site reorg

1 files changed, 52 insertions, 0 deletions

diff --git a/app/lib/tagging/views.py b/app/lib/tagging/views.py
new file mode 100644
index 0000000..9e7e2f5
--- /dev/null
+++ b/app/lib/tagging/views.py
@@ -0,0 +1,52 @@
+"""
+Tagging related views.
+"""
+from django.http import Http404
+from django.utils.translation import ugettext as _
+from django.views.generic.list_detail import object_list
+
+from tagging.models import Tag, TaggedItem
+from tagging.utils import get_tag, get_queryset_and_model
+
+def tagged_object_list(request, queryset_or_model=None, tag=None,
+        related_tags=False, related_tag_counts=True, **kwargs):
+    """
+    A thin wrapper around
+    ``django.views.generic.list_detail.object_list`` which creates a
+    ``QuerySet`` containing instances of the given queryset or model
+    tagged with the given tag.
+
+    In addition to the context variables set up by ``object_list``, a
+    ``tag`` context variable will contain the ``Tag`` instance for the
+    tag.
+
+    If ``related_tags`` is ``True``, a ``related_tags`` context variable
+    will contain tags related to the given tag for the given model.
+    Additionally, if ``related_tag_counts`` is ``True``, each related
+    tag will have a ``count`` attribute indicating the number of items
+    which have it in addition to the given tag.
+    """
+    if queryset_or_model is None:
+        try:
+            queryset_or_model = kwargs.pop('queryset_or_model')
+        except KeyError:
+            raise AttributeError(_('tagged_object_list must be called with a queryset or a model.'))
+
+    if tag is None:
+        try:
+            tag = kwargs.pop('tag')
+        except KeyError:
+            raise AttributeError(_('tagged_object_list must be called with a tag.'))
+
+    tag_instance = get_tag(tag)
+    if tag_instance is None:
+        raise Http404(_('No Tag found matching "%s".') % tag)
+    queryset = TaggedItem.objects.get_by_model(queryset_or_model, tag_instance)
+    if not kwargs.has_key('extra_context'):
+        kwargs['extra_context'] = {}
+    kwargs['extra_context']['tag'] = tag_instance
+    if related_tags:
+        kwargs['extra_context']['related_tags'] = \
+            Tag.objects.related_for_model(tag_instance, queryset_or_model,
+                                          counts=related_tag_counts)
+    return object_list(request, queryset, **kwargs)