Ejemplo n.º 1
0
 /**
  * Creates a session (helper method)
  *
  * @param string Name of the session
  * @param string Start date, use the 'YYYY-MM-DD' format
  * @param string End date, use the 'YYYY-MM-DD' format
  * @param int Access delays of the coach (days before)
  * @param int Access delays of the coach (days after)
  * @param int Nolimit (0 = no limit of time, 1 = limit of time)
  * @param int Visibility
  * @param string User id field name for the coach
  * @param string User id value for the coach
  * @param string Original session id field name (use "chamilo_session_id" to use internal id)
  * @param string Original session id value
  * @param array Array of extra fields
  * @return mixed Generated id in case of success, WSError otherwise
  */
 protected function createSessionHelper($name, $start_date, $end_date, $nb_days_access_before, $nb_days_access_after, $nolimit, $visibility, $user_id_field_name, $user_id_value, $session_id_field_name, $session_id_value, $extras)
 {
     // Verify that coach exists and get its id
     $user_id = $this->getUserId($user_id_field_name, $user_id_value);
     if ($user_id instanceof WSError) {
         return $user_id;
     }
     $coachStartDate = null;
     if (!empty($nb_days_access_before)) {
         $day = intval($nb_days_access_before);
         $coachStartDate = date('Y-m-d ', strtotime($start_date . ' + ' . $day . ' days'));
     }
     $coachEndDate = null;
     if (!empty($nb_days_access_after)) {
         $day = intval($nb_days_access_after);
         $coachEndDate = date('Y-m-d ', strtotime($end_date . ' + ' . $day . ' days'));
     }
     // Try to create the session
     $session_id = SessionManager::create_session($name, $start_date, $end_date, $start_date, $end_date, $coachStartDate, $coachEndDate, $user_id, 0, $visibility);
     if (!is_int($session_id)) {
         return new WSError(301, 'Could not create the session');
     } else {
         // Add the Original session id to the extra fields
         $extras_associative = array();
         if ($session_id_field_name != "chamilo_session_id") {
             $extras_associative[$session_id_field_name] = $session_id_value;
         }
         foreach ($extras as $extra) {
             $extras_associative[$extra['field_name']] = $extra['field_value'];
         }
         // Create the extra fields
         foreach ($extras_associative as $fname => $fvalue) {
             SessionManager::create_session_extra_field($fname, 1, $fname);
             SessionManager::update_session_extra_field_value($session_id, $fname, $fvalue);
         }
         return $session_id;
     }
 }
Ejemplo n.º 2
0
	/**
	 * Creates a session (helper method)
	 *
	 * @param string Name of the session
	 * @param string Start date, use the 'YYYY-MM-DD' format
	 * @param string End date, use the 'YYYY-MM-DD' format
	 * @param int Access delays of the coach (days before)
	 * @param int Access delays of the coach (days after)
	 * @param int Nolimit (0 = no limit of time, 1 = limit of time)
	 * @param int Visibility
	 * @param string User id field name for the coach
	 * @param string User id value for the coach
	 * @param string Original session id field name (use "chamilo_session_id" to use internal id)
	 * @param string Original session id value
	 * @param array Array of extra fields
	 * @return mixed Generated id in case of success, WSError otherwise
	 */
	protected function createSessionHelper($name, $start_date, $end_date, $nb_days_access_before, $nb_days_access_after, $nolimit, $visibility, $user_id_field_name, $user_id_value, $session_id_field_name, $session_id_value, $extras) {
		// Verify that coach exists and get its id
		$user_id = $this->getUserId($user_id_field_name, $user_id_value);
		if($user_id instanceof WSError) {
			return $user_id;
		}
		// Build the date
		$start_date_array = explode('-', $start_date);
		foreach($start_date_array as &$sd_element) {
			$sd_element = intval($sd_element);
		}
		$end_date_array = explode('-', $end_date);
		foreach($end_date_array as &$ed_element) {
			$ed_element = intval($ed_element);
		}
		// Try to create the session
		$session_id = SessionManager::create_session($name, $start_date_array[0], $start_date_array[1], $start_date_array[2], $end_date_array[0], $end_date_array[1], $end_date_array[2], (int)$nb_days_access_before, (int)$nb_days_access_after, (int)$nolimit, $user_id, 0, (int)$visibility);
		if(!is_int($session_id)) {
			return new WSError(301, 'Could not create the session');
		} else {
			// Add the Original session id to the extra fields
			$extras_associative = array();
