function UniqueLabelInListConstraintValidator::validate

Throws

\Symfony\Component\Validator\Exception\UnexpectedTypeException Thrown when the given constraint is not supported by this validator.

File

core/modules/ckeditor5/src/Plugin/Validation/Constraint/UniqueLabelInListConstraintValidator.php, line 24

Class

UniqueLabelInListConstraintValidator

Uniquely labeled list item constraint validator.

Namespace

Code

public function validate($list, Constraint $constraint) {
    if (!$constraint instanceof UniqueLabelInListConstraint) {
        throw new UnexpectedTypeException($constraint, UniqueLabelInListConstraint::class);
    }
    $labels = array_column($list, $constraint->labelKey);
    $label_frequencies = array_count_values($labels);
    foreach ($label_frequencies as $label => $frequency) {
        if ($frequency > 1) {
            $this->context
                ->buildViolation($constraint->message)
                ->setParameter('%label', $label)
                ->addViolation();
        }
    }
}