private function UuidValidator::validateStrict in Plug 7

1 call to UuidValidator::validateStrict()

UuidValidator::validate in lib/Symfony/validator/Symfony/Component/Validator/Constraints/UuidValidator.php

Checks if the passed value is valid.

File

lib/Symfony/validator/Symfony/Component/Validator/Constraints/UuidValidator.php, line 168

Class

UuidValidator

Validates whether the value is a valid UUID per RFC 4122.

Namespace

Symfony\Component\Validator\Constraints

Code

private function validateStrict($value, Uuid $constraint) {

  // Error priority:
  // 1. ERROR_INVALID_CHARACTERS
  // 2. ERROR_INVALID_HYPHEN_PLACEMENT
  // 3. ERROR_TOO_SHORT/ERROR_TOO_LONG
  // 4. ERROR_INVALID_VERSION
  // 5. ERROR_INVALID_VARIANT
  // Position of the next expected hyphen
  $h = self::STRICT_FIRST_HYPHEN_POSITION;
  for ($i = 0; $i < self::STRICT_LENGTH; ++$i) {

    // Check length
    if (!isset($value[$i])) {
      $this
        ->buildViolation($constraint->message)
        ->setParameter('{{ value }}', $this
        ->formatValue($value))
        ->setCode(Uuid::TOO_SHORT_ERROR)
        ->addViolation();
      return;
    }

    // Check hyphen placement
    // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
    //         ^    ^    ^    ^
    if ('-' === $value[$i]) {
      if ($i !== $h) {
        $this
          ->buildViolation($constraint->message)
          ->setParameter('{{ value }}', $this
          ->formatValue($value))
          ->setCode(Uuid::INVALID_HYPHEN_PLACEMENT_ERROR)
          ->addViolation();
        return;
      }

      // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
      //                        ^
      if ($h < self::STRICT_LAST_HYPHEN_POSITION) {
        $h += 5;
      }
      continue;
    }

    // Check characters
    if (!ctype_xdigit($value[$i])) {
      $this
        ->buildViolation($constraint->message)
        ->setParameter('{{ value }}', $this
        ->formatValue($value))
        ->setCode(Uuid::INVALID_CHARACTERS_ERROR)
        ->addViolation();
      return;
    }

    // Missing hyphen
    if ($i === $h) {
      $this
        ->buildViolation($constraint->message)
        ->setParameter('{{ value }}', $this
        ->formatValue($value))
        ->setCode(Uuid::INVALID_HYPHEN_PLACEMENT_ERROR)
        ->addViolation();
      return;
    }
  }

  // Check length again
  if (isset($value[$i])) {
    $this
      ->buildViolation($constraint->message)
      ->setParameter('{{ value }}', $this
      ->formatValue($value))
      ->setCode(Uuid::TOO_LONG_ERROR)
      ->addViolation();
  }

  // Check version
  if (!in_array($value[self::STRICT_VERSION_POSITION], $constraint->versions)) {
    $this
      ->buildViolation($constraint->message)
      ->setParameter('{{ value }}', $this
      ->formatValue($value))
      ->setCode(Uuid::INVALID_VERSION_ERROR)
      ->addViolation();
  }

  // Check variant - first two bits must equal "10"
  //   0b10xx
  // & 0b1100 (12)
  // = 0b1000 (8)
  if ((hexdec($value[self::STRICT_VARIANT_POSITION]) & 12) !== 8) {
    $this
      ->buildViolation($constraint->message)
      ->setParameter('{{ value }}', $this
      ->formatValue($value))
      ->setCode(Uuid::INVALID_VARIANT_ERROR)
      ->addViolation();
  }
}