BicValidator.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\PropertyAccess\Exception\NoSuchPropertyException;
use Symfony\Component\PropertyAccess\PropertyAccess;
use Symfony\Component\PropertyAccess\PropertyAccessor;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\ConstraintDefinitionException;

/**
 * @author Michael Hirschler <michael.vhirsch@gmail.com>
 *
 * @see https://en.wikipedia.org/wiki/ISO_9362#Structure
 */
class BicValidator extends ConstraintValidator
{
    private $propertyAccessor;

    public function __construct(PropertyAccessor $propertyAccessor = null)
    {
        $this->propertyAccessor = $propertyAccessor;
    }

    /**
     * {@inheritdoc}
     */
    public function validate($value, Constraint $constraint)
    {
        if (null === $value || '' === $value) {
            return;
        }

        $canonicalize = str_replace(' ', '', $value);

        // the bic must be either 8 or 11 characters long
        if (!\in_array(\strlen($canonicalize), array(8, 11))) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setCode(Bic::INVALID_LENGTH_ERROR)
                ->addViolation();

            return;
        }

        // must contain alphanumeric values only
        if (!ctype_alnum($canonicalize)) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setCode(Bic::INVALID_CHARACTERS_ERROR)
                ->addViolation();

            return;
        }

        // first 4 letters must be alphabetic (bank code)
        if (!ctype_alpha(substr($canonicalize, 0, 4))) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setCode(Bic::INVALID_BANK_CODE_ERROR)
                ->addViolation();

            return;
        }

        // next 2 letters must be alphabetic (country code)
        if (!ctype_alpha(substr($canonicalize, 4, 2))) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setCode(Bic::INVALID_COUNTRY_CODE_ERROR)
                ->addViolation();

            return;
        }

        // should contain uppercase characters only
        if (strtoupper($canonicalize) !== $canonicalize) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setCode(Bic::INVALID_CASE_ERROR)
                ->addViolation();

            return;
        }

        // check against an IBAN
        if ($path = $constraint->ibanPropertyPath) {
            if (null !== $object = $this->context->getObject()) {
                try {
                    $iban = $this->getPropertyAccessor()->getValue($object, $path);
                } catch (NoSuchPropertyException $e) {
                    throw new ConstraintDefinitionException(sprintf('Invalid property path "%s" provided to "%s" constraint: %s', $path, \get_class($constraint), $e->getMessage()), 0, $e);
                }
            }
        } else {
            $iban = $constraint->iban;
        }
        if (!isset($iban) || !$iban) {
            return;
        }
        $ibanCountryCode = substr($iban, 0, 2);
        if (ctype_alpha($ibanCountryCode) && substr($canonicalize, 4, 2) !== $ibanCountryCode) {
            $this->context->buildViolation($constraint->ibanMessage)
                ->setParameter('{{ value }}', $this->formatValue($value))
                ->setParameter('{{ iban }}', $iban)
                ->setCode(Bic::INVALID_IBAN_COUNTRY_CODE_ERROR)
                ->addViolation();
        }
    }

    private function getPropertyAccessor()
    {
        if (null === $this->propertyAccessor) {
            $this->propertyAccessor = PropertyAccess::createPropertyAccessor();
        }

        return $this->propertyAccessor;
    }
}