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<?php |
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namespace Digia\GraphQL\Language\AST\Visitor; |
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use Digia\GraphQL\Language\AST\Node\NodeInterface; |
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use Digia\GraphQL\Util\SerializationInterface; |
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class ParallelVisitor implements VisitorInterface |
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{ |
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/** |
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* @var array|VisitorInterface[] |
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*/ |
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protected $visitors; |
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/** |
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* @var array |
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*/ |
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protected $_skipping = []; |
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/** |
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* ParallelVisitor constructor. |
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* @param array|VisitorInterface[] $visitors |
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*/ |
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public function __construct($visitors) |
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{ |
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$this->visitors = $visitors; |
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} |
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/** |
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* @param NodeInterface|AcceptVisitorTrait $node |
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* @param string|int|null $key |
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* @param NodeInterface|null $parent |
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* @param array $path |
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* @return NodeInterface|SerializationInterface|null |
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* @throws VisitorBreak |
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*/ |
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public function enterNode( |
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NodeInterface $node, |
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$key = null, |
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?NodeInterface $parent = null, |
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array $path = [] |
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): ?NodeInterface { |
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$newNode = null; |
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foreach ($this->visitors as $i => $visitor) { |
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if (!isset($this->_skipping[$i])) { |
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try { |
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$newNode = $visitor->enterNode($node, $key, $parent, $path); |
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} catch (VisitorBreak $break) { |
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$this->_skipping[$i] = $break; |
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continue; |
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} |
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if (null === $newNode) { |
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$this->_skipping[$i] = $node; |
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$newNode = $node; |
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} |
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} |
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} |
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return $newNode; |
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} |
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/** |
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* @param NodeInterface|AcceptVisitorTrait $node |
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* @param string|int|null $key |
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* @param NodeInterface|null $parent |
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* @param array $path |
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* @return NodeInterface|SerializationInterface|null |
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* @throws VisitorBreak |
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*/ |
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public function leaveNode( |
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NodeInterface $node, |
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$key = null, |
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?NodeInterface $parent = null, |
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array $path = [] |
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): ?NodeInterface { |
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$newNode = null; |
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foreach ($this->visitors as $i => $visitor) { |
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if (!isset($this->_skipping[$i])) { |
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try { |
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$newNode = $visitor->leaveNode($node, $key, $parent, $path); |
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} catch (VisitorBreak $break) { |
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$this->_skipping[$i] = $break; |
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continue; |
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} |
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} elseif ($this->_skipping[$i] === $node) { |
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unset($this->_skipping[$i]); |
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} |
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} |
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return $newNode; |
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} |
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} |
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digiaonline /
graphql-php
