/**
*
* @global bool $is_platformAdmin
* @global bool $is_allowedCreateCourse
* @global object $_user
* @global int $_cid
* @global array $_course
* @global int $_real_cid
* @global type $_courseUser
* @global type $is_courseAdmin
* @global type $is_courseTutor
* @global type $is_courseCoach
* @global type $is_courseMember
* @global type $is_sessionAdmin
* @global type $is_allowed_in_course
*
* @param type $course_id
* @param type $reset
*/
static function init_course($course_id, $reset)
{
global $_configuration;
global $is_platformAdmin;
global $is_allowedCreateCourse;
global $_user;
global $_cid;
global $_course;
global $_real_cid;
global $is_courseAdmin;
//course teacher
global $is_courseTutor;
//course teacher - some rights
global $is_courseCoach;
//course coach
global $is_courseMember;
//course student
global $is_sessionAdmin;
global $is_allowed_in_course;
if ($reset) {
// Course session data refresh requested or empty data
if ($course_id) {
$course_table = Database::get_main_table(TABLE_MAIN_COURSE);
$course_cat_table = Database::get_main_table(TABLE_MAIN_CATEGORY);
$sql = "SELECT course.*, course_category.code faCode, course_category.name faName\n FROM {$course_table}\n LEFT JOIN {$course_cat_table}\n ON course.category_code = course_category.code\n WHERE course.code = '{$course_id}'";
$result = Database::query($sql);
if (Database::num_rows($result) > 0) {
$course_data = Database::fetch_array($result);
//@TODO real_cid should be cid, for working with numeric course id
$_real_cid = $course_data['id'];
$_cid = $course_data['code'];
$_course = array();
$_course['real_id'] = $course_data['id'];
$_course['id'] = $course_data['code'];
//auto-assigned integer
$_course['code'] = $course_data['code'];
$_course['name'] = $course_data['title'];
$_course['title'] = $course_data['title'];
$_course['official_code'] = $course_data['visual_code'];
// use in echo
$_course['sysCode'] = $course_data['code'];
// use as key in db
$_course['path'] = $course_data['directory'];
// use as key in path
$_course['titular'] = $course_data['tutor_name'];
// this should be deprecated and use the table course_rel_user
$_course['language'] = $course_data['course_language'];
$_course['extLink']['url'] = $course_data['department_url'];
$_course['extLink']['name'] = $course_data['department_name'];
$_course['categoryCode'] = $course_data['faCode'];
$_course['categoryName'] = $course_data['faName'];
$_course['visibility'] = $course_data['visibility'];
$_course['subscribe_allowed'] = $course_data['subscribe'];
$_course['unsubscribe'] = $course_data['unsubscribe'];
$_course['activate_legal'] = $course_data['activate_legal'];
$_course['show_score'] = $course_data['show_score'];
//used in the work tool
Session::write('_cid', $_cid);
Session::write('_course', $_course);
//@TODO real_cid should be cid, for working with numeric course id
Session::write('_real_cid', $_real_cid);
// if a session id has been given in url, we store the session
// Database Table Definitions
$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
if (!empty($_GET['id_session'])) {
$_SESSION['id_session'] = intval($_GET['id_session']);
$sql = 'SELECT name FROM ' . $tbl_session . ' WHERE id="' . intval($_SESSION['id_session']) . '"';
$rs = Database::query($sql);
list($_SESSION['session_name']) = Database::fetch_array($rs);
} else {
Session::erase('session_name');
Session::erase('id_session');
}
if (!isset($_SESSION['login_as'])) {
//Course login
if (isset($_user['user_id'])) {
Event::event_course_login(api_get_course_int_id(), $_user['user_id'], api_get_session_id());
}
}
} else {
//exit("WARNING UNDEFINED CID !! ");
header('location:' . api_get_path(WEB_PATH));
}
} else {
Session::erase('_cid');
Session::erase('_real_cid');
Session::erase('_course');
if (!empty($_SESSION)) {
foreach ($_SESSION as $key => $session_item) {
if (strpos($key, 'lp_autolaunch_') === false) {
continue;
} else {
if (isset($_SESSION[$key])) {
Session::erase($key);
}
}
}
}
//Deleting session info
if (api_get_session_id()) {
Session::erase('id_session');
Session::erase('session_name');
}
}
} else {
// Continue with the previous values
if (empty($_SESSION['_course']) or empty($_SESSION['_cid'])) {
//no previous values...
$_cid = -1;
//set default values that will be caracteristic of being unset
$_course = -1;
} else {
$_cid = $_SESSION['_cid'];
$_course = $_SESSION['_course'];
// these lines are usefull for tracking. Indeed we can have lost the id_session and not the cid.
