tagnoticestream.php 3.48 KB
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<?php
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/**
 * 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/
 */
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if (!defined('GNUSOCIAL')) { exit(1); }
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/**
 * 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
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{
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    function __construct($tag, $profile = -1)
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    {
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        if (is_int($profile) && $profile == -1) {
            $profile = Profile::current();
        }
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        parent::__construct(new CachingNoticeStream(new RawTagNoticeStream($tag),
                                                    'notice_tag:notice_ids:' . Cache::keyize($tag)));
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    }
}

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/**
 * 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/
 */

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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');

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        if (!empty($this->selectVerbs)) {
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            $nt->joinAdd(array('notice_id', 'notice:id'));

            $filter = array_keys(array_filter($this->selectVerbs));
            if (!empty($filter)) {
                // include verbs in selectVerbs with values that equate to true
                $nt->whereAddIn('notice.verb', $filter, 'string');
            }

            $filter = array_keys(array_filter($this->selectVerbs, function ($v) { return !$v; }));
            if (!empty($filter)) {
                // exclude verbs in selectVerbs with values that equate to false
                $nt->whereAddIn('!notice.verb', $filter, 'string');
            }
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        }

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        $nt->orderBy('notice.created DESC, notice_id DESC');
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        if (!is_null($offset)) {
            $nt->limit($offset, $limit);
        }

        $ids = array();

        if ($nt->find()) {
            while ($nt->fetch()) {
                $ids[] = $nt->notice_id;
            }
        }

        return $ids;
    }
}