<?php // $Id: CourseRestorer.class.php 19948 2009-04-21 17:27:59Z juliomontoya $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2008 Dokeos SPRL
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)
	Copyright (c) Bart Mollet (bart.mollet@hogent.be)

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	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.

	See the GNU General Public License for more details.

	Contact address: Dokeos, 44 rue des palais, B-1030 Brussels, Belgium
	Mail: info@dokeos.com
==============================================================================
*/
require_once ('Course.class.php');
require_once ('Event.class.php');
require_once ('Link.class.php');
require_once ('ToolIntro.class.php');
require_once ('LinkCategory.class.php');
require_once ('ForumCategory.class.php');
require_once ('Forum.class.php');
require_once ('ForumTopic.class.php');
require_once ('ForumPost.class.php');
require_once ('CourseDescription.class.php');
require_once ('Learnpath.class.php');
require_once ('Survey.class.php');
require_once ('SurveyQuestion.class.php');
require_once ('mkdirr.php');
require_once ('rmdirr.php');
include_once(api_get_path(LIBRARY_PATH) . 'fileUpload.lib.php');

define('FILE_SKIP', 1);
define('FILE_RENAME', 2);
define('FILE_OVERWRITE', 3);
/**
 * Class to restore items from a course object to a Dokeos-course
 * @author Bart Mollet <bart.mollet@hogent.be>
 * @package dokeos.backup
 */
class CourseRestorer
{
	/**
	 * The course-object
	 */
	var $course;
	/**
	 * What to do with files with same name (FILE_SKIP, FILE_RENAME or
	 * FILE_OVERWRITE)
	 */
	var $file_option;
	/**
	 * Create a new CourseRestorer
	 */
	function CourseRestorer($course)
	{
		$this->course = $course;
		$this->file_option = FILE_RENAME;
	}
	/**
	 * Set the file-option
	 * @param constant $options What to do with files with same name (FILE_SKIP,
	 * FILE_RENAME or FILE_OVERWRITE)
	 */
	function set_file_option($option)
	{
		$this->file_option = $option;
	}
	/**
	 * Restore a course.
	 * @param string $destination_course_code The code of the Dokeos-course in
	 * which the resources should be stored. Default: Current Dokeos-course.
	 */
	function restore($destination_course_code = '')
	{
		if ($destination_course_code == '') {
			$course_info = api_get_course_info();
			$this->course->destination_db = $course_info['dbName'];
			$this->course->destination_path = $course_info['path'];
		} else {
			$course_info = Database :: get_course_info($destination_course_code);
			$this->course->destination_db = $course_info['database'];
			$this->course->destination_path = $course_info['directory'];
		}
		$this->restore_links();
		$this->restore_tool_intro();
		$this->restore_events();
		$this->restore_announcements();
		$this->restore_documents();
		$this->restore_scorm_documents();
		$this->restore_course_descriptions();
		//$this->restore_forums();
		$this->restore_quizzes(); // after restore_documents! (for correct import of sound/video)
		$this->restore_learnpaths();
		$this->restore_surveys();
		$this->restore_student_publication();
		// Restore the item properties
		$table = Database :: get_course_table(TABLE_ITEM_PROPERTY, $this->course->destination_db);
		foreach ($this->course->resources as $type => $resources) {
			if (is_array($resources)) {
				foreach ($resources as $id => $resource) {
					foreach ($resource->item_properties as $property)
					{
						// First check if there isn't allready a record for this resource
						$sql = "SELECT * FROM $table WHERE tool = '".$property['tool']."' AND ref = '".$resource->destination_id."'";
						$res = api_sql_query($sql,__FILE__,__LINE__);
						if( Database::num_rows($res) == 0)
						{
							// The to_group_id and to_user_id are set to default values as users/groups possibly not exist in the target course
							$sql = "INSERT INTO $table SET
													tool = '".$property['tool']."',
													insert_user_id = '".$property['insert_user_id']."',
													insert_date = '".$property['insert_date']."',
													lastedit_date = '".$property['lastedit_date']."',
													ref = '".$resource->destination_id."',
													lastedit_type = '".$property['lastedit_type']."',
													lastedit_user_id = '".$property['lastedit_user_id']."',
													visibility = '".$property['visibility']."',
													start_visible = '".$property['start_visible']."',
													end_visible = '".$property['end_visible']."',
													to_user_id  = '".$property['to_user_id']."',
													to_group_id = '0'";
													;
							api_sql_query($sql, __FILE__, __LINE__);
						}
					}
				}
			}
		}
		// Restore the linked-resources
		$table = Database :: get_course_table(TABLE_LINKED_RESOURCES, $this->course->destination_db);
		foreach ($this->course->resources as $type => $resources)
		{
			if (is_array($resources)) 
				foreach ($resources as $id => $resource)
				{
					$linked_resources = $resource->get_linked_resources();
					foreach ($linked_resources as $to_type => $to_ids)
					{
						foreach ($to_ids as $index => $to_id)
						{
							$to_resource = $this->course->resources[$to_type][$to_id];
							$sql = "INSERT INTO ".$table." SET source_type = '".$type."', source_id = '".$resource->destination_id."', resource_type='".$to_type."', resource_id='".$to_resource->destination_id."' ";
							api_sql_query($sql, __FILE__, __LINE__);
						}
					}
				}
		}
	}
	/**
	 * Restore documents
	 */
	function restore_documents()
	{		
		if ($this->course->has_resources(RESOURCE_DOCUMENT)) {			
			$table = Database :: get_course_table(TABLE_DOCUMENT, $this->course->destination_db);
			$resources = $this->course->resources;
			$destination_course['dbName']= $this->course->destination_db;
			/* echo '<pre>'; echo $this->course->backup_path; echo '<br>'; */
			foreach ($resources[RESOURCE_DOCUMENT] as $id => $document) {
				$path = api_get_path(SYS_COURSE_PATH).$this->course->destination_path.'/';
				$perm = api_get_setting('permissions_for_new_directories');
			    $perm = octdec(!empty($perm)?$perm:0770);
			    $dirs = explode('/', dirname($document->path));	
			    if (count($dirs)==1) {
			    	if ($this->file_type==FOLDER) {
			    		$new = substr($document->path, 8);
			    		$created_dir = create_unexisting_directory($destination_course,api_get_user_id(),0, 0 ,$path.'document',$new,basename($new));
