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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from mediagoblin import mg_globals
from mediagoblin.db.models import MediaEntry
from mediagoblin.db.util import media_entries_for_tag_slug
from mediagoblin.decorators import uses_pagination
from mediagoblin.plugins.api.tools import get_media_file_paths
from mediagoblin.tools.pagination import Pagination
from mediagoblin.tools.response import render_to_response
from mediagoblin.tools.translate import pass_to_ugettext as _
from werkzeug.contrib.atom import AtomFeed
def _get_tag_name_from_entries(media_entries, tag_slug):
"""
Get a tag name from the first entry by looking it up via its slug.
"""
# ... this is slightly hacky looking :\
tag_name = tag_slug
for entry in media_entries:
for tag in entry.tags:
if tag['slug'] == tag_slug:
tag_name = tag['name']
break
break
return tag_name
@uses_pagination
def tag_listing(request, page):
"""'Gallery'/listing for this tag slug"""
tag_slug = request.matchdict['tag']
cursor = media_entries_for_tag_slug(request.db, tag_slug)
cursor = cursor.order_by(MediaEntry.created.desc())
pagination = Pagination(page, cursor)
media_entries = pagination()
tag_name = _get_tag_name_from_entries(media_entries, tag_slug)
return render_to_response(
request,
'mediagoblin/listings/tag.html',
{'tag_slug': tag_slug,
'tag_name': tag_name,
'media_entries': media_entries,
'pagination': pagination})
ATOM_DEFAULT_NR_OF_UPDATED_ITEMS = 15
def atom_feed(request):
"""
generates the atom feed with the tag images
"""
tag_slug = request.matchdict.get('tag')
feed_title = "MediaGoblin Feed"
if tag_slug:
feed_title += " for tag '%s'" % tag_slug
link = request.urlgen('mediagoblin.listings.tags_listing',
qualified=True, tag=tag_slug )
cursor = media_entries_for_tag_slug(request.db, tag_slug)
else: # all recent item feed
feed_title += " for all recent items"
link = request.urlgen('index', qualified=True)
cursor = MediaEntry.query.filter_by(state='processed')
cursor = cursor.order_by(MediaEntry.created.desc())
cursor = cursor.limit(ATOM_DEFAULT_NR_OF_UPDATED_ITEMS)
"""
ATOM feed id is a tag URI (see http://en.wikipedia.org/wiki/Tag_URI)
"""
atomlinks = [{
'href': link,
'rel': 'alternate',
'type': 'text/html'}]
if mg_globals.app_config["push_urls"]:
for push_url in mg_globals.app_config["push_urls"]:
atomlinks.append({
'rel': 'hub',
'href': push_url})
feed = AtomFeed(
feed_title,
feed_url=request.url,
id=link,
links=atomlinks)
for entry in cursor:
# Include a thumbnail image in content.
file_urls = get_media_file_paths(entry.media_files, request.urlgen)
if 'thumb' in file_urls:
content = '<img src="{thumb}" alt='' /> {desc}'.format(
thumb=file_urls['thumb'], desc=entry.description_html)
else:
content = entry.description_html
feed.add(
# AtomFeed requires a non-blank title. This situation can occur if
# you edit a media item and blank out the existing title.
entry.get('title') or _('Untitled'),
content,
id=entry.url_for_self(request.urlgen, qualified=True),
content_type='html',
author={
'name': entry.get_actor.username,
'uri': request.urlgen(
'mediagoblin.user_pages.user_home',
qualified=True,
user=entry.get_actor.username)},
updated=entry.get('created'),
links=[{
'href': entry.url_for_self(
request.urlgen,
qualified=True),
'rel': 'alternate',
'type': 'text/html'}])
return feed.get_response()
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