Automattic\WooCommerce\Api\Infrastructure

ResolverHelpers::complexity_from_pagination │ public static │ WC 1.0

Compute the complexity cost of a paginated connection field.

Used as the complexity callable on every generated resolver field that returns a Connection. Runs during query validation (before resolver execution, so before PaginationParams::validate_args() has a chance to reject bad input) — so out-of-range / wrong-type values are clamped to MAX_PAGE_SIZE here. Using MAX_PAGE_SIZE as the fallback means a malicious attempt to shrink cost via e.g. a negative first value only inflates the computed complexity, closing the cost-bypass angle.

Method of the class: ResolverHelpers{}

No Hooks.

Returns

Int. The total complexity for this connection field.

Usage

$result = ResolverHelpers::complexity_from_pagination( $child_complexity, $args ): int;
$child_complexity(int) (required)
The complexity of a single child node.
$args(array) (required)
The field arguments (expects first / last).

ResolverHelpers::complexity_from_pagination() code WC 10.9.1

woocommerce/src/Api/Infrastructure/ResolverHelpers.php 
public static function complexity_from_pagination( int $child_complexity, array $args ): int {
	$requested = $args['first'] ?? $args['last'] ?? \Automattic\WooCommerce\Api\Pagination\PaginationParams::get_default_page_size();
	$page_size = ( is_int( $requested ) && $requested >= 0 && $requested <= \Automattic\WooCommerce\Api\Pagination\PaginationParams::MAX_PAGE_SIZE )
		? $requested
		: \Automattic\WooCommerce\Api\Pagination\PaginationParams::MAX_PAGE_SIZE;
	return $page_size * ( $child_complexity + 1 );
}