			    	}
			    } else {			    	    								
					$my_temp = '';		
					for ($i=1; $i<=count($dirs); $i++) {			
						$my_temp .= $dirs[$i];					
						if (!is_dir($path.'document/'.$my_temp)) {											
							$sql = "SELECT id FROM ".$table." WHERE path='/".Database::escape_string($my_temp)."'"; 
							//echo '<br>';							
							$res = api_sql_query($sql, __FILE__, __LINE__);							
							$num_result = Database::num_rows($res);					
							if ($num_result==0) {
								$created_dir = create_unexisting_directory($destination_course,api_get_user_id(),0, 0 ,$path.'document','/'.$my_temp,basename($my_temp));
							}
						}
						$my_temp .= '/';																
					}
			    }
			    /*
				echo '<br>';
				echo '------------------------';
				echo '<br>';
				echo '$doculent:';echo '<br>';
				echo print_r($document); echo '<br>';
				echo 'documlent->path'.$path.$document->path;echo '<br>';
				echo 'file option:'.$this->file_option; echo '<br>';
				echo 'filetype:'.$document->file_type ;
				echo '<br>';
				*/
				if ($document->file_type == DOCUMENT) {
					if (file_exists($path.$document->path)) {	
						switch ($this->file_option) {
							case FILE_OVERWRITE :								
								$this->course->backup_path.'/'.$document->path;
								copy($this->course->backup_path.'/'.$document->path, $path.$document->path);
								$sql = "SELECT id FROM ".$table." WHERE path='/".substr($document->path, 9)."'";
								$res = api_sql_query($sql, __FILE__, __LINE__);
								$obj = Database::fetch_object($res);
								$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = $obj->id;
								$sql = "UPDATE ".$table." SET comment = '".Database::escape_string($document->comment)."', title='".Database::escape_string($document->title)."', size='".$document->size."' WHERE id = '".$obj->id."'";
								api_sql_query($sql, __FILE__, __LINE__);
								break;
							case FILE_SKIP :
								$sql = "SELECT id FROM ".$table." WHERE path='/".Database::escape_string(substr($document->path, 9))."'";
								$res = api_sql_query($sql, __FILE__, __LINE__);
								$obj = Database::fetch_object($res);
								$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = $obj->id;
								break;
							case FILE_RENAME :
								$i = 1;
								$ext = explode('.', basename($document->path));
								if (count($ext) > 1) {
									$ext = array_pop($ext);
									$file_name_no_ext = substr($document->path, 0, - (strlen($ext) + 1));
									$ext = '.'.$ext;
								} else {
									$ext = '';
									$file_name_no_ext = $document->path;
								}
								$new_file_name = $file_name_no_ext.'_'.$i.$ext;
								$file_exists = file_exists($path.$new_file_name);
								while ($file_exists) {
									$i ++;
									$new_file_name = $file_name_no_ext.'_'.$i.$ext;
									$file_exists = file_exists($path.$new_file_name);
								}
								copy($this->course->backup_path.'/'.$document->path, $path.$new_file_name);
								$sql = "INSERT INTO ".$table." SET path = '/".Database::escape_string(substr($new_file_name, 9))."', comment = '".Database::escape_string($document->comment)."', title = '".Database::escape_string($document->title)."' ,filetype='".$document->file_type."', size= '".$document->size."'";
								api_sql_query($sql, __FILE__, __LINE__);
								$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = Database::get_last_insert_id();
								//also insert into item_property
								/*
								api_item_property_update(
										array('dbName'=>$this->course->destination_db,
										TOOL_DOCUMENT,
										$this->course->resource[RESOURCE_DOCUMENT][$id]->destination_id,
										'DocumentAdded',
										);
								*/
								break;
						} // end switch
					} // end if file exists
					else
					{
						//make sure the source file actually exists
						//echo $this->course->backup_path.'/'.$document->path;
						if(is_file($this->course->backup_path.'/'.$document->path) && is_readable($this->course->backup_path.'/'.$document->path) && is_dir(dirname($path.$document->path)) && is_writeable(dirname($path.$document->path)))
						{
							copy($this->course->backup_path.'/'.$document->path, $path.$document->path);
							$sql = "INSERT INTO ".$table." SET path = '/".substr($document->path, 9)."', comment = '".Database::escape_string($document->comment)."', title = '".Database::escape_string($document->title)."' ,filetype='".$document->file_type."', size= '".$document->size."'";
							api_sql_query($sql, __FILE__, __LINE__);
							$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = Database::get_last_insert_id();
						}
						else
						{
							if(is_file($this->course->backup_path.'/'.$document->path) && is_readable($this->course->backup_path.'/'.$document->path))
							{
								error_log('Course copy generated an ignoreable error while trying to copy '.$this->course->backup_path.'/'.$document->path.': file not found');
							}
							if(!is_dir(dirname($path.$document->path)))
							{
								error_log('Course copy generated an ignoreable error while trying to copy to '.dirname($path.$document->path).': directory not found');
							}
							if(!is_writeable(dirname($path.$document->path)))
							{
								error_log('Course copy generated an ignoreable error while trying to copy to '.dirname($path.$document->path).': directory not writeable');
							}
						}
					} // end file doesn't exist
				}				
				else
				{
					/*$sql = "SELECT id FROM ".$table." WHERE path = '/".Database::escape_string(substr($document->path, 9))."'";
					$res = api_sql_query($sql,__FILE__,__LINE__);
					if( Database::num_rows($res)> 0)
					{
						$obj = Database::fetch_object($res);
						$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = $obj->id;	
					}
					else
					{
						$sql = "INSERT INTO ".$table." SET path = '/".Database::escape_string(substr($document->path, 9))."', comment = '".Database::escape_string($document->comment)."', title = '".Database::escape_string($document->title)."' ,filetype='".$document->file_type."', size= '".$document->size."'";
						api_sql_query($sql, __FILE__, __LINE__);
						$this->course->resources[RESOURCE_DOCUMENT][$id]->destination_id = Database::get_last_insert_id();
					}*/
				} // end folder
			} // end for each
		}
	}

