gnu-social/lib/popularnoticestream.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Stream of notices sorted by popularity
*
* PHP version 5
*
* 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 Popular
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Stream of notices sorted by popularity
*
* @category Popular
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class PopularNoticeStream extends ScopingNoticeStream
{
function __construct($profile=null)
{
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parent::__construct(new CachingNoticeStream(new RawPopularNoticeStream(),
'popular',
false),
$profile);
}
}
class RawPopularNoticeStream extends NoticeStream
{
function getNoticeIds($offset, $limit, $since_id, $max_id)
{
$weightexpr = common_sql_weight('modified', common_config('popular', 'dropoff'));
$cutoff = sprintf("modified > '%s'",
common_sql_date(time() - common_config('popular', 'cutoff')));
$fave = new Fave();
$fave->selectAdd();
$fave->selectAdd('notice_id');
$fave->selectAdd("$weightexpr as weight");
$fave->whereAdd($cutoff);
$fave->orderBy('weight DESC');
$fave->groupBy('notice_id');
if (!is_null($offset)) {
$fave->limit($offset, $limit);
}
// FIXME: $since_id, $max_id are ignored
$ids = array();
if ($fave->find()) {
while ($fave->fetch()) {
$ids[] = $fave->notice_id;
}
}
return $ids;
}
}