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<?php |
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namespace TheCodingMachine\GraphQLite\Types\AnyScalar; |
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use Exception; |
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use GraphQL\Error\Error; |
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use GraphQL\Language\AST\BooleanValueNode; |
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use GraphQL\Language\AST\FloatValueNode; |
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use GraphQL\Language\AST\IntValueNode; |
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use GraphQL\Language\AST\Node; |
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use GraphQL\Language\AST\StringValueNode; |
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use GraphQL\Type\Definition\ScalarType; |
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use GraphQL\Utils\Utils; |
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final class AnyScalarType extends ScalarType |
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{ |
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public const NAME = 'AnyScalar'; |
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/** |
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* @var self |
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*/ |
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private static $instance; |
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public function __construct() |
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{ |
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parent::__construct([ |
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'name' => 'AnyScalar', |
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'description' => 'A GraphQL type that can contain any scalar value (int, string, bool or float)' |
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]); |
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} |
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public static function getInstance(): self |
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{ |
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if (self::$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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* Serializes an internal value to include in a response. |
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* |
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* @param string $value |
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* @return string |
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*/ |
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public function serialize($value) |
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{ |
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return $value; |
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} |
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/** |
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* Parses an externally provided value (query variable) to use as an input |
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* |
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* @param mixed $value |
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* @return mixed |
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*/ |
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public function parseValue($value) |
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{ |
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if (!is_scalar($value)) { |
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throw new Error('Cannot represent following value as scalar: ' . Utils::printSafeJson($value)); |
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} |
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return $value; |
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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 mixed[]|null $variables |
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* |
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* @return mixed |
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* |
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* @throws Exception |
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*/ |
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public function parseLiteral($valueNode, ?array $variables = null) |
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{ |
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if ($valueNode instanceof StringValueNode || $valueNode instanceof BooleanValueNode) { |
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return $valueNode->value; |
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} |
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if ($valueNode instanceof IntValueNode) { |
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return (int) $valueNode->value; |
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} |
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if ($valueNode instanceof FloatValueNode) { |
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return (float) $valueNode->value; |
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} |
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throw new Error('Not a valid scalar', $valueNode); |
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} |
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} |
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thecodingmachine /
graphqlite-misc-types
