mediagoblin/listings/views.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011 MediaGoblin contributors.  See AUTHORS.
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 from mediagoblin.db.util import DESCENDING
  18
  19 from mediagoblin.util import Pagination, render_to_response
  20 from mediagoblin.decorators import uses_pagination
  21
  22 from werkzeug.contrib.atom import AtomFeed
  23
  24
  25 def _get_tag_name_from_entries(media_entries, tag_slug):
  26     """
  27     Get a tag name from the first entry by looking it up via its slug.
  28     """
  29     # ... this is slightly hacky looking :\
  30     tag_name = tag_slug
  31     if media_entries.count():
  32         for tag in media_entries[0]['tags']:
  33             if tag['slug'] == tag_slug:
  34                 tag_name == tag['name']
  35                 break
  36
  37     return tag_name
  38
  39
  40 @uses_pagination
  41 def tag_listing(request, page):
  42     """'Gallery'/listing for this tag slug"""
  43     tag_slug = request.matchdict[u'tag']
  44
  45     cursor = request.db.MediaEntry.find(
  46         {u'state': u'processed',
  47          u'tags.slug': tag_slug})
  48     cursor = cursor.sort('created', DESCENDING)
  49
  50     pagination = Pagination(page, cursor)
  51     media_entries = pagination()
  52
  53     tag_name = _get_tag_name_from_entries(media_entries, tag_slug)
  54
  55     return render_to_response(
  56         request,
  57         'mediagoblin/listings/tag.html',
  58         {'tag_slug': tag_slug,
  59          'tag_name': tag_name,
  60          'media_entries': media_entries,
  61          'pagination': pagination})
  62
  63
  64 ATOM_DEFAULT_NR_OF_UPDATED_ITEMS = 15
  65
  66 def tag_atom_feed(request):
  67     """
  68     generates the atom feed with the tag images
  69     """
  70     tag_slug = request.matchdict[u'tag']
  71
  72     cursor = request.db.MediaEntry.find(
  73         {u'state': u'processed',
  74          u'tags.slug': tag_slug})
  75     cursor = cursor.sort('created', DESCENDING)
  76     cursor = cursor.limit(ATOM_DEFAULT_NR_OF_UPDATED_ITEMS)
  77
  78     feed = AtomFeed(
  79         "MediaGoblin: Feed for tag '%s'" % tag_slug,
  80         feed_url=request.url,
  81         url=request.host_url)
  82
  83     for entry in cursor:
  84         feed.add(entry.get('title'),
  85             entry.get('description_html'),
  86             content_type='html',
  87             author=entry.uploader()['username'],
  88             updated=entry.get('created'),
  89             url=entry.url_for_self(request.urlgen))
  90
  91     return feed.get_response()