class FileValidator

FileValidatorTest.php in drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php

class FileValidator extends ConstraintValidator {

  /**
   * {@inheritDoc}
   */
  public function validate($value, Constraint $constraint) {
    if (null === $value || '' === $value) {
      return;
    }
    if ($value instanceof UploadedFile && !$value
      ->isValid()) {
      switch ($value
        ->getError()) {
        case UPLOAD_ERR_INI_SIZE:
          if ($constraint->maxSize) {
            if (ctype_digit((string) $constraint->maxSize)) {
              $maxSize = (int) $constraint->maxSize;
            }
            elseif (preg_match('/^\\d++k$/', $constraint->maxSize)) {
              $maxSize = $constraint->maxSize * 1024;
            }
            elseif (preg_match('/^\\d++M$/', $constraint->maxSize)) {
              $maxSize = $constraint->maxSize * 1048576;
            }
            else {
              throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum size', $constraint->maxSize));
            }
            $maxSize = min(UploadedFile::getMaxFilesize(), $maxSize);
          }
          else {
            $maxSize = UploadedFile::getMaxFilesize();
          }
          $this->context
            ->addViolation($constraint->uploadIniSizeErrorMessage, array(
            '{{ limit }}' => $maxSize,
            '{{ suffix }}' => 'bytes',
          ));
          return;
        case UPLOAD_ERR_FORM_SIZE:
          $this->context
            ->addViolation($constraint->uploadFormSizeErrorMessage);
          return;
        case UPLOAD_ERR_PARTIAL:
          $this->context
            ->addViolation($constraint->uploadPartialErrorMessage);
          return;
        case UPLOAD_ERR_NO_FILE:
          $this->context
            ->addViolation($constraint->uploadNoFileErrorMessage);
          return;
        case UPLOAD_ERR_NO_TMP_DIR:
          $this->context
            ->addViolation($constraint->uploadNoTmpDirErrorMessage);
          return;
        case UPLOAD_ERR_CANT_WRITE:
          $this->context
            ->addViolation($constraint->uploadCantWriteErrorMessage);
          return;
        case UPLOAD_ERR_EXTENSION:
          $this->context
            ->addViolation($constraint->uploadExtensionErrorMessage);
          return;
        default:
          $this->context
            ->addViolation($constraint->uploadErrorMessage);
          return;
      }
    }
    if (!is_scalar($value) && !$value instanceof FileObject && !(is_object($value) && method_exists($value, '__toString'))) {
      throw new UnexpectedTypeException($value, 'string');
    }
    $path = $value instanceof FileObject ? $value
      ->getPathname() : (string) $value;
    if (!is_file($path)) {
      $this->context
        ->addViolation($constraint->notFoundMessage, array(
        '{{ file }}' => $path,
      ));
      return;
    }
    if (!is_readable($path)) {
      $this->context
        ->addViolation($constraint->notReadableMessage, array(
        '{{ file }}' => $path,
      ));
      return;
    }
    if ($constraint->maxSize) {
      if (ctype_digit((string) $constraint->maxSize)) {
        $size = filesize($path);
        $limit = (int) $constraint->maxSize;
        $suffix = 'bytes';
      }
      elseif (preg_match('/^\\d++k$/', $constraint->maxSize)) {
        $size = round(filesize($path) / 1000, 2);
        $limit = (int) $constraint->maxSize;
        $suffix = 'kB';
      }
      elseif (preg_match('/^\\d++M$/', $constraint->maxSize)) {
        $size = round(filesize($path) / 1000000, 2);
        $limit = (int) $constraint->maxSize;
        $suffix = 'MB';
      }
      else {
        throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum size', $constraint->maxSize));
      }
      if ($size > $limit) {
        $this->context
          ->addViolation($constraint->maxSizeMessage, array(
          '{{ size }}' => $size,
          '{{ limit }}' => $limit,
          '{{ suffix }}' => $suffix,
          '{{ file }}' => $path,
        ));
        return;
      }
    }
    if ($constraint->mimeTypes) {
      if (!$value instanceof FileObject) {
        $value = new FileObject($value);
      }
      $mimeTypes = (array) $constraint->mimeTypes;
      $mime = $value
        ->getMimeType();
      $valid = false;
      foreach ($mimeTypes as $mimeType) {
        if ($mimeType === $mime) {
          $valid = true;
          break;
        }
        if ($discrete = strstr($mimeType, '/*', true)) {
          if (strstr($mime, '/', true) === $discrete) {
            $valid = true;
            break;
          }
        }
      }
      if (false === $valid) {
        $this->context
          ->addViolation($constraint->mimeTypesMessage, array(
          '{{ type }}' => '"' . $mime . '"',
          '{{ types }}' => '"' . implode('", "', $mimeTypes) . '"',
          '{{ file }}' => $path,
        ));
      }
    }
  }

}