			if($session_id_field_name != "chamilo_session_id") {
				$extras_associative[$session_id_field_name] = $session_id_value;
			}
			foreach($extras as $extra) {
				$extras_associative[$extra['field_name']] = $extra['field_value'];
			}
			// Create the extra fields
			foreach($extras_associative as $fname => $fvalue) {
				SessionManager::create_session_extra_field($fname, 1, $fname);
				SessionManager::update_session_extra_field_value($session_id, $fname, $fvalue);
			}
			return $session_id;
		}
	}
Ejemplo n.º 3
0
function WSCreateSession($params)
{
    global $_user;
    if (!WSHelperVerifyKey($params)) {
        return return_error(WS_ERROR_SECRET_KEY);
    }
    $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
    $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
    $sessions_params = $params['sessions'];
    $results = array();
    $orig_session_id_value = array();
    foreach ($sessions_params as $session_param) {
        $name = trim($session_param['name']);
        $year_start = intval($session_param['year_start']);
        $month_start = intval($session_param['month_start']);
        $day_start = intval($session_param['day_start']);
        $year_end = intval($session_param['year_end']);
        $month_end = intval($session_param['month_end']);
        $day_end = intval($session_param['day_end']);
        $nb_days_access_before = intval($session_param['nb_days_access_before']);
        $nb_days_access_after = intval($session_param['nb_days_access_after']);
        $id_coach = $session_param['user_id'];
        $nolimit = $session_param['nolimit'];
        $original_session_id_name = $session_param['original_session_id_name'];
        $original_session_id_value = $session_param['original_session_id_value'];
        $orig_session_id_value[] = $session_param['original_session_id_value'];
        $extra_list = $session_param['extra'];
        $sessionId = SessionManager::getSessionIdFromOriginalId($original_session_id_value, $original_session_id_name);
        if (empty($sessionId)) {
            $results[] = 0;
            continue;
        }
        if (empty($nolimit)) {
            $date_start = "{$year_start}-" . ($month_start < 10 ? "0{$month_start}" : $month_start) . "-" . ($day_start < 10 ? "0{$day_start}" : $day_start) . ' 00:00:00';
            $date_end = "{$year_end}-" . ($month_end < 10 ? "0{$month_end}" : $month_end) . "-" . ($day_end < 10 ? "0{$day_end}" : $day_end) . ' 23:59:59';
        } else {
            $date_start = "";
            $date_end = "";
        }
        if (empty($name)) {
            $results[] = 0;
            continue;
        } elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start, $day_start, $year_start))) {
            $results[] = 0;
            continue;
        } elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end, $day_end, $year_end))) {
            $results[] = 0;
            continue;
        } elseif (empty($nolimit) && $date_start >= $date_end) {
            $results[] = 0;
            continue;
        } else {
            $rs = Database::query("SELECT 1 FROM {$tbl_session} WHERE name='" . addslashes($name) . "'");
            if (Database::num_rows($rs)) {
                $results[] = 0;
                continue;
            } else {
                $startDate = new DateTime($date_start);
                $endDate = new DateTime($date_end);
                $diffStart = new DateInterval($nb_days_access_before);
                $diffEnd = new DateInterval($nb_days_access_after);
                $coachStartDate = $startDate->sub($diffStart);
                $coachEndDate = $endDate->add($diffEnd);
                $id_session = SessionManager::create_session($name, $date_start, $date_end, $date_start, $date_end, $coachStartDate->format('Y-m-d H:i:s'), $coachEndDate->format('Y-m-d H:i:s'), $id_coach, 0, 0, false, null, null, 0, array(), $_user['user_id']);
                // Save new fieldlabel into course_field table.
                $field_id = SessionManager::create_session_extra_field($original_session_id_name, 1, $original_session_id_name);
                // Save the external system's id into user_field_value table.
                $res = SessionManager::update_session_extra_field_value($id_session, $original_session_id_name, $original_session_id_value);
                if (is_array($extra_list) && count($extra_list) > 0) {
                    foreach ($extra_list as $extra) {
                        $extra_field_name = $extra['field_name'];
                        $extra_field_value = $extra['field_value'];
                        // Save new fieldlabel into course_field table.
