gnu-social/lib/tagnoticestream.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Stream of notices with a given tag
*
* 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);
}
/**
* Stream of notices with a given tag
*
* @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 TagNoticeStream extends ScopingNoticeStream
{
function __construct($tag)
{
parent::__construct(new CachingNoticeStream(new RawTagNoticeStream($tag),
'notice_tag:notice_ids:' . Cache::keyize($tag)));
}
}
/**
* Raw stream of notices with a given tag
*
* @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 RawTagNoticeStream extends NoticeStream
{
protected $tag;
function __construct($tag)
{
$this->tag = $tag;
}
function getNoticeIds($offset, $limit, $since_id, $max_id)
{
$nt = new Notice_tag();
$nt->tag = $this->tag;
$nt->selectAdd();
$nt->selectAdd('notice_id');
Notice::addWhereSinceId($nt, $since_id, 'notice_id');
Notice::addWhereMaxId($nt, $max_id, 'notice_id');
$nt->orderBy('created DESC, notice_id DESC');
if (!is_null($offset)) {
$nt->limit($offset, $limit);
}
$ids = array();
if ($nt->find()) {
while ($nt->fetch()) {
$ids[] = $nt->notice_id;
}
}
return $ids;
}
}