File Source for index.php

<?php
/*
DOKEOS - elearning and course management software
For a full list of contributors, see documentation/credits.html
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 "documentation/licence.html" more details.
Contact:
Dokeos
Rue du Corbeau, 108
B-1030 Brussels - Belgium
Contact: info@dokeos.com
*/
/**
* @package dokeos.main
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Refactoring
* @version $Id: index.php 15173 2008-04-29 17:29:11Z yannoo $
* @todo check the different @todos in this page and really do them
* @todo check if the news management works as expected
*/
// only this script should have this constant defined. This is used to activate the javascript that
// gives the login name automatic focus in header.inc.html.
/** @todo Couldn't this be done using the $HtmlHeadXtra array? */
define('DOKEOS_HOMEPAGE', true);
// the language file
$language_file = array ('courses', 'index');
/* Flag forcing the 'current course' reset, as we're not inside a course anymore */
// maybe we should change this into an api function? an example: Coursemanager::unset();
$cidReset = true;
/*
-----------------------------------------------------------
Included libraries
-----------------------------------------------------------
*/
/** @todo make all the library files consistent, use filename.lib.php and not filename.lib.inc.php */
require_once ('main/inc/global.inc.php');
include_once (api_get_path(LIBRARY_PATH).'course.lib.php');
include_once (api_get_path(LIBRARY_PATH).'debug.lib.inc.php');
include_once (api_get_path(LIBRARY_PATH).'events.lib.inc.php');
include_once (api_get_path(LIBRARY_PATH).'system_announcements.lib.php');
include_once (api_get_path(LIBRARY_PATH).'groupmanager.lib.php');
include_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
$loginFailed = isset($_GET['loginFailed']) ? true : isset($loginFailed);
$setting_show_also_closed_courses = (api_get_setting('show_closed_courses')=='true') ? true : false;
// the section (for the tabs)
$this_section = SECTION_CAMPUS;
/*
-----------------------------------------------------------
Action Handling
-----------------------------------------------------------
*/
/** @todo wouldn't it make more sense if this would be done in local.inc.php so that local.inc.php become the only place where authentication is done?
* by doing this you could logout from any page instead of only from index.php. From the moment there is a logout=true in the url you will be logged out
* this can be usefull when you are on an open course and you need to log in to edit something and you immediately want to check how anonymous users
* will see it.
*/
if (!empty($_GET['logout']))
{
logout();
}
/*
-----------------------------------------------------------
Table definitions
-----------------------------------------------------------
*/
$main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
$main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
$track_login_table = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
/*
-----------------------------------------------------------
Constants and CONFIGURATION parameters
-----------------------------------------------------------
*/
/** @todo these configuration settings should move to the dokeos config settings */
/** defines wether or not anonymous visitors can see a list of the courses on the Dokeos homepage that are open to the world */
$_setting['display_courses_to_anonymous_users'] = 'true';
/** @todo remove this piece of code because this is not used */
if (isset ($_user['user_id']))
{
$nameTools = api_get_setting('siteName');
}
/*
==============================================================================
LOGIN
==============================================================================
*/
/**
* @todo This piece of code should probably move to local.inc.php where the actual login / logout procedure is handled.
* @todo consider removing this piece of code because does nothing.
*/
if (isset($_GET['submitAuth']) && $_GET['submitAuth'] == 1)
{
// nice lie!!!
echo 'Attempted breakin - sysadmins notified.';
session_destroy();
die();
}
/**
* @todo This piece of code should probably move to local.inc.php where the actual login procedure is handled.
* @todo check if this code is used. I think this code is never executed because after clicking the submit button
* the code does the stuff in local.inc.php and then redirects to index.php or user_portal.php depending
* on api_get_setting('page_after_login')
*/
if (!empty($_POST["submitAuth"]))
{
// the user is already authenticated, we now find the last login of the user.
if (isset ($_user['user_id']))
{
$sql_last_login = "SELECT UNIX_TIMESTAMP(login_date)
FROM $track_login_table
WHERE login_user_id = '".$_user['user_id']."'
