class.ilAdvancedMDValues.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. |
        +-----------------------------------------------------------------------------+
*/

class ilAdvancedMDValues
{
        private static $cached_values = array();

        public static function _getValuesByObjId($a_obj_id)
        {
                global $ilDB;
                
                if(isset(self::$cached_values[$a_obj_id]))
                {
                        return self::$cached_values[$a_obj_id];
                }
                $query = "SELECT field_id,value FROM adv_md_values ".
                        "WHERE obj_id = ".$ilDB->quote($a_obj_id);
                $res = $ilDB->query($query);
                
                self::$cached_values[$a_obj_id] = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        self::$cached_values[$a_obj_id][$row->field_id] = $row->value;
                }
                return self::$cached_values[$a_obj_id];
        }
        
        public static function _cloneValues($a_source_id,$a_target_id)
        {
                global $ilLog;
                
                include_once('./Services/AdvancedMetaData/classes/class.ilAdvancedMDFieldDefinition.php');
                include_once('./Services/AdvancedMetaData/classes/class.ilAdvancedMDValue.php');
                
                
                if(!count($defs = ilAdvancedMDFieldDefinition::_getActiveDefinitionsByObjType(ilObject::_lookupType($a_source_id))))
                {
                        $ilLog->write(__METHOD__.': No advanced meta data found.');
                        return true;
                }
                
                $ilLog->write(__METHOD__.': Start cloning advanced meta data.');
                
                foreach(self::_getValuesByObjId($a_source_id) as $field_id => $value)
                {
                        if(!in_array($field_id,$defs))
                        {
                                continue;
                        }
                        $new_value = new ilAdvancedMDValue($field_id,$a_target_id);
                        $new_value->setValue($value);
                        $new_value->save();
                        
                }
                return true;            
        }
        
        public static function _appendXMLByObjId(ilXmlWriter $xml_writer,$a_obj_id)
        {
                global $ilDB;
                
                $type = ilObject::_lookupType($a_obj_id);

                // Get active field_definitions
                $query = "SELECT field_id FROM adv_md_record AS amr ".
                        "JOIN adv_md_record_objs AS amro ON amr.record_id = amro.record_id ".
                        "JOIN adv_md_field_definition AS amfd ON amr.record_id = amfd.record_id ".
                        "WHERE active = 1 ".
                        "AND obj_type = ".$ilDB->quote($type)." ";
                        
                $xml_writer->xmlStartTag('AdvancedMetaData');   
                
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        include_once('Services/AdvancedMetaData/classes/class.ilAdvancedMDValue.php');
                        $value = ilAdvancedMDValue::_getInstance($a_obj_id,$row->field_id);
                        $value->appendXML($xml_writer);
                }
                $xml_writer->xmlEndTag('AdvancedMetaData');     
        }
        
        public static function _preloadValuesByObjIds($obj_ids)
        {
                global $ilDB;
                
                $query = "SELECT obj_id,field_id,value FROM adv_md_values ".
                        "WHERE obj_id IN (".implode("','",$obj_ids).")";
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        self::$cached_values[$row->obj_id][$row->field_id] = $row->value;
                }
                return true;
        }
        
        public static function _deleteByFieldId($a_field_id)
        {
                global $ilDB;
                
                $query = "DELETE FROM adv_md_values ".
                        "WHERE field_id = ".$ilDB->quote($a_field_id)." ";
                $ilDB->query($query);   
        }
        
        public static function _deleteByObjId($a_obj_id)
        {
                global $ilDB;
                
                $query = "DELETE FROM adv_md_values ".
                        "WHERE obj_id = ".$ilDB->quote($a_obj_id)." ";
                $ilDB->query($query);
        }
}
?>