You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1711 lines
51 KiB
1711 lines
51 KiB
<?php
|
|
/*
|
|
===============================================================================
|
|
Dokeos - elearning and course management software
|
|
|
|
Copyright (c) 2004-2005 Dokeos S.A.
|
|
Copyright (c) 2003 Ghent University (UGent)
|
|
Copyright (c) 2001 Universite catholique de Louvain (UCL)
|
|
Copyright (c) Hugues Peeters
|
|
Copyright (c) Christophe Gesche
|
|
Copyright (c) Roan Embrechts (Vrije Universiteit Brussel)
|
|
Copyright (c) Patrick Cool
|
|
Copyright (c) Olivier Brouckaert
|
|
Copyright (c) Toon Van Hoecke
|
|
Copyright (c) Denes Nagy
|
|
|
|
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 is a code library for Dokeos.
|
|
* It is included by default in every Dokeos file
|
|
* (through including the global.inc.php)
|
|
*
|
|
* @package dokeos.library
|
|
==============================================================================
|
|
*/
|
|
/*
|
|
==============================================================================
|
|
CONSTANTS
|
|
==============================================================================
|
|
*/
|
|
|
|
//USER STATUS CONSTANTS
|
|
/** global status of a user: student */
|
|
define('STUDENT', 5);
|
|
/** global status of a user: course manager */
|
|
define('COURSEMANAGER', 1);
|
|
|
|
//COURSE VISIBILITY CONSTANTS
|
|
/** only visible for course admin */
|
|
define('COURSE_VISIBILITY_CLOSED', 0);
|
|
/** only visible for users registered in the course*/
|
|
define('COURSE_VISIBILITY_REGISTERED', 1);
|
|
/** open for all registered users on the platform */
|
|
define('COURSE_VISIBILITY_OPEN_PLATFORM', 2);
|
|
/** open for the whole world */
|
|
define('COURSE_VISIBILITY_OPEN_WORLD', 3);
|
|
|
|
define('SUBSCRIBE_ALLOWED', 1);
|
|
define('SUBSCRIBE_NOT_ALLOWED', 0);
|
|
define('UNSUBSCRIBE_ALLOWED', 1);
|
|
define('UNSUBSCRIBE_NOT_ALLOWED', 0);
|
|
|
|
//CONSTANTS FOR api_get_path FUNCTION
|
|
define('WEB_PATH', 'WEB_PATH');
|
|
define('SYS_PATH', 'SYS_PATH');
|
|
define('REL_PATH', 'REL_PATH');
|
|
define('WEB_COURSE_PATH', 'WEB_COURSE_PATH');
|
|
define('SYS_COURSE_PATH', 'SYS_COURSE_PATH');
|
|
define('REL_COURSE_PATH', 'REL_COURSE_PATH');
|
|
define('REL_CLARO_PATH', 'REL_CLARO_PATH');
|
|
define('WEB_CODE_PATH', 'WEB_CODE_PATH');
|
|
define('SYS_CODE_PATH', 'SYS_CODE_PATH');
|
|
define('SYS_LANG_PATH', 'SYS_LANG_PATH');
|
|
define('WEB_IMG_PATH', 'WEB_IMG_PATH');
|
|
define('WEB_CSS_PATH', 'WEB_CSS_PATH');
|
|
define('GARBAGE_PATH', 'GARBAGE_PATH');
|
|
define('SYS_PLUGIN_PATH', 'SYS_PLUGIN_PATH');
|
|
define('PLUGIN_PATH', 'PLUGIN_PATH');
|
|
define('WEB_PLUGIN_PATH', 'WEB_PLUGIN_PATH');
|
|
define('SYS_ARCHIVE_PATH', 'SYS_ARCHIVE_PATH');
|
|
define('INCLUDE_PATH', 'INCLUDE_PATH');
|
|
define('LIBRARY_PATH', 'LIBRARY_PATH');
|
|
define('CONFIGURATION_PATH', 'CONFIGURATION_PATH');
|
|
|
|
//CONSTANTS defining all tools, using the english version
|
|
define('TOOL_DOCUMENT', 'document');
|
|
define('TOOL_CALENDAR_EVENT', 'calendar_event');
|
|
define('TOOL_LINK', 'link');
|
|
define('TOOL_COURSE_DESCRIPTION', 'course_description');
|
|
define('TOOL_LEARNPATH', 'learnpath');
|
|
define('TOOL_ANNOUNCEMENT', 'announcement');
|
|
define('TOOL_FORUM', 'forum');
|
|
define('TOOL_THREAD', 'thread');
|
|
define('TOOL_POST', 'post');
|
|
define('TOOL_DROPBOX', 'dropbox');
|
|
define('TOOL_QUIZ', 'quiz');
|
|
define('TOOL_USER', 'user');
|
|
define('TOOL_GROUP', 'group');
|
|
define('TOOL_BLOGS', 'blog_management'); // Smartblogs (Kevin Van Den Haute :: kevin@develop-it.be)
|
|
define('TOOL_CHAT', 'chat');
|
|
define('TOOL_CONFERENCE', 'conference');
|
|
define('TOOL_STUDENTPUBLICATION', 'student_publication');
|
|
define('TOOL_TRACKING', 'tracking');
|
|
define('TOOL_HOMEPAGE_LINK', 'homepage_link');
|
|
define('TOOL_COURSE_SETTING', 'course_setting');
|
|
define('TOOL_BACKUP', 'backup');
|
|
define('TOOL_COPY_COURSE_CONTENT', 'copy_course_content');
|
|
define('TOOL_RECYCLE_COURSE', 'recycle_course');
|
|
define('TOOL_COURSE_HOMEPAGE', 'course_homepage');
|
|
define('TOOL_COURSE_RIGHTS_OVERVIEW', 'course_rights');
|
|
define('TOOL_UPLOAD','file_upload');
|
|
define('TOOL_COURSE_MAINTENANCE','course_maintenance');
|
|
define('TOOL_VISIO','visio');
|
|
define('TOOL_SURVEY','survey');
|
|
|
|
// CONSTANTS defining dokeos sections
|
|
define('SECTION_CAMPUS', 'mycampus');
|
|
define('SECTION_COURSES', 'mycourses');
|
|
define('SECTION_MYPROFILE', 'myprofile');
|
|
define('SECTION_MYAGENDA', 'myagenda');
|
|
define('SECTION_COURSE_ADMIN', 'course_admin');
|
|
define('SECTION_PLATFORM_ADMIN', 'platform_admin');
|
|
|
|
// CONSTANT name for local authentication source
|
|
define('PLATFORM_AUTH_SOURCE', 'platform');
|
|
|
|
/*
|
|
==============================================================================
|
|
PROTECTION FUNCTIONS
|
|
use these to protect your scripts
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Function used to protect a course script.
|
|
* The function blocks access when
|
|
* - there is no $_SESSION["_course"] defined; or
|
|
* - $is_allowed_in_course is set to false (this depends on the course
|
|
* visibility and user status).
|
|
*
|
|
* This is only the first proposal, test and improve!
|
|
*
|
|
* @todo replace global variable
|
|
* @author Roan Embrechts
|
|
*/
|
|
function api_protect_course_script()
|
|
{
|
|
global $is_allowed_in_course;
|
|
if (!isset ($_SESSION["_course"]) || !$is_allowed_in_course)
|
|
{
|
|
include (api_get_path(INCLUDE_PATH)."header.inc.php");
|
|
api_not_allowed();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Function used to protect an admin script.
|
|
* The function blocks access when the user has no platform admin rights.
|
|
* This is only the first proposal, test and improve!
|
|
*
|
|
* @author Roan Embrechts
|
|
*/
|
|
function api_protect_admin_script()
|
|
{
|
|
if (!api_is_platform_admin())
|
|
{
|
|
include (api_get_path(INCLUDE_PATH)."header.inc.php");
|
|
api_not_allowed();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Function used to prevent anonymous users from accessing a script.
