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<?php
namespace YOOtheme\GraphQL\Type\Definition;
use YOOtheme\GraphQL\Error\Error;
use YOOtheme\GraphQL\Language\AST\IntValueNode;
use YOOtheme\GraphQL\Language\AST\Node;
use YOOtheme\GraphQL\Language\AST\StringValueNode;
use YOOtheme\GraphQL\Utils\Utils;
/**
* Class IDType
* @package GraphQL\Type\Definition
*/
class IDType extends ScalarType
{
/**
* @var string
*/
public $name = 'ID';
/**
* @var string
*/
public $description =
'The `ID` scalar type represents a unique identifier, often used to
refetch an object or as key for a cache. The ID type appears in a JSON
response as a String; however, it is not intended to be human-readable.
When expected as an input type, any string (such as `"4"`) or integer
(such as `4`) input value will be accepted as an ID.';
/**
* @param mixed $value
* @return string
* @throws Error
*/
public function serialize($value)
{
if ($value === true) {
return 'true';
}
if ($value === false) {
return 'false';
}
if ($value === null) {
return 'null';
}
if (!is_scalar($value) && (!is_object($value) || !method_exists($value, '__toString'))) {
throw new Error("ID type cannot represent non scalar value: " . Utils::printSafe($value));
}
return (string) $value;
}
/**
* @param mixed $value
* @return string
* @throws Error
*/
public function parseValue($value)
{
if (is_string($value) || is_int($value)) {
return (string) $value;
}
throw new Error("Cannot represent value as ID: " . Utils::printSafe($value));
}
/**
* @param Node $valueNode
* @param array|null $variables
* @return null|string
* @throws \Exception
*/
public function parseLiteral($valueNode, array $variables = null)
{
if ($valueNode instanceof StringValueNode || $valueNode instanceof IntValueNode) {
return $valueNode->value;
}
// Intentionally without message, as all information already in wrapped Exception
throw new \Exception();
}
}