ORDER BY login_date DESC LIMIT 1";
$result_last_login = api_sql_query($sql_last_login, __FILE__, __LINE__);
if (!$result_last_login)
if (mysql_num_rows($result_last_login) > 0)
{
$user_last_login_datetime = mysql_fetch_array($result_last_login);
$user_last_login_datetime = $user_last_login_datetime[0];
api_session_register('user_last_login_datetime');
}
mysql_free_result($result_last_login);
//event_login();
if (api_is_platform_admin())
{
// decode all open event informations and fill the track_c_* tables
include (api_get_path(LIBRARY_PATH)."stats.lib.inc.php");
decodeOpenInfos();
}
}
} // end login -- if($_POST["submitAuth"])
else
{
// only if login form was not sent because if the form is sent the user was already on the page.
event_open();
}
// the header
Display :: display_header('', 'dokeos');
/*
==============================================================================
MAIN CODE
==============================================================================
*/
echo '<div class="maincontent" id="content">';
// Plugins for loginpage_main AND campushomepage_main
if (!api_get_user_id())
{
api_plugin('loginpage_main');
}
else
{
api_plugin('campushomepage_main');
}
// Including the page for the news
$page_included = false;
if (!empty ($_GET['include']) && !strstr($_GET['include'], '/') && !strstr($_GET['include'], '\\') && strstr($_GET['include'], '.html'))
{
include ('./home/'.$_GET['include']);
$page_included = true;
}
else
{
if(!empty($_SESSION['user_language_choice']))
{
$user_selected_language=$_SESSION['user_language_choice'];
}
elseif(!empty($_SESSION['_user']['language']))
{
$user_selected_language=$_SESSION['_user']['language'];
}
else
{
$user_selected_language=get_setting('platformLanguage');
}
if(!file_exists('home/home_news_'.$user_selected_language.'.html'))
{
$home_top_temp=file('home/home_top.html');
$home_top_temp=implode('',$home_top_temp);
$open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
echo $open;
}
else
{
if(file_exists('home/home_top_'.$user_selected_language.'.html'))
{
$home_top_temp = file_get_contents('home/home_top_'.$user_selected_language.'.html');
}
else
{
$home_top_temp = file_get_contents('home/home_top.html');
}
$open=str_replace('{rel_path}',api_get_path(REL_PATH),$home_top_temp);
echo $open;
}
}
// Display System announcements
$announcement = isset($_GET['announcement']) ? $_GET['announcement'] : -1;
$announcement = intval($announcement);
if (isset($_user['user_id']))
{
$visibility = api_is_allowed_to_create_course() ? VISIBLE_TEACHER : VISIBLE_STUDENT;
SystemAnnouncementManager :: display_announcements($visibility, $announcement);
}
else
{
SystemAnnouncementManager :: display_announcements(VISIBLE_GUEST, $announcement);
}
// Display courses and category list
if (!$page_included)
{
if (api_get_setting('display_categories_on_homepage') == 'true')
{
echo '<div class="home_cats">';
display_anonymous_course_list();
echo '</div>';
}
}
echo '</div>';
// display right menu: language form, login section + useful weblinks
echo '<div class="menu" id="menu">';
display_anonymous_right_menu();
echo '</div>';
/*
==============================================================================
FOOTER
==============================================================================
*/
Display :: display_footer();
/**
* This function handles the logout and is called whenever there is a $_GET['logout']
*
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function logout()
{
global $_configuration, $extAuthSource;
// variable initialisation
$query_string='';
if(!empty($_SESSION['user_language_choice']))
{
$query_string='?language='.$_SESSION['user_language_choice'];
}
// Database table definition
$tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
// selecting the last login of the user
$uid = intval($_GET['uid']);
$sql_last_connection="SELECT login_id, login_date FROM $tbl_track_login WHERE login_user_id='$uid' ORDER BY login_date DESC LIMIT 0,1";
$q_last_connection=api_sql_query($sql_last_connection);
if(Database::num_rows($q_last_connection)>0)
{
$i_id_last_connection=mysql_result($q_last_connection,0,"login_id");
}
if(!isset($_SESSION['login_as']))
{
$s_sql_update_logout_date="UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
api_sql_query($s_sql_update_logout_date);
}
LoginDelete($uid, $_configuration['statistics_database']); //from inc/lib/online.inc.php - removes the "online" status
//the following code enables the use of an external logout function.
