Automattic\WooCommerce\Vendor\GraphQL\Utils

AST::getOperationAST │ public static │ WC 1.0

Returns the operation within a document by name.

If a name is not provided, an operation is only returned if the document has exactly one.

Method of the class: AST{}

No Hooks.

Returns

null. Nothing (null).

Usage

$result = AST::getOperationAST( $document, ?string $operationName ): ?OperationDefinitionNode;
$document(DocumentNode) (required)
.
?string $operationName
.
Default: null

AST::getOperationAST() code WC 10.9.1

woocommerce/lib/packages/GraphQL/Utils/AST.php 
public static function getOperationAST(DocumentNode $document, ?string $operationName = null): ?OperationDefinitionNode
{
    $operation = null;
    foreach ($document->definitions->getIterator() as $node) {
        if (! $node instanceof OperationDefinitionNode) {
            continue;
        }

        if ($operationName === null) {
            // We found a second operation, so we bail instead of returning an ambiguous result.
            if ($operation !== null) {
                return null;
            }

            $operation = $node;
        } elseif ($node->name instanceof NameNode && $node->name->value === $operationName) {
            return $node;
        }
    }

    return $operation;
}