/** * {@inheritdoc} * * @param FlowQuery $flowQuery * @param array $arguments * @return void */ public function evaluate(FlowQuery $flowQuery, array $arguments) { $subject = $arguments[0]; if (!isset($subject) || empty($subject)) { $flowQuery->setContext(array()); return; } $filteredContext = array(); $context = $flowQuery->getContext(); if (is_string($subject)) { foreach ($context as $contextElement) { $contextElementQuery = new FlowQuery(array($contextElement)); $contextElementQuery->pushOperation('children', $arguments); if ($contextElementQuery->count() > 0) { $filteredContext[] = $contextElement; } } } else { if ($subject instanceof FlowQuery) { $elements = $subject->get(); } elseif ($subject instanceof \Traversable) { $elements = iterator_to_array($subject); } elseif (is_object($subject)) { $elements = array($subject); } elseif (is_array($subject)) { $elements = $subject; } else { throw new FizzleException('supplied argument for has operation not supported', 1332489625); } foreach ($elements as $element) { if ($element instanceof NodeInterface) { $parentsQuery = new FlowQuery(array($element)); /** @var NodeInterface $parent */ foreach ($parentsQuery->parents(array())->get() as $parent) { /** @var NodeInterface $contextElement */ foreach ($context as $contextElement) { if ($contextElement->getIdentifier() === $parent->getIdentifier()) { $filteredContext[] = $contextElement; } } } } } $filteredContext = array_unique($filteredContext); } $flowQuery->setContext($filteredContext); }