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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;
/**
* Validates whether the value is a valid ISBN-10 or ISBN-13.
*
* @author The Whole Life To Learn <thewholelifetolearn@gmail.com>
*
* @see https://en.wikipedia.org/wiki/Isbn
*/
class IsbnValidator extends ConstraintValidator
{
/**
* {@inheritDoc}
*/
public function validate($value, Constraint $constraint)
{
if (null === $value || '' === $value) {
return;
}
if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedTypeException($value, 'string');
}
if (!is_numeric($value)) {
$value = str_replace('-', '', $value);
}
$validation = 0;
$value = strtoupper($value);
$valueLength = strlen($value);
if (10 === $valueLength && null !== $constraint->isbn10) {
for ($i = 0; $i < 10; $i++) {
if ($value[$i] == 'X') {
$validation += 10 * intval(10 - $i);
} else {
$validation += intval($value[$i]) * intval(10 - $i);
}
}
if ($validation % 11 != 0) {
if (null !== $constraint->isbn13) {
$this->context->addViolation($constraint->bothIsbnMessage);
} else {
$this->context->addViolation($constraint->isbn10Message);
}
}
} elseif (13 === $valueLength && null !== $constraint->isbn13) {
for ($i = 0; $i < 13; $i += 2) {
$validation += intval($value[$i]);
}
for ($i = 1; $i < 12; $i += 2) {
$validation += intval($value[$i]) * 3;
}
if ($validation % 10 != 0) {
if (null !== $constraint->isbn10) {
$this->context->addViolation($constraint->bothIsbnMessage);
} else {
$this->context->addViolation($constraint->isbn13Message);
}
}
} else {
if (null !== $constraint->isbn10 && null !== $constraint->isbn13) {
$this->context->addViolation($constraint->bothIsbnMessage);
} elseif (null !== $constraint->isbn10) {
$this->context->addViolation($constraint->isbn10Message);
} else {
$this->context->addViolation($constraint->isbn13Message);
}
}
}
}