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<?php
declare(strict_types=1);
namespace Ecodev\Felix\Api\Scalar;
use Cake\Chronos\ChronosDate;
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 DateType extends ScalarType
{
public ?string $description = 'A date without time, nor timezone.';
/**
* Serializes an internal value to include in a response.
*/
public function serialize(mixed $value): mixed
if ($value instanceof ChronosDate) {
return $value->format('Y-m-d');
}
return $value;
* Parses an externally provided value (query variable) to use as an input.
public function parseValue(mixed $value): ChronosDate
if (!is_string($value)) {
throw new Error('Cannot represent value as Chronos date: ' . Utils::printSafe($value));
$date = ChronosDate::createFromFormat('Y-m-d+', $value);
return $date;
* Parses an externally provided literal value to use as an input (e.g. in Query AST).
public function parseLiteral(Node $valueNode, ?array $variables = null): ChronosDate
// Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL
// error location in query:
if (!($valueNode instanceof StringValueNode)) {
throw new Error('Query error: Can only parse strings got: ' . $valueNode->kind, $valueNode);
return $this->parseValue($valueNode->value);
Ecodev /
felix
