class.ilObjFileBasedLMAccess.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2009 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 ilObjFileBasedLMAccess extends ilObjectAccess
{
        function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
        {
                global $ilUser, $lng, $rbacsystem, $ilAccess;

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

                switch ($a_permission)
                {
                        case "visible":
                                if (!ilObjFileBasedLMAccess::_lookupOnline($a_obj_id) &&
                                        (!$rbacsystem->checkAccessOfUser($a_user_id,'write', $a_ref_id)))
                                {
                                        $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
                                        return false;
                                }
                                break;

                        case "read":

                                if ((!ilObjFileBasedLMAccess::_lookupOnline($a_obj_id)
                                        && !$rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id)) ||
                                        ilObjFileBasedLMAccess::_determineStartUrl($a_obj_id) == "")
                                {
                                        $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
                                        return false;
                                }
                                break;
                }


                return true;
        }
        
        function _getCommands()
        {
                $commands = array
                (
                        array("permission" => "read", "cmd" => "view", "lang_var" => "show",
                                "default" => true),
                        array("permission" => "write", "cmd" => "edit", "lang_var" => "edit"),
                );
                
                return $commands;
        }

        //
        // access relevant methods
        //

        function _lookupOnline($a_id)
        {
                global $ilDB;

                $q = "SELECT * FROM file_based_lm WHERE id = ".$ilDB->quote($a_id, "integer");
                $set = $ilDB->query($q);
                $rec = $ilDB->fetchAssoc($set);

                return ilUtil::yn2tf($rec["is_online"]);
        }

        function _determineStartUrl($a_id)
        {
                global $ilDB;

                $q = "SELECT * FROM file_based_lm WHERE id = ".$ilDB->quote($a_id, "integer");
                $set = $ilDB->query($q);
                $rec = $ilDB->fetchAssoc($set);
                $start_file = $rec["startfile"];
                $dir = ilUtil::getWebspaceDir()."/lm_data/lm_".$a_id;
                
                if (($start_file != "") &&
                        (@is_file($dir."/".$start_file)))
                {
                        return "./".$dir."/".$start_file;
                }
                else if (@is_file($dir."/index.html"))
                {
                        return "./".$dir."/index.html";
                }
                else if (@is_file($dir."/index.htm"))
                {
                        return "./".$dir."/index.htm";
                }

                return "";
        }

        function _checkGoto($a_target)
        {
                global $ilAccess;
                
                $t_arr = explode("_", $a_target);

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

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

        function _lookupDiskUsage($a_id)
        {
                $lm_data_dir = ilUtil::getWebspaceDir('filesystem')."/lm_data";
                $lm_dir = $lm_data_dir.DIRECTORY_SEPARATOR."lm_".$a_id;
                
                return file_exists($lm_dir) ? ilUtil::dirsize($lm_dir) : 0;
                
        }
}

?>