                        $field_id = SessionManager::create_session_extra_field($extra_field_name, 1, $extra_field_name);
                        // Save the external system's id into course_field_value table.
                        $res = SessionManager::update_session_extra_field_value($id_session, $extra_field_name, $extra_field_value);
                    }
                }
                $results[] = $id_session;
                continue;
            }
        }
    }
    // end principal foreach
    $count_results = count($results);
    $output = array();
    for ($i = 0; $i < $count_results; $i++) {
        $output[] = array('original_session_id_value' => $orig_session_id_value[$i], 'result' => $results[$i]);
    }
    return $output;
}
Ejemplo n.º 4
0
 /**
  * Updates the session synchronize with the csv file.
  * @param string $file
  */
 private function importSessionsStatic($file)
 {
     $content = file($file);
     $sessions = array();
     if (!api_strstr($content[0], ';')) {
         $error_message = get_lang('NotCSV');
     } else {
         $tag_names = array();
         foreach ($content as $key => $enreg) {
             $enreg = explode(';', trim($enreg));
             if ($key) {
                 foreach ($tag_names as $tag_key => $tag_name) {
                     $sessions[$key - 1][$tag_name] = $enreg[$tag_key];
                 }
             } else {
                 foreach ($enreg as $tag_name) {
                     $tag_names[] = api_preg_replace('/[^a-zA-Z0-9_\\-]/', '', $tag_name);
                 }
                 if (!in_array('SessionName', $tag_names) || !in_array('DateStart', $tag_names) || !in_array('DateEnd', $tag_names)) {
                     $error_message = get_lang('NoNeededData');
                     break;
                 }
             }
         }
     }
     if (!empty($sessions)) {
         // Looping the sessions.
         foreach ($sessions as $session) {
             if (!empty($session['SessionID'])) {
                 $sessionId = SessionManager::get_session_id_from_original_id($session['SessionID'], $this->extraFieldIdNameList['session']);
                 $coachUserName = isset($session['Coach']) ? $session['Coach'] : null;
                 $categoryId = isset($session['category_id']) ? $session['category_id'] : null;
                 // 2014-06-30
                 $dateStart = explode('/', $session['DateStart']);
                 $dateEnd = explode('/', $session['DateEnd']);
                 $visibility = $this->defaultSessionVisibility;
                 $coachId = null;
                 if (!empty($coachUserName)) {
                     $coachInfo = api_get_user_info_from_username($coachUserName);
                     $coachId = $coachInfo['user_id'];
                 }
                 if (empty($sessionId)) {
                     $result = SessionManager::create_session($session['SessionName'], $dateStart[0], $dateStart[1], $dateStart[2], $dateEnd[0], $dateEnd[1], $dateEnd[2], $this->daysCoachAccessBeforeBeginning, $this->daysCoachAccessAfterBeginning, null, $coachUserName, $categoryId, $visibility, 1);
                     if (is_numeric($result)) {
                         $sessionId = $result;
                         SessionManager::update_session_extra_field_value($sessionId, $this->extraFieldIdNameList['session'], $session['SessionID']);
                     }
                 } else {
                     $sessionInfo = api_get_session_info($sessionId);
                     $accessBefore = null;
                     $accessAfter = null;
                     if (empty($sessionInfo['nb_days_access_before_beginning']) || !empty($sessionInfo['nb_days_access_before_beginning']) && $sessionInfo['nb_days_access_before_beginning'] < $this->daysCoachAccessBeforeBeginning) {
                         $accessBefore = intval($this->daysCoachAccessBeforeBeginning);
                     }
                     $accessAfter = null;
                     if (empty($sessionInfo['nb_days_access_after_end']) || !empty($sessionInfo['nb_days_access_after_end']) && $sessionInfo['nb_days_access_after_end'] < $this->daysCoachAccessAfterBeginning) {
                         $accessAfter = intval($this->daysCoachAccessAfterBeginning);
                     }
                     $showDescription = isset($sessionInfo['show_description']) ? $sessionInfo['show_description'] : 1;
                     $result = SessionManager::edit_session($sessionId, $session['SessionName'], $dateStart[0], $dateStart[1], $dateStart[2], $dateEnd[0], $dateEnd[1], $dateEnd[2], $accessBefore, $accessAfter, null, $coachId, $categoryId, $visibility, true, true, null, $showDescription);
                     if (is_numeric($result)) {
                         $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
                         $params = array('description' => $session['SessionDescription']);
                         Database::update($tbl_session, $params, array('id = ?' => $sessionId));