//example: define a $extAuthSource['ldap']['logout']="file.php" in configuration.php
// then a function called ldap_logout() inside that file
// (using *authent_name*_logout as the function name) and the following code
// will find and execute it
$uinfo = api_get_user_info($uid);
if(($uinfo['auth_source'] != PLATFORM_AUTH_SOURCE) && is_array($extAuthSource))
{
if(is_array($extAuthSource[$uinfo['auth_source']]))
{
$subarray = $extAuthSource[$uinfo['auth_source']];
if(!empty($subarray['logout']) && file_exists($subarray['logout']))
{
include_once($subarray['logout']);
$logout_function = $uinfo['auth_source'].'_logout';
if(function_exists($logout_function))
{
$logout_function($uinfo);
}
}
}
}
api_session_destroy();
header("Location: index.php$query_string");
exit();
}
/**
* This function checks if there are courses that are open to the world in the platform course categories (=faculties)
*
* @param unknown_type $category
* @return boolean
*/
function category_has_open_courses($category)
{
global $setting_show_also_closed_courses;
$user_identified = (api_get_user_id()>0 && !api_is_anonymous());
$main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
$sql_query = "SELECT * FROM $main_course_table WHERE category_code='$category'";
$sql_result = api_sql_query($sql_query, __FILE__, __LINE__);
while ($course = mysql_fetch_array($sql_result))
{
if ($setting_show_also_closed_courses == false)
{
if((api_get_user_id()>0
and $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
or ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD))
{
return true; //at least one open course
}
}
else
{
if(isset($course['visibility']))
{
return true; //at least one course (does not matter weither it's open or not because $setting_show_also_closed_courses = true
}
}
}
return false;
}
function display_create_course_link()
{
echo "<li><a href=\"main/create_course/add_course.php\">".get_lang("CourseCreate")."</a></li>";
}
function display_edit_course_list_links()
{
echo "<li><a href=\"main/auth/courses.php\">".get_lang("CourseManagement")."</a></li>";
}
/**
* Displays the right-hand menu for anonymous users:
* login form, useful links, help section
* Warning: function defines globals
* @version 1.0.1
* @todo does $_plugins need to be global?
*/
function display_anonymous_right_menu()
{
global $loginFailed, $_plugins, $_user, $menu_navigation;
$platformLanguage = api_get_setting('platformLanguage');
if ( !($_user['user_id']) or api_is_anonymous($_user['user_id']) ) // only display if the user isn't logged in
{
api_display_language_form();
echo '<br />';
display_login_form();
if ($loginFailed)
{
handle_login_failed();
}
if (api_get_setting('allow_lostpassword') == 'true' OR api_get_setting('allow_registration') == 'true')
{
echo '<div class="menusection"><span class="menusectioncaption">'.get_lang('MenuUser').'</span><ul class="menulist">';
if (get_setting('allow_registration') <> 'false')
{
echo '<li><a href="main/auth/inscription.php">'.get_lang('Reg').'</a></li>';
}
if (get_setting('allow_lostpassword') == 'true')
{
display_lost_password_info();
}
echo '</ul></div>';
}
if(api_number_of_plugins('loginpage_menu') > 0)
{
echo '<div class="note" style="background: none">';
api_plugin('loginpage_menu');
echo '</div>';
}
}
/*** hide right menu "general" and other parts on anonymous right menu *****/
echo "<div class=\"menusection\">", "<span class=\"menusectioncaption\">".get_lang("MenuGeneral")."</span>";
echo "<ul class=\"menulist\">";
$user_selected_language = api_get_interface_language();
if (!isset ($user_selected_language))
