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ClosestOperation.php
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ClosestOperation.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\Eel\FlowQuery\FlowQuery;
use Neos\Eel\FlowQuery\FlowQueryException;
use Neos\Eel\FlowQuery\Operations\AbstractOperation;
/**
* "closest" operation working on ContentRepository nodes. For each node in the context,
* get the first node that matches the selector by testing the node itself and
* traversing up through its ancestors.
*/
class ClosestOperation extends AbstractOperation
{
/**
* {@inheritdoc}
*
* @var string
*/
protected static $shortName = 'closest';
/**
* {@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
* @throws FlowQueryException
* @throws \Neos\Eel\Exception
*/
public function evaluate(FlowQuery $flowQuery, array $arguments)
{
if (!isset($arguments[0]) || empty($arguments[0])) {
throw new FlowQueryException('closest() requires a filter argument', 1332492263);
}
$output = [];
foreach ($flowQuery->getContext() as $contextNode) {
$contextNodeQuery = new FlowQuery([$contextNode]);
$contextNodeQuery->pushOperation('first', []);
$contextNodeQuery->pushOperation('filter', $arguments);
$parentsQuery = new FlowQuery([$contextNode]);
$contextNodeQuery->pushOperation('add', [$parentsQuery->parents($arguments[0])->get()]);
foreach ($contextNodeQuery as $result) {
/* @var TraversableNodeInterface $result */
$output[(string)$result->getNodeAggregateIdentifier()] = $result;
}
}
$flowQuery->setContext(array_values($output));
}
}