--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/comments/views/karma.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,32 @@
+from django.http import Http404
+from django.shortcuts import render_to_response
+from django.template import RequestContext
+from django.contrib.comments.models import Comment, KarmaScore
+from django.utils.translation import ugettext as _
+
+def vote(request, comment_id, vote, extra_context=None, context_processors=None):
+    """
+    Rate a comment (+1 or -1)
+
+    Templates: `karma_vote_accepted`
+    Context:
+        comment
+            `comments.comments` object being rated
+    """
+    if extra_context is None: extra_context = {}
+    rating = {'up': 1, 'down': -1}.get(vote, False)
+    if not rating:
+        raise Http404, "Invalid vote"
+    if not request.user.is_authenticated():
+        raise Http404, _("Anonymous users cannot vote")
+    try:
+        comment = Comment.objects.get(pk=comment_id)
+    except Comment.DoesNotExist:
+        raise Http404, _("Invalid comment ID")
+    if comment.user.id == request.user.id:
+        raise Http404, _("No voting for yourself")
+    KarmaScore.objects.vote(request.user.id, comment_id, rating)
+    # Reload comment to ensure we have up to date karma count
+    comment = Comment.objects.get(pk=comment_id)
+    return render_to_response('comments/karma_vote_accepted.html', {'comment': comment},
+        context_instance=RequestContext(request, extra_context, context_processors))