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<?php
/**
* ownCloud - News app
*
* @author Alessandro Cosentino
* @author Bernhard Posselt
* @copyright 2012 Alessandro Cosentino cosenal@gmail.com
* @copyright 2012 Bernhard Posselt dev@bernhard-posselt.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\News\Db\Postgres;
use \OCA\AppFramework\Db\DoesNotExistException;
use \OCA\AppFramework\Db\MultipleObjectsReturnedException;
use \OCA\AppFramework\Db\Mapper;
use \OCA\AppFramework\Core\API;
use \OCA\News\Db\StatusFlag;
class ItemMapper extends \OCA\News\Db\ItemMapper {
public function __construct(API $api){
parent::__construct($api);
}
/**
* Delete all items for feeds that have over $threshold unread and not
* starred items
*/
public function deleteReadOlderThanThreshold($threshold){
$status = StatusFlag::STARRED | StatusFlag::UNREAD;
$sql = 'SELECT COUNT(*) - `feeds`.`articles_per_update` AS `size`, ' .
'`items`.`feed_id` AS `feed_id` ' .
'FROM `*PREFIX*news_items` `items` ' .
'JOIN `*PREFIX*news_feeds` `feeds` ' .
'ON `feeds`.`id` = `items`.`feed_id` ' .
'WHERE NOT ((`items`.`status` & ?) > 0) ' .
'GROUP BY `items`.`feed_id`, `feeds`.`articles_per_update` ' .
'HAVING COUNT(*) > ?';
$params = array($status, $threshold);
$result = $this->execute($sql, $params);
while($row = $result->fetchRow()) {
$size = (int) $row['size'];
$limit = $size - $threshold;
if($limit > 0) {
$params = array($status, $row['feed_id'], $limit);
$sql = 'DELETE FROM `*PREFIX*news_items` ' .
'WHERE `id` IN (' .
'SELECT `id` FROM `*PREFIX*news_items` ' .
'WHERE NOT ((`status` & ?) > 0) ' .
'AND `feed_id` = ? ' .
'ORDER BY `id` ASC ' .
'LIMIT ?' .
')';
$this->execute($sql, $params);
}
}
}
}
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