|
|
*
|
|
* @author Roan Embrechts
|
|
*/
|
|
function api_block_anonymous_users()
|
|
{
|
|
global $_user;
|
|
|
|
if (!(isset ($_user['user_id']) && $_user['user_id']))
|
|
{
|
|
include (api_get_path(INCLUDE_PATH)."header.inc.php");
|
|
api_not_allowed();
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
ACCESSOR FUNCTIONS
|
|
don't access kernel variables directly,
|
|
use these functions instead
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* @return an array with the navigator name and version
|
|
*/
|
|
function api_get_navigator()
|
|
{
|
|
$navigator = 'Unknown';
|
|
$version = 0;
|
|
if (strstr($_SERVER['HTTP_USER_AGENT'], 'Opera'))
|
|
{
|
|
$navigator = 'Opera';
|
|
list (, $version) = explode('Opera', $_SERVER['HTTP_USER_AGENT']);
|
|
}
|
|
elseif (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE'))
|
|
{
|
|
$navigator = 'Internet Explorer';
|
|
list (, $version) = explode('MSIE', $_SERVER['HTTP_USER_AGENT']);
|
|
}
|
|
elseif (strstr($_SERVER['HTTP_USER_AGENT'], 'Gecko'))
|
|
{
|
|
$navigator = 'Mozilla';
|
|
list (, $version) = explode('; rv:', $_SERVER['HTTP_USER_AGENT']);
|
|
}
|
|
elseif (strstr($_SERVER['HTTP_USER_AGENT'], 'Netscape'))
|
|
{
|
|
$navigator = 'Netscape';
|
|
list (, $version) = explode('Netscape', $_SERVER['HTTP_USER_AGENT']);
|
|
}
|
|
$version = doubleval($version);
|
|
if (!strstr($version, '.'))
|
|
{
|
|
$version = number_format(doubleval($version), 1);
|
|
}
|
|
return array ('name' => $navigator, 'version' => $version);
|
|
}
|
|
/**
|
|
* @return True if user selfregistration is allowed, false otherwise.
|
|
*/
|
|
function api_is_self_registration_allowed()
|
|
{
|
|
return $GLOBALS["allowSelfReg"];
|
|
}
|
|
/**
|
|
* Returns a full path to a certain Dokeos area, which you specify
|
|
* through a parameter.
|
|
*
|
|
* See $_configuration['course_folder'] in the configuration.php
|
|
* to alter the WEB_COURSE_PATH and SYS_COURSE_PATH parameters.
|
|
*
|
|
* @param one of the following constants:
|
|
* WEB_PATH, SYS_PATH, REL_PATH, WEB_COURSE_PATH, SYS_COURSE_PATH,
|
|
* REL_COURSE_PATH, REL_CLARO_PATH, WEB_CODE_PATH, SYS_CODE_PATH,
|
|
* SYS_LANG_PATH, WEB_IMG_PATH, GARBAGE_PATH, PLUGIN_PATH, SYS_ARCHIVE_PATH,
|
|
* INCLUDE_PATH, LIBRARY_PATH, CONFIGURATION_PATH
|
|
*
|
|
* @example assume that your server root is /var/www/ dokeos is installed in a subfolder dokeos/ and the URL of your campus is http://www.mydokeos.com
|
|
* The other configuration paramaters have not been changed.
|
|
* The different api_get_paths will give
|
|
* WEB_PATH http://www.mydokeos.com
|
|
* SYS_PATH /var/www/
|
|
* REL_PATH dokeos/
|
|
* WEB_COURSE_PATH http://www.mydokeos.com/courses/
|
|
* SYS_COURSE_PATH /var/www/dokeos/courses/
|
|
* REL_COURSE_PATH
|
|
* REL_CLARO_PATH
|
|
* WEB_CODE_PATH
|
|
* SYS_CODE_PATH
|
|
* SYS_LANG_PATH
|
|
* WEB_IMG_PATH
|
|
* GARBAGE_PATH
|
|
* PLUGIN_PATH
|
|
* SYS_ARCHIVE_PATH
|
|
* INCLUDE_PATH
|
|
* LIBRARY_PATH
|
|
* CONFIGURATION_PATH
|
|
*/
|
|
function api_get_path($path_type)
|
|
{
|
|
global $_configuration;
|
|
|
|
switch ($path_type)
|
|
{
|
|
case WEB_PATH :
|
|
// example: http://www.mydokeos.com
|
|
return $_configuration['root_web'];
|
|
break;
|
|
|
|
case SYS_PATH :
|
|
// example: /var/www/
|
|
return $_configuration['root_sys'];
|
|
break;
|
|
|
|
case REL_PATH :
|
|
// example: dokeos/
|
|
if (substr($_configuration['url_append'], -1) === '/')
|
|
{
|
|
return $_configuration['url_append'];
|
|
}
|
|
else
|
|
{
|
|
return $_configuration['url_append'].'/';
|
|
}
|
|
break;
|
|
|
|
case WEB_COURSE_PATH :
|
|
// example: http://www.mydokeos.com/courses/
|
|
return $_configuration['root_web'].$_configuration['course_folder'];
|
|
break;
|
|
|
|
case SYS_COURSE_PATH :
|
|
// example: /var/www/dokeos/courses/
|
|
return $_configuration['root_sys'].$_configuration['course_folder'];
|
|
break;
|
|
|
|
case REL_COURSE_PATH :
|
|
return api_get_path(REL_PATH).$_configuration['course_folder'];
|
|
break;
|
|
case REL_CLARO_PATH :
|
|
return api_get_path(REL_PATH).$_configuration['code_append'];
|
|
break;
|
|
case WEB_CODE_PATH :
|
|
return $GLOBALS['clarolineRepositoryWeb'];
|
|
break;
|
|
case SYS_CODE_PATH :
|
|
return $GLOBALS['clarolineRepositorySys'];
|
|
break;
|
|
case SYS_LANG_PATH :
|
|
return api_get_path(SYS_CODE_PATH).'lang/';
|
|
break;
|
|
case WEB_IMG_PATH :
|
|
return api_get_path(WEB_CODE_PATH).'img/';
|
|
break;
|
|
case GARBAGE_PATH :
|
|
return $GLOBALS['garbageRepositorySys'];
|
|
break;
|
|
case SYS_PLUGIN_PATH :
|
|
return api_get_path(SYS_PATH).'plugin/';
|
|
break;
|
|
case WEB_PLUGIN_PATH :
|
|
return api_get_path(WEB_PATH).'plugin/';
|
|
break;
|
|
case SYS_ARCHIVE_PATH :
|
|
return api_get_path(SYS_PATH).'archive/';
|
|
break;
|
|
case INCLUDE_PATH :
|
|
return str_replace('\\', '/', $GLOBALS['includePath']).'/';
|
|
break;
|
|
case LIBRARY_PATH :
|
|
return api_get_path(INCLUDE_PATH).'lib/';
|
|
break;
|
|
case WEB_LIBRARY_PATH :
|
|
return api_get_path(WEB_CODE_PATH).'inc/lib/';
|
|
break;
|
|
case CONFIGURATION_PATH :
|
|
return api_get_path(INCLUDE_PATH).'conf/';
|
|
break;
|
|
default :
|
|
return;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function returns the id of the user which is stored in the $_user array.
|
|
*
|
|
* @example The function can be used to check if a user is logged in
|
|
* if (api_get_user_id())
|
|
* @return integer the id of the current user
|
|
*/
|
|
function api_get_user_id()
|
|
{
|
|
return $GLOBALS['_user']['user_id'];
|
|
}
|
|
/**
|
|
* @param $user_id (integer): the id of the user
|
|
* @return $user_info (array): user_id, lastname, firstname, username, email, ...
|
|
* @author Patrick Cool <patrick.cool@UGent.be>
|
|
* @version 21 September 2004
|
|
* @desc find all the information about a user. If no paramater is passed you find all the information about the current user.
|
|
*/
|
|
function api_get_user_info($user_id = '')
|
|
{
|
|
global $tbl_user;
|
|
if ($user_id == '')
|
|
{
|
|
return $GLOBALS["_user"];
|
|
}
|
|
else
|
|
{
|
|
$sql = "SELECT * FROM ".Database :: get_main_table(TABLE_MAIN_USER)." WHERE user_id='".mysql_real_escape_string($user_id)."'";
|
|
$result = api_sql_query($sql, __FILE__, __LINE__);
|
|
if(mysql_num_rows($result) > 0)
|
|
{
|
|
$result_array = mysql_fetch_array($result);
|
|
// this is done so that it returns the same array-index-names
|
|
// ideally the names of the fields of the user table are renamed so that they match $_user (or vice versa)
|
|
// $_user should also contain every field of the user table (except password maybe). This would make the
|
|
// following lines obsolete (and the code cleaner and slimmer !!!