                     }
                 }
                 // Courses
                 $courses = explode('|', $session['Courses']);
                 $courseList = array();
                 foreach ($courses as $course) {
                     $courseArray = bracketsToArray($course);
                     $courseCode = $courseArray[0];
                     if (CourseManager::course_exists($courseCode)) {
                         $courseList[] = $courseCode;
                     }
                 }
                 SessionManager::add_courses_to_session($sessionId, $courseList, true);
                 if (!empty($sessionId)) {
                     $courses = explode('|', $session['Courses']);
                     foreach ($courses as $course) {
                         $courseArray = bracketsToArray($course);
                         $courseCode = $courseArray[0];
                         if (CourseManager::course_exists($courseCode)) {
                             // Coaches
                             $courseCoaches = isset($courseArray[1]) ? $courseArray[1] : null;
                             $courseCoaches = explode(',', $courseCoaches);
                             if (!empty($courseCoaches)) {
                                 $coachList = array();
                                 foreach ($courseCoaches as $courseCoach) {
                                     $courseCoachId = UserManager::get_user_id_from_username($courseCoach);
                                     if ($courseCoachId !== false) {
                                         // Just insert new coaches
                                         $coachList[] = $courseCoachId;
                                     }
                                 }
                                 SessionManager::updateCoaches($sessionId, $courseCode, $coachList, true);
                             }
                             // Students
                             $courseUsers = isset($courseArray[2]) ? $courseArray[2] : null;
                             $courseUsers = explode(',', $courseUsers);
                             if (!empty($courseUsers)) {
                                 $userList = array();
                                 foreach ($courseUsers as $username) {
                                     $userInfo = api_get_user_info_from_username(trim($username));
                                     if (!empty($userInfo)) {
                                         $userList[] = $userInfo['user_id'];
                                     }
                                 }
                                 SessionManager::subscribe_users_to_session_course($userList, $sessionId, $courseCode, SESSION_VISIBLE_READ_ONLY, true);
                             } else {
                                 $this->logger->addInfo("No users to register.");
                             }
                         } else {
                             $this->logger->addInfo("Course does not exists {$courseCode}");
                         }
                     }
                 } else {
                     $this->logger->addInfo('SessionID not found in system.');
                 }
             } else {
                 $this->logger->addInfo('SessionID does not exists');
             }
         }
     } else {
         $this->logger->addInfo($error_message);
     }
 }
/**
 * Creates one session per course with $administratorId as the creator and
 * adds it to the session starting on $startDate and finishing on $endDate
 * @param   array   $courses Courses
 * @param   int     $administratorId Administrator id
 * @param   date    $startDate First day of the month
 * @param   date    $endDate Last day of the month
 * @return  void
 */
function createCourseSessions($courses, $administratorId, $startDate, $endDate)
{
    echo "\n";
    echo $courses ? "Creating sessions and adding courses for the period between " . $startDate . " and " . $endDate : "Every course is already in session for the period between " . $startDate . " and " . $endDate;
    echo "\n=====================================================================================\n\n";
    // Loop through courses creating one session per each and adding them
    foreach ($courses as $course) {
        //$period = date("m/Y", api_strtotime($startDate));
        $month = date("m", api_strtotime($startDate));
        $year = date("Y", api_strtotime($startDate));
        $quarter = getQuarter($month);
        $quarter = getQuarterRoman($quarter);
        $period = $year . '-' . $quarter;
        $sessionName = '[' . $period . '] ' . $course['title'];
        $sessionId = SessionManager::create_session($sessionName, $startDate, $endDate, null, null, null, null, $administratorId, 0, SESSION_INVISIBLE);
        SessionManager::add_courses_to_session($sessionId, array($course['id']));
        echo "Session '" . $sessionName . "' created.\nCourse '" . $course['title'] . "' added.\n\n";
    }
}
Ejemplo n.º 6
0
function WSCreateSession($params)
