132 lines
4.1 KiB
PHP
132 lines
4.1 KiB
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\Validator\Constraint;
|
|
use Symfony\Component\Validator\ConstraintValidator;
|
|
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
|
|
use Symfony\Component\Validator\Exception\UnexpectedValueException;
|
|
|
|
/**
|
|
* Validates whether the value is a valid ISSN.
|
|
*
|
|
* @author Antonio J. García Lagar <aj@garcialagar.es>
|
|
* @author Bernhard Schussek <bschussek@gmail.com>
|
|
*
|
|
* @see https://en.wikipedia.org/wiki/Issn
|
|
*/
|
|
class IssnValidator extends ConstraintValidator
|
|
{
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function validate($value, Constraint $constraint)
|
|
{
|
|
if (!$constraint instanceof Issn) {
|
|
throw new UnexpectedTypeException($constraint, Issn::class);
|
|
}
|
|
|
|
if (null === $value || '' === $value) {
|
|
return;
|
|
}
|
|
|
|
if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
|
|
throw new UnexpectedValueException($value, 'string');
|
|
}
|
|
|
|
$value = (string) $value;
|
|
$canonical = $value;
|
|
|
|
// 1234-567X
|
|
// ^
|
|
if (isset($canonical[4]) && '-' === $canonical[4]) {
|
|
// remove hyphen
|
|
$canonical = substr($canonical, 0, 4).substr($canonical, 5);
|
|
} elseif ($constraint->requireHyphen) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::MISSING_HYPHEN_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
$length = \strlen($canonical);
|
|
|
|
if ($length < 8) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::TOO_SHORT_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
if ($length > 8) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::TOO_LONG_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
// 1234567X
|
|
// ^^^^^^^ digits only
|
|
if (!ctype_digit(substr($canonical, 0, 7))) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::INVALID_CHARACTERS_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
// 1234567X
|
|
// ^ digit, x or X
|
|
if (!ctype_digit($canonical[7]) && 'x' !== $canonical[7] && 'X' !== $canonical[7]) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::INVALID_CHARACTERS_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
// 1234567X
|
|
// ^ case-sensitive?
|
|
if ($constraint->caseSensitive && 'x' === $canonical[7]) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::INVALID_CASE_ERROR)
|
|
->addViolation();
|
|
|
|
return;
|
|
}
|
|
|
|
// Calculate a checksum. "X" equals 10.
|
|
$checkSum = 'X' === $canonical[7] || 'x' === $canonical[7] ? 10 : $canonical[7];
|
|
|
|
for ($i = 0; $i < 7; ++$i) {
|
|
// Multiply the first digit by 8, the second by 7, etc.
|
|
$checkSum += (8 - $i) * (int) $canonical[$i];
|
|
}
|
|
|
|
if (0 !== $checkSum % 11) {
|
|
$this->context->buildViolation($constraint->message)
|
|
->setParameter('{{ value }}', $this->formatValue($value))
|
|
->setCode(Issn::CHECKSUM_FAILED_ERROR)
|
|
->addViolation();
|
|
}
|
|
}
|
|
}
|