/
ParentOperation.php
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/
ParentOperation.php
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<?php
namespace Neos\ContentRepository\Eel\FlowQueryOperations;
/*
* This file is part of the Neos.ContentRepository package.
*
* (c) Contributors of the Neos Project - www.neos.io
*
* This package is Open Source Software. For the full copyright and license
* information, please view the LICENSE file which was distributed with this
* source code.
*/
use Neos\ContentRepository\Domain\Projection\Content\TraversableNodeInterface;
use Neos\ContentRepository\Exception\NodeException;
use Neos\Eel\FlowQuery\FlowQuery;
use Neos\Eel\FlowQuery\Operations\AbstractOperation;
/**
* "parent" operation working on ContentRepository nodes. It iterates over all
* context elements and returns each direct parent nodes or only those matching
* the filter expression specified as optional argument.
*/
class ParentOperation extends AbstractOperation
{
/**
* {@inheritdoc}
*
* @var string
*/
protected static $shortName = 'parent';
/**
* {@inheritdoc}
*
* @var integer
*/
protected static $priority = 100;
/**
* {@inheritdoc}
*
* @param array $context $context onto which this operation should be applied (array or array-like object)
* @return boolean true if the operation can be applied onto the $context, false otherwise
*/
public function canEvaluate($context)
{
return count($context) === 0 || (isset($context[0]) && ($context[0] instanceof TraversableNodeInterface));
}
/**
* {@inheritdoc}
*
* @param FlowQuery $flowQuery the FlowQuery object
* @param array $arguments the arguments for this operation
* @return void
*/
public function evaluate(FlowQuery $flowQuery, array $arguments)
{
$output = [];
$outputNodeAggregateIdentifiers = [];
foreach ($flowQuery->getContext() as $contextNode) {
/* @var $contextNode TraversableNodeInterface */
try {
$parentNode = $contextNode->findParentNode();
} catch (NodeException $e) {
continue;
}
if (!isset($outputNodeAggregateIdentifiers[(string)$parentNode->getNodeAggregateIdentifier()])) {
$output[] = $parentNode;
$outputNodeAggregateIdentifiers[(string)$parentNode->getNodeAggregateIdentifier()] = true;
}
}
$flowQuery->setContext($output);
if (isset($arguments[0]) && !empty($arguments[0])) {
$flowQuery->pushOperation('filter', $arguments);
}
}
}