mediagoblin/listings/views.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011, 2012 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 import mg_globals
  18 from mediagoblin.db.models import MediaEntry
  19 from mediagoblin.db.util import media_entries_for_tag_slug
  20 from mediagoblin.tools.pagination import Pagination
  21 from mediagoblin.tools.response import render_to_response
  22 from mediagoblin.decorators import uses_pagination
  23
  24 from werkzeug.contrib.atom import AtomFeed
  25
  26
  27 def _get_tag_name_from_entries(media_entries, tag_slug):
  28     """
  29     Get a tag name from the first entry by looking it up via its slug.
  30     """
  31     # ... this is slightly hacky looking :\
  32     tag_name = tag_slug
  33
  34     for entry in media_entries:
  35         for tag in entry.tags:
  36             if tag['slug'] == tag_slug:
  37                 tag_name = tag['name']
  38                 break
  39         break
  40     return tag_name
  41
  42
  43 @uses_pagination
  44 def tag_listing(request, page):
  45     """'Gallery'/listing for this tag slug"""
  46     tag_slug = request.matchdict[u'tag']
  47
  48     cursor = media_entries_for_tag_slug(request.db, tag_slug)
  49     cursor = cursor.order_by(MediaEntry.created.desc())
  50
  51     pagination = Pagination(page, cursor)
  52     media_entries = pagination()
  53
  54     tag_name = _get_tag_name_from_entries(media_entries, tag_slug)
  55
  56     return render_to_response(
  57         request,
  58         'mediagoblin/listings/tag.html',
  59         {'tag_slug': tag_slug,
  60          'tag_name': tag_name,
  61          'media_entries': media_entries,
  62          'pagination': pagination})
  63
  64
  65 ATOM_DEFAULT_NR_OF_UPDATED_ITEMS = 15
  66
  67
  68 def atom_feed(request):
  69     """
  70     generates the atom feed with the tag images
  71     """
  72     tag_slug = request.matchdict.get(u'tag')
  73     feed_title = "MediaGoblin Feed"
  74     if tag_slug:
  75         cursor = media_entries_for_tag_slug(request.db, tag_slug)
  76         link = request.urlgen('mediagoblin.listings.tags_listing',
  77                               qualified=True, tag=tag_slug )
  78         feed_title += "for tag '%s'" % tag_slug
  79     else: # all recent item feed
  80         cursor = MediaEntry.query.filter_by(state=u'processed')
  81         link = request.urlgen('index', qualified=True)
  82         feed_title += "for all recent items"
  83
  84     atomlinks = [
  85         {'href': link,
  86          'rel': 'alternate',
  87          'type': 'text/html'}]
  88
  89     if mg_globals.app_config["push_urls"]:
  90         for push_url in mg_globals.app_config["push_urls"]:
  91             atomlinks.append({
  92                 'rel': 'hub',
  93                 'href': push_url})
  94
  95     cursor = cursor.order_by(MediaEntry.created.desc())
  96     cursor = cursor.limit(ATOM_DEFAULT_NR_OF_UPDATED_ITEMS)
  97
  98     feed = AtomFeed(
  99         feed_title,
 100         feed_url=request.url,
 101         id=link,
 102         links=atomlinks)
 103
 104     for entry in cursor:
 105         feed.add(entry.get('title'),
 106             entry.description_html,
 107             id=entry.url_for_self(request.urlgen,qualified=True),
 108             content_type='html',
 109             author={'name': entry.get_uploader.username,
 110                 'uri': request.urlgen(
 111                     'mediagoblin.user_pages.user_home',
 112                     qualified=True, user=entry.get_uploader.username)},
 113             updated=entry.get('created'),
 114             links=[{
 115                 'href':entry.url_for_self(
 116                    request.urlgen,
 117                    qualified=True),
 118                 'rel': 'alternate',
 119                 'type': 'text/html'}])
 120
 121     return feed.get_response()