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<?php |
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namespace Storeman\Index; |
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/** |
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* A node within the object index tree. |
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*/ |
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class IndexNode implements \Countable |
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{ |
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/** |
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* @var IndexObject |
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*/ |
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protected $indexObject; |
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/** |
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* @var IndexNode[] |
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*/ |
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protected $children = []; |
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/** |
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* @var IndexNode |
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*/ |
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protected $parent; |
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/** |
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* For the construction of a root node both arguments have to be null. |
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* For the construction of regular or leaf nodes both arguments have to be given. |
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* |
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* @param IndexObject $indexObject |
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* @param IndexNode $parent |
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*/ |
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public function __construct(IndexObject $indexObject = null, IndexNode $parent = null) |
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{ |
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assert(($indexObject === null) === ($parent === null)); |
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$this->indexObject = $indexObject; |
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$this->parent = $parent; |
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} |
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public function getIndexObject(): IndexObject |
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{ |
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return $this->indexObject; |
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} |
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public function setIndexObject(IndexObject $indexObject): IndexNode |
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{ |
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assert($this->indexObject->getRelativePath() === $indexObject->getRelativePath()); |
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$this->indexObject = $indexObject; |
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return $this; |
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} |
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/** |
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* Returns map from index object basename to child node. |
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* |
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* @return array |
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*/ |
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public function getChildren(): array |
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{ |
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return $this->children; |
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} |
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public function getParent(): ?IndexNode |
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{ |
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return $this->parent; |
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} |
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public function getChild(string $name): ?IndexNode |
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{ |
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return array_key_exists($name, $this->children) ? $this->children[$name] : null; |
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} |
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public function hasChild(string $name): bool |
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{ |
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return array_key_exists($name, $this->children); |
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} |
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public function addChild(IndexNode $indexNode): IndexNode |
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{ |
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assert($this->indexObject === null || $this->indexObject->isDirectory()); |
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assert($this->indexObject === null || strpos($indexNode->getIndexObject()->getRelativePath(), $this->indexObject->getRelativePath()) === 0); |
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$this->children[$indexNode->indexObject->getBasename()] = $indexNode; |
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// ensure lexicographical order |
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ksort($this->children); |
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return $this; |
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} |
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public function addChildren(array $children): IndexNode |
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{ |
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foreach ($children as $child) |
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{ |
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$this->addChild($child); |
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} |
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return $this; |
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} |
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public function getNodeByPath(string $path): ?IndexNode |
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{ |
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$current = $this; |
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foreach (explode('/', $path) as $pathPart) |
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{ |
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$current = $current->getChild($pathPart); |
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if ($current === null) |
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{ |
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break; |
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} |
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} |
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return $current; |
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} |
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/** |
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* Recursively counts all children and its children and returns total. |
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* |
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* @return int |
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*/ |
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public function recursiveCount() |
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{ |
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return count($this) + array_reduce($this->children, function(int $carry, IndexNode $node) { |
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return $carry + $node->recursiveCount(); |
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}, 0); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count() |
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{ |
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return count($this->children); |
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} |
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} |
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storeman-io /
storeman