$user_selected_language = $platformLanguage;
if(!file_exists('home/home_menu_'.$user_selected_language.'.html'))
{
include ('home/home_menu.html');
}
else
{
include('home/home_menu_'.$user_selected_language.'.html');
}
echo '</ul>';
echo '</div>';
if ($_user['user_id'] && api_number_of_plugins('campushomepage_menu') > 0)
{
echo '<div class="note" style="background: none">';
api_plugin('campushomepage_menu');
echo '</div>';
}
/**
* User section
*/
if(isset($_SESSION['_user']['user_id']) && $_SESSION['_user']['user_id']!=0)
{
// tabs that are deactivated are added here
if (!empty($menu_navigation))
{
echo "<div class=\"menusection\">";
echo "<span class=\"menusectioncaption\">".get_lang("MainNavigation")."</span>";
echo "<ul class=\"menulist\">";
foreach($menu_navigation as $section => $navigation_info)
{
$current = ($section == $GLOBALS['this_section'] ? ' id="current"' : '');
echo '<li'.$current.'>';
echo '<a href="'.$navigation_info['url'].'" target="_top">'.$navigation_info['title'].'</a>';
echo '</li>';
echo "\n";
}
echo "</ul>";
echo '</div>';
}
echo "<div class=\"menusection\">";
echo "<span class=\"menusectioncaption\">".get_lang("MenuUser")."</span>";
echo "<ul class=\"menulist\">";
$display_add_course_link = api_is_allowed_to_create_course() && ($_SESSION["studentview"] != "studentenview");
if ($display_add_course_link)
display_create_course_link();
display_edit_course_list_links();
echo "</ul>";
echo "</div>";
}
// includes for any files to be displayed below anonymous right menu
if(!file_exists('home/home_notice_'.$user_selected_language.'.html') && file_get_contents('home/home_notice.html')!='')
{
echo '<div class="note">';
include ('home/home_notice.html');
echo '</div>';
}
elseif(file_exists('home/home_notice_'.$user_selected_language.'.html') && file_get_contents('home/home_notice_'.$user_selected_language.'.html')!='')
{
echo '<div class="note">';
include('home/home_notice_'.$user_selected_language.'.html');
echo '</div>';
}
}
/**
* Reacts on a failed login:
* displays an explanation with
* a link to the registration form.
*
* @version 1.0.1
*/
function handle_login_failed()
{
if(!isset($_GET['error']))
{
$message = get_lang("InvalidId");
if (api_is_self_registration_allowed())
{
$message = get_lang("InvalidForSelfRegistration");
}
}
else
{
switch ($_GET['error'])
{
case '':
$message = get_lang("InvalidId");
if (api_is_self_registration_allowed())
{
$message = get_lang("InvalidForSelfRegistration");
}
break;
case 'account_expired':
$message=get_lang('AccountExpired');
break;
case 'account_inactive':
$message=get_lang('AccountInactive');
break;
case 'user_password_incorrect':
$message=get_lang('InvalidId');
break;
}
}
echo "<div id=\"login_fail\">".$message."</div>";
}
/**
* Adds a form to let users login
* @version 1.1
*/
function display_login_form()
{
$form = new FormValidator('formLogin');
$form->addElement('text','login',get_lang('UserName'),array('size'=>15));
$form->addElement('password','password',get_lang('Pass'),array('size'=>15));
$form->addElement('submit','submitAuth',get_lang('Ok'));
$renderer =& $form->defaultRenderer();
$renderer->setElementTemplate('<div><label>{label}</label></div><div>{element}</div>');
$form->display();
if(api_get_setting('openid_authentication')=='true')
{
include_once('main/auth/openid/login.php');
echo '<div>'.openid_form().'</div>';
}
}
/**
* Displays a link to the lost password section
*/
function display_lost_password_info()
{
echo "<li><a href=\"main/auth/lostPassword.php\">".get_lang("LostPassword")."</a></li>";
}
/**
* Display list of courses in a category.
