diff vendor/symfony/validator/Constraints/IssnValidator.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/validator/Constraints/IssnValidator.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,133 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * 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 ISSN.
+ *
+ * @author Antonio J. García Lagar <[e-mail]>
+ * @author Bernhard Schussek <[e-mail]>
+ *
+ * @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, __NAMESPACE__.'\Issn');
+        }
+
+        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 = $value;
+
+        // 1234-567X
+        //     ^
+        if (isset($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) * $canonical[$i];
+        }
+
+        if (0 !== $checkSum % 11) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode(Issn::CHECKSUM_FAILED_ERROR)
+                ->addViolation();
+        }
+    }
+}