class RangeConstraintValidator

class RangeConstraintValidator extends ConstraintValidator {
  
  /**
   * {@inheritdoc}
   */
  public function validate($value, Constraint $constraint) {
    if (!$constraint instanceof Range) {
      throw new UnexpectedTypeException($constraint, __NAMESPACE__ . '\\Range');
    }
    if (NULL === $value) {
      return;
    }
    if (!is_numeric($value) && !$value instanceof \DateTimeInterface) {
      $this->context
        ->buildViolation($constraint->invalidMessage)
        ->setParameter('{{ value }}', $this->formatValue($value, self::PRETTY_DATE))
        ->setCode(Range::INVALID_CHARACTERS_ERROR)
        ->addViolation();
      return;
    }
    $min = $constraint->min;
    $max = $constraint->max;
    // Convert strings to DateTimes if comparing another DateTime.
    // This allows to compare with any date/time value supported by
    // the DateTime constructor.
    // @see http://php.net/manual/en/datetime.formats.php
    if ($value instanceof \DateTimeInterface) {
      if (\is_string($min)) {
        $min = new \DateTime($min);
      }
      if (\is_string($max)) {
        $max = new \DateTime($max);
      }
    }
    if (NULL !== $constraint->max && $value > $max) {
      $this->context
        ->buildViolation($constraint->maxMessage)
        ->setParameter('{{ value }}', $this->formatValue($value, self::PRETTY_DATE))
        ->setParameter('{{ limit }}', $this->formatValue($max, self::PRETTY_DATE))
        ->setCode(Range::TOO_HIGH_ERROR)
        ->addViolation();
      return;
    }
    if (NULL !== $constraint->min && $value < $min) {
      $this->context
        ->buildViolation($constraint->minMessage)
        ->setParameter('{{ value }}', $this->formatValue($value, self::PRETTY_DATE))
        ->setParameter('{{ limit }}', $this->formatValue($min, self::PRETTY_DATE))
        ->setCode(Range::TOO_LOW_ERROR)
        ->addViolation();
    }
  }

}