class UniqueLabelInListConstraintValidator in Drupal 10

Uniquely labeled list item constraint validator.

@internal

Hierarchy

• class \Drupal\ckeditor5\Plugin\Validation\Constraint\UniqueLabelInListConstraintValidator extends \Symfony\Component\Validator\ConstraintValidator

File

core/modules/ckeditor5/src/Plugin/Validation/Constraint/UniqueLabelInListConstraintValidator.php, line 16

Namespace

Drupal\ckeditor5\Plugin\Validation\Constraint

class UniqueLabelInListConstraintValidator extends ConstraintValidator {

  /**
   * {@inheritdoc}
   *
   * @throws \Symfony\Component\Validator\Exception\UnexpectedTypeException
   *   Thrown when the given constraint is not supported by this validator.
   */
  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();
      }
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
UniqueLabelInListConstraintValidator::validate	public	function