Add Luhn validator
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src/Symfony/Component/Validator/Constraints/Luhn.php
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src/Symfony/Component/Validator/Constraints/Luhn.php
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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/**
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* Metadata for the LuhnValidator.
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*
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* @Annotation
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*/
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class Luhn extends Constraint
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{
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public $message = 'Invalid card number';
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}
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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/**
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* Validates a PAN using the LUHN Algorithm
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*
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* For a list of example card numbers that are used to test this
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* class, please see the LuhnValidatorTest class.
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*
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* @see http://en.wikipedia.org/wiki/Luhn_algorithm
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* @author Tim Nagel <t.nagel@infinite.net.au>
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* @author Greg Knapp http://gregk.me/2011/php-implementation-of-bank-card-luhn-algorithm/
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*/
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class LuhnValidator extends ConstraintValidator
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{
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/**
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* Validates a creditcard number with the Luhn algorithm.
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*
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* @param mixed $value
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* @param Constraint $constraint
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*/
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public function validate($value, Constraint $constraint)
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{
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if (null === $value || '' === $value) {
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return;
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}
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if (!is_numeric($value)) {
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$this->context->addViolation($constraint->message);
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return;
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}
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$length = strlen($value);
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$oddLength = $length % 2;
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for ($sum = 0, $i = $length - 1; $i >= 0; $i--) {
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$digit = (int) $value[$i];
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$sum += (($i % 2) === $oddLength) ? array_sum(str_split($digit * 2)) : $digit;
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}
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if (($sum % 10) !== 0) {
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$this->context->addViolation($constraint->message);
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}
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}
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}
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Tests\Constraints;
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use Symfony\Component\Validator\Constraints\Luhn;
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use Symfony\Component\Validator\Constraints\LuhnValidator;
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class LuhnValidatorTest extends \PHPUnit_Framework_TestCase
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{
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protected $context;
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protected $validator;
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protected function setUp()
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{
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$this->context = $this->getMock('Symfony\Component\Validator\ExecutionContext', array(), array(), '', false);
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$this->validator = new LuhnValidator();
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$this->validator->initialize($this->context);
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}
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protected function tearDown()
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{
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$this->context = null;
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$this->validator = null;
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}
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public function testNullIsValid()
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{
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$this->context->expects($this->never())
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->method('addViolation');
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$this->validator->validate(null, new Luhn());
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}
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public function testEmptyStringIsValid()
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{
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$this->context->expects($this->never())
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->method('addViolation');
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$this->validator->validate('', new Luhn());
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}
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/**
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* @dataProvider getValidNumbers
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*/
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public function testValidNumbers($number)
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{
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$this->context->expects($this->never())
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->method('addViolation');
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$this->validator->validate($number, new Luhn());
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}
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public function getValidNumbers()
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{
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return array(
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array('42424242424242424242'),
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array('378282246310005'),
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array('371449635398431'),
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array('378734493671000'),
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array('5610591081018250'),
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array('30569309025904'),
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array('38520000023237'),
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array('6011111111111117'),
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array('6011000990139424'),
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array('3530111333300000'),
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array('3566002020360505'),
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array('5555555555554444'),
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array('5105105105105100'),
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array('4111111111111111'),
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array('4012888888881881'),
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array('4222222222222'),
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array('5019717010103742'),
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array('6331101999990016'),
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);
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}
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/**
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* @dataProvider getInvalidNumbers
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*/
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public function testInvalidNumbers($number)
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{
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$constraint = new Luhn();
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$this->context->expects($this->once())
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->method('addViolation')
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->with($constraint->message);
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$this->validator->validate($number, $constraint);
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}
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public function getInvalidNumbers()
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{
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return array(
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array('1234567812345678'),
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array('4222222222222222'),
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);
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}
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}
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