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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 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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/** |
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* Class Text. |
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*/ |
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final class Text implements ImporterInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function import($data): NodeInterface |
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{ |
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return $this->parseNode(new AttributeNode(['label' => 'root']), $data); |
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} |
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/** |
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* Create a node. |
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* |
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* @param string $label |
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* The node label |
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* |
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* @return AttributeNodeInterface |
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* The node |
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*/ |
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private function createNode(string $label): AttributeNodeInterface |
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{ |
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return new AttributeNode([ |
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'label' => $label, |
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]); |
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} |
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/** |
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* Parse a string into an array. |
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* |
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* @param string $subject |
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* The subject string |
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* |
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* @return array<string, mixed> |
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* The array |
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*/ |
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private function parse(string $subject): array |
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{ |
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$result = [ |
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'value' => mb_substr($subject, 1, mb_strpos($subject, '[', 1) - 1), |
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'children' => [], |
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]; |
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if (false === $nextBracket = mb_strpos($subject, '[', 1)) { |
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return $result; |
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} |
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// Todo: Improve the regex. |
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preg_match_all('#[^\[\]]+|\[(?<nested>(?R)*)]#', mb_substr($subject, $nextBracket, -1), $matches); |
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$result['children'] = array_map( |
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static function (string $match): string { |
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return sprintf('[%s]', $match); |
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}, |
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array_filter((array) $matches['nested']) |
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); |
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return $result; |
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} |
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/** |
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* @param AttributeNodeInterface $parent |
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* @param string ...$nodes |
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* |
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* @return \loophp\phptree\Node\NodeInterface |
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*/ |
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private function parseNode(AttributeNodeInterface $parent, string ...$nodes): NodeInterface |
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{ |
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return array_reduce( |
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$nodes, |
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function (AttributeNodeInterface $carry, string $node): NodeInterface { |
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$data = $this->parse($node); |
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return $carry |
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->add( |
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$this->parseNode( |
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$this->createNode($data['value']), |
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...$data['children'] |
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) |
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); |
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}, |
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$parent |
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); |
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} |
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} |
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loophp /
phptree