|
|
$user_info['firstName'] = $result_array['firstname'];
|
|
$user_info['lastName'] = $result_array['lastname'];
|
|
$user_info['mail'] = $result_array['email'];
|
|
$user_info['picture_uri'] = $result_array['picture_uri'];
|
|
$user_info['user_id'] = $result_array['user_id'];
|
|
$user_info['official_code'] = $result_array['official_code'];
|
|
$user_info['status'] = $result_array['status'];
|
|
return $user_info;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
/**
|
|
* Returns the current course id (integer)
|
|
*/
|
|
function api_get_course_id()
|
|
{
|
|
return $GLOBALS["_cid"];
|
|
}
|
|
/**
|
|
* Returns the current course directory
|
|
*
|
|
* This function relies on api_get_course_info()
|
|
* @return string The directory where the course is located inside the Dokeos "courses" directory
|
|
* @author Yannick Warnier <yannick.warnier@dokeos.com>
|
|
*/
|
|
function api_get_course_path()
|
|
{
|
|
$info = api_get_course_info();
|
|
return $info['path'];
|
|
}
|
|
/**
|
|
* Gets a course setting from the current course_setting table. Try always using integer values.
|
|
* @param string The name of the setting we want from the table
|
|
* @return mixed The value of that setting in that table. Return -1 if not found.
|
|
*/
|
|
function api_get_course_setting($setting_name)
|
|
{
|
|
$table = Database::get_course_table(TABLE_COURSE_SETTING);
|
|
$setting_name = mysql_real_escape_string($setting_name);
|
|
$sql = "SELECT * FROM $table WHERE variable = '$setting_name'";
|
|
$res = api_sql_query($sql,__FILE__,__LINE__);
|
|
if(Database::num_rows($res)==1){
|
|
$row = Database::fetch_array($res);
|
|
return $row['value'];
|
|
}
|
|
return -1;
|
|
}
|
|
/**
|
|
* Returns the cidreq parameter name + current course id
|
|
*/
|
|
function api_get_cidreq()
|
|
{
|
|
if (!empty ($GLOBALS["_cid"]))
|
|
{
|
|
return 'cidReq='.$GLOBALS["_cid"];
|
|
}
|
|
return '';
|
|
}
|
|
/**
|
|
* Returns the current course info array.
|
|
* Note: this array is only defined if the user is inside a course.
|
|
* Array elements:
|
|
* ['name']
|
|
* ['official_code']
|
|
* ['sysCode']
|
|
* ['path']
|
|
* ['dbName']
|
|
* ['dbNameGlu']
|
|
* ['titular']
|
|
* ['language']
|
|
* ['extLink']['url' ]
|
|
* ['extLink']['name']
|
|
* ['categoryCode']
|
|
* ['categoryName']
|
|
*
|
|
* @todo same behaviour as api_get_user_info so that api_get_course_id becomes absolete too
|
|
*/
|
|
function api_get_course_info()
|
|
{
|
|
global $_course;
|
|
return $_course;
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
DATABASE QUERY MANAGEMENT
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Executes an SQL query
|
|
* You have to use addslashes() on each value that you want to record into the database
|
|
*
|
|
* @author Olivier Brouckaert
|
|
* @param string $query - SQL query
|
|
* @param string $file - optional, the file path and name of the error (__FILE__)
|
|
* @param string $line - optional, the line of the error (__LINE__)
|
|
* @return resource - the return value of the query
|
|
*/
|
|
function api_sql_query($query, $file = '', $line = 0)
|
|
{
|
|
$result = mysql_query($query);
|
|
|
|
if ($line && !$result)
|
|
{
|
|
if (api_get_setting('server_type') !== 'test')
|
|
{
|
|
@ mysql_close();
|
|
die('SQL error in file <b>'.$file.'</b> at line <b>'.$line.'</b>');
|
|
}
|
|
else
|
|
{
|
|
$info = '<pre>';
|
|
$info .= '<b>MYSQL ERROR :</b><br/> ';
|
|
$info .= mysql_error();
|
|
$info .= '<br/>';
|
|
$info .= '<b>QUERY :</b><br/> ';
|
|
$info .= $query;
|
|
$info .= '<br/>';
|
|
$info .= '<b>FILE :</b><br/> ';
|
|
$info .= ($file == '' ? ' unknown ' : $file);
|
|
$info .= '<br/>';
|
|
$info .= '<b>LINE :</b><br/> ';
|
|
$info .= ($line == 0 ? ' unknown ' : $line);
|
|
$info .= '</pre>';
|
|
@ mysql_close();
|
|
die($info);
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
/**
|
|
* Store the result of a query into an array
|
|
*
|
|
* @author Olivier Brouckaert
|
|
* @param resource $result - the return value of the query
|
|
* @return array - the value returned by the query
|
|
*/
|
|
function api_store_result($result)
|
|
{
|
|
$tab = array ();
|
|
while ($row = mysql_fetch_array($result))
|
|
{
|
|
$tab[] = $row;
|
|
}
|
|
return $tab;
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
SESSION MANAGEMENT
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* start the dokeos session
|
|
*
|
|
* @author Olivier Brouckaert
|
|
* @param string variable - the variable name to save into the session
|
|
*/
|
|
function api_session_start($already_installed = true)
|
|
{
|
|
global $storeSessionInDb;
|
|
if($already_installed){
|
|
session_set_cookie_params(3600,api_get_path(REL_PATH));
|
|
}
|
|
if (is_null($storeSessionInDb))
|
|
{
|
|
$storeSessionInDb = false;
|
|
}
|
|
if ($storeSessionInDb && function_exists('session_set_save_handler'))
|
|
{
|
|
include_once (api_get_path(LIBRARY_PATH).'session_handler.class.php');
|
|
$session_handler = new session_handler();
|
|
@ session_set_save_handler(array (& $session_handler, 'open'), array (& $session_handler, 'close'), array (& $session_handler, 'read'), array (& $session_handler, 'write'), array (& $session_handler, 'destroy'), array (& $session_handler, 'garbage'));
|
|
}
|
|
session_name('dk_sid');
|
|
session_start();
|
|
if ($already_installed)
|
|
{
|
|
if (empty ($_SESSION['checkDokeosURL']))
|
|
{
|
|
$_SESSION['checkDokeosURL'] = api_get_path(WEB_PATH);
|
|
}
|
|
elseif ($_SESSION['checkDokeosURL'] != api_get_path(WEB_PATH))
|
|
{
|
|
api_session_clear();
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* save a variable into the session
|
|
*
|
|
* BUG: function works only with global variables
|
|
*
|
|
* @author Olivier Brouckaert
|
|
* @param string variable - the variable name to save into the session
|
|
*/
|
|
function api_session_register($variable)
|
|
{
|
|
global $$variable;
|
|
session_register($variable);
|
|
$_SESSION[$variable] = $$variable;
|
|
}
|
|
/**
|
|
* Remove a variable from the session.
|
|
*
|
|
* @author Olivier Brouckaert
|
|
* @param string variable - the variable name to remove from the session
|
|
*/
|
|
function api_session_unregister($variable)
|
|
{
|
|
session_unregister($variable);
|
|
$_SESSION[$variable] = null;
|
|
unset ($GLOBALS[$variable]);
|
|
}
|
|
/**
|
|
* Clear the session
|
|
*
|
|
* @author Olivier Brouckaert
|
|
*/
|
|
function api_session_clear()
|
|
{
|
|
session_regenerate_id();
|
|
session_unset();
|
|
$_SESSION = array ();
|
|
}
|
|
/**
|
|
* Destroy the session
|
|
*
|
|
* @author Olivier Brouckaert
|
|
*/
|
|
function api_session_destroy()
|
|
{
|
|
session_unset();
|
|
$_SESSION = array ();
|
|
session_destroy();
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
STRING MANAGEMENT
|
|
==============================================================================
|
|
*/
|
|
function api_add_url_param($url, $param)
|
|
{
|
|
if (empty ($param))
|
|
{
|
|
return $url;
|
|
}
|
|
if (strstr($url, '?'))
