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<?php
namespace YOOtheme\GraphQL\Type\Definition;
use YOOtheme\GraphQL\Error\Error;
use YOOtheme\GraphQL\Language\AST\FloatValueNode;
use YOOtheme\GraphQL\Language\AST\IntValueNode;
use YOOtheme\GraphQL\Utils\Utils;
/**
* Class FloatType
* @package GraphQL\Type\Definition
*/
class FloatType extends ScalarType
{
/**
* @var string
*/
public $name = Type::FLOAT;
/**
* @var string
*/
public $description =
'The `Float` scalar type represents signed double-precision fractional
values as specified by
[IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). ';
/**
* @param mixed $value
* @return float|null
* @throws Error
*/
public function serialize($value)
{
return $this->coerceFloat($value);
}
/**
* @param mixed $value
* @return float|null
* @throws Error
*/
public function parseValue($value)
{
return $this->coerceFloat($value);
}
/**
* @param $valueNode
* @param array|null $variables
* @return float|null
* @throws \Exception
*/
public function parseLiteral($valueNode, array $variables = null)
{
if ($valueNode instanceof FloatValueNode || $valueNode instanceof IntValueNode) {
return (float) $valueNode->value;
}
// Intentionally without message, as all information already in wrapped Exception
throw new \Exception();
}
private function coerceFloat($value) {
if ($value === '') {
throw new Error(
'Float cannot represent non numeric value: (empty string)'
);
}
if (!is_numeric($value) && $value !== true && $value !== false) {
throw new Error(
'Float cannot represent non numeric value: ' .
Utils::printSafe($value)
);
}
return (float) $value;
}
}