--- /dev/null
+<?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\Context\ExecutionContextInterface;
+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>
+ * @author Manuel Reinhard <manu@sprain.ch>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @see https://en.wikipedia.org/wiki/Isbn
+ */
+class IsbnValidator extends ConstraintValidator
+{
+ /**
+ * {@inheritdoc}
+ */
+ public function validate($value, Constraint $constraint)
+ {
+ if (!$constraint instanceof Isbn) {
+ throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Isbn');
+ }
+
+ if (null === $value || '' === $value) {
+ return;
+ }
+
+ if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+ throw new UnexpectedTypeException($value, 'string');
+ }
+
+ $value = (string) $value;
+ $canonical = str_replace('-', '', $value);
+
+ if (null === $constraint->type) {
+ if ($constraint->isbn10 && !$constraint->isbn13) {
+ @trigger_error('The "isbn10" option of the Isbn constraint is deprecated since version 2.5 and will be removed in 3.0. Use the "type" option instead.', E_USER_DEPRECATED);
+ $constraint->type = 'isbn10';
+ } elseif ($constraint->isbn13 && !$constraint->isbn10) {
+ @trigger_error('The "isbn13" option of the Isbn constraint is deprecated since version 2.5 and will be removed in 3.0. Use the "type" option instead.', E_USER_DEPRECATED);
+ $constraint->type = 'isbn13';
+ }
+ }
+
+ // Explicitly validate against ISBN-10
+ if ('isbn10' === $constraint->type) {
+ if (true !== ($code = $this->validateIsbn10($canonical))) {
+ if ($this->context instanceof ExecutionContextInterface) {
+ $this->context->buildViolation($this->getMessage($constraint, $constraint->type))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ } else {
+ $this->buildViolation($this->getMessage($constraint, $constraint->type))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ }
+ }
+
+ return;
+ }
+
+ // Explicitly validate against ISBN-13
+ if ('isbn13' === $constraint->type) {
+ if (true !== ($code = $this->validateIsbn13($canonical))) {
+ if ($this->context instanceof ExecutionContextInterface) {
+ $this->context->buildViolation($this->getMessage($constraint, $constraint->type))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ } else {
+ $this->buildViolation($this->getMessage($constraint, $constraint->type))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ }
+ }
+
+ return;
+ }
+
+ // Try both ISBNs
+
+ // First, try ISBN-10
+ $code = $this->validateIsbn10($canonical);
+
+ // The ISBN can only be an ISBN-13 if the value was too long for ISBN-10
+ if (Isbn::TOO_LONG_ERROR === $code) {
+ // Try ISBN-13 now
+ $code = $this->validateIsbn13($canonical);
+
+ // If too short, this means we have 11 or 12 digits
+ if (Isbn::TOO_SHORT_ERROR === $code) {
+ $code = Isbn::TYPE_NOT_RECOGNIZED_ERROR;
+ }
+ }
+
+ if (true !== $code) {
+ if ($this->context instanceof ExecutionContextInterface) {
+ $this->context->buildViolation($this->getMessage($constraint))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ } else {
+ $this->buildViolation($this->getMessage($constraint))
+ ->setParameter('{{ value }}', $this->formatValue($value))
+ ->setCode($code)
+ ->addViolation();
+ }
+ }
+ }
+
+ protected function validateIsbn10($isbn)
+ {
+ // Choose an algorithm so that ERROR_INVALID_CHARACTERS is preferred
+ // over ERROR_TOO_SHORT/ERROR_TOO_LONG
+ // Otherwise "0-45122-5244" passes, but "0-45122_5244" reports
+ // "too long"
+
+ // Error priority:
+ // 1. ERROR_INVALID_CHARACTERS
+ // 2. ERROR_TOO_SHORT/ERROR_TOO_LONG
+ // 3. ERROR_CHECKSUM_FAILED
+
+ $checkSum = 0;
+
+ for ($i = 0; $i < 10; ++$i) {
+ // If we test the length before the loop, we get an ERROR_TOO_SHORT
+ // when actually an ERROR_INVALID_CHARACTERS is wanted, e.g. for
+ // "0-45122_5244" (typo)
+ if (!isset($isbn[$i])) {
+ return Isbn::TOO_SHORT_ERROR;
+ }
+
+ if ('X' === $isbn[$i]) {
+ $digit = 10;
+ } elseif (ctype_digit($isbn[$i])) {
+ $digit = $isbn[$i];
+ } else {
+ return Isbn::INVALID_CHARACTERS_ERROR;
+ }
+
+ $checkSum += $digit * (10 - $i);
+ }
+
+ if (isset($isbn[$i])) {
+ return Isbn::TOO_LONG_ERROR;
+ }
+
+ return 0 === $checkSum % 11 ? true : Isbn::CHECKSUM_FAILED_ERROR;
+ }
+
+ protected function validateIsbn13($isbn)
+ {
+ // Error priority:
+ // 1. ERROR_INVALID_CHARACTERS
+ // 2. ERROR_TOO_SHORT/ERROR_TOO_LONG
+ // 3. ERROR_CHECKSUM_FAILED
+
+ if (!ctype_digit($isbn)) {
+ return Isbn::INVALID_CHARACTERS_ERROR;
+ }
+
+ $length = strlen($isbn);
+
+ if ($length < 13) {
+ return Isbn::TOO_SHORT_ERROR;
+ }
+
+ if ($length > 13) {
+ return Isbn::TOO_LONG_ERROR;
+ }
+
+ $checkSum = 0;
+
+ for ($i = 0; $i < 13; $i += 2) {
+ $checkSum += $isbn[$i];
+ }
+
+ for ($i = 1; $i < 12; $i += 2) {
+ $checkSum += $isbn[$i]
+ * 3;
+ }
+
+ return 0 === $checkSum % 10 ? true : Isbn::CHECKSUM_FAILED_ERROR;
+ }
+
+ protected function getMessage($constraint, $type = null)
+ {
+ if (null !== $constraint->message) {
+ return $constraint->message;
+ } elseif ('isbn10' === $type) {
+ return $constraint->isbn10Message;
+ } elseif ('isbn13' === $type) {
+ return $constraint->isbn13Message;
+ }
+
+ return $constraint->bothIsbnMessage;
+ }
+}
projects / yaffs-website / blobdiff