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219 lines
7.0 KiB
219 lines
7.0 KiB
<?php
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// $Id: CourseArchiver.class.php 15429 2008-05-26 20:34:37Z yannoo $
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004-2008 Dokeos SPRL
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Copyright (c) 2003 Ghent University (UGent)
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Copyright (c) 2001 Universite catholique de Louvain (UCL)
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Copyright (c) Bart Mollet (bart.mollet@hogent.be)
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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require_once ('Course.class.php');
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require_once ('mkdirr.php');
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require_once ('rmdirr.php');
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require_once (api_get_path(LIBRARY_PATH).'pclzip/pclzip.lib.php');
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/**
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* Some functions to write a course-object to a zip-file and to read a course-
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* object from such a zip-file.
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* @author Bart Mollet <bart.mollet@hogent.be>
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* @package dokeos.backup
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*
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* @todo Use archive-folder of Dokeos?
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*/
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class CourseArchiver
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{
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/**
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* Delete old temp-dirs
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*/
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function clean_backup_dir()
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{
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$dir = api_get_path(SYS_ARCHIVE_PATH);
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if ($handle = @ opendir($dir))
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{
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while (($file = readdir($handle)) !== false)
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{
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if ($file != "." && $file != ".." && strpos($file,'CourseArchiver_') == 0 && is_dir($dir.'/'.$file))
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{
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rmdirr($dir.'/'.$file);
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}
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}
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closedir($handle);
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}
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}
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/**
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* Write a course and all its resources to a zip-file.
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* @return string A pointer to the zip-file
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*/
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function write_course($course)
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{
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CourseArchiver::clean_backup_dir();
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// Create a temp directory
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$tmp_dir_name = 'CourseArchiver_'.uniqid('');
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$backup_dir = api_get_path(SYS_ARCHIVE_PATH).''.$tmp_dir_name.'/';
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// All course-information will be stored in course_info.dat
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$course_info_file = $backup_dir.'course_info.dat';
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$zip_dir = api_get_path(SYS_ARCHIVE_PATH).'';
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$user = api_get_user_info();
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$zip_file = $user['user_id'].'_'.$course->code.'_'.date("YmdHis").'.zip';
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$php_errormsg = '';
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$res = @mkdir($backup_dir, 0755);
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if($res == false)
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{
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//TODO set and handle an error message telling the user to review the permissions on the archive directory
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error_log(__FILE__.' line '.__LINE__.': '.(ini_get('track_errors')!=false?$php_errormsg:'error not recorded because track_errors is off in your php.ini').' - This error, occuring because your archive directory will not let this script write data into it, will prevent courses backups to be created',0);
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}
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// Write the course-object to the file
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$fp = @fopen($course_info_file, 'w');
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if($fp == false)
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{
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error_log(__FILE__.' line '.__LINE__.': '.(ini_get('track_errors')!=false?$php_errormsg:'error not recorded because track_errors is off in your php.ini'),0);
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}
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$res = @fwrite($fp, base64_encode(serialize($course)));
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if($res == false)
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{
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error_log(__FILE__.' line '.__LINE__.': '.(ini_get('track_errors')!=false?$php_errormsg:'error not recorded because track_errors is off in your php.ini'),0);
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}
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$res = @fclose($fp);
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if($res == false)
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{
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error_log(__FILE__.' line '.__LINE__.': '.(ini_get('track_errors')!=false?$php_errormsg:'error not recorded because track_errors is off in your php.ini'),0);
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}
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// Copy all documents to the temp-dir
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if( is_array($course->resources[RESOURCE_DOCUMENT]))
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{
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foreach ($course->resources[RESOURCE_DOCUMENT] as $id => $document)
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{
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if ($document->file_type == DOCUMENT)
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{
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$doc_dir = $backup_dir.$document->path;
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mkdirr(dirname($doc_dir), 0755);
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copy($course->path.$document->path, $doc_dir);
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}
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else
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{
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mkdirr($backup_dir.$document->path, 0755);
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}
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}
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}
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// Copy all scorm documents to the temp-dir
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if( is_array($course->resources[RESOURCE_SCORM]))
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{
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foreach ($course->resources[RESOURCE_SCORM] as $id => $document)
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{
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$doc_dir=dirname($backup_dir.$document->path);
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mkdirr($doc_dir,0755);
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copyDirTo($course->path.$document->path, $doc_dir, false);
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}
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}
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// Zip the course-contents
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$zip = new PclZip($zip_dir.$zip_file);
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$zip->create($zip_dir.$tmp_dir_name, PCLZIP_OPT_REMOVE_PATH, $zip_dir.$tmp_dir_name.'/');
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//$zip->deleteByIndex(0);
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// Remove the temp-dir.
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rmdirr($backup_dir);
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return ''.$zip_file;
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}
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/**
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*
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*/
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function get_available_backups($user_id = null)
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{
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global $dateTimeFormatLong;
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$backup_files = array();
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$dirname = api_get_path(SYS_ARCHIVE_PATH).'';
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if ($dir = opendir($dirname)) {
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while (($file = readdir($dir)) !== false) {
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$file_parts = explode('_',$file);
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if(count($file_parts) == 3)
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{
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$owner_id = $file_parts[0];
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$course_code = $file_parts[1];
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$file_parts = explode('.',$file_parts[2]);
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$date = $file_parts[0];
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$ext = $file_parts[1];
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if($ext == 'zip' && ($user_id != null && $owner_id == $user_id || $user_id == null) )
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{
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$date = substr($date,0,4).'-'.substr($date,4,2).'-'.substr($date,6,2).' '.substr($date,8,2).':'.substr($date,10,2).':'.substr($date,12,2);
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$backup_files[] = array('file' => $file, 'date' => $date, 'course_code' => $course_code);
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}
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}
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}
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closedir($dir);
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}
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return $backup_files;
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}
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/**
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*
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*/
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function import_uploaded_file($file)
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{
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$new_filename = uniqid('').'.zip';
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$new_dir = api_get_path(SYS_ARCHIVE_PATH);
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if(is_dir($new_dir) && is_writable($new_dir))
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{
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move_uploaded_file($file,api_get_path(SYS_ARCHIVE_PATH).''.$new_filename);
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return $new_filename;
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}
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return false;
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}
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/**
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* Read a course-object from a zip-file
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* @return course The course
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* @param boolean $delete Delete the file after reading the course?
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* @todo Check if the archive is a correct Dokeos-export
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*/
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function read_course($filename,$delete = false)
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{
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CourseArchiver::clean_backup_dir();
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// Create a temp directory
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$tmp_dir_name = 'CourseArchiver_'.uniqid('');
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$unzip_dir = api_get_path(SYS_ARCHIVE_PATH).''.$tmp_dir_name;
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mkdirr($unzip_dir,0755);
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@copy(api_get_path(SYS_ARCHIVE_PATH).''.$filename,$unzip_dir.'/backup.zip');
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// unzip the archive
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$zip = new PclZip($unzip_dir.'/backup.zip');
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@chdir($unzip_dir);
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$zip->extract();
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// remove the archive-file
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if($delete)
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{
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@unlink(api_get_path(SYS_ARCHIVE_PATH).''.$filename);
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}
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// read the course
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if(!is_file('course_info.dat'))
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{
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return new Course();
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}
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$fp = @fopen('course_info.dat', "r");
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$contents = @fread($fp, filesize('course_info.dat'));
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@fclose($fp);
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$course = unserialize(base64_decode($contents));
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if( get_class($course) != 'Course')
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{
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return new Course();
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}
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$course->backup_path = $unzip_dir;
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return $course;
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}
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}
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?>
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