classes/class.ilObjFileAccess.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. |
        +-----------------------------------------------------------------------------+
*/

include_once("classes/class.ilObjectAccess.php");

class ilObjFileAccess extends ilObjectAccess
{

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

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

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

        function _lookupVersion($a_id)
        {
                global $ilDB;

                $q = "SELECT * FROM file_data WHERE file_id = '".$a_id."'";
                $r = $ilDB->query($q);
                $row = $r->fetchRow(DB_FETCHMODE_OBJECT);

                return ilUtil::stripSlashes($row->version);
        }

        function _lookupFileSize($a_id, $a_as_string = false)
        {
                global $ilDB;

                $q = "SELECT * FROM file_data WHERE file_id = '".$a_id."'";
                $r = $ilDB->query($q);
                $row = $r->fetchRow(DB_FETCHMODE_OBJECT);

                $file = ilUtil::getDataDir()."/files/file_".$a_id."/".$row->file_name;

                if (@!is_file($file))
                {
                        $version_subdir = "/".sprintf("%03d", ilObjFileAccess::_lookupVersion($a_id));
                        $file = ilUtil::getDataDir()."/files/file_".$a_id.$version_subdir."/".$row->file_name;
                }

                if (is_file($file))
                {
                        $size = filesize($file);
                }
                else
                {
                        $size = 0;
                }
                
                if ($a_as_string)
                {
                        if ($size > 1000000)
                        {
                                return round($size/1000000,1)." MB";
                        }
                        else if ($size > 1000)
                        {
                                return round($size/1000,1)." KB";
                        }
                        else
                        {
                                return $size." Bytes";
                        }
                        
                }
                
                return $size;
        }

        function _lookupSuffix($a_id)
        {
                global $ilDB;

                $q = "SELECT * FROM file_data WHERE file_id = '".$a_id."'";
                $r = $ilDB->query($q);
                $row = $r->fetchRow(DB_FETCHMODE_OBJECT);

                $file = ilUtil::getDataDir()."/files/file_".$a_id."/".$row->file_name;

                if (@!is_file($file))
                {
                        $version_subdir = "/".sprintf("%03d", ilObjFileAccess::_lookupVersion($a_id));
                        $file = ilUtil::getDataDir()."/files/file_".$a_id.$version_subdir."/".$row->file_name;
                }

                if (is_file($file))
                {
                        $pi = pathinfo($file);
                        return ".".$pi["extension"];
                }
                
                return "";
        }

}

?>