if (isset($infoLesson)) {
     try {
         $result = eF_getTableData("user_times ut join users_to_lessons ul on ut.users_LOGIN=ul.users_LOGIN and ut.lessons_ID=ul.lessons_ID", "sum(time) as sum, count(distinct ul.users_LOGIN) as count", "completed=1 and ul.archive=0 and ut.lessons_ID=" . $infoLesson->lesson['id'], "", "");
         if ($result[0]['sum']) {
             $smarty->assign("T_AVERAGE_COMPLETION_TIME", EfrontTimes::formatTimeForReporting($result[0]['sum'] / $result[0]['count']));
         }
         require_once $path . "includes/statistics/stats_filters.php";
         $directionsTree = new EfrontDirectionsTree();
         $directionsPaths = $directionsTree->toPathString();
         $roles = EfrontLessonUser::getLessonsRoles(true);
         $smarty->assign("T_ROLES_ARRAY", $roles);
         $rolesBasic = EfrontLessonUser::getLessonsRoles();
         $smarty->assign("T_BASIC_ROLES_ARRAY", $rolesBasic);
         foreach ($rolesBasic as $key => $role) {
             $constraints = array('archive' => false, 'table_filters' => $stats_filters, 'condition' => 'ul.user_type = "' . $key . '"');
             $numUsers = $infoLesson->countLessonUsers($constraints);
             if ($numUsers) {
                 $usersPerRole[$key] = $numUsers;
             }
             //$role == 'student' ? $studentRoles[] = $key : $professorRoles[] = $key;
         }
         $infoLesson->lesson['users_per_role'] = $usersPerRole;
         $infoLesson->lesson['num_users'] = array_sum($usersPerRole);
         /*
         	    	$constraints = array('archive' => false, 'table_filters' => $stats_filters, 'condition' => 'ul.user_type in ("'.implode('","', $studentRoles).'")');
                 	$infoLesson -> lesson['num_students']   = ($infoLesson -> countLessonUsers($constraints));
         	    	$constraints = array('archive' => false, 'table_filters' => $stats_filters, 'condition' => 'ul.user_type in ("'.implode('","', $professorRoles).'")');
                 	$infoLesson -> lesson['num_professors'] = ($infoLesson -> countLessonUsers($constraints));
         */
         $infoLesson->lesson['category_path'] = $directionsPaths[$infoLesson->lesson['directions_ID']];
         $smarty->assign("T_CURRENT_LESSON_INFO", $infoLesson);