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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Base class for sections showing lists of notices
*
* PHP version 5
*
* LICENCE: 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/>.
*
* @category Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Base class for sections showing lists of notices
*
* These are the widgets that show interesting data about a person
* group, or site.
*
* @category Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class PopularNoticeSection extends NoticeSection
{
function getNotices()
{
if (common_config('db', 'type') == 'pgsql') {
$weightexpr='sum(exp(-extract(epoch from (now() - fave.modified)) / %s))';
} else {
$weightexpr='sum(exp(-(now() - fave.modified) / %s))';
}
$qry = 'SELECT notice.*, '.
$weightexpr . ' as weight ' .
'FROM notice JOIN fave ON notice.id = fave.notice_id ' .
'GROUP BY notice.id,notice.profile_id,notice.content,notice.uri,' .
'notice.rendered,notice.url,notice.created,notice.modified,' .
'notice.reply_to,notice.is_local,notice.source ' .
'ORDER BY weight DESC';
$offset = 0;
$limit = NOTICES_PER_SECTION + 1;
if (common_config('db', 'type') == 'pgsql') {
$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
} else {
$qry .= ' LIMIT ' . $offset . ', ' . $limit;
}
$notice = Memcached_DataObject::cachedQuery('Notice',
sprintf($qry, common_config('popular', 'dropoff')),
1200);
return $notice;
}
function title()
{
return _('Popular notices');
}
function divId()
{
return 'popular_notices';
}
function moreUrl()
{
return common_local_url('favorited');
}
}
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