Automattic\WooCommerce\Vendor\GraphQL\Utils

TypeInfo::extractTypes │ public static │ WC 1.0

Given root type scans through all fields to find nested types.

Returns array where keys are for type name and value contains corresponding type instance.

Example output: [

'String' => $instanceOfStringType,
'MyType' => $instanceOfMyType,
...

]

Method of the class: TypeInfo{}

No Hooks.

Returns

null. Nothing (null).

Usage

$result = TypeInfo::extractTypes( $type, $typeMap ): void;
$type((Type&NamedType)|(Type&WrappingType)) (required)
.
$typeMap(array) (required)
.

TypeInfo::extractTypes() code WC 10.9.1

woocommerce/lib/packages/GraphQL/Utils/TypeInfo.php 
public static function extractTypes(Type $type, array &$typeMap): void
{
    if ($type instanceof WrappingType) {
        self::extractTypes($type->getInnermostType(), $typeMap);

        return;
    }

    $name = $type->name;
    assert(is_string($name));

    if (isset($typeMap[$name])) {
        if ($typeMap[$name] !== $type) {
            throw new InvariantViolation("Schema must contain unique named types but contains multiple types named \"{$type}\" (see https://webonyx.github.io/graphql-php/type-definitions/#type-registry).");
        }

        return;
    }

    $typeMap[$name] = $type;

    if ($type instanceof UnionType) {
        foreach ($type->getTypes() as $member) {
            self::extractTypes($member, $typeMap);
        }

        return;
    }

    if ($type instanceof InputObjectType) {
        foreach ($type->getFields() as $field) {
            $fieldType = $field->getType();
            assert($fieldType instanceof NamedType || $fieldType instanceof WrappingType);
            self::extractTypes($fieldType, $typeMap);
        }

        return;
    }

    if ($type instanceof ImplementingType) {
        foreach ($type->getInterfaces() as $interface) {
            self::extractTypes($interface, $typeMap);
        }
    }

    if ($type instanceof HasFieldsType) {
        foreach ($type->getFields() as $field) {
            foreach ($field->args as $arg) {
                $argType = $arg->getType();
                assert($argType instanceof NamedType || $argType instanceof WrappingType);
                self::extractTypes($argType, $typeMap);
            }

            $fieldType = $field->getType();
            assert($fieldType instanceof NamedType || $fieldType instanceof WrappingType);
            self::extractTypes($fieldType, $typeMap);
        }
    }
}