	/**
	 * Restore scorm documents
	 * TODO @TODO check that the restore function with renaming doesn't break the scorm structure!
	 */
	function restore_scorm_documents()
	{
		if ($this->course->has_resources(RESOURCE_SCORM))
		{
			$resources = $this->course->resources;

			foreach ($resources[RESOURCE_SCORM] as $id => $document)
			{
				$path = api_get_path(SYS_COURSE_PATH).$this->course->destination_path.'/';

				$perm = api_get_setting('permissions_for_new_directories');
			        $perm = octdec(!empty($perm)?$perm:'0770');
				mkdirr(dirname($path.$document->path),$perm);

				if (file_exists($path.$document->path))
				{
					switch ($this->file_option)
					{
						case FILE_OVERWRITE :
							rmdirr($path.$document->path);

							copyDirTo($this->course->backup_path.'/'.$document->path, $path.dirname($document->path), false);

							break;
						case FILE_SKIP :
							break;
						case FILE_RENAME :
							$i = 1; 

							$ext = explode('.', basename($document->path));

							if (count($ext) > 1)
							{
								$ext = array_pop($ext);
								$file_name_no_ext = substr($document->path, 0, - (strlen($ext) + 1));
								$ext = '.'.$ext;
							}
							else
							{
								$ext = '';
								$file_name_no_ext = $document->path;
							}

							$new_file_name = $file_name_no_ext.'_'.$i.$ext;
							$file_exists = file_exists($path.$new_file_name);

							while ($file_exists)
							{
								$i ++;
								$new_file_name = $file_name_no_ext.'_'.$i.$ext;
								$file_exists = file_exists($path.$new_file_name);
							}

							rename($this->course->backup_path.'/'.$document->path,$this->course->backup_path.'/'.$new_file_name);

							copyDirTo($this->course->backup_path.'/'.$new_file_name, $path.dirname($new_file_name), false);

							rename($this->course->backup_path.'/'.$new_file_name,$this->course->backup_path.'/'.$document->path);

							break;
					} // end switch
				} // end if file exists
				else
				{
					copyDirTo($this->course->backup_path.'/'.$document->path, $path.dirname($document->path), false);
				}
			} // end for each
		}
	}

	/**
	 * Restore forums
	 */
	function restore_forums()
	{
		if ($this->course->has_resources(RESOURCE_FORUM))
		{
			$table_forum = Database :: get_course_table(TABLE_FORUM, $this->course->destination_db);
			$table_topic = Database :: get_course_table(TABLE_FORUM_POST, $this->course->destination_db);
			$table_post = Database :: get_course_table(TABLE_FORUM_POST, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_FORUM] as $id => $forum)
			{
				$cat_id = $this->restore_forum_category($forum->category_id);
				$sql = "INSERT INTO ".$table_forum." SET forum_name = '".Database::escape_string($forum->title)."', forum_desc = '".Database::escape_string($forum->description)."', cat_id = '".$cat_id."', forum_access='2'";
				api_sql_query($sql, __FILE__, __LINE__);
				$new_id = Database::get_last_insert_id();
				$this->course->resources[RESOURCE_FORUM][$id]->destination_id = $new_id;
				$forum_topics = 0;
				if (is_array($this->course->resources[RESOURCE_FORUMTOPIC]))
				{
					foreach ($this->course->resources[RESOURCE_FORUMTOPIC] as $topic_id => $topic)
					{
						if ($topic->forum_id == $id)
						{
							$this->restore_topic($topic_id, $new_id);
							$forum_topics ++;
						}
					}
				}
				if ($forum_topics > 0)
				{
					$last_post = $this->course->resources[RESOURCE_FORUMPOST][$forum->last_post];
					$sql = "UPDATE ".$table_forum." SET forum_topics = ".$forum_topics.", forum_last_post_id = ".$last_post->destination_id." WHERE forum_id = '".$new_id."' ";
					api_sql_query($sql, __FILE__, __LINE__);
				}
			}
		}
	}
	/**
	 * Restore forum-categories
	 */
	function restore_forum_category($id)
	{
		$forum_cat_table = Database :: get_course_table(TABLE_FORUM_CATEGORY, $this->course->destination_db);
		$resources = $this->course->resources;
		$forum_cat = $resources[RESOURCE_FORUMCATEGORY][$id];
		if (!$forum_cat->is_restored())
		{
			$sql = "INSERT INTO ".$forum_cat_table." SET cat_title = '".Database::escape_string($forum_cat->title.' ('.$this->course->code.')')."'";
			api_sql_query($sql, __FILE__, __LINE__);
			$new_id = Database::get_last_insert_id();
			$this->course->resources[RESOURCE_FORUMCATEGORY][$id]->destination_id = $new_id;
			return $new_id;
		}
		return $this->course->resources[RESOURCE_FORUMCATEGORY][$id]->destination_id;
	}
	/**
	 * Restore a forum-topic
	 */
	function restore_topic($id, $forum_id)
	{
		$table = Database :: get_course_table(TABLE_FORUM_POST, $this->course->destination_db);
		$resources = $this->course->resources;
		$topic = $resources[RESOURCE_FORUMTOPIC][$id];
		$sql = "INSERT INTO ".$table." SET topic_title = '".Database::escape_string($topic->title)."', topic_time = '".$topic->time."', nom = '".Database::escape_string($topic->lastname)."', prenom = '".Database::escape_string($topic->firstname)."', topic_notify = '".$topic->topic_notify."', forum_id = '".$forum_id."'";
		api_sql_query($sql, __FILE__, __LINE__);
		$new_id = Database::get_last_insert_id();
		$this->course->resources[RESOURCE_FORUMTOPIC][$id]->destination_id = $new_id;
		$topic_replies = -1;
		foreach ($this->course->resources[RESOURCE_FORUMPOST] as $post_id => $post)
		{
			if ($post->topic_id == $id)
			{
				$topic_replies ++;
				$this->restore_post($post_id, $new_id, $forum_id);
			}
		}
		if ($topic_replies >= 0)
		{
			$last_post = $this->course->resources[RESOURCE_FORUMPOST][$topic->last_post];
			$sql = "UPDATE ".$table." SET topic_replies = '".$topic_replies."', topic_last_post_id = ".$last_post->destination_id;
			api_sql_query($sql, __FILE__, __LINE__);
		}
		return $new_id;
	}
	/**
	 * restore a forum-post
	 * @todo restore tree-structure of posts.
	 */
	function restore_post($id, $topic_id, $forum_id)
	{
		$table_post = Database :: get_course_table(TABLE_FORUM_POST, $this->course->destination_db);
		$table_posttext = Database :: get_course_table(TOOL_FORUM_POST_TEXT_TABLE, $this->course->destination_db);
		$resources = $this->course->resources;
		$post = $resources[RESOURCE_FORUMPOST][$id];
		$sql = "INSERT INTO ".$table_post." SET topic_id = '".$topic_id."', post_time = '".$post->post_time."', forum_id = '".$forum_id."', nom = '".Database::escape_string($post->lastname)."', prenom = '".Database::escape_string($post->firstname)."', topic_notify = '".$post->topic_notify."', poster_ip = '".$post->poster_ip."'";
		api_sql_query($sql, __FILE__, __LINE__);
		$new_id = Database::get_last_insert_id();
		$this->course->resources[RESOURCE_FORUMPOST][$id]->destination_id = $new_id;
		$sql = "INSERT INTO ".$table_posttext." SET post_text = '".Database::escape_string($post->text)."', post_title = '".Database::escape_string($post->title)."', post_id = '".$new_id."'";
		api_sql_query($sql, __FILE__, __LINE__);
		return $new_id;
	}
	/**
	 * Restore links
	 */
	function restore_links()
	{
		if ($this->course->has_resources(RESOURCE_LINK))
		{
			$link_table = Database :: get_course_table(TABLE_LINK, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_LINK] as $id => $link)
			{
				$cat_id = $this->restore_link_category($link->category_id);
				$sql = "SELECT MAX(display_order) FROM  $link_table WHERE category_id='" . Database::escape_string($cat_id). "'";
				$result = api_sql_query($sql, __FILE__, __LINE__);
    			list($max_order) = Database::fetch_array($result);
				$sql = "INSERT INTO ".$link_table." SET url = '".Database::escape_string($link->url)."', title = '".Database::escape_string($link->title)."', description = '".Database::escape_string($link->description)."', category_id='".$cat_id."', on_homepage = '".$link->on_homepage."', display_order='".($max_order+1)."'";
				api_sql_query($sql, __FILE__, __LINE__);
				$this->course->resources[RESOURCE_LINK][$id]->destination_id = Database::get_last_insert_id();
			}
		}
	}
	/**
	 * Restore tool intro
	 */
	function restore_tool_intro()
	{
		if ($this->course->has_resources(RESOURCE_TOOL_INTRO))
		{
			$tool_intro_table = Database :: get_course_table(TABLE_TOOL_INTRO, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_TOOL_INTRO] as $id => $tool_intro)
			{
				$sql = "DELETE FROM ".$tool_intro_table." WHERE id='".Database::escape_string($tool_intro->id)."'";
				api_sql_query($sql, __FILE__, __LINE__);

