class.ilContainerReferenceAccess.php

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<?php
/*
    +-----------------------------------------------------------------------------+
    | ILIAS open source                                                           |
    +-----------------------------------------------------------------------------+
    | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
    |                                                                             |
    | This program is free software; you can redistribute it and/or               |
    | modify it under the terms of the GNU General Public License                 |
    | as published by the Free Software Foundation; either version 2              |
    | 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 General Public License for more details.                                |
    |                                                                             |
    | You should have received a copy of the GNU General Public License           |
    | along with this program; if not, write to the Free Software                 |
    | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
    +-----------------------------------------------------------------------------+
*/

include_once('./Services/Object/classes/class.ilObjectAccess.php');

class ilContainerReferenceAccess extends ilObjectAccess
{
    public function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
    {
        return true;
    }
    
    public static function _isAccessible($a_ref_id)
    {
        global $DIC;

        $ilDB = $DIC->database();
        $tree = $DIC->repositoryTree();
        $access = $DIC->access();
        
        $obj_id = ilObject::_lookupObjId($a_ref_id);
        $query = "SELECT target_obj_id FROM container_reference " .
            "WHERE obj_id = " . $ilDB->quote($obj_id, 'integer') . " ";
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $target_id = $row->target_obj_id;
        }
        $target_ref_ids = ilObject::_getAllReferences($target_id);
        $target_ref_id = current($target_ref_ids);
        return
            !$tree->isDeleted($target_ref_id) &&
            $access->checkAccess('read', '', $target_ref_id);
    }
}