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<?php
/**
* ownCloud - News
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Alessandro Cosentino <cosenal@gmail.com>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @copyright Alessandro Cosentino 2012
* @copyright Bernhard Posselt 2012, 2014
*/
namespace OCA\News\Db\Postgres;
use \OCA\News\Core\Db;
use \OCA\News\Db\DoesNotExistException;
use \OCA\News\Db\MultipleObjectsReturnedException;
use \OCA\News\Db\Mapper;
use \OCA\News\Db\StatusFlag;
class ItemMapper extends \OCA\News\Db\ItemMapper {
public function __construct(Db $db){
parent::__construct($db, 'news_items', '\OCA\News\Db\Item');
}
/**
* 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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