<?php
// $Id: class_list.php 14209 2008-01-30 23:16:20Z yannoo $
/*
==============================================================================
	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) Olivier Brouckaert

	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: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
==============================================================================
*/
/**
==============================================================================
*	@package dokeos.admin
==============================================================================
*/

// name of the language file that needs to be included 
$language_file = 'admin';
$cidReset = true;
require ('../inc/global.inc.php');
$this_section = SECTION_PLATFORM_ADMIN;

/**
 * Gets the total number of classes
 */
function get_number_of_classes()
{
	$tbl_class = Database :: get_main_table(TABLE_MAIN_CLASS);
	$sql = "SELECT COUNT(*) AS number_of_classes FROM $tbl_class";
	if (isset ($_GET['keyword']))
	{
		$sql .= " WHERE (name LIKE '%".Database::escape_string(trim($_GET['keyword']))."%')";
	}
	$res = api_sql_query($sql, __FILE__, __LINE__);
	$obj = Database::fetch_object($res);
	return $obj->number_of_classes;
}
/**
 * Gets the information about some classes
 * @param int $from
 * @param int $number_of_items
 * @param string $direction
 */
function get_class_data($from, $number_of_items, $column, $direction)
{
	$tbl_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER);
	$tbl_class = Database :: get_main_table(TABLE_MAIN_CLASS);
	$from 				= Database::escape_string($from);
	$number_of_items 	= Database::escape_string($number_of_items);
	$column 			= Database::escape_string($column);
	$direction 			= Database::escape_string($direction);
	
	$sql = "SELECT 	id AS col0, name AS col1, COUNT(user_id) AS col2, id AS col3
				FROM $tbl_class
				LEFT JOIN $tbl_class_user ON id=class_id ";
	if (isset ($_GET['keyword']))
	{
		$sql .= " WHERE (name LIKE '%".Database::escape_string(trim($_GET['keyword']))."%')";
	}
	$sql .= "GROUP BY id,name ORDER BY col$column $direction LIMIT $from,$number_of_items";
	$res = api_sql_query($sql, __FILE__, __LINE__);
	$classes = array ();
	while ($class = Database::fetch_row($res))
	{
		$classes[] = $class;
	}
	return $classes;
}
/**
 * Filter for sortable table to display edit icons for class
 */
function modify_filter($class_id)
{
	global $charset;
	$class_id = Security::remove_XSS($class_id);
	$result = '<a href="class_information.php?id='.$class_id.'"><img src="../img/synthese_view.gif" border="0" title="'.get_lang('Info').'" alt="'.get_lang('Info').'"/></a>';
	$result .= '<a href="class_edit.php?idclass='.$class_id.'"><img src="../img/edit.gif" border="0" title="'.get_lang('Edit').'" alt="'.get_lang('Edit').'"/></a>';
	$result .= '<a href="class_list.php?action=delete_class&amp;class_id='.$class_id.'" onclick="javascript:if(!confirm('."'".addslashes(htmlentities(get_lang("ConfirmYourChoice"),ENT_QUOTES,$charset))."'".')) return false;"><img src="../img/delete.gif" border="0" title="'.get_lang('Delete').'" alt="'.get_lang('Delete').'"/></a>';
	$result .= '<a href="subscribe_user2class.php?idclass='.$class_id.'"><img src="../img/add_multiple_users.gif" border="0" alt="'.get_lang('AddUsersToAClass').'" title="'.get_lang('AddUsersToAClass').'"/></a>';
	return $result;
}

api_protect_admin_script();
require (api_get_path(LIBRARY_PATH).'fileManage.lib.php');
require (api_get_path(LIBRARY_PATH).'classmanager.lib.php');
require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
$tool_name = get_lang('ClassList');
$interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));

Display :: display_header($tool_name);
//api_display_tool_title($tool_name);
if (isset ($_POST['action']))
{
	switch ($_POST['action'])
	{
		// Delete selected classes
		case 'delete_classes' :
			$classes = $_POST['class'];
			if (count($classes) > 0)
			{
				foreach ($classes as $index => $class_id)
				{
					ClassManager :: delete_class($class_id);
				}
				Display :: display_normal_message(get_lang('ClassesDeleted'));
			}
			break;
	}
}
if (isset ($_GET['action']))
{
	switch ($_GET['action'])
	{
		case 'delete_class' :
			ClassManager :: delete_class($_GET['class_id']);
			Display :: display_normal_message(get_lang('ClassDeleted'));
	}
}
// Create a search-box
$form = new FormValidator('search_simple','get','','',null,false);
$renderer =& $form->defaultRenderer();
$renderer->setElementTemplate('<span>{element}</span> ');
$form->addElement('text','keyword',get_lang('keyword'));
$form->addElement('submit','submit',get_lang('Search'));
$form->display();
// Create the sortable table with class information
$table = new SortableTable('classes', 'get_number_of_classes', 'get_class_data', 1);
$table->set_additional_parameters(array('keyword'=>$_GET['keyword']));
$table->set_header(0, '', false);
$table->set_header(1, get_lang('ClassName'));
$table->set_header(2, get_lang('NumberOfUsers'));
$table->set_header(3, '', false);
$table->set_column_filter(3, 'modify_filter');
$table->set_form_actions(array ('delete_classes' => get_lang('DeleteSelectedClasses')),'class');
$table->display();
/*
==============================================================================
		FOOTER
==============================================================================
*/
Display :: display_footer();
?>