gnu-social/lib/filenoticestream.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Stream of notices that reference an URL
*
* 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 Stream
* @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);
}
class FileNoticeStream extends ScopingNoticeStream
{
function __construct($file, $profile = -1)
{
if (is_int($profile) && $profile == -1) {
$profile = Profile::current();
}
parent::__construct(new CachingNoticeStream(new RawFileNoticeStream($file),
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'file:notice-ids:'.$file->id),
$profile);
}
}
/**
* Raw stream for a file
*
* @category Stream
* @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 RawFileNoticeStream extends NoticeStream
{
protected $file = null;
function __construct($file)
{
$this->file = $file;
}
/**
* Stream of notices linking to this URL
*
* @param integer $offset Offset to show; default is 0
* @param integer $limit Limit of notices to show
* @param integer $since_id Since this notice
* @param integer $max_id Before this notice
*
* @return array ids of notices that link to this file
*/
function getNoticeIds($offset, $limit, $since_id, $max_id)
{
$f2p = new File_to_post();
$f2p->selectAdd();
$f2p->selectAdd('post_id');
$f2p->file_id = $this->file->id;
Notice::addWhereSinceId($f2p, $since_id, 'post_id', 'modified');
Notice::addWhereMaxId($f2p, $max_id, 'post_id', 'modified');
$f2p->orderBy('modified DESC, post_id DESC');
if (!is_null($offset)) {
$f2p->limit($offset, $limit);
}
$ids = array();
if ($f2p->find()) {
while ($f2p->fetch()) {
$ids[] = $f2p->post_id;
}
}
return $ids;
}
}