|
|
{
|
|
if ($param[0] != '&')
|
|
{
|
|
$param = '&'.$param;
|
|
}
|
|
list (, $query_string) = explode('?', $url);
|
|
$param_list1 = explode('&', $param);
|
|
$param_list2 = explode('&', $query_string);
|
|
$param_list1_keys = $param_list1_vals = array ();
|
|
foreach ($param_list1 as $key => $enreg)
|
|
{
|
|
list ($param_list1_keys[$key], $param_list1_vals[$key]) = explode('=', $enreg);
|
|
}
|
|
$param_list1 = array ('keys' => $param_list1_keys, 'vals' => $param_list1_vals);
|
|
foreach ($param_list2 as $enreg)
|
|
{
|
|
$enreg = explode('=', $enreg);
|
|
$key = array_search($enreg[0], $param_list1['keys']);
|
|
if (!is_null($key) && !is_bool($key))
|
|
{
|
|
$url = str_replace($enreg[0].'='.$enreg[1], $enreg[0].'='.$param_list1['vals'][$key], $url);
|
|
$param = str_replace('&'.$enreg[0].'='.$param_list1['vals'][$key], '', $param);
|
|
}
|
|
}
|
|
$url .= $param;
|
|
}
|
|
else
|
|
{
|
|
$url = $url.'?'.$param;
|
|
}
|
|
return $url;
|
|
}
|
|
/**
|
|
* Returns a difficult to guess password.
|
|
* @param int $length, the length of the password
|
|
* @return string the generated password
|
|
*/
|
|
function api_generate_password($length = 8)
|
|
{
|
|
$characters = 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789';
|
|
if ($length < 2)
|
|
{
|
|
$length = 2;
|
|
}
|
|
$password = '';
|
|
for ($i = 0; $i < $length; $i ++)
|
|
{
|
|
$password .= $characters[rand() % strlen($characters)];
|
|
}
|
|
return $password;
|
|
}
|
|
/**
|
|
* Checks a password to see wether it is OK to use.
|
|
* @param string $password
|
|
* @return true if the password is acceptable, false otherwise
|
|
*/
|
|
function api_check_password($password)
|
|
{
|
|
$lengthPass = strlen($password);
|
|
if ($lengthPass < 5)
|
|
{
|
|
return false;
|
|
}
|
|
$passLower = strtolower($password);
|
|
$cptLettres = $cptChiffres = 0;
|
|
for ($i = 0; $i < $lengthPass; $i ++)
|
|
{
|
|
$codeCharCur = ord($passLower[$i]);
|
|
if ($i && abs($codeCharCur - $codeCharPrev) <= 1)
|
|
{
|
|
$consecutif ++;
|
|
if ($consecutif == 3)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$consecutif = 1;
|
|
}
|
|
if ($codeCharCur >= 97 && $codeCharCur <= 122)
|
|
{
|
|
$cptLettres ++;
|
|
}
|
|
elseif ($codeCharCur >= 48 && $codeCharCur <= 57)
|
|
{
|
|
$cptChiffres ++;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
$codeCharPrev = $codeCharCur;
|
|
}
|
|
return ($cptLettres >= 3 && $cptChiffres >= 2) ? true : false;
|
|
}
|
|
/**
|
|
* truncates a string
|
|
*
|
|
* @author Brouckaert Olivier
|
|
* @param string text - text to truncate
|
|
* @param integer length - length of the truncated text
|
|
* @param string endStr - suffix
|
|
* @param boolean middle - if true, truncates on string middle
|
|
*/
|
|
function api_trunc_str($text, $length = 30, $endStr = '...', $middle = false)
|
|
{
|
|
if (strlen($text) <= $length)
|
|
{
|
|
return $text;
|
|
}
|
|
if ($middle)
|
|
{
|
|
$text = rtrim(substr($text, 0, round($length / 2))).$endStr.ltrim(substr($text, -round($length / 2)));
|
|
}
|
|
else
|
|
{
|
|
$text = rtrim(substr($text, 0, $length)).$endStr;
|
|
}
|
|
return $text;
|
|
}
|
|
// deprecated, use api_trunc_str() instead
|
|
function shorten($input, $length = 15)
|
|
{
|
|
$length = intval($length);
|
|
if (!$length)
|
|
{
|
|
$length = 15;
|
|
}
|
|
return api_trunc_str($input, $length);
|
|
}
|
|
/**
|
|
* handling simple and double apostrofe in order that strings be stored properly in database
|
|
*
|
|
* @author Denes Nagy
|
|
* @param string variable - the variable to be revised
|
|
*/
|
|
function domesticate($input)
|
|
{
|
|
$input = stripslashes($input);
|
|
$input = str_replace("'", "''", $input);
|
|
$input = str_replace('"', "''", $input);
|
|
return ($input);
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
FAILURE MANAGEMENT
|
|
==============================================================================
|
|
*/
|
|
|
|
/*
|
|
* The Failure Management module is here to compensate
|
|
* the absence of an 'exception' device in PHP 4.
|
|
*/
|
|
/**
|
|
* $api_failureList - array containing all the failure recorded
|
|
* in order of arrival.
|
|
*/
|
|
$api_failureList = array ();
|
|
/**
|
|
* Fills a global array called $api_failureList
|
|
* This array collects all the failure occuring during the script runs
|
|
* The main purpose is allowing to manage the display messages externaly
|
|
* from the functions or objects. This strengthens encupsalation principle
|
|
*
|
|
* @author Hugues Peeters <peeters@ipm.ucl.ac.be>
|
|
* @param string $failureType - the type of failure
|
|
* @global array $api_failureList
|
|
* @return bolean false to stay consistent with the main script
|
|
*/
|
|
function api_set_failure($failureType)
|
|
{
|
|
global $api_failureList;
|
|
$api_failureList[] = $failureType;
|
|
return false;
|
|
}
|
|
/**
|
|
* get the last failure stored in $api_failureList;
|
|
*
|
|
* @author Hugues Peeters <hugues.peeters@claroline.net>
|
|
* @param void
|
|
* @return string - the last failure stored
|
|
*/
|
|
function api_get_last_failure()
|
|
{
|
|
global $api_failureList;
|
|
return $api_failureList[count($api_failureList) - 1];
|
|
}
|
|
/**
|
|
* collects and manage failures occuring during script execution
|
|
* The main purpose is allowing to manage the display messages externaly
|
|
* from functions or objects. This strengthens encupsalation principle
|
|
*
|
|
* @author Hugues Peeters <hugues.peeters@claroline.net>
|
|
* @package dokeos.library
|
|
*/
|
|
class api_failure
|
|
{
|
|
/*
|
|
* IMPLEMENTATION NOTE : For now the $api_failureList list is set to the
|
|
* global scope, as PHP 4 is unable to manage static variable in class. But
|
|
* this feature is awaited in PHP 5. The class is already written to minize
|
|
* the change when static class variable will be possible. And the API won't
|
|
* change.
|
|
*/
|
|
var $api_failureList = array ();
|
|
/**
|
|
* Pile the last failure in the failure list
|
|
*
|
|
* @author Hugues Peeters <peeters@ipm.ucl.ac.be>
|
|
* @param string $failureType - the type of failure
|
|
* @global array $api_failureList
|
|
* @return bolean false to stay consistent with the main script
|
|
*/
|
|
function set_failure($failureType)
|
|
{
|
|
global $api_failureList;
|
|
$api_failureList[] = $failureType;
|
|
return false;
|
|
}
|
|
/**
|
|
* get the last failure stored
|
|
*
|
|
* @author Hugues Peeters <hugues.peeters@claroline.net>
|
|
* @param void
|
|
* @return string - the last failure stored
|
|
*/
|
|
function get_last_failure()
|
|
{
|
|
global $api_failureList;
|
|
return $api_failureList[count($api_failureList) - 1];
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
CONFIGURATION SETTINGS
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* DEPRECATED, use api_get_setting instead
|
|
*/
|
|
function get_setting($variable, $key = NULL)
|
|
{
|
|
global $_setting;
|
|
return is_null($key) ? $_setting[$variable] : $_setting[$variable][$key];
|
|
}
|
|
|
|
/**
|
|
* Returns the value of a setting from the web-adjustable admin config settings.
|
|
*
|
|
* WARNING true/false are stored as string, so when comparing you need to check e.g.
