public static function lesson($level, $lesson, $method_name = 'undefined_method')
{
if (array_key_exists($level, self::$valid) && array_key_exists($lesson, self::$valid[$level])) {
return true;
}
if (!Validate::level($level, $method_name)) {
return false;
}
$final_lesson = max(App::getLessons($level));
if (Number::isInteger($lesson) && $lesson > 0 && $lesson <= $final_lesson['lesson']) {
self::$valid[$level][$lesson] = true;
return true;
}
Log::error("Invalid level, lesson tuple ({$level}, {$lesson}) in {$method_name}()");
return false;
}
