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";
	$res = Database::query($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) {
	$class_id = Security::remove_XSS($class_id);
	$result = ''.Display::return_icon('synthese_view.gif', get_lang('Info')).'';
	$result .= ''.Display::return_icon('edit.gif', get_lang('Edit')).'';
	$result .= ''.Display::return_icon('delete.gif', get_lang('Delete')).'';
	$result .= ''.Display::return_icon('add_multiple_users.gif', get_lang('AddUsersToAClass')).'';
	return $result;
}
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($_GET['class_id']);
			Display :: display_normal_message(get_lang('ClassDeleted'));
			break;
		case 'show_message':
			Display :: display_normal_message(Security::remove_XSS(stripslashes($_GET['message'])));
			break;
	}
}
// Create a search-box
$form = new FormValidator('search_simple', 'get', '', '', null, false);
$renderer =& $form->defaultRenderer();
$renderer->setElementTemplate('{element} ');
$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();
// Displaying the footer.
Display :: display_footer();