|
|
* if(api_get_setting("show_navigation_menu") == "true") //CORRECT
|
|
* instead of
|
|
* if(api_get_setting("show_navigation_menu") == true) //INCORRECT
|
|
*
|
|
* @author Rene Haentjens
|
|
* @author Bart Mollet
|
|
*/
|
|
function api_get_setting($variable, $key = NULL)
|
|
{
|
|
global $_setting;
|
|
return is_null($key) ? $_setting[$variable] : $_setting[$variable][$key];
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
LANGUAGE SUPPORT
|
|
==============================================================================
|
|
*/
|
|
|
|
/**
|
|
* Whenever the server type in the Dokeos Config settings is
|
|
* set to test/development server you will get an indication that a language variable
|
|
* is not translated and a link to a suggestions form of DLTT.
|
|
*
|
|
* @return language variable '$lang'.$variable or language variable $variable.
|
|
*
|
|
* @author Roan Embrechts
|
|
* @author Patrick Cool
|
|
*/
|
|
function get_lang($variable, $notrans = 'DLTT')
|
|
{
|
|
if (api_get_setting('server_type') != 'test')
|
|
{
|
|
$lvv = isset ($GLOBALS['lang'.$variable]) ? $GLOBALS['lang'.$variable] : (isset ($GLOBALS[$variable]) ? $GLOBALS[$variable] : '[='.$variable.'=]');
|
|
if (!is_string($lvv))
|
|
return $lvv;
|
|
return str_replace("\\'", "'", $lvv);
|
|
}
|
|
if (!is_string($variable))
|
|
return '[=get_lang(?)=]';
|
|
global $language_interface, $language_file;
|
|
//language file specified in tool
|
|
if (isset ($language_file))
|
|
{
|
|
if (!is_array($language_file))
|
|
{
|
|
include (api_get_path(SYS_CODE_PATH)."lang/".$language_interface."/".$language_file.".inc.php");
|
|
}
|
|
else
|
|
{
|
|
foreach ($language_file as $index => $language_file)
|
|
{
|
|
include (api_get_path(SYS_CODE_PATH)."lang/".$language_interface."/".$language_file.".inc.php");
|
|
}
|
|
}
|
|
}
|
|
//general language variables
|
|
include (api_get_path(SYS_CODE_PATH)."lang/".$language_interface."/trad4all.inc.php");
|
|
//notification (what's new) language variables
|
|
include (api_get_path(SYS_CODE_PATH)."lang/".$language_interface."/notification.inc.php");
|
|
@ eval ('$langvar = $'.$variable.';'); // Note (RH): $$var doesn't work with arrays, see PHP doc
|
|
if (isset ($langvar) && is_string($langvar) && strlen($langvar) > 0)
|
|
{
|
|
return str_replace("\\'", "'", $langvar);
|
|
}
|
|
@ eval ('$langvar = $lang'.$variable.';');
|
|
if (isset ($langvar) && is_string($langvar) && strlen($langvar) > 0)
|
|
{
|
|
return str_replace("\\'", "'", $langvar);
|
|
}
|
|
if ($notrans != 'DLTT')
|
|
return '[='.$variable.'=]';
|
|
return '[='.$variable."=]<a href=\"http://www.dokeos.com/DLTT/suggestion.php?file=".$language_file.".inc.php&variable=$".$variable."&language=".$language_interface."\" style=\"color:#FF0000\"><strong>#</strong></a>";
|
|
}
|
|
|
|
/**
|
|
* Gets the current interface language
|
|
* @return string The current language of the interface
|
|
*/
|
|
function api_get_interface_language()
|
|
{
|
|
global $language_interface;
|
|
return $language_interface;
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
USER PERMISSIONS
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Check if current user is a platform administrator
|
|
* @return boolean True if the user has platform admin rights,
|
|
* false otherwise.
|
|
*/
|
|
function api_is_platform_admin()
|
|
{
|
|
return $_SESSION["is_platformAdmin"];
|
|
}
|
|
/**
|
|
* Check if current user is allowed to create courses
|
|
* @return boolean True if the user has course creation rights,
|
|
* false otherwise.
|
|
*/
|
|
function api_is_allowed_to_create_course()
|
|
{
|
|
return $_SESSION["is_allowedCreateCourse"];
|
|
}
|
|
/**
|
|
* Check if the current user is a course administrator
|
|
* @return boolean True if current user is a course administrator
|
|
*/
|
|
function api_is_course_admin()
|
|
{
|
|
return $_SESSION["is_courseAdmin"];
|
|
}
|
|
/**
|
|
* Check if the current user is a course or session coach
|
|
* @return boolean True if current user is a course or session coach
|
|
*/
|
|
function api_is_coach()
|
|
{
|
|
global $_user;
|
|
global $sessionIsCoach;
|
|
|
|
$sql = "SELECT DISTINCT id, name, date_start, date_end
|
|
FROM session
|
|
INNER JOIN session_rel_course
|
|
ON session_rel_course.id_coach = '".mysql_real_escape_string($_user['user_id'])."'
|
|
ORDER BY date_start, date_end, name";
|
|
$result = api_sql_query($sql,__FILE__,__LINE__);
|
|
$sessionIsCoach = api_store_result($result);
|
|
|
|
$sql = "SELECT DISTINCT id, name, date_start, date_end
|
|
FROM session
|
|
WHERE session.id_coach = '".mysql_real_escape_string($_user['user_id'])."'
|
|
ORDER BY date_start, date_end, name";
|
|
$result = api_sql_query($sql,__FILE__,__LINE__);
|
|
$sessionIsCoach = array_merge($sessionIsCoach , api_store_result($result));
|
|
|
|
if(count($sessionIsCoach) > 0)
|
|
{
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
/*
|
|
==============================================================================
|
|
DISPLAY OPTIONS
|
|
student view, title, message boxes,...
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Displays the title of a tool.
|
|
* Normal use: parameter is a string:
|
|
* api_display_tool_title("My Tool")
|
|
*
|
|
* Optionally, there can be a subtitle below
|
|
* the normal title, and / or a supra title above the normal title.
|
|
*
|
|
* e.g. supra title:
|
|
* group
|
|
* GROUP PROPERTIES
|
|
*
|
|
* e.g. subtitle:
|
|
* AGENDA
|
|
* calender & events tool
|
|
*
|
|
* @author Hugues Peeters <hugues.peeters@claroline.net>
|
|
* @param mixed $titleElement - it could either be a string or an array
|
|
* containing 'supraTitle', 'mainTitle',
|
|
* 'subTitle'
|
|
* @return void
|
|
*/
|
|
function api_display_tool_title($titleElement)
|
|
{
|
|
if (is_string($titleElement))
|
|
{
|
|
$tit = $titleElement;
|
|
unset ($titleElement);
|
|
$titleElement['mainTitle'] = $tit;
|
|
}
|
|
echo '<h3>';
|
|
if ($titleElement['supraTitle'])
|
|
{
|
|
echo '<small>'.$titleElement['supraTitle'].'</small><br>';
|
|
}
|
|
if ($titleElement['mainTitle'])
|
|
{
|
|
echo $titleElement['mainTitle'];
|
|
}
|
|
if ($titleElement['subTitle'])
|
|
{
|
|
echo '<br><small>'.$titleElement['subTitle'].'</small>';
|
|
}
|
|
echo '</h3>';
|
|
}
|
|
/**
|
|
* Display options to switch between student view and course manager view
|
|
*
|
|
* Changes in version 1.2 (Patrick Cool)
|
|
* Student view switch now behaves as a real switch. It maintains its current state until the state
|
|
* is changed explicitly
|
|
*
|
|
* Changes in version 1.1 (Patrick Cool)
|
|
* student view now works correctly in subfolders of the document tool
|
|
* student view works correctly in the new links tool
|
|
*
|
|
* Example code for using this in your tools:
|
|
* //if ( $is_courseAdmin && is_student_view_enabled() )
|
|
* //{
|
|
* // display_tool_view_option($isStudentView);
|
|
* //}
|
|
* //and in later sections, use api_is_allowed_to_edit()
|
|
*
|
|
@author Roan Embrechts
|
|
* @author Patrick Cool
|
|
* @version 1.2
|
|
* @todo rewrite code so it is easier to understand
|
|
*/
|
|
function api_display_tool_view_option()
|
|
{
|
|
$isStudentView = $_GET["isStudentView"];
|
|
// check if the $_SERVER['REQUEST_URI'] contains already url parameters (thus a questionmark)
|
|
if (!strstr($_SERVER['REQUEST_URI'], "?"))
