class.ilUploadFiles.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. |
    +-----------------------------------------------------------------------------+
*/

class ilUploadFiles
{
    public static function _getUploadDirectory()
    {
        global $DIC;
        $rbacsystem = $DIC['rbacsystem'];
        
        if (!$rbacsystem->checkAccess('write', SYSTEM_FOLDER_ID)) {
            return '';
        }

        $lm_set = new ilSetting("lm");
        $upload_dir = $lm_set->get("cont_upload_dir");

        $web_directory = $DIC->filesystem()->storage();
        $import_file_factory = new ilImportDirectoryFactory($web_directory);
        try {
            $scorm_import_directory = $import_file_factory->getInstanceForComponent(ilImportDirectoryFactory::TYPE_SAHS);
        } catch (InvalidArgumentException $e) {
            return '';
        }
        return $scorm_import_directory->getAbsolutePath();
    }
    
    public static function _getUploadFiles()
    {
        if (!$upload_dir = self::_getUploadDirectory()) {
            return array();
        }

        // get the sorted content of the upload directory
        $handle = opendir($upload_dir);
        $files = array();
        while (false !== ($file = readdir($handle))) {
            $full_path = $upload_dir . "/" . $file;
            if (is_file($full_path) and is_readable($full_path)) {
                $files[] = $file;
            }
        }
        closedir($handle);
        sort($files);
        reset($files);
        
        return $files;
    }
    
    public static function _checkUploadFile($a_file)
    {
        $files = self::_getUploadFiles();
        
        return in_array($a_file, $files);
    }

    public static function _copyUploadFile($a_file, $a_target, $a_raise_errors = true)
    {
        global $DIC;
        $lng = $DIC['lng'];
        $ilias = $DIC['ilias'];

        $file = self::_getUploadDirectory() . "/" . $a_file;

        // check if file exists
        if (!is_file($file)) {
            if ($a_raise_errors) {
                $ilias->raiseError($lng->txt("upload_error_file_not_found"), $ilias->error_obj->MESSAGE);
            } else {
                ilUtil::sendFailure($lng->txt("upload_error_file_not_found"), true);
            }
            return false;
        }

        // virus handling
        $vir = ilUtil::virusHandling($file, $a_file);
        if (!$vir[0]) {
            if ($a_raise_errors) {
                $ilias->raiseError(
                    $lng->txt("file_is_infected") . "<br />" .
                    $vir[1],
                    $ilias->error_obj->MESSAGE
                );
            } else {
                ilUtil::sendFailure($lng->txt("file_is_infected") . "<br />" .
                    $vir[1], true);
            }
            return false;
        } else {
            if ($vir[1] != "") {
                ilUtil::sendInfo($vir[1], true);
            }
            return copy($file, $a_target);
        }
    }
}