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<?php |
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namespace tomzx\AbstractParser; |
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class NodeTraverser implements NodeTraverserInterface |
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{ |
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/** |
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* @var \tomzx\AbstractParser\NodeVisitorInterface[] |
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*/ |
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protected $visitors = []; |
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/** |
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* @param \tomzx\AbstractParser\NodeVisitorInterface $visitor |
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* @return void |
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*/ |
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public function addVisitor(NodeVisitorInterface $visitor) |
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{ |
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$this->visitors[] = $visitor; |
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} |
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/** |
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* @param \tomzx\AbstractParser\NodeVisitorInterface $visitor |
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* @return void |
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*/ |
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public function removeVisitor(NodeVisitorInterface $visitor) |
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{ |
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foreach ($this->visitors as $index => $storedVisitor) { |
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if ($storedVisitor === $visitor) { |
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unset($this->visitors[$index]); |
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return; |
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} |
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} |
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} |
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/** |
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* @param array $nodes |
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* @return array |
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*/ |
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public function traverse(array $nodes) |
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{ |
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View Code Duplication |
foreach ($this->visitors as $visitor) { |
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if (($return = $visitor->beforeTraverse($nodes)) !== null) { |
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$nodes = $return; |
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} |
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} |
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$nodes = $this->traverseArray($nodes); |
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View Code Duplication |
foreach ($this->visitors as $visitor) { |
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if (($return = $visitor->afterTraverse($nodes)) !== null) { |
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$nodes = $return; |
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} |
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} |
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return $nodes; |
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} |
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/** |
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* @param array $nodes |
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* @return array |
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*/ |
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protected function traverseArray(array &$nodes) |
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{ |
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$replaceNodes = []; |
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foreach ($nodes as $index => &$node) { |
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if (is_array($node)) { |
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$node = $this->traverseArray($node); |
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} elseif ($node instanceof NodeInterface) { |
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$traverseChildren = true; |
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foreach ($this->visitors as $visitor) { |
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$return = $visitor->enterNode($node); |
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if (self::DONT_TRAVERSE_CHILDREN === $return) { |
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$traverseChildren = false; |
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} elseif ($return !== null) { |
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$node = $return; |
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} |
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} |
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if ($traverseChildren) { |
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$this->traverseArray($node->getChildren()); |
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} |
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foreach ($this->visitors as $visitor) { |
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$return = $visitor->exitNode($node); |
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if (self::REMOVE_NODE === $return) { |
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$replaceNodes[] = [$index, []]; |
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break; |
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} elseif (is_array($return)) { |
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$replaceNodes[] = [$index, $return]; |
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} elseif ($return !== null) { |
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$node = $return; |
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} |
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} |
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} |
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} |
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if ( ! empty($replaceNodes)) { |
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while (list($index, $replace) = array_pop($replaceNodes)) { |
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array_splice($nodes, $index, 1, $replace); |
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} |
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} |
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return $nodes; |
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} |
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} |
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tomzx /
abstract-parser
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.