class.ilCourseLMHistory.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. |
        +-----------------------------------------------------------------------------+
*/


class ilCourseLMHistory
{
        var $db;

        var $course_id;
        var $user_id;

        public function __construct($crs_id,$user_id)
        {
                global $ilDB;

                $this->db =& $ilDB;

                $this->course_id = $crs_id;
                $this->user_id = $user_id;
        }

        function getUserId()
        {
                return $this->user_id;
        }
        function getCourseRefId()
        {
                return $this->course_id;
        }

        static function _updateLastAccess($a_user_id,$a_lm_ref_id,$a_page_id)
        {
                global $tree,$ilDB;

                if(!$crs_ref_id = $tree->checkForParentType($a_lm_ref_id,'crs'))
                {
                        return true;
                }

                // Delete old entries
                $query = "DELETE FROM crs_lm_history ".
                        "WHERE lm_ref_id = ".$ilDB->quote($a_lm_ref_id,'integer')." ".
                        "AND usr_id = ".$ilDB->quote($a_user_id,'integer')."";
                $res = $ilDB->manipulate($query);

                // Add new entry
                $fields = array("usr_id" => array("integer", $a_user_id),
                        "crs_ref_id" => array("integer", $crs_ref_id),
                        "lm_ref_id" => array("integer", $a_lm_ref_id),
                        "lm_page_id" => array("integer", $a_page_id),
                        "last_access" => array("integer", time()));
                $ilDB->insert("crs_lm_history", $fields);
                return true;
        }

        function getLastLM()
        {
                global $ilDB;
                
                $query = "SELECT * FROM crs_lm_history ".
                        "WHERE usr_id = ".$ilDB->quote($this->getUserId(),'integer')." ".
                        "AND crs_ref_id = ".$ilDB->quote($this->getCourseRefId(),'integer')." ".
                        "ORDER BY last_access ";

                $res = $this->db->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return $row->lm_ref_id;
                }
                return false;
        }

        function getLMHistory()
        {
                global $ilDB;
                
                $query = "SELECT * FROM crs_lm_history ".
                        "WHERE usr_id = ".$ilDB->quote($this->getUserId(),'integer')." ".
                        "AND crs_ref_id = ".$ilDB->quote($this->getCourseRefId(),'integer')."";

                $res = $this->db->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $lm[$row->lm_ref_id]['lm_ref_id'] = $row->lm_ref_id;
                        $lm[$row->lm_ref_id]['lm_page_id'] = $row->lm_page_id;
                        $lm[$row->lm_ref_id]['last_access'] = $row->last_access;
                }
                return $lm ? $lm : array();
        }

        public static function _deleteUser($a_usr_id)
        {
                global $ilDB;

                $query = "DELETE FROM crs_lm_history WHERE usr_id = ".$ilDB->quote($a_usr_id,'integer')." ";
                $res = $ilDB->manipulate($query);

                return true;
        }
                        
}
?>