from django.conf import settings

from django.contrib.syndication.feeds import Feed

from django.contrib.sites.models import Site

from django.contrib import comments

class LatestCommentFeed(Feed):

    """Feed of latest comments on the current site."""

    def title(self):

        if not hasattr(self, '_site'):

            self._site = Site.objects.get_current()

        return u"%s comments" % self._site.name

    def link(self):

        if not hasattr(self, '_site'):

            self._site = Site.objects.get_current()

        return "http://%s/" % (self._site.domain)

    def description(self):

        if not hasattr(self, '_site'):

            self._site = Site.objects.get_current()

        return u"Latest comments on %s" % self._site.name

    def items(self):

        qs = comments.get_model().objects.filter(

            site__pk = settings.SITE_ID,

            is_public = True,

            is_removed = False,

        )

        if getattr(settings, 'COMMENTS_BANNED_USERS_GROUP', None):

            where = ['user_id NOT IN (SELECT user_id FROM auth_user_groups WHERE group_id = %s)']

            params = [settings.COMMENTS_BANNED_USERS_GROUP]

            qs = qs.extra(where=where, params=params)

        return qs.order_by('-submit_date')[:40]

    def item_pubdate(self, item):

        return item.submit_date