+from django.contrib.sites.models import Site
+from philo.models import Node
+
+
+class LazyNode(object):
+ def __get__(self, request, obj_type=None):
+ if not hasattr(request, '_cached_node_path'):
+ return None
+
+ if not hasattr(request, '_found_node'):
+ try:
+ current_site = Site.objects.get_current()
+ except Site.DoesNotExist:
+ current_site = None
+
+ try:
+ node, subpath = Node.objects.get_with_path(request._cached_node_path, root=getattr(current_site, 'root_node', None), absolute_result=False)
+ except Node.DoesNotExist:
+ node = None
+
+ if node:
+ node.subpath = subpath
+
+ request._found_node = node
+
+ return request._found_node
+
+
+class RequestNodeMiddleware(object):
+ """Middleware to process the request's path and attach the closest ancestor node."""
+ def process_request(self, request):
+ request.__class__.node = LazyNode()
+
+ def process_view(self, request, view_func, view_args, view_kwargs):
+ request._cached_node_path = view_kwargs.get('path', '/')
\ No newline at end of file