				$sql = "INSERT INTO ".$tool_intro_table." SET id='".Database::escape_string($tool_intro->id)."', intro_text = '".Database::escape_string($tool_intro->intro_text)."'";
				api_sql_query($sql, __FILE__, __LINE__);

				$this->course->resources[RESOURCE_TOOL_INTRO][$id]->destination_id = Database::get_last_insert_id();
			}
		}
	}
	/**
	 * Restore a link-category
	 */
	function restore_link_category($id)
	{
		if ($id == 0)
			return 0;
		$link_cat_table = Database :: get_course_table(TABLE_LINK_CATEGORY, $this->course->destination_db);
		$resources = $this->course->resources;
		$link_cat = $resources[RESOURCE_LINKCATEGORY][$id];
		if (is_object($link_cat) && !$link_cat->is_restored())
		{
			$sql = "SELECT MAX(display_order) FROM  $link_cat_table";
			$result=api_sql_query($sql,__FILE__,__LINE__);
			list($orderMax)=Database::fetch_array($result,'NUM');
			$display_order=$orderMax+1;
			$sql = "INSERT INTO ".$link_cat_table." SET category_title = '".Database::escape_string($link_cat->title)."', description='".Database::escape_string($link_cat->description)."', display_order='".$display_order."' ";
			api_sql_query($sql, __FILE__, __LINE__);
			$new_id = Database::get_last_insert_id();
			$this->course->resources[RESOURCE_LINKCATEGORY][$id]->destination_id = $new_id;
			return $new_id;
		}
		return $this->course->resources[RESOURCE_LINKCATEGORY][$id]->destination_id;
	}
	/**
	 * Restore events
	 */
	function restore_events()
	{
		if ($this->course->has_resources(RESOURCE_EVENT))
		{
			$table = Database :: get_course_table(TABLE_AGENDA, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_EVENT] as $id => $event)
			{
				$sql = "INSERT INTO ".$table." SET title = '".Database::escape_string($event->title)."', content = '".Database::escape_string($event->content)."', start_date = '".$event->start_date."', end_date = '".$event->end_date."'";
				api_sql_query($sql, __FILE__, __LINE__);
				$this->course->resources[RESOURCE_EVENT][$id]->destination_id = Database::get_last_insert_id();
			}
		}
	}
	/**
	 * Restore course-description
	 */
	function restore_course_descriptions()
	{
		if ($this->course->has_resources(RESOURCE_COURSEDESCRIPTION))
		{
			$table = Database :: get_course_table(TABLE_COURSE_DESCRIPTION, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_COURSEDESCRIPTION] as $id => $cd)
			{
				$sql = "INSERT INTO ".$table." SET title = '".Database::escape_string($cd->title)."', content = '".Database::escape_string($cd->content)."'";
				api_sql_query($sql, __FILE__, __LINE__);
				$this->course->resources[RESOURCE_COURSEDESCRIPTION][$id]->destination_id = Database::get_last_insert_id();
			}
		}
	}
	/**
	 * Restore announcements
	 */
	function restore_announcements()
	{
		if ($this->course->has_resources(RESOURCE_ANNOUNCEMENT))
		{
			$table = Database :: get_course_table(TABLE_ANNOUNCEMENT, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_ANNOUNCEMENT] as $id => $announcement)
			{
				$sql = "INSERT INTO ".$table." " .
						"SET title = '".Database::escape_string($announcement->title)."'," .
							"content = '".Database::escape_string($announcement->content)."', " .
							"end_date = '".$announcement->date."', " .
							"display_order = '".$announcement->display_order."', " .
							"email_sent = '".$announcement->email_sent."'";
				api_sql_query($sql, __FILE__, __LINE__);
				$this->course->resources[RESOURCE_ANNOUNCEMENT][$id]->destination_id = Database::get_last_insert_id();
			}
		}
	}
	/**
	 * Restore Quiz
	 */
	function restore_quizzes()
	{
		if ($this->course->has_resources(RESOURCE_QUIZ))
		{
			$table_qui = Database :: get_course_table(TABLE_QUIZ_TEST, $this->course->destination_db);
			$table_rel = Database :: get_course_table(TABLE_QUIZ_TEST_QUESTION, $this->course->destination_db);
			$table_doc = Database :: get_course_table(TABLE_DOCUMENT, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_QUIZ] as $id => $quiz)
			{
				$doc = '';
				if (strlen($quiz->media) > 0)
				{
					if ($this->course->resources[RESOURCE_DOCUMENT][$quiz->media]->is_restored())
					{
						$sql = "SELECT path FROM ".$table_doc." WHERE id = ".$resources[RESOURCE_DOCUMENT][$quiz->media]->destination_id;
						$doc = api_sql_query($sql, __FILE__, __LINE__);
						$doc = Database::fetch_object($doc);
						$doc = str_replace('/audio/', '', $doc->path);
					}
				}
				$sql = "INSERT INTO ".$table_qui." SET title = '".Database::escape_string($quiz->title)."', description = '".Database::escape_string($quiz->description)."', type = '".$quiz->quiz_type."', random = '".$quiz->random."', active = '".$quiz->active."', sound = '".Database::escape_string($doc)."', max_attempt = '".$quiz->attempts."' ";
				api_sql_query($sql, __FILE__, __LINE__);
				$new_id = Database::get_last_insert_id();
				$this->course->resources[RESOURCE_QUIZ][$id]->destination_id = $new_id;
				foreach ($quiz->question_ids as $index => $question_id)
				{
					$qid = $this->restore_quiz_question($question_id);
					$sql = "INSERT IGNORE INTO ".$table_rel." SET question_id = ".$qid.", exercice_id = ".$new_id."";
					api_sql_query($sql, __FILE__, __LINE__);
				}
			}
		}
	}
	/**
	 * Restore quiz-questions
	 */
	function restore_quiz_question($id)
	{
		$resources = $this->course->resources;
		$question = $resources[RESOURCE_QUIZQUESTION][$id];

