gnu-social/lib/threadingnoticestream.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Notice stream that's good for threading lists
*
* 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 Notice 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);
}
/**
* This notice stream filters notices by whether their conversation
* has been seen before. It's a good (well, OK) way to get streams
* for a ThreadedNoticeList display.
*
* @category Notice 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 ThreadingNoticeStream extends FilteringNoticeStream
{
protected $seen = array();
function getNotices($offset, $limit, $sinceId=null, $maxId=null)
{
// Clear this each time we're called
$this->seen = array();
return parent::getNotices($offset, $limit, $sinceId, $maxId);
}
function filter($notice)
{
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if (!array_key_exists($notice->conversation, $this->seen)) {
$this->seen[$notice->conversation] = true;
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return true;
} else {
return false;
}
}
}