Services/MetaData/classes/class.ilMDOrComposite.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 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 'class.ilMDBase.php';
include_once 'Services/MetaData/classes/class.ilMDRequirement.php';

class ilMDOrComposite extends ilMDRequirement
{
        function ilMDOrComposite($a_rbac_id = 0,$a_obj_id = 0,$a_obj_type = '')
        {
                parent::ilMDRequirement($a_rbac_id,
                                                                $a_obj_id,
                                                                $a_obj_type);
        }

        // SET/GET
        function setOrCompositeId($a_or_composite_id)
        {
                $this->or_composite_id = (int) $a_or_composite_id;
        }
        function getOrCompositeId()
        {
                if(!$this->or_composite_id)
                {
                        $query = "SELECT MAX(or_composite_id) AS orc FROM il_meta_requirement ".
                                "WHERE rbac_id = '".$this->getRBACId()."' ".
                                "AND obj_id = '".$this->getObjId()."' ".
                                "GROUP BY or_composite_id";

                        $res = $this->db->query($query);
                        while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                        {
                                $this->or_composite_id = $row->orc;
                        }
                        ++$this->or_composite_id;
                }
                return $this->or_composite_id;
        }

        function &getRequirementIds()
        {
                include_once 'Services/MetaData/classes/class.ilMDRequirement.php';

                return ilMDRequirement::_getIds($this->getRBACId(),
                                                                                $this->getObjId(),
                                                                                $this->getParentId(),
                                                                                'meta_technical',
                                                                                $this->getOrCompositeId());
        }

        function &getRequirement($a_requirement_id)
        {
                include_once 'Services/MetaData/classes/class.ilMDRequirement.php';

                if(!$a_requirement_id)
                {
                        return false;
                }
                $req =& new ilMDRequirement();
                $req->setMetaId($a_requirement_id);

                return $req;
        }

        function &addRequirement()
        {
                include_once 'Services/MetaData/classes/class.ilMDRequirement.php';

                $req =& new ilMDRequirement($this->getRBACId(),$this->getObjId(),$this->getObjType());
                $req->setParentId($this->getParentId());
                $req->setParentType('meta_technical');
                $req->setOrCompositeId($this->getOrCompositeId());

                return $req;
        }

        /*
         * Overwritten save method, to get new or_composite_id
         * 
         */
        function save()
        {
                echo 'Use ilMDOrcomposite::addRequirement()';
        }

        function delete()
        {
                foreach($this->getRequirementIds() as $id)
                {
                        $req = $this->getRequirement($id);
                        $req->delete();
                }
                return true;
        }
                                
        /*
         * XML Export of all meta data
         * @param object (xml writer) see class.ilMD2XML.php
         * 
         */
        function toXML(&$writer)
        {
                // For all requirements
                $writer->xmlStartTag('OrComposite');

                $reqs = $this->getRequirementIds();
                foreach($reqs as $id)
                {
                        $req = $this->getRequirement($id);
                        $req->toXML($writer);
                }
                if(!count($reqs))
                {
                        include_once 'Services/MetaData/classes/class.ilMDRequirement.php';
                        $req = new ilMDRequirement($this->getRBACId(),$this->getObjId());
                        $req->toXML($writer);
                }
                $writer->xmlEndTag('OrComposite');
                
        }


        // STATIC
        function _getIds($a_rbac_id,$a_obj_id,$a_parent_id,$a_parent_type)
        {
                global $ilDB;

                $query = "SELECT DISTINCT(or_composite_id) AS or_composite_id FROM il_meta_requirement ".
                        "WHERE rbac_id = '".$a_rbac_id."' ".
                        "AND obj_id = '".$a_obj_id."' ".
                        "AND parent_id = '".$a_parent_id."' ".
                        "AND parent_type = '".$a_parent_type."' ".
                        "AND or_composite_id > 0 ";

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $ids[] = $row->or_composite_id;
                }
                return $ids ? $ids : array();
        }
}
?>