/**
* Given a type and any value, return a runtime value coerced to match the type.
*/
private static function coerceValue(Type $type, $value)
{
if ($type instanceof NonNull) {
// Note: we're not checking that the result of coerceValue is non-null.
// We only call this function after calling isValidValue.
return self::coerceValue($type->getWrappedType(), $value);
}
if (null === $value) {
return null;
}
if ($type instanceof ListOfType) {
$itemType = $type->getWrappedType();
// TODO: support iterable input
if (is_array($value)) {
return array_map(function ($item) use($itemType) {
return Values::coerceValue($itemType, $item);
}, $value);
} else {
return [self::coerceValue($itemType, $value)];
}
}
if ($type instanceof InputObjectType) {
$fields = $type->getFields();
$obj = [];
foreach ($fields as $fieldName => $field) {
$fieldValue = self::coerceValue($field->getType(), $value[$fieldName]);
$obj[$fieldName] = $fieldValue === null ? $field->defaultValue : $fieldValue;
}
return $obj;
}
if ($type instanceof ScalarType || $type instanceof EnumType) {
$coerced = $type->coerce($value);
if (null !== $coerced) {
return $coerced;
}
}
return null;
}
