/**
* Validate that the manual grade submitted for a particular question is in range.
* @param int $qubaid the question_usage id.
* @param int $slot the slot number within the usage.
* @return bool whether the submitted data is in range.
*/
public static function is_manual_grade_in_range($qubaid, $slot)
{
$prefix = 'q' . $qubaid . ':' . $slot . '_';
$mark = question_utils::optional_param_mark($prefix . '-mark');
$maxmark = optional_param($prefix . '-maxmark', null, PARAM_FLOAT);
$minfraction = optional_param($prefix . ':minfraction', null, PARAM_FLOAT);
$maxfraction = optional_param($prefix . ':maxfraction', null, PARAM_FLOAT);
return is_null($mark) || $mark >= $minfraction * $maxmark && $mark <= $maxfraction * $maxmark;
}
