File Source for class.php

<?php
// $Id: class.php 9119 2006-08-18 07:10:23Z bmol $
/*
==============================================================================
Dokeos - elearning and course management software
Copyright (c) 2004-2005 Dokeos S.A.
Copyright (c) Bart Mollet, Hogeschool Gent
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
==============================================================================
*/
/**
==============================================================================
* This script allows teachers to manage subscribed
*classes in their course.
* @package dokeos.user
==============================================================================
*/
/*
==============================================================================
INIT SECTION
==============================================================================
*/
// name of the language file that needs to be included
$language_file = array('registration','admin');
include ('../inc/global.inc.php');
$this_section = SECTION_COURSES;
require_once (api_get_path(LIBRARY_PATH).'course.lib.php');
require_once (api_get_path(LIBRARY_PATH).'sortabletable.class.php');
require_once (api_get_path(LIBRARY_PATH).'classmanager.lib.php');
require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
/*
==============================================================================
MAIN CODE
==============================================================================
*/
api_protect_course_script();
if(api_get_setting('use_session_mode')=='true')
{
api_not_allowed();
}
/*
-----------------------------------------------------------
Header
-----------------------------------------------------------
*/
$tool_name = get_lang("Classes");
//extra entries in breadcrumb
$interbreadcrumb[] = array ("url" => "user.php", "name" => get_lang("Users"));
Display :: display_header($tool_name, "User");
api_display_tool_title($tool_name);
if (api_is_allowed_to_edit())
{
echo '<a href="subscribe_class.php?'.api_get_cidreq().'">'.get_lang("AddClassesToACourse").'</a> ';
}
/*
==============================================================================
MAIN SECTION
==============================================================================
*/
if(api_is_allowed_to_edit())
{
if (isset ($_GET['unsubscribe']))
{
ClassManager::unsubscribe_from_course($_GET['class_id'],$_course['sysCode']);
Display::display_normal_message(get_lang('ClassesUnSubscribed'));
}
if (isset ($_POST['action']))
{
switch ($_POST['action'])
{
case 'unsubscribe' :
if (is_array($_POST['class']))
{
foreach ($_POST['class'] as $index => $class_id)
{
ClassManager::unsubscribe_from_course($class_id,$_course['sysCode']);
}
Display::display_normal_message(get_lang('ClassesUnSubscribed'));
}
break;
}
}
}
/*
-----------------------------------------------------------
SHOW LIST OF CLASSES
-----------------------------------------------------------
*/
/**
* * Get the number of classes to display on the current page.
*/
function get_number_of_classes()
{
$class_table = Database :: get_main_table(TABLE_MAIN_CLASS);
$course_class_table = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS);
$sql = "SELECT c.id FROM $class_table c, $course_class_table cc WHERE cc.class_id = c.id AND cc.course_code ='".$_SESSION['_course']['id']."'";
if (isset ($_GET['keyword']))
{
$keyword = mysql_real_escape_string($_GET['keyword']);
$sql .= " AND (c.name LIKE '%".$keyword."%')";
}
$res = api_sql_query($sql, __FILE__, __LINE__);
$result = mysql_num_rows($res);
return $result;
}
/**
* Get the classes to display on the current page.
*/
function get_class_data($from, $number_of_items, $column, $direction)
{
$class_table = Database :: get_main_table(TABLE_MAIN_CLASS);
$course_class_table = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS);
$class_user_table = Database :: get_main_table(TABLE_MAIN_CLASS_USER);
$sql = "SELECT
c.id AS col0,
c.name AS col1,
COUNT(cu.user_id) AS col2";
if (api_is_allowed_to_edit())
{
$sql .= " ,c.id AS col3";
}
// '(' and ')' in next query is necessary (see http://bugs.mysql.com/bug.php?id=19053)
$sql .= " FROM ($class_table c, $course_class_table cc)";
$sql .= " LEFT JOIN $class_user_table cu ON cu.class_id = c.id";
$sql .= " WHERE c.id = cc.class_id AND cc.course_code = '".$_SESSION['_course']['id']."'";
if (isset ($_GET['keyword']))
{
$keyword = mysql_real_escape_string($_GET['keyword']);
$sql .= " AND (c.name LIKE '%".$keyword."%')";
}
$sql .= " GROUP BY c.id, c.name ";
$sql .= " ORDER BY col$column $direction ";
$sql .= " LIMIT $from,$number_of_items";
$res = api_sql_query($sql, __FILE__, __LINE__);
$classes = array ();
while ($class = mysql_fetch_row($res))
{
$classes[] = $class;
}
return $classes;
}
/**
* Build the reg-column of the table
* @param int $class_id The class id
* @return string Some HTML-code
*/
function reg_filter($class_id)
{
global $charset;
$result = '<a href="'.api_get_self().'?'.api_get_cidreq().'&unsubscribe=yes&class_id='.$class_id.'" onclick="javascript:if(!confirm(\''.addslashes(htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)).'\')) return false;"><img src="../img/delete.gif"/></a>';
return $result;
}
// Build search-form
$form = new FormValidator('search_class', 'get','','',null,false);
$renderer = & $form->defaultRenderer();
$renderer->setElementTemplate('{element} ');
$form->add_textfield('keyword', '', false);
$form->addElement('submit', 'submit', get_lang('SearchButton'));
// Build table
$table = new SortableTable('users', 'get_number_of_classes', 'get_class_data', 1);
$parameters['keyword'] = $_GET['keyword'];
$table->set_additional_parameters($parameters);
$col = 0;
$table->set_header($col ++, '', false);
$table->set_header($col ++, get_lang('ClassName'));
$table->set_header($col ++, get_lang('NumberOfUsers'));
if (api_is_allowed_to_edit())
{
$table->set_header($col ++, '', false);
$table->set_column_filter($col -1, 'reg_filter');
$table->set_form_actions(array ('unsubscribe' => get_lang('Unreg')), 'class');
}
// Display form & table
$form->display();
echo ' ';
$table->display();
/*
==============================================================================
FOOTER
==============================================================================
*/
Display :: display_footer();
?>

Source for file class.php