class.ilAdvancedMDValue.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 ilAdvancedMDValue
{
        private static $instances = array();
        
        protected $db;
        
        private $obj_id;
        private $field_id;
        private $value;
        private $disabled = false;

        public function __construct($a_field_id,$a_obj_id = 0)
        {
                global $ilDB;
                
                $this->db = $ilDB;
                
                $this->obj_id = $a_obj_id;
                $this->field_id = $a_field_id;
                
                $this->read();
        }
        
        public static function _getInstance($a_obj_id,$a_field_id)
        {
                if(isset(self::$instances[$a_obj_id][$a_field_id]))
                {
                        return self::$instances[$a_obj_id][$a_field_id];
                }
                return self::$instances[$a_obj_id][$a_field_id] = new ilAdvancedMDValue($a_field_id,$a_obj_id);
        }
        
        public function __toString()
        {
                return $this->value;
        }
        
        public function setObjId($a_obj_id)
        {
                $this->obj_id = $a_obj_id;
        }
        
        public function appendXML($xml_writer)
        {
                include_once('Services/AdvancedMetaData/classes/class.ilAdvancedMDFieldDefinition.php');
                
                $xml_writer->xmlElement('Value',
                        array('id' => ilAdvancedMDFieldDefinition::_lookupImportId($this->field_id)),
                        $this->getValue());
        }
        
        
        public function setValue($a_value)
        {
                $this->value = $a_value;
        }
        
        public function getValue()
        {
                return $this->value;
        }
        
        public function isDisabled()
        {
                return (bool) $this->disabled;
        }
        
        public function toggleDisabledStatus($a_status)
        {
                $this->disabled = (bool) $a_status;
        }
        
        public function delete()
        {
                $query = "DELETE FROM adv_md_values ".
                        "WHERE obj_id = ".$this->db->quote($this->obj_id)." ".
                        "AND field_id = ".$this->db->quote($this->field_id);
                $res = $this->db->query($query);
        }
        
        public function save()
        {
                $query = "REPLACE INTO adv_md_values ".
                        "SET obj_id = ".$this->db->quote($this->obj_id).", ".
                        "field_id = ".$this->db->quote($this->field_id).", ".
                        "value = ".$this->db->quote($this->getValue()).", ".
                        "disabled = ".(int) $this->isDisabled()." ";
                $res = $this->db->query($query);
        }
        
        private function read()
        {
                if(!$this->obj_id or !$this->field_id)
                {
                        return;
                }
                
                $query = "SELECT * FROM adv_md_values ".
                        "WHERE obj_id = ".$this->db->quote($this->obj_id)." ".
                        "AND field_id = ".$this->db->quote($this->field_id)." ";
                $res = $this->db->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $this->setValue($row->value);
                        $this->toggleDisabledStatus((bool) $row->disabled);
                }
                return true;    
        }
}
?>