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<?php
namespace YOOtheme\GraphQL\Type\Definition;
use YOOtheme\GraphQL\Error\Error;
use YOOtheme\GraphQL\Language\AST\IntValueNode;
use YOOtheme\GraphQL\Utils\Utils;
/**
* Class IntType
* @package GraphQL\Type\Definition
*/
class IntType extends ScalarType
{
// As per the GraphQL Spec, Integers are only treated as valid when a valid
// 32-bit signed integer, providing the broadest support across platforms.
//
// n.b. JavaScript's integers are safe between -(2^53 - 1) and 2^53 - 1 because
// they are internally represented as IEEE 754 doubles.
const MAX_INT = 2147483647;
const MIN_INT = -2147483648;
/**
* @var string
*/
public $name = Type::INT;
/**
* @var string
*/
public $description =
'The `Int` scalar type represents non-fractional signed whole numeric
values. Int can represent values between -(2^31) and 2^31 - 1. ';
/**
* @param mixed $value
* @return int|null
* @throws Error
*/
public function serialize($value)
{
return $this->coerceInt($value);
}
/**
* @param mixed $value
* @return int|null
* @throws Error
*/
public function parseValue($value)
{
return $this->coerceInt($value);
}
/**
* @param $valueNode
* @param array|null $variables
* @return int|null
* @throws \Exception
*/
public function parseLiteral($valueNode, array $variables = null)
{
if ($valueNode instanceof IntValueNode) {
$val = (int) $valueNode->value;
if ($valueNode->value === (string) $val && self::MIN_INT <= $val && $val <= self::MAX_INT) {
return $val;
}
}
// Intentionally without message, as all information already in wrapped Exception
throw new \Exception();
}
private function coerceInt($value) {
if ($value === '') {
throw new Error(
'Int cannot represent non 32-bit signed integer value: (empty string)'
);
}
$num = floatval($value);
if (!is_numeric($value) && !is_bool($value) || $num > self::MAX_INT || $num < self::MIN_INT) {
throw new Error(
'Int cannot represent non 32-bit signed integer value: ' .
Utils::printSafe($value)
);
}
$int = intval($num);
if ($int != $num) {
throw new Error(
'Int cannot represent non-integer value: ' .
Utils::printSafe($value)
);
}
return $int;
}
}