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<?php |
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declare(strict_types = 1); |
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namespace TheCodingMachine\GraphQL\Controllers\Types; |
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use DateTime; |
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use DateTimeImmutable; |
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use GraphQL\Error\InvariantViolation; |
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use GraphQL\Language\AST\Node; |
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use GraphQL\Language\AST\StringValueNode; |
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use GraphQL\Language\AST\ValueNode; |
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use GraphQL\Type\Definition\ScalarType; |
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use GraphQL\Utils\Utils; |
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class DateTimeType extends ScalarType |
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{ |
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private static $instance; |
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public static function getInstance(): self |
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{ |
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if (self::$instance === null) { |
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self::$instance = new self(); |
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} |
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return self::$instance; |
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} |
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/** |
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* @var string |
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*/ |
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public $name = 'DateTime'; |
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/** |
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* @var string |
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*/ |
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public $description = 'The `DateTime` scalar type represents time data, represented as an ISO-8601 encoded UTC date string.'; |
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/** |
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* @param mixed $value |
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*/ |
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public function serialize($value): string |
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{ |
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if (! $value instanceof DateTimeImmutable) { |
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throw new InvariantViolation('DateTime is not an instance of DateTimeImmutable: ' . Utils::printSafe($value)); |
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} |
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return $value->format(DateTime::ATOM); |
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} |
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/** |
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* @param mixed $value |
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*/ |
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public function parseValue($value): ?DateTimeImmutable |
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{ |
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return DateTimeImmutable::createFromFormat(DateTime::ATOM, $value) ?: null; |
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} |
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/** |
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* Parses an externally provided literal value (hardcoded in GraphQL query) to use as an input |
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* |
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* In the case of an invalid node or value this method must throw an Exception |
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* |
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* @param Node $valueNode |
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* @param array|null $variables |
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* @return mixed |
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* @throws \Exception |
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*/ |
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public function parseLiteral($valueNode, array $variables = null) |
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{ |
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if ($valueNode instanceof StringValueNode) { |
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return $valueNode->value; |
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} |
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return null; |
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} |
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} |
thecodingmachine /
graphql-controllers