		$new_id=0;

		if(is_object($question))
		{
			if ($question->is_restored())
			{
				return $question->destination_id;
			}
			$table_que = Database :: get_course_table(TABLE_QUIZ_QUESTION, $this->course->destination_db);
			$table_ans = Database :: get_course_table(TABLE_QUIZ_ANSWER, $this->course->destination_db);
			$sql = "INSERT INTO ".$table_que." SET question = '".addslashes($question->question)."', description = '".addslashes($question->description)."', ponderation = '".addslashes($question->ponderation)."', position = '".addslashes($question->position)."', type='".addslashes($question->quiz_type)."', picture='".addslashes($question->picture)."', level='".addslashes($question->level)."'";
			api_sql_query($sql, __FILE__, __LINE__);
			$new_id = Database::get_last_insert_id();
			foreach ($question->answers as $index => $answer)
			{
				$sql = "INSERT INTO ".$table_ans." SET id= '". ($index +1)."',question_id = '".$new_id."', answer = '".Database::escape_string($answer['answer'])."', correct = '".$answer['correct']."', comment = '".Database::escape_string($answer['comment'])."', ponderation='".$answer['ponderation']."', position = '".$answer['position']."', hotspot_coordinates = '".$answer['hotspot_coordinates']."', hotspot_type = '".$answer['hotspot_type']."'";
				api_sql_query($sql, __FILE__, __LINE__);
			}
			$this->course->resources[RESOURCE_QUIZQUESTION][$id]->destination_id = $new_id;
		}

		return $new_id;
	}
	/**
	 * Restore Quiz
	 */
	function restore_surveys()
	{
		if ($this->course->has_resources(RESOURCE_SURVEY))
		{
			$table_sur = Database :: get_course_table(TABLE_SURVEY, $this->course->destination_db);
			$table_que = Database :: get_course_table(TABLE_SURVEY_QUESTION, $this->course->destination_db);
			$table_ans = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION, $this->course->destination_db);
			$resources = $this->course->resources;
			foreach ($resources[RESOURCE_SURVEY] as $id => $survey)
			{	
				
				$sql_check =   'SELECT survey_id FROM '.$table_sur.'
								WHERE code = "'.Database::escape_string($survey->code).'"
								AND lang="'.Database::escape_string($survey->lang).'"
								';
				
				$result_check = api_sql_query($sql_check, __FILE__, __LINE__);
				
				$doc = '';
				$sql = "INSERT INTO ".$table_sur." " .
						"SET code = '".Database::escape_string($survey->code)."', " .
						"title = '".Database::escape_string($survey->title)."', " .
						"subtitle = '".Database::escape_string($survey->subtitle)."', " .
						"author = '".Database::escape_string($survey->author)."', " .
						"lang = '".Database::escape_string($survey->lang)."', " .
						"avail_from = '".Database::escape_string($survey->avail_from)."', " .
						"avail_till = '".Database::escape_string($survey->avail_till)."', " .
						"is_shared = '".Database::escape_string($survey->is_shared)."', " .
						"template = '".Database::escape_string($survey->template)."', " .
						"intro = '".Database::escape_string($survey->intro)."', " .
						"surveythanks = '".Database::escape_string($survey->surveythanks)."', " .
						"creation_date = '".Database::escape_string($survey->creation_date)."', " .
						"invited = '0', " .
						"answered = '0', " .
						"invite_mail = '".Database::escape_string($survey->invite_mail)."', " .
						"reminder_mail = '".Database::escape_string($survey->reminder_mail)."'";
				
				//An existing survey exists with the same code and the same language
				if(Database::num_rows($result_check) == 1)
				{
										
					switch ($this->file_option) {
						
						case FILE_SKIP:
							//Do nothing
							break;
							
						case FILE_RENAME:
							
