Digia\GraphQL\Util\NameHelper

Complexity

Total Complexity

7

Size/Duplication

Total Lines	27
Duplicated Lines	0 %

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
B	isValidError()	0	17	7

<?php

namespace Digia\GraphQL\Util;

use Digia\GraphQL\Error\ValidationException;
use Digia\GraphQL\Language\Node\NodeInterface;

class NameHelper
{

    /**
     * Returns an Error if a name is invalid.
     *
     * @param string     $name
     * @param mixed|null $node
     * @return ValidationException
     */
    public static function isValidError(string $name, $node = null): ?ValidationException
    {
        if (\strlen($name) > 1 && $name{0} === '_' && $name{1} === '_') {
            return new ValidationException(
                sprintf('Name "%s" must not begin with "__", which is reserved by GraphQL introspection.', $name),
                $node instanceof NodeInterface ? [$node] : null
            );
        }

        if (preg_match("/^[_a-zA-Z][_a-zA-Z0-9]*$/", $name) === 0) {
            return new ValidationException(
                sprintf('Names must match /^[_a-zA-Z][_a-zA-Z0-9]*$/ but "%s" does not.', $name),
                $node instanceof NodeInterface ? [$node] : null
            );
        }

        return null;
    }
}