* (for anonymous users)
*
* @version 1.1
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University - refactoring and code cleaning
*/
function display_anonymous_course_list()
{
$ctok = $_SESSION['sec_token'];
$stok = Security::get_token();
//init
$user_identified = (api_get_user_id()>0 && !api_is_anonymous());
$web_course_path = api_get_path(WEB_COURSE_PATH);
$category = $_GET["category"];
global $setting_show_also_closed_courses;
// Database table definitions
$main_course_table = Database :: get_main_table(TABLE_MAIN_COURSE);
$main_category_table = Database :: get_main_table(TABLE_MAIN_CATEGORY);
$platformLanguage = api_get_setting('platformLanguage');
//get list of courses in category $category
$sql_get_course_list = "SELECT * FROM $main_course_table cours
WHERE category_code = '".mysql_real_escape_string($_GET["category"])."'
ORDER BY title, UPPER(visual_code)";
//removed: AND cours.visibility='".COURSE_VISIBILITY_OPEN_WORLD."'
$sql_result_courses = api_sql_query($sql_get_course_list, __FILE__, __LINE__);
while ($course_result = mysql_fetch_array($sql_result_courses))
{
$course_list[] = $course_result;
}
$platform_visible_courses = '';
// $setting_show_also_closed_courses
if($user_identified)
{
if ($setting_show_also_closed_courses)
{
$platform_visible_courses = '';
}
else
{
$platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' OR t3.visibility='".COURSE_VISIBILITY_OPEN_PLATFORM."' )";
}
}
else
{
if ($setting_show_also_closed_courses)
{
$platform_visible_courses = '';
}
else
{
$platform_visible_courses = " AND (t3.visibility='".COURSE_VISIBILITY_OPEN_WORLD."' )";
}
}
$sqlGetSubCatList = "
SELECT t1.name,t1.code,t1.parent_id,t1.children_count,COUNT(DISTINCT t3.code) AS nbCourse
FROM $main_category_table t1
LEFT JOIN $main_category_table t2 ON t1.code=t2.parent_id
LEFT JOIN $main_course_table t3 ON (t3.category_code=t1.code $platform_visible_courses)
WHERE t1.parent_id ". (empty ($category) ? "IS NULL" : "='$category'")."
GROUP BY t1.name,t1.code,t1.parent_id,t1.children_count ORDER BY t1.tree_pos, t1.name";
$resCats = api_sql_query($sqlGetSubCatList, __FILE__, __LINE__);
$thereIsSubCat = false;
if (mysql_num_rows($resCats) > 0)
{
$htmlListCat = "<h4 style=\"margin-top: 0px;\">".get_lang("CatList")."</h4>"."<ul>";
while ($catLine = mysql_fetch_array($resCats))
{
if ($catLine['code'] != $category)
{
$category_has_open_courses = category_has_open_courses($catLine['code']);
if ($category_has_open_courses)
{
//the category contains courses accessible to anonymous visitors
$htmlListCat .= "<li>";
$htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
if (api_get_setting('show_number_of_courses') == 'true')
{
$htmlListCat .= " (".$catLine['nbCourse']." ".get_lang("Courses").")";
}
$htmlListCat .= "</li>\n";
$thereIsSubCat = true;
}
elseif ($catLine['children_count'] > 0)
{
//the category has children, subcategories
$htmlListCat .= "<li>";