							$survey_code = $survey->code.'_';
							$i=1;
							$temp_survey_code = $survey_code.$i;
							while (!$this->is_survey_code_available($temp_survey_code))
							{
								$temp_survey_code = $survey_code.++$i;
							}
							$survey_code = $temp_survey_code;
							
							$sql = "INSERT INTO ".$table_sur." " .
									"SET code = '".Database::escape_string($survey_code)."', " .
									"title = '".Database::escape_string($survey->title)."', " .
									"subtitle = '".Database::escape_string($survey->subtitle)."', " .
									"author = '".Database::escape_string($survey->author)."', " .
									"lang = '".Database::escape_string($survey->lang)."', " .
									"avail_from = '".Database::escape_string($survey->avail_from)."', " .
									"avail_till = '".Database::escape_string($survey->avail_till)."', " .
									"is_shared = '".Database::escape_string($survey->is_shared)."', " .
									"template = '".Database::escape_string($survey->template)."', " .
									"intro = '".Database::escape_string($survey->intro)."', " .
									"surveythanks = '".Database::escape_string($survey->surveythanks)."', " .
									"creation_date = '".Database::escape_string($survey->creation_date)."', " .
									"invited = '0', " .
									"answered = '0', " .
									"invite_mail = '".Database::escape_string($survey->invite_mail)."', " .
									"reminder_mail = '".Database::escape_string($survey->reminder_mail)."'";
							
							//Insert the new source survey
							api_sql_query($sql, __FILE__, __LINE__);
							
							$new_id = Database::get_last_insert_id();
							$this->course->resources[RESOURCE_SURVEY][$id]->destination_id = $new_id;
							foreach ($survey->question_ids as $index => $question_id)
							{
								$qid = $this->restore_survey_question($question_id);
								$sql = "UPDATE ".$table_que." " .
										"SET survey_id = ".$new_id." WHERE " .
										"question_id = ".$qid."";
								api_sql_query($sql, __FILE__, __LINE__);
								$sql = "UPDATE ".$table_ans." ".
										"SET survey_id = ".$new_id." WHERE " .
										"question_id = ".$qid."";
								api_sql_query($sql, __FILE__, __LINE__);
							}
							
							break;
							
						case FILE_OVERWRITE:
														
							// Delete the existing survey with the same code and language and import the one of the source course
							
							// getting the information of the survey (used for when the survey is shared)
							require_once(api_get_path(SYS_CODE_PATH).'survey/survey.lib.php');
							
							$sql_select_existing_survey = "SELECT * FROM $table_sur WHERE survey_id='".Database::escape_string(Database::result($result_check,0,0))."'";
							$result = api_sql_query($sql_select_existing_survey, __FILE__, __LINE__);
							$survey_data = Database::fetch_array($result,'ASSOC');
							
							// if the survey is shared => also delete the shared content
							if (is_numeric($survey_data['survey_share']))
							{
								survey_manager::delete_survey($survey_data['survey_share'], true,$this->course->destination_db);
							}
							$return = survey_manager :: delete_survey($survey_data['survey_id'],false,$this->course->destination_db);
							
							//Insert the new source survey
							api_sql_query($sql, __FILE__, __LINE__);
							
							$new_id = Database::get_last_insert_id();
							$this->course->resources[RESOURCE_SURVEY][$id]->destination_id = $new_id;
							foreach ($survey->question_ids as $index => $question_id)
							{
								$qid = $this->restore_survey_question($question_id);
								$sql = "UPDATE ".$table_que." " .
										"SET survey_id = ".$new_id." WHERE " .
										"question_id = ".$qid."";
								api_sql_query($sql, __FILE__, __LINE__);
								$sql = "UPDATE ".$table_ans." ".
										"SET survey_id = ".$new_id." WHERE " .
										"question_id = ".$qid."";
								api_sql_query($sql, __FILE__, __LINE__);
							}
							
							break;
							
						default:
							break;
					}
					
					
				}
				//No existing survey with the same language and the same code, we just copy the survey
				else
				{
					api_sql_query($sql, __FILE__, __LINE__);
					$new_id = Database::get_last_insert_id();
					$this->course->resources[RESOURCE_SURVEY][$id]->destination_id = $new_id;
					foreach ($survey->question_ids as $index => $question_id)
					{
						$qid = $this->restore_survey_question($question_id);
						$sql = "UPDATE ".$table_que." " .
								"SET survey_id = ".$new_id." WHERE " .
								"question_id = ".$qid."";
						api_sql_query($sql, __FILE__, __LINE__);
						$sql = "UPDATE ".$table_ans." ".
								"SET survey_id = ".$new_id." WHERE " .
								"question_id = ".$qid."";
						api_sql_query($sql, __FILE__, __LINE__);
					}
				}
				
			}
		}
	}
	
	/**
	 * Check availability of a survey code
	 */
	function is_survey_code_available($survey_code){
		
		$table_sur = Database :: get_course_table(TABLE_SURVEY, $this->course->destination_db);
		$sql = "SELECT * FROM $table_sur WHERE code='".Database::escape_string($survey_code)."'";
		$result = api_sql_query($sql, __FILE__, __LINE__);
		if(Database::num_rows($result) > 0) return false; else return true;
		
	}
	
	/**
	 * Restore survey-questions
	 */
	function restore_survey_question($id)
	{
		$resources = $this->course->resources;
		$question = $resources[RESOURCE_SURVEYQUESTION][$id];

