GraphQL\Examples\Blog\Type\Field\HtmlField::build PHP Метод

    public static function build($name, $objectKey = null)
    {
        $objectKey = $objectKey ?: $name;
        // Demonstrates how to organize re-usable fields
        // Usual example: when the same field with same args shows up in different types
        // (for example when it is a part of some interface)
        return ['name' => $name, 'type' => Types::string(), 'args' => ['format' => ['type' => Types::contentFormatEnum(), 'defaultValue' => ContentFormatEnum::FORMAT_HTML], 'maxLength' => Types::int()], 'resolve' => function ($object, $args) use($objectKey) {
            $html = $object->{$objectKey};
            $text = strip_tags($html);
            if (!empty($args['maxLength'])) {
                $safeText = mb_substr($text, 0, $args['maxLength']);
            } else {
                $safeText = $text;
            }
            switch ($args['format']) {
                case ContentFormatEnum::FORMAT_HTML:
                    if ($safeText !== $text) {
                        // Text was truncated, so just show what's safe:
                        return nl2br($safeText);
                    } else {
                        return $html;
                    }
                case ContentFormatEnum::FORMAT_TEXT:
                default:
                    return $safeText;
            }
        }];
    }

 /**
  * @param $name
  * @param null $objectKey
  * @return array
  */
 public static function htmlField($name, $objectKey = null)
 {
     return HtmlField::build($name, $objectKey);
 }