{
    global $debug;
    $sessionAdminId = 1;
    if (!WSHelperVerifyKey($params)) {
        return returnError(WS_ERROR_SECRET_KEY);
    }
    $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
    error_log(print_r($params, 1));
    $sessions_params = $params['sessions'];
    $results = array();
    $orig_session_id_value = array();
    foreach ($sessions_params as $session_param) {
        $name = trim($session_param['name']);
        $year_start = intval($session_param['year_start']);
        $month_start = intval($session_param['month_start']);
        $day_start = intval($session_param['day_start']);
        $year_end = intval($session_param['year_end']);
        $month_end = intval($session_param['month_end']);
        $day_end = intval($session_param['day_end']);
        $nb_days_access_before = intval($session_param['nb_days_access_before']);
        $nb_days_access_after = intval($session_param['nb_days_access_after']);
        $id_coach = $session_param['user_id'];
        $nolimit = $session_param['nolimit'];
        $original_session_id_name = $session_param['original_session_id_name'];
        $original_session_id_value = $session_param['original_session_id_value'];
        $orig_session_id_value[] = $session_param['original_session_id_value'];
        $extra_list = isset($session_param['extra']) ? $session_param['extra'] : '';
        $sessionId = SessionManager::getSessionIdFromOriginalId($original_session_id_value, $original_session_id_name);
        if (!empty($sessionId)) {
            if ($debug) {
                error_log("session with external session id '{$original_session_id_value}' with '{$name}' exists");
            }
            $results[] = 0;
            continue;
        }
        if (empty($nolimit)) {
            $date_start = "{$year_start}-" . ($month_start < 10 ? "0{$month_start}" : $month_start) . "-" . ($day_start < 10 ? "0{$day_start}" : $day_start) . ' 00:00:00';
            $date_end = "{$year_end}-" . ($month_end < 10 ? "0{$month_end}" : $month_end) . "-" . ($day_end < 10 ? "0{$day_end}" : $day_end) . ' 23:59:59';
        } else {
            $date_start = "";
            $date_end = "";
        }
        if (empty($name)) {
            if ($debug) {
                error_log("session has no name");
            }
            $results[] = 0;
            continue;
        } elseif (empty($nolimit) && (!$month_start || !$day_start || !$year_start || !checkdate($month_start, $day_start, $year_start))) {
            if ($debug) {
                error_log("There's an error with the start date: {$month_start} - {$day_start} - {$year_start}");
            }
            $results[] = 0;
            continue;
        } elseif (empty($nolimit) && (!$month_end || !$day_end || !$year_end || !checkdate($month_end, $day_end, $year_end))) {
            $results[] = 0;
            if ($debug) {
                error_log("There's an error with the end date: {$month_end} - {$day_end} - {$year_end}");
            }
            continue;
        } elseif (empty($nolimit) && $date_start >= $date_end) {
            $results[] = 0;
            if ($debug) {
                error_log("There's an error with the start and end date");
            }
            continue;
        } else {
            $rs = Database::query("SELECT 1 FROM {$tbl_session} WHERE name='" . addslashes($name) . "'");
            if (Database::num_rows($rs)) {
                if ($debug) {
                    error_log("Session with name '{$name}' already exists");
                }
                $results[] = 0;
                continue;
            } else {
                $coachStartDate = '';
                if ($date_start) {
                    $startDate = new DateTime($date_start);
                    $diffStart = new DateInterval("P" . $nb_days_access_before . "D");
                    $coachStartDate = $startDate->sub($diffStart);
                    $coachStartDate = $coachStartDate->format('Y-m-d H:i:s');
                }
                $coachEndDate = '';
                if ($date_end) {
                    $endDate = new DateTime($date_end);
                    $diffEnd = new DateInterval("P" . $nb_days_access_after . "D");
                    $coachEndDate = $endDate->add($diffEnd);
                    $coachEndDate = $coachEndDate->format('Y-m-d H:i:s');
                }
                $id_session = SessionManager::create_session($name, $date_start, $date_end, $date_start, $date_end, $coachStartDate, $coachEndDate, $id_coach, 0, 1, false, null, null, 0, array(), $sessionAdminId);
                if ($id_session) {
                    if ($debug) {
                        error_log("Session created '{$id_session}' ");
                    }
                    // Save new fieldlabel into course_field table.
                    SessionManager::create_session_extra_field($original_session_id_name, 1, $original_session_id_name);
                    // Save the external system's id into user_field_value table.
