc7114e8e2b4b4d0ad44395..6523713debf3076d8bac93e3262bc589faee286d:/contrib/penfield/utils.py

diff --git a/contrib/penfield/utils.py b/contrib/penfield/utils.py
index 5df800c..7b5e946 100644
--- a/contrib/penfield/utils.py
+++ b/contrib/penfield/utils.py
@@ -1,20 +1,81 @@
-from django.core.paginator import Paginator, InvalidPage, EmptyPage
+from django.utils.feedgenerator import Atom1Feed, Rss201rev2Feed
+from django.conf.urls.defaults import url, patterns
+from django.core.urlresolvers import reverse
+from django.http import HttpResponse
 
 
-def paginate(request, entries, entries_per_page):
-	paginator = Paginator(entries, entries_per_page)
-	try:
-		page_number = int(request.GET.get('page', '1'))
-		entries = paginator.page(page_number).object_list
-		page = paginator.page(page_number)
-	except ValueError:
-		page_number = 1
-		entries = paginator.page(page_number).object_list
-		page = paginator.page(page_number)
-	try:
-		entries = paginator.page(page_number).object_list
-		page = paginator.page(page_number)
-	except (EmptyPage, InvalidPage):
-		entries = paginator.page(paginator.num_pages).object_list
-		page = paginator.page(page_number)
-	return page
\ No newline at end of file
+class FeedMultiViewMixin(object):
+	"""
+	This mixin provides common methods for adding feeds to multiviews. In order to use this mixin,
+	the multiview must define feed_title (probably as properties that return values
+	on related objects.) feed_description may also be defined; it defaults to an empty string.
+	"""
+	feed_suffix = 'feed'
+	feeds_enabled = True
+	atom_feed = Atom1Feed
+	rss_feed = Rss201rev2Feed
+	feed_description = ''
+	
+	def page_view(self, func, page, list_var='entries'):
+		"""
+		Wraps an object-fetching function and renders the results as a page.
+		"""
+		def inner(request, node=None, extra_context=None, **kwargs):
+			objects, extra_context = func(request=request, node=node, extra_context=extra_context, **kwargs)
+
+			context = self.get_context()
+			context.update(extra_context or {})
+
+			if 'page' in kwargs or 'page' in request.GET:
+				page_num = kwargs.get('page', request.GET.get('page', 1))
+				paginator, paginated_page, objects = paginate(objects, self.per_page, page_num)
+				context.update({'paginator': paginator, 'paginated_page': paginated_page, list_var: objects})
+			else:
+				context.update({list_var: objects})
+
+			return page.render_to_response(node, request, extra_context=context)
+
+		return inner
+	
+	def feed_view(self, func, reverse_name):
+		"""
+		Wraps an object-fetching function and renders the results as a rss or atom feed.
+		"""
+		def inner(request, node=None, extra_context=None, **kwargs):
+			objects, extra_context = func(request=request, node=node, extra_context=extra_context, **kwargs)
+	
+			if 'HTTP_ACCEPT' in request.META and 'rss' in request.META['HTTP_ACCEPT'] and 'atom' not in request.META['HTTP_ACCEPT']:
+				feed_type = 'rss'
+			else:
+				feed_type = 'atom'
+			
+			feed = self.get_feed(feed_type, request, node, kwargs, reverse_name)
+			
+			for obj in objects:
+				feed.add_item(obj.title, '/%s/%s/' % (node.get_absolute_url().strip('/'), self.get_subpath(obj).strip('/')), description=self.get_obj_description(obj))
+	
+			response = HttpResponse(mimetype=feed.mime_type)
+			feed.write(response, 'utf-8')
+			return response
+
+		return inner
+	
+	def get_feed(self, feed_type, request, node, kwargs, reverse_name):
+		title = self.feed_title
+		link = '/%s/%s/' % (node.get_absolute_url().strip('/'), reverse(reverse_name, urlconf=self, kwargs=kwargs).strip('/'))
+		description = self.feed_description
+		if feed_type == 'rss':
+			return self.rss_feed(title, link, description)
+		
+		return self.atom_feed(title, link, description, subtitle=description)
+	
+	def feed_patterns(self, object_fetcher, page, base_name):
+		feed_name = '%s_feed' % base_name
+		urlpatterns = patterns('',
+			url(r'^%s/$' % self.feed_suffix, self.feed_view(object_fetcher, feed_name), name=feed_name),
+			url(r'^$', self.page_view(object_fetcher, page), name=base_name)
+		)
+		return urlpatterns
+	
+	def get_obj_description(self, obj):
+		raise NotImplementedError
\ No newline at end of file