course/classes/class.ilObjCourseAccess.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("classes/class.ilObjectAccess.php");

class ilObjCourseAccess extends ilObjectAccess
{
        function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
        {
                global $ilUser, $lng, $rbacsystem, $ilAccess, $ilias;

                if ($a_user_id == "")
                {
                        $a_user_id = $ilUser->getId();
                }

                switch ($a_cmd)
                {
                        case "view":
                                include_once 'course/classes/class.ilCourseMembers.php';
                                if(ilCourseMembers::_isBlocked($a_obj_id,$a_user_id))
                                {
                                        $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("crs_status_blocked"));
                                        return false;
                                }                                       
                                break;

                        case "info":
                                // Used for permission query ?!
                                include_once 'course/classes/class.ilCourseMembers.php';
                                if(ilCourseMembers::_isMember($a_user_id,$a_obj_id))
                                {
                                        $ilAccess->addInfoItem(IL_STATUS_MESSAGE, $lng->txt("info_is_member"));
                                }
                                else
                                {
                                        $ilAccess->addInfoItem(IL_STATUS_MESSAGE, $lng->txt("info_is_not_member"));
                                }                       
                                break;

                        case 'join':
                                include_once 'course/classes/class.ilCourseMembers.php';

                                if(ilCourseMembers::_isMember($a_user_id,$a_obj_id))
                                {
                                        return false;
                                }
                                break;
                }

                switch ($a_permission)
                {
                        case "visible":
                                include_once 'course/classes/class.ilObjCourse.php';
                                $active = ilObjCourse::_isActivated($a_obj_id);
                                $registration = ilObjCourse::_registrationEnabled($a_obj_id);
                                $tutor = $rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id);

                                if(!$active)
                                {
                                        $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
                                }
                                if(!$tutor and !$active)
                                {
                                        return false;
                                }
                                break;

                        case 'read':
                                include_once 'course/classes/class.ilObjCourse.php';
                                $active = ilObjCourse::_isActivated($a_obj_id);
                                $tutor = $rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id);

                                if(!$tutor and !$active)
                                {
                                        $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
                                        return false;
                                }
                                break;
                                        
                                
                }
                return true;
        }

        function _getCommands()
        {
                $commands = array
                (
                        array("permission" => "read", "cmd" => "", "lang_var" => "view",
                                  "default" => true),
                        array("permission" => "join", "cmd" => "join", "lang_var" => "join"),
                        array("permission" => "write", "cmd" => "edit", "lang_var" => "edit")
                );
                
                return $commands;
        }
        
        function _checkGoto($a_target)
        {
                global $ilAccess;
                
                $t_arr = explode("_", $a_target);

                if ($t_arr[0] != "crs" || ((int) $t_arr[1]) <= 0)
                {
                        return false;
                }

                if ($ilAccess->checkAccess("read", "", $t_arr[1]) ||
                        $ilAccess->checkAccess("visible", "", $t_arr[1]))
                {
                        return true;
                }
                return false;
        }

}

?>