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vendor/symfony/validator/Constraints/EmailValidator.php

@@ -0,0 +1,135 @@
+<?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 Egulias\EmailValidator\Validation\EmailValidation;
+use Egulias\EmailValidator\Validation\NoRFCWarningsValidation;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\RuntimeException;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class EmailValidator extends ConstraintValidator
+{
+    private $isStrict;
+
+    /**
+     * @param bool $strict
+     */
+    public function __construct($strict = false)
+    {
+        $this->isStrict = $strict;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Email) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Email');
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedTypeException($value, 'string');
+        }
+
+        $value = (string) $value;
+
+        if (null === $constraint->strict) {
+            $constraint->strict = $this->isStrict;
+        }
+
+        if ($constraint->strict) {
+            if (!class_exists('\Egulias\EmailValidator\EmailValidator')) {
+                throw new RuntimeException('Strict email validation requires egulias/email-validator ~1.2|~2.0');
+            }
+
+            $strictValidator = new \Egulias\EmailValidator\EmailValidator();
+
+            if (interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, new NoRFCWarningsValidation())) {
+                $this->context->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($value))
+                    ->setCode(Email::INVALID_FORMAT_ERROR)
+                    ->addViolation();
+
+                return;
+            } elseif (!interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, false, true)) {
+                $this->context->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($value))
+                    ->setCode(Email::INVALID_FORMAT_ERROR)
+                    ->addViolation();
+
+                return;
+            }
+        } elseif (!preg_match('/^.+\@\S+\.\S+$/', $value)) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode(Email::INVALID_FORMAT_ERROR)
+                ->addViolation();
+
+            return;
+        }
+
+        $host = (string) substr($value, strrpos($value, '@') + 1);
+
+        // Check for host DNS resource records
+        if ($constraint->checkMX) {
+            if (!$this->checkMX($host)) {
+                $this->context->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($value))
+                    ->setCode(Email::MX_CHECK_FAILED_ERROR)
+                    ->addViolation();
+            }
+
+            return;
+        }
+
+        if ($constraint->checkHost && !$this->checkHost($host)) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode(Email::HOST_CHECK_FAILED_ERROR)
+                ->addViolation();
+        }
+    }
+
+    /**
+     * Check DNS Records for MX type.
+     *
+     * @param string $host Host
+     *
+     * @return bool
+     */
+    private function checkMX($host)
+    {
+        return '' !== $host && checkdnsrr($host, 'MX');
+    }
+
+    /**
+     * Check if one of MX, A or AAAA DNS RR exists.
+     *
+     * @param string $host Host
+     *
+     * @return bool
+     */
+    private function checkHost($host)
+    {
+        return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
+    }
+}