<?php // $Id: import_backup.php 11791 2007-03-30 07:14:33Z pcool $
/*
============================================================================== 
	Dokeos - elearning and course management software
	
	Copyright (c) 2004 Dokeos S.A.
	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
============================================================================== 
*/
/**
 * ==============================================================================
 * Import a backup.
 * 
 * @author Bart Mollet <bart.mollet@hogent.be>
 * @package dokeos.backup
 * ==============================================================================
 */
/*
==============================================================================
		INIT SECTION
==============================================================================
*/ 
// name of the language file that needs to be included 
$language_file = array('coursebackup','admin');

// including the global file
include ('../inc/global.inc.php');

// section for the tabs
$this_section=SECTION_COURSES;

// breadcrumbs
$interbreadcrumb[] = array ("url" => "../course_info/maintenance.php", "name" => get_lang('Maintenance'));

// Displaying the header
$nameTools = get_lang('ImportBackup');
Display::display_header($nameTools);

// include additional libraries
include_once(api_get_path(LIBRARY_PATH) . 'fileManage.lib.php');
require_once('classes/CourseBuilder.class.php');
require_once('classes/CourseArchiver.class.php');
require_once('classes/CourseRestorer.class.php');
require_once('classes/CourseSelectForm.class.php');

// Display the tool title
api_display_tool_title($nameTools);

// Check access rights (only teachers are allowed here)
if( ! api_is_allowed_to_edit())
{
	api_not_allowed();	
}
/*
==============================================================================
		MAIN CODE
==============================================================================
*/ 
if(  (isset($_POST['action']) && $_POST['action'] == 'course_select_form' ) || (isset($_POST['import_option']) && $_POST['import_option'] == 'full_backup' ) )
{
	$error=false;	
	if(isset($_POST['action']) && $_POST['action'] == 'course_select_form' )
	{
		$course = CourseSelectForm::get_posted_course();
	}
	else
	{
		if( $_POST['backup_type'] == 'server')
		{
			$filename = $_POST['backup_server'];	
			$delete_file = false;
		}
		else
		{
			if($_FILES['backup']['error']==0){
				$filename = CourseArchiver::import_uploaded_file($_FILES['backup']['tmp_name']);
				$delete_file = true;
			}
			else{
				$error=true;
			}
		}
		$course = CourseArchiver::read_course($filename,$delete_file);
	}
	if( $course->has_resources())
	{
		$cr = new CourseRestorer($course);
		$cr->set_file_option($_POST['same_file_name_option']);
		$cr->restore();
		echo get_lang('ImportFinished');
	}
	else
	{
		if(!$error){
			echo get_lang('NoResourcesInBackupFile');
		}
		else{
			echo get_lang('UploadError');
		}
	}
	CourseArchiver::clean_backup_dir();
	echo '<p><a href="../course_home/course_home.php">&lt;&lt; '.get_lang('CourseHomepage').'</a></p>';
}
elseif( isset($_POST['import_option']) && $_POST['import_option'] == 'select_items')
{
	if( $_POST['backup_type'] == 'server')
	{
		$filename = $_POST['backup_server'];
		$delete_file = false;	
	}
	else
	{
		$filename = CourseArchiver::import_uploaded_file($_FILES['backup']['tmp_name']);
		$delete_file = true;
	}
	$course = CourseArchiver::read_course($filename,$delete_file);
	if( $course->has_resources())
	{
		CourseSelectForm::display_form($course,array('same_file_name_option'=>$_POST['same_file_name_option']));
	}
	else
	{
		echo get_lang('NoResourcesInBackupFile');	
		echo '<p><a href="../course_home/course_home.php">&lt;&lt; '.get_lang('CourseHomepage').'</a></p>';
	}
}
else
{
	$user = api_get_user_info();
	$backups = CourseArchiver::get_available_backups($is_platformAdmin?null:$user['user_id']);
	$backups_available = (count($backups)>0);
	
	echo get_lang('SelectBackupFile').'<br/><br/>';
	
	include (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
	$form = new FormValidator('import_backup_form','POST','import_backup.php', '','multipart/form-data');
	
	$renderer = $form->defaultRenderer();
	$renderer->setElementTemplate('<div>{element}</div> ');
	
	$form->addElement('hidden','action', 'restore_backup');
	
	$form->addElement('radio', 'backup_type', '', get_lang('LocalFile'), 'local', 'id="bt_local" class="checkbox" onclick="javascript:document.import_backup_form.backup_server.disabled=true;document.import_backup_form.backup.disabled=false;"');
	$form->addElement('file', 'backup', '', 'style="margin-left: 50px;"');
	$form->addElement('html', '<br/>');
	
	if( $backups_available ){
		$form->addElement('radio', 'backup_type', '', get_lang('ServerFile'), 'server', 'id="bt_server" class="checkbox" onclick="javascript:document.import_backup_form.backup_server.disabled=false;document.import_backup_form.backup.disabled=true;"');
		$options['null'] = '-';
		foreach($backups as $index => $backup)
		{
			$options[$backup['file']]= $backup['course_code'].' ('.$backup['date'];
		}
		$form->addElement('select', 'backup_server', '', $options, 'style="margin-left: 50px;"');
		$form->addElement('html','<script type="text/javascript">document.import_backup_form.backup_server.disabled=true;</script>');
	}
	else
	{
		$form->addElement('radio', '', '', '<i>'.get_lang('NoBackupsAvailable').'</i>', '', 'disabled="true"');
	}
	
	$form->addElement('html', '<br/><br/>');
	
	$form->addElement('radio', 'import_option', '', get_lang('ImportFullBackup'), 'full_backup', 'id="import_option_1" class="checkbox"');
	$form->addElement('radio', 'import_option', '', get_lang('LetMeSelectItems'), 'select_items', 'id="import_option_2" class="checkbox"');
	
	$form->addElement('html', '<br/><br/>');
	
	$form->addElement('html', get_lang('SameFilename'));
	$form->addElement('html', '<br/><br/>');
	$form->addElement('radio', 'same_file_name_option', '', get_lang('SameFilenameSkip'), FILE_SKIP, 'id="same_file_name_option_1" class="checkbox"');
	$form->addElement('radio', 'same_file_name_option', '', get_lang('SameFilenameRename'), FILE_RENAME, 'id="same_file_name_option_2" class="checkbox"');
	$form->addElement('radio', 'same_file_name_option', '', get_lang('SameFilenameOverwrite'), FILE_OVERWRITE, 'id="same_file_name_option_3" class="checkbox"');
	
	$form->addElement('html', '<br/>');
	$form->addElement('submit', null, get_lang('ImportBackup'));
	
	$values['backup_type'] = 'local';
	$values['import_option'] = 'full_backup';
	$values['same_file_name_option'] = FILE_OVERWRITE;
	$form->setDefaults($values);
	
	$form->add_progress_bar();
	
	$form->display();
		
}
/*
==============================================================================
		FOOTER 
==============================================================================
*/ 
Display::display_footer();
?>