		$new_id=0;

		if(is_object($question))
		{
			if ($question->is_restored())
			{
				return $question->destination_id;
			}
			$table_que = Database :: get_course_table(TABLE_SURVEY_QUESTION, $this->course->destination_db);
			$table_ans = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION, $this->course->destination_db);
			$sql = "INSERT INTO ".$table_que." " .
					"SET survey_id = '".addslashes($question->survey_id)."', " .
					"survey_question = '".addslashes($question->survey_question)."', " .
					"survey_question_comment = '".addslashes($question->survey_question_comment)."', " .
					"type = '".addslashes($question->survey_question_type)."', " .
					"display = '".addslashes($question->display)."', " .
					"sort = '".addslashes($question->sort)."', " .
					"shared_question_id = '".addslashes($question->shared_question_id)."', " .
					"max_value = '".addslashes($question->max_value)."' ";
			api_sql_query($sql, __FILE__, __LINE__);
			$new_id = Database::get_last_insert_id();
			foreach ($question->answers as $index => $answer)
			{
				$sql = "INSERT INTO ".$table_ans." " .
						"SET " .
						"question_id = '".addslashes($new_id)."', " .
						"option_text = '".addslashes($answer['option_text'])."', " .
						"sort = '".addslashes($answer['sort'])."', " .
						"survey_id = '".addslashes($question->survey_id)."'";

				api_sql_query($sql, __FILE__, __LINE__);
			}
			$this->course->resources[RESOURCE_SURVEYQUESTION][$id]->destination_id = $new_id;
		}

		return $new_id;
	}
	/**
	 * Restore learnpaths
	 */
	function restore_learnpaths()
	{
		if ($this->course->has_resources(RESOURCE_LEARNPATH))
		{
			$table_main 	= Database :: get_course_table(TABLE_LP_MAIN, $this->course->destination_db);
			$table_item 	= Database :: get_course_table(TABLE_LP_ITEM, $this->course->destination_db);
			$table_tool 	= Database::get_course_table(TABLE_TOOL_LIST, $this->course->destination_db);

			$resources = $this->course->resources;
			$prereq_old = array ();
			$item_old_id = array ();

			foreach ($resources[RESOURCE_LEARNPATH] as $id => $lp)
			{
				$sql = "INSERT INTO ".$table_main." " .
						"SET lp_type = '".$lp->lp_type."', " .
								"name = '".Database::escape_string($lp->name)."', " .
								"path = '".Database::escape_string($lp->path)."', " .
								"ref = '".$lp->ref."', " .
								"description = '".Database::escape_string($lp->description)."', " .
								"content_local = '".Database::escape_string($lp->content_local)."', " .
								"default_encoding = '".Database::escape_string($lp->default_encoding)."', " .
								"default_view_mod = '".Database::escape_string($lp->default_view_mod)."', " .
								"prevent_reinit = '".Database::escape_string($lp->prevent_reinit)."', " .
								"force_commit = '".Database::escape_string($lp->force_commit)."', " .
								"content_maker = '".Database::escape_string($lp->content_maker)."', " .
								"display_order = '".Database::escape_string($lp->display_order)."', " .
								"js_lib= '".Database::escape_string($lp->js_lib)."', " .
								"content_license= '".Database::escape_string($lp->content_license)."', " .
								"debug= '".Database::escape_string($lp->debug)."' ";
				api_sql_query($sql, __FILE__, __LINE__);

				$new_lp_id = Database::get_last_insert_id();

				if($lp->visibility)
				{
					$sql = "INSERT INTO $table_tool SET name='".Database::escape_string($lp->name)."', link='newscorm/lp_controller.php?action=view&lp_id=$new_lp_id', image='scormbuilder.gif', visibility='1', admin='0', address='squaregrey.gif'";
					api_sql_query($sql, __FILE__, __LINE__);
				}

				$new_item_ids = array();
				$parent_item_ids = array();
				$previous_item_ids = array();
				$next_item_ids = array();
				foreach ($lp->get_items() as $index => $item)
				{
					/*
					if ($item['id'] != 0)
					{
						 // Links in learnpath have types 'Link _self' or 'Link _blank'. We only need 'Link' here.
						 $type_parts = explode(' ',$item['type']);
						 $item['id'] = $this->course->resources[$type_parts[0]][$item['id']]->destination_id;
					}
					*/
					//Get the new ref ID for all items that are not sco (dokeos quizzes, documents, etc)
					$ref = '';
					if(!empty($item['ref']) && $lp->lp_type!='2'){
						$ref = $this->get_new_id($item['item_type'],$item['ref']);
					}else{
						$ref = $item['ref'];
					}
					//Dealing with path the same way as ref as some data has been put into path when it's a
					//local resource
					$path = Database::escape_string($item['path']);
					if(strval(intval($path)) === $path)
					{
						$path = $this->get_new_id($item['item_type'],$path);
					}
					$sql = "INSERT INTO ".$table_item." SET " .
							"lp_id = '".$new_lp_id."', " .
							"item_type='".$item['item_type']."', " .
							"ref = '".$ref."', " .
							"title = '".Database::escape_string($item['title'])."', " .
							"description ='".Database::escape_string($item['description'])."', " .
							"path = '".$path."', " .
							"min_score = '".$item['min_score']."', " .
							"max_score = '".$item['max_score']."', " .
							"mastery_score = '".$item['mastery_score']."', " .
							"parent_item_id = '".$item['parent_item_id']."', " .
							"previous_item_id = '".$item['previous_item_id']."', " .
							"next_item_id = '".$item['next_item_id']."', " .
							"display_order = '".$item['display_order']."', " .
							"prerequisite = '".Database::escape_string($item['prerequisite'])."', " .
							"parameters='".Database::escape_string($item['parameters'])."', " .
							"launch_data = '".Database::escape_string($item['launch_dataprereq_type'])."'";
					api_sql_query($sql, __FILE__, __LINE__);
					$new_item_id = Database::get_last_insert_id();
					//save a link between old and new item IDs
					$new_item_ids[$item['id']] = $new_item_id;
					//save a reference of items that need a parent_item_id refresh
					$parent_item_ids[$new_item_id] = $item['parent_item_id'];
					//save a reference of items that need a previous_item_id refresh
					$previous_item_ids[$new_item_id] = $item['previous_item_id'];
					//save a reference of items that need a next_item_id refresh
					$next_item_ids[$new_item_id] = $item['next_item_id'];
				}
				foreach ($parent_item_ids as $new_item_id => $parent_item_old_id)
				{
					$parent_new_id = 0;
					if($parent_item_old_id != 0){
						$parent_new_id = $new_item_ids[$parent_item_old_id];
					}
					$sql = "UPDATE ".$table_item." SET parent_item_id = '".$parent_new_id."' WHERE id = '".$new_item_id."'";
					api_sql_query($sql, __FILE__, __LINE__);
				}
				foreach ($previous_item_ids as $new_item_id => $previous_item_old_id)
				{
					$previous_new_id = 0;
					if($previous_item_old_id != 0){
						$previous_new_id = $new_item_ids[$previous_item_old_id];
					}
					$sql = "UPDATE ".$table_item." SET previous_item_id = '".$previous_new_id."' WHERE id = '".$new_item_id."'";
					api_sql_query($sql, __FILE__, __LINE__);
				}
				foreach ($next_item_ids as $new_item_id => $next_item_old_id)
				{
					$next_new_id = 0;
					if($next_item_old_id != 0){
						$next_new_id = $new_item_ids[$next_item_old_id];
					}
					$sql = "UPDATE ".$table_item." SET next_item_id = '".$next_new_id."' WHERE id = '".$new_item_id."'";
					api_sql_query($sql, __FILE__, __LINE__);
				}
				$this->course->resources[RESOURCE_LEARNPATH][$id]->destination_id = $new_lp_id;
			}
		}
	}
	/**
	 * restore works
	 */
	function restore_student_publication () {
		$my_course_id=api_get_course_id();
		$my_course_info=api_get_course_info($my_course_id);//student_publication_assignment

