Automattic\WooCommerce\Vendor\GraphQL\Executor

ReferenceExecutor::collectFields │ protected │ WC 1.0

Given a selectionSet, adds all fields in that selection to the passed in map of fields, and returns it at the end.

CollectFields requires the "runtime type" of an object. For a field which returns an Interface or Union type, the "runtime type" will be the actual Object type returned by that field.

Method of the class: ReferenceExecutor{}

No Hooks.

Returns

null. Nothing (null).

Usage

// protected - for code of main (parent) or child class
$result = $this->collectFields( $runtimeType, $selectionSet, $fields, $visitedFragmentNames ): \ArrayObject;
$runtimeType(ObjectType) (required)
.
$selectionSet(SelectionSetNode) (required)
.
$fields(ArrayObject) (required)
.
$visitedFragmentNames(ArrayObject) (required)
.

ReferenceExecutor::collectFields() code WC 10.9.1

woocommerce/lib/packages/GraphQL/Executor/ReferenceExecutor.php 
protected function collectFields(
    ObjectType $runtimeType,
    SelectionSetNode $selectionSet,
    \ArrayObject $fields,
    \ArrayObject $visitedFragmentNames
): \ArrayObject {
    $exeContext = $this->exeContext;
    foreach ($selectionSet->selections as $selection) {
        switch (true) {
            case $selection instanceof FieldNode:
                if (! $this->shouldIncludeNode($selection)) {
                    break;
                }

                $name = static::getFieldEntryKey($selection);
                $fields[$name] ??= new \ArrayObject();
                $fields[$name][] = $selection;
                break;
            case $selection instanceof InlineFragmentNode:
                if (
                    ! $this->shouldIncludeNode($selection)
                    || ! $this->doesFragmentConditionMatch($selection, $runtimeType)
                ) {
                    break;
                }

                $this->collectFields(
                    $runtimeType,
                    $selection->selectionSet,
                    $fields,
                    $visitedFragmentNames
                );
                break;
            case $selection instanceof FragmentSpreadNode:
                $fragName = $selection->name->value;

                if (isset($visitedFragmentNames[$fragName]) || ! $this->shouldIncludeNode($selection)) {
                    break;
                }

                $visitedFragmentNames[$fragName] = true;

                if (! isset($exeContext->fragments[$fragName])) {
                    break;
                }

                $fragment = $exeContext->fragments[$fragName];
                if (! $this->doesFragmentConditionMatch($fragment, $runtimeType)) {
                    break;
                }

                $this->collectFields(
                    $runtimeType,
                    $fragment->selectionSet,
                    $fields,
                    $visitedFragmentNames
                );
                break;
        }
    }

    return $fields;
}