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<?php |
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declare(strict_types=1); |
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namespace loophp\phptree\Importer; |
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use Exception; |
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use loophp\phptree\Node\AttributeNode; |
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use loophp\phptree\Node\AttributeNodeInterface; |
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use loophp\phptree\Node\NodeInterface; |
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use PhpParser\Node; |
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use SplObjectStorage; |
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use function is_array; |
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/** |
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* Class NikicPhpParser. |
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*/ |
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final class NikicPhpParser implements ImporterInterface |
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{ |
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/** |
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* @var SplObjectStorage |
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*/ |
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private $nodeMap; |
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public function __construct() |
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{ |
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$this->nodeMap = new SplObjectStorage(); |
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} |
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/** |
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* @param Node[] $data |
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* |
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* @throws Exception |
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* |
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* @return \loophp\phptree\Node\NodeInterface |
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*/ |
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public function import($data): NodeInterface |
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{ |
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return (new AttributeNode(['label' => 'root'])) |
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->add(...$this->parseNodes(...$data)); |
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} |
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/** |
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* @param \PhpParser\Node $astNode |
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* |
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* @throws \Exception |
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* |
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* @return \loophp\phptree\Node\NodeInterface |
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*/ |
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private function createNewNode(Node $astNode): NodeInterface |
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{ |
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$defaultAttributes = [ |
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'label' => $astNode->getType(), |
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'astNode' => $astNode, |
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]; |
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return (new AttributeNode($defaultAttributes)) |
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->add(...$this->parseNodes(...$this->getAllNodeChildren($astNode))); |
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} |
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/** |
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* @param \PhpParser\Node $astNode |
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* |
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* @return array<int, Node> |
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*/ |
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private function getAllNodeChildren(Node $astNode): array |
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{ |
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/** @var array<int, array<int, Node>> $astNodes */ |
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$astNodes = array_map( |
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static function (string $subNodeName) use ($astNode): array { |
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$subNodes = $astNode->{$subNodeName}; |
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if (!is_array($subNodes)) { |
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$subNodes = [$subNodes]; |
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} |
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return array_filter( |
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$subNodes, |
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'is_object' |
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); |
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}, |
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$astNode->getSubNodeNames() |
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); |
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return array_merge(...$astNodes); |
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} |
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/** |
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* @param \PhpParser\Node $astNode |
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* @param callable $default |
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* |
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* @return \loophp\phptree\Node\AttributeNodeInterface |
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*/ |
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private function getNodeFromCache(Node $astNode, callable $default): AttributeNodeInterface |
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{ |
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if (false === $this->nodeMap->contains($astNode)) { |
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$this->nodeMap->attach($astNode, $default($astNode)); |
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} |
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return $this->nodeMap->offsetGet($astNode); |
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} |
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/** |
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* @param Node ...$astNodes |
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* |
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* @throws \Exception |
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* |
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* @return AttributeNodeInterface[] |
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*/ |
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private function parseNodes(Node ...$astNodes): array |
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{ |
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$treeNodes = []; |
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foreach ($astNodes as $astNode) { |
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$treeNodes[] = $this->getNodeFromCache($astNode, [$this, 'createNewNode']); |
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} |
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return $treeNodes; |
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} |
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} |
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