$htmlListCat .= "<a href=\"".api_get_self()."?category=".$catLine['code']."\">".$catLine['name']."</a>";
$htmlListCat .= "</li>\n";
$thereIsSubCat = true;
}
/************************************************************************
end changed code to eliminate the (0 courses) after empty categories
************************************************************************/
elseif (api_get_setting('show_empty_course_categories') == 'true')
{
$htmlListCat .= "<li>";
$htmlListCat .= $catLine['name'];
$htmlListCat .= "</li>\n";
$thereIsSubCat = true;
}//else don't set thereIsSubCat to true to avoid printing things if not requested
}
else
{
$htmlTitre = "<p>";
if (api_get_setting('show_back_link_on_top_of_tree') == 'true')
{
$htmlTitre .= "<a href=\"".api_get_self()."\">"."<< ".get_lang("BackToHomePage")."</a>";
}
if (!is_null($catLine['parent_id']) || (api_get_setting('show_back_link_on_top_of_tree') <> 'true' && !is_null($catLine['code'])))
{
$htmlTitre .= "<a href=\"".api_get_self()."?category=".$catLine['parent_id']."\">"."<< ".get_lang("Up")."</a>";
}
$htmlTitre .= "</p>\n";
if ($category != "" && !is_null($catLine['code']))
{
$htmlTitre .= "<h3>".$catLine['name']."</h3>\n";
}
else
{
$htmlTitre .= "<h3>".get_lang("Categories")."</h3>\n";
}
}
}
$htmlListCat .= "</ul>\n";
}
echo $htmlTitre;
if ($thereIsSubCat)
{
echo $htmlListCat;
}
while ($categoryName = mysql_fetch_array($resCats))
{
echo "<h3>", $categoryName['name'], "</h3>\n";
}
$numrows = mysql_num_rows($sql_result_courses);
$courses_list_string = '';
$courses_shown = 0;
if ($numrows > 0)
{
if ($thereIsSubCat)
{
$courses_list_string .= "<hr size=\"1\" noshade=\"noshade\">\n";
}
$courses_list_string .= "<h4 style=\"margin-top: 0px;\">".get_lang("CourseList")."</h4>\n"."<ul>\n";
if (api_get_user_id())
{
$courses_of_user = get_courses_of_user(api_get_user_id());
}
foreach ($course_list AS $course)
{
// $setting_show_also_closed_courses
if ($setting_show_also_closed_courses==false)
{
// if we do not show the closed courses
// we only show the courses that are open to the world (to everybody)
// and the courses that are open to the platform (if the current user is a registered user
if( ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM) OR ($course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD))
{
$courses_shown++;
$courses_list_string .= "<li>\n";
$courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">".$course['title']."</a><br />";
if (get_setting("display_coursecode_in_courselist") == "true")
{
$courses_list_string .= $course['visual_code'];
}
if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true")
{
$courses_list_string .= " - ";
}
if (get_setting("display_teacher_in_courselist") == "true")
{
$courses_list_string .= $course['tutor_name'];
}
if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage'))
{
$courses_list_string .= ' - '.$course['course_language'];
}
$courses_list_string .= "</li>\n";
}
}
// we DO show the closed courses.
