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IsinValidator.php
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IsinValidator.php
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<?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\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\UnexpectedValueException;
/**
* @author Laurent Masforné <l.masforne@gmail.com>
*
* @see https://en.wikipedia.org/wiki/International_Securities_Identification_Number
*/
class IsinValidator extends ConstraintValidator
{
public function validate(mixed $value, Constraint $constraint)
{
if (!$constraint instanceof Isin) {
throw new UnexpectedTypeException($constraint, Isin::class);
}
if (null === $value || '' === $value) {
return;
}
if (!\is_scalar($value) && !$value instanceof \Stringable) {
throw new UnexpectedValueException($value, 'string');
}
$value = strtoupper($value);
if (Isin::VALIDATION_LENGTH !== \strlen($value)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Isin::INVALID_LENGTH_ERROR)
->addViolation();
return;
}
if (!preg_match(Isin::VALIDATION_PATTERN, $value)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Isin::INVALID_PATTERN_ERROR)
->addViolation();
return;
}
if (!$this->isCorrectChecksum($value)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Isin::INVALID_CHECKSUM_ERROR)
->addViolation();
}
}
private function isCorrectChecksum(string $input): bool
{
$characters = str_split($input);
foreach ($characters as $i => $char) {
$characters[$i] = \intval($char, 36);
}
$number = implode('', $characters);
return 0 === $this->context->getValidator()->validate($number, new Luhn())->count();
}
}