|
|
{
|
|
$sourceurl = $_SERVER['PHP_SELF']."?";
|
|
}
|
|
else
|
|
{
|
|
$sourceurl = $_SERVER['REQUEST_URI'];
|
|
}
|
|
if ($isStudentView == "true" and $_SESSION["studentview"])
|
|
{
|
|
// switching to studentview
|
|
// We are in studentview here
|
|
$_SESSION["studentview"] = "studentenview";
|
|
// we have to remove the isStudentView=true from the $sourceurl
|
|
$sourceurl = str_replace("&isStudentView=true", "", $sourceurl);
|
|
$sourceurl = str_replace("&isStudentView=false", "", $sourceurl);
|
|
$output_string .= "<a href='".$sourceurl."&isStudentView=false'>".get_lang("CourseManagerview")."</a>";
|
|
}
|
|
elseif ($isStudentView == "false" and $_SESSION["studentview"])
|
|
{
|
|
//switching to teacherview
|
|
$sourceurl = str_replace("&isStudentView=true", "", $sourceurl);
|
|
$sourceurl = str_replace("&isStudentView=false", "", $sourceurl);
|
|
// We are in teacherview here
|
|
$_SESSION["studentview"] = "teacherview";
|
|
$output_string .= "<a href='".$sourceurl."&isStudentView=true'>".get_lang("StudentView")."</a>";
|
|
}
|
|
elseif ($_SESSION["studentview"])
|
|
{
|
|
// no switching
|
|
if ($_SESSION["studentview"] == "teacherview")
|
|
{
|
|
$output_string .= "<a href='".$sourceurl."&isStudentView=true'>".get_lang("StudentView")."</a>";
|
|
}
|
|
if ($_SESSION["studentview"] == "studentenview")
|
|
{
|
|
$sourceurl = str_replace("&isStudentView=true", "", $sourceurl);
|
|
$output_string .= " <a href='".$sourceurl."&isStudentView=false'>".get_lang("CourseManagerview")."</a>";
|
|
}
|
|
}
|
|
elseif (!$_SESSION["studentview"])
|
|
{
|
|
// initialisation
|
|
// We are in teacherview here
|
|
$_SESSION["studentview"] = "teacherview";
|
|
$output_string .= "<a href='".$sourceurl."&isStudentView=true'>".get_lang("StudentView")."</a>";
|
|
|
|
}
|
|
if (api_get_setting('show_student_view') == "true")
|
|
{
|
|
echo $output_string;
|
|
}
|
|
}
|
|
/**
|
|
* Displays the contents of an array in a messagebox.
|
|
* @param array $info_array An array with the messages to show
|
|
*/
|
|
function api_display_array($info_array)
|
|
{
|
|
foreach ($info_array as $element)
|
|
{
|
|
$message .= $element."<br>";
|
|
}
|
|
Display :: display_normal_message($message);
|
|
}
|
|
/**
|
|
* Displays debug info
|
|
* @param string $debug_info The message to display
|
|
* @author Roan Embrechts
|
|
* @version 1.1, March 2004
|
|
*/
|
|
function api_display_debug_info($debug_info)
|
|
{
|
|
$message = "<i>Debug info</i><br>";
|
|
$message .= $debug_info;
|
|
Display :: display_normal_message($message);
|
|
}
|
|
/**
|
|
* @deprecated, use api_is_allowed_to_edit() instead
|
|
*/
|
|
function is_allowed_to_edit()
|
|
{
|
|
return api_is_allowed_to_edit();
|
|
}
|
|
|
|
/**
|
|
* Function that removes the need to directly use is_courseAdmin global in
|
|
* tool scripts. It returns true or false depending on the user's rights in
|
|
* this particular course.
|
|
*
|
|
* @author Roan Embrechts
|
|
* @author Patrick Cool
|
|
* @version 1.1, February 2004
|
|
* @return boolean, true: the user has the rights to edit, false: he does not
|
|
*/
|
|
function api_is_allowed_to_edit()
|
|
{
|
|
$is_courseAdmin = api_is_course_admin();
|
|
|
|
if(is_student_view_enabled())
|
|
{
|
|
$is_allowed = $is_courseAdmin && $_SESSION['studentview'] != "studentenview";
|
|
|
|
return $is_allowed;
|
|
}
|
|
else
|
|
return $is_courseAdmin;
|
|
}
|
|
|
|
/**
|
|
* this fun
|
|
* @param $tool the tool we are checking ifthe user has a certain permission
|
|
* @param $action the action we are checking (add, edit, delete, move, visibility)
|
|
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
|
|
* @version 1.0
|
|
*/
|
|
function api_is_allowed($tool, $action, $task_id = 0)
|
|
{
|
|
global $_course;
|
|
global $_user;
|
|
|
|
if(api_is_course_admin())
|
|
return true;
|
|
|
|
//if(!$_SESSION['total_permissions'][$_course['code']] and $_course)
|
|
if($_course)
|
|
{
|
|
include_once(api_get_path(SYS_CODE_PATH) . 'permissions/permissions_functions.inc.php');
|
|
include_once(api_get_path(LIBRARY_PATH) . "/groupmanager.lib.php");
|
|
|
|
// getting the permissions of this user
|
|
if($task_id == 0)
|
|
{
|
|
$user_permissions = get_permissions('user', $_user['user_id']);
|
|
$_SESSION['total_permissions'][$_course['code']] = $user_permissions;
|
|
}
|
|
|
|
// getting the permissions of the task
|
|
if($task_id != 0)
|
|
{
|
|
$task_permissions = get_permissions('task', $task_id);
|
|
/* !!! */$_SESSION['total_permissions'][$_course['code']] = $task_permissions;
|
|
}
|
|
//print_r($_SESSION['total_permissions']);
|
|
|
|
// getting the permissions of the groups of the user
|
|
$groups_of_user = GroupManager::get_group_ids($_course['db_name'], $_user['user_id']);
|
|
|
|
foreach($groups_of_user as $group)
|
|
$this_group_permissions = get_permissions('group', $group);
|
|
|
|
// getting the permissions of the courseroles of the user
|
|
$user_courserole_permissions = get_roles_permissions('user', $_user['user_id']);
|
|
|
|
// getting the permissions of the platformroles of the user
|
|
//$user_platformrole_permissions = get_roles_permissions('user', $_user['user_id'], ', platform');
|
|
|
|
// getting the permissions of the roles of the groups of the user
|
|
foreach($groups_of_user as $group)
|
|
$this_group_courserole_permissions = get_roles_permissions('group', $group);
|
|
|
|
// getting the permissions of the platformroles of the groups of the user
|
|
foreach($groups_of_user as $group)
|
|
$this_group_platformrole_permissions = get_roles_permissions('group', $group, 'platform');
|
|
}
|
|
|
|
// ifthe permissions are limited we have to map the extended ones to the limited ones
|
|
if(api_get_setting('permissions') == 'limited')
|
|
{
|
|
if($action == 'Visibility')
|
|
$action = 'Edit';
|
|
|
|
if($action == 'Move')
|
|
$action = 'Edit';
|
|
}
|
|
|
|
// the session that contains all the permissions already exists for this course
|
|
// so there is no need to requery everything.
|
|
//my_print_r($_SESSION['total_permissions'][$_course['code']][$tool]);
|
|
if(in_array($action, $_SESSION['total_permissions'][$_course['code']][$tool]))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Displays message "You are not allowed here..." and exits the entire script.