                    SessionManager::update_session_extra_field_value($id_session, $original_session_id_name, $original_session_id_value);
                    if (is_array($extra_list) && count($extra_list) > 0) {
                        foreach ($extra_list as $extra) {
                            $extra_field_name = $extra['field_name'];
                            $extra_field_value = $extra['field_value'];
                            // Save new fieldlabel into course_field table.
                            SessionManager::create_session_extra_field($extra_field_name, 1, $extra_field_name);
                            // Save the external system's id into course_field_value table.
                            SessionManager::update_session_extra_field_value($id_session, $extra_field_name, $extra_field_value);
                        }
                    }
                    $results[] = $id_session;
                } else {
                    if ($debug) {
                        error_log("There was an error when trying to save session with name {$name}");
                    }
                }
            }
        }
    }
    // end principal foreach
    $count_results = count($results);
    $output = array();
    for ($i = 0; $i < $count_results; $i++) {
        $output[] = array('original_session_id_value' => $orig_session_id_value[$i], 'result' => $results[$i]);
    }
    return $output;
}
Ejemplo n.º 7
0
        $month_end = $_POST['month_end'];
        $day_end = $_POST['day_end'];
        $nb_days_acess_before = $_POST['nb_days_acess_before'];
        $nb_days_acess_after = $_POST['nb_days_acess_after'];
        $coach_username = $_POST['coach_username'];
        $id_session_category = $_POST['session_category'];
        $id_visibility = $_POST['session_visibility'];
        $end_limit = $_POST['end_limit'];
        $start_limit = $_POST['start_limit'];
        $duration = isset($_POST['duration']) ? $_POST['duration'] : null;
        if (empty($end_limit) && empty($start_limit)) {
            $nolimit = 1;
        } else {
            $nolimit = null;
        }
        $return = SessionManager::create_session($name, $year_start, $month_start, $day_start, $year_end, $month_end, $day_end, $nb_days_acess_before, $nb_days_acess_after, $nolimit, $coach_username, $id_session_category, $id_visibility, $start_limit, $end_limit, $duration);
        if ($return == strval(intval($return))) {
            // integer => no error on session creation
            header('Location: add_courses_to_session.php?id_session=' . $return . '&add=true&msg=');
            exit;
        }
    } else {
        header('Location: ' . api_get_self());
        exit;
    }
}
$token = Security::get_token();
global $_configuration;
$defaultBeforeDays = isset($_configuration['session_days_before_coach_access']) ? $_configuration['session_days_before_coach_access'] : 0;
$defaultAfterDays = isset($_configuration['session_days_after_coach_access']) ? $_configuration['session_days_after_coach_access'] : 0;
$nb_days_acess_before = $defaultBeforeDays;
Ejemplo n.º 8
0
    $displayendDate = $params['display_end_date'];
    $coachStartDate = $params['coach_access_start_date'];
    $coachEndDate = $params['coach_access_end_date'];
    $coach_username = intval($params['coach_username']);
    $id_session_category = $params['session_category'];
    $id_visibility = $params['session_visibility'];
    $duration = isset($params['duration']) ? $params['duration'] : null;
    $description = $params['description'];
    $showDescription = isset($params['show_description']) ? 1 : 0;
    $sendSubscritionNotification = isset($params['send_subscription_notification']);
    $extraFields = array();
    foreach ($params as $key => $value) {
        if (strpos($key, 'extra_') === 0) {
            $extraFields[$key] = $value;
        }
    }
    $return = SessionManager::create_session($name, $startDate, $endDate, $displayStartDate, $displayendDate, $coachStartDate, $coachEndDate, $coach_username, $id_session_category, $id_visibility, false, $duration, $description, $showDescription, $extraFields, null, $sendSubscritionNotification);
    if ($return == strval(intval($return))) {
        // integer => no error on session creation
        header('Location: add_courses_to_session.php?id_session=' . $return . '&add=true&msg=');
        exit;
    }
}
Display::display_header($tool_name);
if (!empty($return)) {
    Display::display_error_message($return, false);
}
echo '<div class="actions">';
echo '<a href="../session/session_list.php">' . Display::return_icon('back.png', get_lang('BackTo') . ' ' . get_lang('PlatformAdmin'), '', ICON_SIZE_MEDIUM) . '</a>';
echo '</div>';
$form->display();