		$my_tbl_db_spa_origin=Database :: get_course_table(TABLE_STUDENT_PUBLICATION_ASSIGNMENT,$my_course_info['dbName']);
		$my_tbl_db_spa_destination = Database :: get_course_table(TABLE_STUDENT_PUBLICATION_ASSIGNMENT, $this->course->destination_db);
		
		$my_tbl_db_origin=Database :: get_course_table(TABLE_STUDENT_PUBLICATION,$my_course_info['dbName']);
		$my_tbl_db_destination = Database :: get_course_table(TABLE_STUDENT_PUBLICATION, $this->course->destination_db);
		
		$my_tbl_db_item_property_origin=Database :: get_course_table(TABLE_ITEM_PROPERTY, $my_course_info['dbName']);
		$my_tbl_db_item_property_destination=Database :: get_course_table(TABLE_ITEM_PROPERTY, $this->course->destination_db);
		
		//query in student publication
		
		$query_sql_fin_sp='INSERT IGNORE INTO '.$my_tbl_db_destination.'' .
		'(id,url,title,description,author,active,accepted,post_group_id,sent_date,' .
		'filetype,has_properties,view_properties,qualification,date_of_qualification,' .
		'parent_id,qualificator_id,session_id) ';
		
		$query_sql_ini_sp='SELECT id,url,title,description,author,active,accepted,post_group_id,' .
		'sent_date,filetype,has_properties,view_properties,qualification,date_of_qualification,' .
		'parent_id,qualificator_id,session_id FROM '.$my_tbl_db_origin.' WHERE filetype="folder" ';
		//var_dump($query_sql_ini_sp);
		$destination='../../courses/'.$this->course->destination_path.'/work/';
		$origin='../../courses/'.api_get_course_id().'/work/';

		self::api_create_all_directory($origin,$destination,false);
		
		//query in item property
		
		$query_sql_fin_ip='INSERT IGNORE INTO '.$my_tbl_db_item_property_destination.'' .
		'(tool,insert_user_id,insert_date,lastedit_date,ref,lastedit_type,lastedit_user_id,to_group_id,' .
		'to_user_id,visibility,start_visible,end_visible) ';
		
		$query_sql_ini_ip='SELECT tool,insert_user_id,insert_date,lastedit_date,ref,lastedit_type,' .
		'lastedit_user_id,to_group_id,to_user_id,visibility,start_visible,
		end_visible FROM '.$my_tbl_db_item_property_origin.' ip INNER JOIN '.$my_tbl_db_origin.' sp' .
		' ON ip.ref=sp.id WHERE tool="work" ';
		
		
		$query_sql_fin_sa='INSERT IGNORE INTO '.$my_tbl_db_spa_destination.'' .
		'(id,expires_on,ends_on,add_to_calendar,enable_qualification,publication_id) ';
		
		$query_sql_ini_sa='SELECT sa.id,sa.expires_on,sa.ends_on,sa.add_to_calendar,sa.enable_qualification,sa.publication_id FROM '.$my_tbl_db_spa_origin.' sa INNER JOIN '.$my_tbl_db_origin.' sp
		ON sa.publication_id=sp.id WHERE filetype="folder" ';
		
		$query_sql_sp    = $query_sql_fin_sp.$query_sql_ini_sp;
		$query_sql_ip    = $query_sql_fin_ip.$query_sql_ini_ip;
		$query_sql_sa    = $query_sql_fin_sa.$query_sql_ini_sa;
		
		api_sql_query($query_sql_sp,__FILE__,__LINE__);
		api_sql_query($query_sql_ip,__FILE__,__LINE__);
		api_sql_query($query_sql_sa,__FILE__,__LINE__);
		
	}
	
/**
 * copy all directory and sub directory
 */
	function api_create_all_directory($source, $dest, $overwrite = false){		
   		if(!is_dir($dest)) {
    		mkdir($dest);
    	}
    
	    if ($handle = opendir($source)) {        // if the folder exploration is sucsessful, continue
	        while (false !== ($file = readdir($handle))) { // as long as storing the next file to $file is successful, continue
	            if ($file != '.' && $file != '..') {
	                $path = $source . '/' . $file;
	                if (is_file($path)) {
	                   /* if (!is_file($dest . '/' . $file) || $overwrite)
	                    if (!@copy($path, $dest . '/' . $file)) {
	                        echo '<font color="red">File ('.$path.') '.get_lang('NotHavePermission').'</font>';
	                    }*/
	                } elseif(is_dir($path)) {
	                    if (!is_dir($dest . '/' . $file))
	                    mkdir($dest . '/' . $file);
	                   self:: api_create_all_directory($path, $dest . '/' . $file, $overwrite);
	                }
	            }
	        }
	        closedir($handle);
	    }
	}

	/**
	 * Gets the new ID of one specific tool item from the tool name and the old ID
	 * @param	string	Tool name
	 * @param	integer	Old ID
	 * @return	integer	New ID
	 */
	function get_new_id($tool,$ref)
	{
		//transform $tool into one backup/restore constant
		if($tool == 'hotpotatoes'){$tool = 'document';}
		if(!empty($this->course->resources[$tool][$ref]->destination_id)){
			return $this->course->resources[$tool][$ref]->destination_id;
		}
		return '';
	}
}
?>