|
|
*
|
|
* @author Roan Embrechts
|
|
* @author Yannick Warnier
|
|
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
|
|
*
|
|
* @version 1.0, February 2004
|
|
* @version dokeos 1.8, August 2006
|
|
*/
|
|
function api_not_allowed()
|
|
{
|
|
$home_url = api_get_path(WEB_PATH);
|
|
if(!empty($_SERVER['REQUEST_URI']) && !empty($_GET['cidReq'])){
|
|
//only display form and return to the previous URL if there was a course ID included
|
|
include_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
|
|
$form = new FormValidator('formLogin');
|
|
$form->addElement('static',null,null,'Username');
|
|
$form->addElement('text','login','',array('size'=>15));
|
|
$form->addElement('static',null,null,'Password');
|
|
$form->addElement('password','password','',array('size'=>15));
|
|
$form->addElement('submit','submitAuth',get_lang('Ok'));
|
|
$test = $form->return_form();
|
|
echo '<div align="center">';
|
|
Display :: display_error_message("<p>Either you are not allowed here or your session has expired.<br/><br/>Please try to login again using the following form: <br/>".$test);
|
|
echo '</div>';
|
|
$_SESSION['request_uri'] = $_SERVER['REQUEST_URI'];
|
|
Display::display_footer();
|
|
die();
|
|
}else{
|
|
//if no course ID was included in the requested URL, redirect to homepage
|
|
echo '<div align="center">';
|
|
Display :: display_error_message('<p>Either you are not allowed here or your session has expired.<br/><br/><a href="'.$home_url.'">Please try to login again from the homepage</a><br/>');
|
|
echo '</div>';
|
|
Display::display_footer();
|
|
die();
|
|
}
|
|
}
|
|
/**
|
|
* Returns true if student view option is enabled, false otherwise. If it is
|
|
* true, tools can provide a student / course manager switch option. (see
|
|
* display_tool_view_option() )
|
|
* @return boolean True if student view option is enabled.
|
|
*/
|
|
function is_student_view_enabled()
|
|
{
|
|
return api_get_setting('show_student_view') == 'true';
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
WHAT'S NEW
|
|
functions for the what's new icons
|
|
in the user course list
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* @param $last_post_datetime standard output date in a sql query
|
|
* @return unix timestamp
|
|
* @author Toon Van Hoecke <Toon.VanHoecke@UGent.be>
|
|
* @version October 2003
|
|
* @desc convert sql date to unix timestamp
|
|
*/
|
|
function convert_mysql_date($last_post_datetime)
|
|
{
|
|
list ($last_post_date, $last_post_time) = split(" ", $last_post_datetime);
|
|
list ($year, $month, $day) = explode("-", $last_post_date);
|
|
list ($hour, $min, $sec) = explode(":", $last_post_time);
|
|
$announceDate = mktime($hour, $min, $sec, $month, $day, $year);
|
|
return $announceDate;
|
|
}
|
|
|
|
/**
|
|
* Updates or adds item properties to the Item_propetry table
|
|
* Tool and lastedit_type are language independant strings (langvars->get_lang!)
|
|
*
|
|
* @param $_course : array with course properties
|
|
* @param $tool : tool id, linked to 'rubrique' of the course tool_list (Warning: language sensitive !!)
|
|
* @param $item_id : id of the item itself, linked to key of every tool ('id', ...), "*" = all items of the tool
|
|
* @param $lastedit_type : add or update action (1) message to be translated (in trad4all) : e.g. DocumentAdded, DocumentUpdated;
|
|
* (2) "delete"; (3) "visible"; (4) "invisible";
|
|
* @param $user_id : id of the editing/adding user
|
|
* @param $to_group_id : id of the intended group ( 0 = for everybody), only relevant for $type (1)
|
|
* @param $to_user_id : id of the intended user (always has priority over $to_group_id !), only relevant for $type (1)
|
|
* @param string $start_visible 0000-00-00 00:00:00 format
|
|
* @param unknown_type $end_visible 0000-00-00 00:00:00 format
|
|
* @return boolean False if update fails.
|
|
* @author Toon Van Hoecke <Toon.VanHoecke@UGent.be>, Ghent University
|
|
* @version January 2005
|
|
* @desc update the item_properties table (if entry not exists, insert) of the course
|
|
*/
|
|
function api_item_property_update($_course, $tool, $item_id, $lastedit_type, $user_id, $to_group_id = 0, $to_user_id = NULL, $start_visible = 0, $end_visible = 0)
|
|
{
|
|
$time = time();
|
|
$time = date("Y-m-d H:i:s", $time);
|
|
$TABLE_ITEMPROPERTY = Database :: get_course_table(TABLE_ITEM_PROPERTY,$_course['dbName']);
|
|
if ($to_user_id <= 0)
|
|
$to_user_id = NULL; //no to_user_id set
|
|
$start_visible = ($start_visible == 0) ? "0000-00-00 00:00:00" : $start_visible;
|
|
$end_visible = ($end_visible == 0) ? "0000-00-00 00:00:00" : $end_visible;
|
|
// set filters for $to_user_id and $to_group_id, with priority for $to_user_id
|
|
$filter = "tool='$tool' AND ref='$item_id'";
|
|
if ($item_id == "*")
|
|
$filter = "tool='$tool' AND visibility<>'2'"; // for all (not deleted) items of the tool
|
|
// check if $to_user_id and $to_group_id are passed in the function call
|
|
// if both are not passed (both are null) then it is a message for everybody and $to_group_id should be 0 !
|
|
if (is_null($to_user_id) && is_null($to_group_id))
|
|
$to_group_id = 0;
|
|
if (!is_null($to_user_id))
|
|
$to_filter = " AND to_user_id='$to_user_id'"; // set filter to intended user
|
|
else
|
|
if (!is_null($to_group_id))
|
|
$to_filter = " AND to_group_id='$to_group_id'"; // set filter to intended group
|
|
// update if possible
|
|
$set_type = "";
|
|
switch ($lastedit_type)
|
|
{
|
|
case "delete" : // delete = make item only visible for the platform admin
|
|
$visibility = '2';
|
|
$sql = "UPDATE $TABLE_ITEMPROPERTY
|
|
SET lastedit_date='$time', lastedit_user_id='$user_id', visibility='$visibility' $set_type
|
|
WHERE $filter";
|
|
break;
|
|
case "visible" : // change item to visible
|
|
$visibility = '1';
|
|
$sql = "UPDATE $TABLE_ITEMPROPERTY
|
|
SET lastedit_date='$time', lastedit_user_id='$user_id', visibility='$visibility' $set_type
|
|
WHERE $filter";
|
|
break;
|
|
case "invisible" : // change item to invisible
|
|
$visibility = '0';
|
|
$sql = "UPDATE $TABLE_ITEMPROPERTY
|
|
SET lastedit_date='$time', lastedit_user_id='$user_id', visibility='$visibility' $set_type
|
|
WHERE $filter";
|
|
break;
|
|
default : // item will be added or updated
|
|
$set_type = ", lastedit_type='$lastedit_type' ";
|
|
$visibility = '1';
|
|
$filter .= $to_filter;
|
|
$sql = "UPDATE $TABLE_ITEMPROPERTY
|
|
SET lastedit_date='$time', lastedit_user_id='$user_id' $set_type
|
|
WHERE $filter";
|
|
}
|
|
|
|
$res = mysql_query($sql);
|
|
// insert if no entries are found (can only happen in case of $lastedit_type switch is 'default')
|
|
if (mysql_affected_rows() == 0)
|
|
{
|
|
if (!is_null($to_user_id)) // $to_user_id has more priority than $to_group_id
|
|
{
|
|
$to_field = "to_user_id";
|
|
$to_value = $to_user_id;
|
|
}
|
|
else // $to_user_id is not set
|
|
{
|
|
$to_field = "to_group_id";
|
|
$to_value = $to_group_id;
|
|
}
|
|
$sql = "INSERT INTO $TABLE_ITEMPROPERTY
|
|
(tool, ref, insert_date,insert_user_id,lastedit_date,lastedit_type, lastedit_user_id,$to_field, visibility, start_visible, end_visible)
|
|
VALUES ('$tool','$item_id','$time', '$user_id', '$time', '$lastedit_type','$user_id', '$to_value','$visibility','$start_visible','$end_visible')";
|
|
$res = mysql_query($sql);
|
|
if (!$res)
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
Language Dropdown
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Displays a form (drop down menu) so the user can select his/her preferred language.
|
|
* The form works with or without javascript
|
|
*/
|
|
function api_display_language_form()
|
|
{
|
|
$platformLanguage = api_get_setting('platformLanguage');
|
|
$dirname = api_get_path(SYS_PATH)."main/lang/"; // this line is probably no longer needed
|
|
// retrieve a complete list of all the languages.
