class.ilCourseUserData.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 ilCourseUserData
{
    private $db;
    private $user_id;
    private $field_id;
    private $value;
    
    
    public function __construct($a_user_id, $a_field_id = 0)
    {
        global $ilDB;
        
        $this->db = $ilDB;
        $this->user_id = $a_user_id;
        $this->field_id = $a_field_id;
        
        if ($this->field_id) {
            $this->read();
        }
    }
    
    public static function _getValuesByObjId($a_obj_id)
    {
        global $ilDB;
        
        include_once('Modules/Course/classes/Export/class.ilCourseDefinedFieldDefinition.php');
        $field_ids = ilCourseDefinedFieldDefinition::_getFieldIds($a_obj_id);
        if (!count($field_ids)) {
            return array();
        }
                
        $where = "WHERE " . $ilDB->in('field_id', $field_ids, false, 'integer');
        $query = "SELECT * FROM crs_user_data " .
            $where;
        
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $user_data[$row->usr_id][$row->field_id] = $row->value;
        }
        
        return $user_data ? $user_data : array();
    }
    
    public static function _checkRequired($a_usr_id, $a_obj_id)
    {
        global $ilDB;
 
        include_once('Modules/Course/classes/Export/class.ilCourseDefinedFieldDefinition.php');
        $required = ilCourseDefinedFieldDefinition::_getRequiredFieldIds($a_obj_id);
        if (!count($required)) {
            return true;
        }
        
        //$and = ("AND field_id IN (".implode(",",ilUtil::quoteArray($required)).")");
        $and = "AND " . $ilDB->in('field_id', $required, false, 'integer');
        
        $query = "SELECT COUNT(*) num_entries FROM crs_user_data " .
            "WHERE usr_id = " . $ilDB->quote($a_usr_id, 'integer') . " " .
            "AND value != '' AND value IS NOT NULL " .
            $and . " " .
            " ";
        $res = $ilDB->query($query);
        $row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT);
        
        return $row->num_entries == count($required);
    }
    
    public static function _deleteByUser($a_user_id)
    {
        global $ilDB;
        
        $query = "DELETE FROM crs_user_data " .
            "WHERE usr_id = " . $ilDB->quote($a_user_id, 'integer');
        $res = $ilDB->manipulate($query);
    }
    
    public static function _deleteByField($a_field_id)
    {
        global $ilDB;
        
        $query = "DELETE FROM crs_user_data " .
            "WHERE field_id = " . $ilDB->quote($a_field_id, 'integer');
        $res = $ilDB->manipulate($query);
    }
    
    public function setValue($a_value)
    {
        $this->value = $a_value;
    }
    public function getValue()
    {
        return $this->value;
    }
    
    public function update()
    {
        $this->delete();
        $this->create();
    }
    
    public function delete()
    {
        global $ilDB;
        
        $query = "DELETE FROM crs_user_data " .
            "WHERE usr_id = " . $this->db->quote($this->user_id, 'integer') . " " .
            "AND field_id = " . $this->db->quote($this->field_id, 'integer');
        $res = $ilDB->manipulate($query);
    }
    
    public function create()
    {
        global $ilDB;
        
        $query = "INSERT INTO crs_user_data (value,usr_id,field_id) " .
            "VALUES( " .
            $this->db->quote($this->getValue(), 'text') . ", " .
            $this->db->quote($this->user_id, 'integer') . ", " .
            $this->db->quote($this->field_id, 'integer') . " " .
            ")";
            
        $res = $ilDB->manipulate($query);
    }
 
    private function read()
    {
        global $ilDB;
        
        $query = "SELECT * FROM crs_user_data " .
            "WHERE usr_id = " . $this->db->quote($this->user_id, 'integer') . " " .
            "AND field_id = " . $this->db->quote($this->field_id, 'integer');
        $res = $this->db->query($query);
        $row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT);
 
        $this->setValue($row->value);
    }
}