ÿØÿàJFIFÿþ ÿÛC       ÿÛC ÿÀÿÄÿÄ"#QrÿÄÿÄ&1!A"2qQaáÿÚ ?Øy,æ/3JæÝ¹È߲؋5êXw²±ÉyˆR”¾I0ó2—PI¾IÌÚiMö¯–þrìN&"KgX:Šíµ•nTJnLK„…@!‰-ý ùúmë;ºgµŒ&ó±hw’¯Õ@”Ü— 9ñ-ë.²1<yà‚¹ïQÐU„ہ?.’¦èûbß±©Ö«Âw*VŒ) `$‰bØÔŸ’ëXÖ-ËTÜíGÚ3ð«g Ÿ§¯—Jx„–’U/ÂÅv_s(Hÿ@TñJÑãõçn­‚!ÈgfbÓc­:él[ðQe 9ÀPLbÃãCµm[5¿ç'ªjglå‡Ûí_§Úõl-;"PkÞÞÁQâ¼_Ñ^¢SŸx?"¸¦ùY騐ÒOÈ q’`~~ÚtËU¹CڒêV  I1Áß_ÿÙ * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Validator\Constraints; use Symfony\Component\Validator\Constraint; use Symfony\Component\Validator\ConstraintValidator; use Symfony\Component\Validator\Exception\UnexpectedTypeException; /** * Validates whether the value is a valid ISBN-10 or ISBN-13. * * @author The Whole Life To Learn * * @see https://en.wikipedia.org/wiki/Isbn */ class IsbnValidator extends ConstraintValidator { /** * {@inheritDoc} */ public function validate($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); } } } }