|
|
$language_list = api_get_languages();
|
|
// the the current language of the user so that his/her language occurs as selected in the dropdown menu
|
|
$user_selected_language = $_SESSION["user_language_choice"];
|
|
if (!isset ($user_selected_language))
|
|
$user_selected_language = $platformLanguage;
|
|
$original_languages = $language_list['name'];
|
|
$folder = $language_list['folder']; // this line is probably no longer needed
|
|
?>
|
|
<script language="JavaScript" type="text/JavaScript">
|
|
<!--
|
|
function jumpMenu(targ,selObj,restore){ //v3.0
|
|
eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
|
|
if (restore) selObj.selectedIndex=0;
|
|
}
|
|
//-->
|
|
</script>
|
|
<?php
|
|
|
|
|
|
echo "<form id=\"lang_form\" name=\"lang_form\" method=\"post\" action=\"".$_SERVER['PHP_SELF']."\">", "<select name=\"language_list\" onchange=\"jumpMenu('parent',this,0)\">";
|
|
foreach ($original_languages as $key => $value)
|
|
{
|
|
if ($folder[$key] == $user_selected_language)
|
|
$option_end = " selected=\"selected\" >";
|
|
else
|
|
$option_end = ">";
|
|
echo "<option value=\"".$_SERVER['PHP_SELF']."?language=".$folder[$key]."\"$option_end";
|
|
#echo substr($value,0,16); #cut string to keep 800x600 aspect
|
|
echo $value;
|
|
echo "</option>\n";
|
|
}
|
|
echo "</select>";
|
|
echo "<noscript><input type=\"submit\" name=\"user_select_language\" value=\"".get_lang("Ok")."\" /></noscript>";
|
|
echo "</form>";
|
|
}
|
|
/**
|
|
* Return a list of all the languages that are made available by the admin.
|
|
* @return array An array with all languages. Structure of the array is
|
|
* array['name'] = An array with the name of every language
|
|
* array['folder'] = An array with the corresponding dokeos-folder
|
|
*/
|
|
function api_get_languages()
|
|
{
|
|
$tbl_language = Database :: get_main_table(TABLE_MAIN_LANGUAGE);
|
|
;
|
|
$sql = "SELECT * FROM $tbl_language WHERE available='1' ORDER BY original_name ASC";
|
|
$result = api_sql_query($sql, __FILE__, __LINE__);
|
|
while ($row = mysql_fetch_array($result))
|
|
{
|
|
$language_list['name'][] = $row['original_name'];
|
|
$language_list['folder'][] = $row['dokeos_folder'];
|
|
}
|
|
return $language_list;
|
|
}
|
|
|
|
/*
|
|
==============================================================================
|
|
WYSIWYG HTML AREA
|
|
functions for the WYSIWYG html editor, TeX parsing...
|
|
==============================================================================
|
|
*/
|
|
/**
|
|
* Displays the FckEditor WYSIWYG editor for online editing of html
|
|
* @param string $name The name of the form-element
|
|
* @param string $content The default content of the html-editor
|
|
* @param int $height The height of the form element
|
|
* @param int $width The width of the form element
|
|
* @param string $optAttrib optional attributes for the form element
|
|
*/
|
|
function api_disp_html_area($name, $content = '', $height = '', $width = '100%', $optAttrib = '')
|
|
{
|
|
global $_configuration, $_course, $fck_attribute;
|
|
require_once(dirname(__FILE__).'/formvalidator/Element/html_editor.php');
|
|
$editor = new HTML_QuickForm_html_editor($name);
|
|
$editor->setValue($content);
|
|
if( $height != '')
|
|
{
|
|
$fck_attribute['Height'] = $height;
|
|
}
|
|
if( $width != '')
|
|
{
|
|
$fck_attribute['Width'] = $width;
|
|
}
|
|
echo $editor->toHtml();
|
|
}
|
|
|
|
/**
|
|
* Send an email.
|
|
*
|
|
* Wrapper function for the standard php mail() function. Change this function
|
|
* to your needs. The parameters must follow the same rules as the standard php
|
|
* mail() function. Please look at the documentation on http: //www. php.
|
|
* net/manual/en/function. mail.php
|
|
* @param string $to
|
|
* @param string $subject
|
|
* @param string $message
|
|
* @param string $additional_headers
|
|
* @param string $additional_parameters
|
|
*/
|
|
function api_send_mail($to, $subject, $message, $additional_headers = null, $additional_parameters = null)
|
|
{
|
|
return mail($to, $subject, $message, $additional_headers, $additional_parameters);
|
|
}
|
|
|
|
/**
|
|
* Find the largest sort value in a given user_course_category
|
|
* This function is used when we are moving a course to a different category
|
|
* and also when a user subscribes to a courses (the new courses is added to the end
|
|
* of the main category
|
|
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
|
|
* @param int $user_course_category: the id of the user_course_category
|
|
* @return int the value of the highest sort of the user_course_category
|
|
*/
|
|
function api_max_sort_value($user_course_category, $user_id)
|
|
{
|
|
|
|
$tbl_course_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
|
|
|
|
$sql_max = "SELECT max(sort) as max_sort FROM $tbl_course_user WHERE user_id='".$user_id."' AND user_course_cat='".$user_course_category."'";
|
|
$result_max = mysql_query($sql_max) or die(mysql_error());
|
|
if (mysql_num_rows($result_max) == 1)
|
|
{
|
|
$row_max = mysql_fetch_array($result_max);
|
|
$max_sort = $row_max['max_sort'];
|
|
}
|
|
else
|
|
{
|
|
$max_sort = 0;
|
|
}
|
|
|
|
return $max_sort;
|
|
}
|
|
|
|
/**
|
|
* This function converts the string "true" or "false" to a boolean true or false.
|
|
* This function is in the first place written for the Dokeos Config Settings (also named AWACS)
|
|
* @param string "true" or "false"
|
|
* @return boolean true or false
|
|
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
|
|
*/
|
|
function string_2_boolean($string)
|
|
{
|
|
if ($string == "true")
|
|
{
|
|
return true;
|
|
}
|
|
if ($string == "false")
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines the number of plugins installed for a given location
|
|
*/
|
|
function api_number_of_plugins($location)
|
|
{
|
|
global $_plugins;
|
|
if (is_array($_plugins[$location]))
|
|
{
|
|
return count($_plugins[$location]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* including the necessary plugins
|
|
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
|
|
*/
|
|
function api_plugin($location)
|
|
{
|
|
global $_plugins;
|
|
|
|
if (is_array($_plugins[$location]))
|
|
{
|
|
foreach ($_plugins[$location] as $this_plugin)
|
|
{
|
|
include (api_get_path(SYS_PLUGIN_PATH)."$this_plugin/index.php");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks to see wether a certain plugin is installed.
|
|
* @return boolean true if the plugin is installed, false otherwise.
|
|
*/
|
|
function api_is_plugin_installed($plugin_list, $plugin_name)
|
|
{
|
|
foreach ($plugin_list as $plugin_location)
|
|
{
|
|
if ( array_search($plugin_name, $plugin_location) !== false ) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Apply parsing to content to parse tex commandos that are seperated by [tex]
|
|
* [/tex] to make it readable for techexplorer plugin.
|
|
* @param string $text The text to parse
|
|
* @return string The text after parsing.
|
|
* @author Patrick Cool <patrick.cool@UGent.be>
|
|
* @version June 2004
|
|
*/
|
|
function api_parse_tex($textext)
|
|
{
|
|
if (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE'))
|
|
{
|
|
$textext = str_replace(array ("[tex]", "[/tex]"), array ("<object classid=\"clsid:5AFAB315-AD87-11D3-98BB-002035EFB1A4\"><param name=\"autosize\" value=\"true\" /><param name=\"DataType\" value=\"0\" /><param name=\"Data\" value=\"", "\" /></object>"), $textext);
|
|
}
|
|
else
|
|
{
|
|
$textext = str_replace(array ("[tex]", "[/tex]"), array ("<embed type=\"application/x-techexplorer\" texdata=\"", "\" autosize=\"true\" pluginspage=\"http://www.integretechpub.com/techexplorer/\">"), $textext);
|
|
}
|
|
return $textext;
|
|
}
|
|
|
|
?>
|