// the course is accessible if (link to the course homepage)
// 1. the course is open to the world (doesn't matter if the user is logged in or not): $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD)
// 2. the user is logged in and the course is open to the world or open to the platform: ($user_identified && $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
// 3. the user is logged in and the user is subscribed to the course and the course visibility is not COURSE_VISIBILITY_CLOSED
// 4. the user is logged in and the user is course admin of te course (regardless of the course visibility setting)
// 5. the user is the platform admin api_is_platform_admin()
//
else
{
$courses_shown++;
$courses_list_string .= "<li>\n";
if( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
OR $courses_of_user[$course['code']]['status'] == '1'
OR api_is_platform_admin())
{
$courses_list_string .= "<a href=\"".$web_course_path.$course['directory']."/\">";
}
$courses_list_string .= $course['title'];
if( $course['visibility'] == COURSE_VISIBILITY_OPEN_WORLD
OR ($user_identified AND $course['visibility'] == COURSE_VISIBILITY_OPEN_PLATFORM)
OR ($user_identified AND key_exists($course['code'],$courses_of_user) AND $course['visibility'] <> COURSE_VISIBILITY_CLOSED)
OR $courses_of_user[$course['code']]['status'] == '1'
OR api_is_platform_admin())
{
$courses_list_string .="</a><br />";
}
if (get_setting("display_coursecode_in_courselist") == "true")
{
$courses_list_string .= $course['visual_code'];
}
if (get_setting("display_coursecode_in_courselist") == "true" AND get_setting("display_teacher_in_courselist") == "true")
{
$courses_list_string .= " - ";
}
if (get_setting("display_teacher_in_courselist") == "true")
{
$courses_list_string .= $course['tutor_name'];
}
if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage'))
{
$courses_list_string .= ' - '.$course['course_language'];
}
if (api_get_setting('show_different_course_language') == 'true' && $course['course_language'] <> api_get_setting('platformLanguage'))
{
$courses_list_string .= ' - '.$course['course_language'];
}
// We display a subscription link if
// 1. it is allowed to register for the course and if the course is not already in the courselist of the user and if the user is identiefied
// 2
if ($user_identified AND !key_exists($course['code'],$courses_of_user))
{
if ($course['subscribe'] == '1')
{
$courses_list_string .= "<form action=\"main/auth/courses.php?action=subscribe&category=".$_GET['category']."\" method=\"post\">";
$courses_list_string .= '<input type="hidden" name="sec_token" value="'.$stok.'">';
$courses_list_string .= "<input type=\"hidden\" name=\"subscribe\" value=\"".$course['code']."\" />";
$courses_list_string .= "<input type=\"image\" name=\"unsub\" src=\"main/img/enroll.gif\" alt=\"".get_lang("Subscribe")."\" />".get_lang("Subscribe")."</form>";
}
else
{
$courses_list_string .= '<br />'.get_lang("SubscribingNotAllowed");
}
}
$courses_list_string .= "</li>\n";
}
}
$courses_list_string .= "</ul>\n";
}
else
{
// echo "<blockquote>",get_lang('_No_course_publicly_available'),"</blockquote>\n";
}
if($courses_shown > 0)
{ //only display the list of courses and categories if there was more than
// 0 courses visible to the world (we're in the anonymous list here)
echo $courses_list_string;
}
if ($category != "")
{
echo "<p>", "<a href=\"".api_get_self()."\"><b><<</b> ", get_lang("BackToHomePage"), "</a>", "</p>\n";
}
}
/**
* retrieves all the courses that the user has already subscribed to
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University, Belgium
* @param int $user_id: the id of the user
* @return array an array containing all the information of the courses of the given user
*/
function get_courses_of_user($user_id)
{
$table_course = Database::get_main_table(TABLE_MAIN_COURSE);
$table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
// Secondly we select the courses that are in a category (user_course_cat<>0) and sort these according to the sort of the category
$user_id = intval($user_id);
$sql_select_courses="SELECT course.code k, course.visual_code vc, course.subscribe subscr, course.unsubscribe unsubscr,
course.title i, course.tutor_name t, course.db_name db, course.directory dir, course_rel_user.status status,
course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat
FROM $table_course course,
$table_course_user course_rel_user
WHERE course.code = course_rel_user.course_code
AND course_rel_user.user_id = '".$user_id."'
ORDER BY course_rel_user.sort ASC";
$result = api_sql_query($sql_select_courses,__FILE__,__LINE__);
while ($row=Database::fetch_array($result))
{
// we only need the database name of the course
$courses[$row['k']] = array("db"=> $row['db'], "code" => $row['k'], "visual_code" => $row['vc'], "title" => $row['i'], "directory" => $row['dir'], "status" => $row['status'], "tutor" => $row['t'], "subscribe" => $row['subscr'], "unsubscribe" => $row['unsubscr'], "sort" => $row['sort'], "user_course_category" => $row['user_course_cat']);
}
return $courses;
}
?>

Source for file index.php