for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
<?php
declare(strict_types=1);
namespace Ecodev\Felix\Api\Scalar;
use Cake\Chronos\Chronos;
use DateTimeZone;
use GraphQL\Error\Error;
use GraphQL\Language\AST\Node;
use GraphQL\Language\AST\StringValueNode;
use GraphQL\Type\Definition\ScalarType;
use GraphQL\Utils\Utils;
final class ChronosType extends ScalarType
{
public ?string $description = 'A date with time and timezone.';
/**
* Serializes an internal value to include in a response.
*/
public function serialize(mixed $value): mixed
if ($value instanceof Chronos) {
return $value->format('c');
}
return $value;
* Parses an externally provided value (query variable) to use as an input.
public function parseValue(mixed $value): ?Chronos
if (!is_string($value)) {
throw new Error('Cannot represent value as Chronos date: ' . Utils::printSafe($value));
if ($value === '') {
return null;
$date = new Chronos($value);
$date = $date->setTimezone(new DateTimeZone(date_default_timezone_get()));
return $date;
* Parses an externally provided literal value to use as an input (e.g. in Query AST).
public function parseLiteral(Node $valueNode, ?array $variables = null): ?Chronos
// Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL
// error location in query:
if (!($valueNode instanceof StringValueNode)) {
throw new Error('Query error: Can only parse strings got: ' . $valueNode->kind, $valueNode);
return $this->parseValue($valueNode->value);
Ecodev /
felix