// Moreover, if we want to track a course with another session it can be usefull
if (!empty($_GET['id_session'])) {
$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
$sql = 'SELECT name FROM ' . $tbl_session . ' WHERE id="' . intval($_SESSION['id_session']) . '"';
$rs = Database::query($sql);
list($_SESSION['session_name']) = Database::fetch_array($rs);
$_SESSION['id_session'] = intval($_GET['id_session']);
}
if (!isset($_SESSION['login_as'])) {
$save_course_access = true;
//The value $_dont_save_user_course_access should be added before the call of global.inc.php see the main/inc/chat.ajax.php file
//Disables the updates in the TRACK_E_COURSE_ACCESS table
if (isset($_dont_save_user_course_access) && $_dont_save_user_course_access == true) {
$save_course_access = false;
}
if ($save_course_access) {
$course_tracking_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
/*
* When $_configuration['session_lifetime'] is too big 100 hours (in order to let users take exercises with no problems)
* the function Tracking::get_time_spent_on_the_course() returns big values (200h) due the condition:
* login_course_date > now() - INTERVAL $session_lifetime SECOND
*
*/
/*
if (isset($_configuration['session_lifetime'])) {
$session_lifetime = $_configuration['session_lifetime'];
} else {
$session_lifetime = 3600; // 1 hour
} */
$session_lifetime = 3600;
// 1 hour
$time = api_get_utc_datetime();
if (isset($_user['user_id']) && !empty($_user['user_id'])) {
//We select the last record for the current course in the course tracking table
//But only if the login date is < than now + max_life_time
$sql = "SELECT course_access_id FROM {$course_tracking_table}\n WHERE\n user_id = " . intval($_user['user_id']) . " AND\n c_id = '" . api_get_course_int_id() . "' AND\n session_id = " . api_get_session_id() . " AND\n login_course_date > now() - INTERVAL {$session_lifetime} SECOND\n ORDER BY login_course_date DESC LIMIT 0,1";
$result = Database::query($sql);
if (Database::num_rows($result) > 0) {
$i_course_access_id = Database::result($result, 0, 0);
//We update the course tracking table
$sql = "UPDATE {$course_tracking_table}\n SET logout_course_date = '{$time}', counter = counter+1\n WHERE course_access_id = " . intval($i_course_access_id) . " AND session_id = " . api_get_session_id();
Database::query($sql);
} else {
$sql = "INSERT INTO {$course_tracking_table} (c_id, user_id, login_course_date, logout_course_date, counter, session_id)" . "VALUES('" . api_get_course_int_id() . "', '" . $_user['user_id'] . "', '{$time}', '{$time}', '1','" . api_get_session_id() . "')";
Database::query($sql);
}
}
}
}
}
}
/* COURSE / USER REL. INIT */
$session_id = api_get_session_id();
$user_id = isset($_user['user_id']) ? $_user['user_id'] : null;
//Course permissions
$is_courseAdmin = false;
//course teacher
$is_courseTutor = false;
//course teacher - some rights
$is_courseMember = false;
//course student
//Course - User permissions
$is_sessionAdmin = false;
if ($reset) {
if (isset($user_id) && $user_id && isset($_cid) && $_cid) {
//Check if user is subscribed in a course
$course_user_table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
$sql = "SELECT * FROM {$course_user_table}\n WHERE\n user_id = '" . $user_id . "' AND\n relation_type <> " . COURSE_RELATION_TYPE_RRHH . " AND\n course_code = '{$course_id}'";
$result = Database::query($sql);
$cuData = null;
if (Database::num_rows($result) > 0) {
// this user have a recorded state for this course
$cuData = Database::fetch_array($result, 'ASSOC');
$is_courseAdmin = (bool) $cuData['status'] == 1;
$is_courseTutor = (bool) $cuData['is_tutor'] == 1;
$is_courseMember = true;
// Checking if the user filled the course legal agreement
if ($_course['activate_legal'] == 1 && !api_is_platform_admin()) {
$user_is_subscribed = CourseManager::is_user_accepted_legal($user_id, $_course['id'], $session_id);
if (!$user_is_subscribed) {
$url = api_get_path(WEB_CODE_PATH) . 'course_info/legal.php?course_code=' . $_course['code'] . '&session_id=' . $session_id;
header('Location: ' . $url);
exit;
}
}
}
//We are in a session course? Check session permissions
if (!empty($session_id)) {
//I'm not the teacher of the course
if ($is_courseAdmin == false) {
// this user has no status related to this course
// The user is subscribed in a session? The user is a Session coach a Session admin ?
$tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
$tbl_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
$tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
//Session coach, session admin, course coach admin
$sql = "SELECT session.id_coach, session_admin_id, session_rcru.user_id\n FROM {$tbl_session} session, {$tbl_session_course_user} session_rcru\n WHERE\n session_rcru.session_id = session.id AND\n session_rcru.c_id = '{$_real_cid}' AND\n session_rcru.user_id = '{$user_id}' AND\n session_rcru.session_id = {$session_id} AND\n session_rcru.status = 2";
$result = Database::query($sql);
$row = Database::store_result($result);
//I'm a session admin?
if (isset($row) && isset($row[0]) && $row[0]['session_admin_id'] == $user_id) {
$is_courseMember = false;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_courseCoach = false;
$is_sessionAdmin = true;
} else {
//Im a coach or a student?
$sql = "SELECT user_id, status\n FROM " . $tbl_session_course_user . "\n WHERE\n c_id = '{$_cid}' AND\n user_id = '" . $user_id . "' AND\n session_id = '" . $session_id . "'\n LIMIT 1";
$result = Database::query($sql);
if (Database::num_rows($result)) {
$row = Database::fetch_array($result, 'ASSOC');
$session_course_status = $row['status'];
switch ($session_course_status) {
case '2':
// coach - teacher
$is_courseMember = true;
$is_courseTutor = true;
$is_courseCoach = true;
$is_sessionAdmin = false;
if (api_get_setting('extend_rights_for_coach') == 'true') {
$is_courseAdmin = true;
} else {
$is_courseAdmin = false;
}
break;
case '0':
//student
$is_courseMember = true;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_sessionAdmin = false;
break;
default:
//unregister user
$is_courseMember = false;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_sessionAdmin = false;
break;
}
} else {
//unregister user
$is_courseMember = false;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_sessionAdmin = false;
}
}
}
//If I'm the admin platform i'm a teacher of the course
if ($is_platformAdmin) {
$is_courseAdmin = true;
}
}
} else {
// keys missing => not anymore in the course - user relation
// course
$is_courseMember = false;
$is_courseAdmin = false;
$is_courseTutor = false;
$is_courseCoach = false;
$is_sessionAdmin = false;
}
//Checking the course access
$is_allowed_in_course = false;
if (isset($_course)) {
switch ($_course['visibility']) {
case COURSE_VISIBILITY_OPEN_WORLD:
//3
$is_allowed_in_course = true;
break;
case COURSE_VISIBILITY_OPEN_PLATFORM:
//2
if (isset($user_id) && !api_is_anonymous($user_id)) {
$is_allowed_in_course = true;
}
break;
case COURSE_VISIBILITY_REGISTERED:
//1
if ($is_platformAdmin || $is_courseMember) {
$is_allowed_in_course = true;
}
break;
case COURSE_VISIBILITY_CLOSED:
//0
if ($is_platformAdmin || $is_courseAdmin) {
$is_allowed_in_course = true;
}
break;
case COURSE_VISIBILITY_HIDDEN:
//4
if ($is_platformAdmin) {
$is_allowed_in_course = true;
}
break;
}
}
// check the session visibility
if ($is_allowed_in_course == true) {
//if I'm in a session
if ($session_id != 0) {
if (!$is_platformAdmin) {
// admin and session coach are *not* affected to the invisible session mode
// the coach is not affected because he can log in some days after the end date of a session
$session_visibility = api_get_session_visibility($session_id);
switch ($session_visibility) {
case SESSION_INVISIBLE:
$is_allowed_in_course = false;
break;
}
//checking date
}
}
}
// save the states
Session::write('is_courseAdmin', $is_courseAdmin);
Session::write('is_courseMember', $is_courseMember);
Session::write('is_courseTutor', $is_courseTutor);
Session::write('is_courseCoach', $is_courseCoach);
Session::write('is_allowed_in_course', $is_allowed_in_course);
Session::write('is_sessionAdmin', $is_sessionAdmin);
} else {
// continue with the previous values
$is_courseAdmin = $_SESSION['is_courseAdmin'];
$is_courseTutor = $_SESSION['is_courseTutor'];
$is_courseCoach = $_SESSION['is_courseCoach'];
$is_courseMember = $_SESSION['is_courseMember'];
$is_allowed_in_course = $_SESSION['is_allowed_in_course'];
}
}
} else {
api_not_allowed(true);
}
} else {
Session::erase('session_name');
Session::erase('id_session');
}
if (!empty($_GET['gidReq'])) {
$_SESSION['_gid'] = intval($_GET['gidReq']);
} else {
Session::erase('_gid');
}
if (!isset($_SESSION['login_as'])) {
//Course login
if (isset($_user['user_id'])) {
Event::event_course_login(api_get_course_int_id(), api_get_user_id(), api_get_session_id());
}
}
} else {
//exit("WARNING UNDEFINED CID !! ");
header('location:' . api_get_path(WEB_PATH));
}
} else {
Session::erase('_cid');
Session::erase('_real_cid');
Session::erase('_course');
if (!empty($_SESSION)) {
foreach ($_SESSION as $key => $session_item) {
if (strpos($key, 'lp_autolaunch_') === false) {
continue;
} else {
