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<?php |
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declare(strict_types = 1); |
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namespace drupol\phpvfs\Importer; |
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use drupol\phptree\Importer\ImporterInterface; |
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use drupol\phptree\Node\AttributeNode; |
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use drupol\phptree\Node\NodeInterface; |
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/** |
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* Class Filesystem. |
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*/ |
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class Filesystem implements ImporterInterface |
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{ |
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/** |
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* Import data into a node. |
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* |
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* @param mixed $data |
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* The data to import |
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* |
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* @throws \Exception |
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* |
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* @return NodeInterface |
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* The new node |
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*/ |
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public function import($data): NodeInterface |
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{ |
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if (!\is_string($data)) { |
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throw new \Exception('Must be a string.'); |
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} |
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if (!\file_exists($data)) { |
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throw new \Exception('The directory doesn\'t exist.'); |
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} |
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return $this->arrayToTree($this->doImport($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 mixed $data |
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* The arguments |
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* |
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* @return \drupol\phptree\Node\NodeInterface |
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* The node |
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*/ |
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protected function createNode($data): NodeInterface |
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{ |
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if (\is_file($data)) { |
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return (new AttributeNode()) |
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->setAttribute('id', $data) |
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->setAttribute('label', $data); |
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} |
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if (\is_dir($data)) { |
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return (new AttributeNode()) |
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->setAttribute('label', $data) |
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->setAttribute('shape', 'rectangle'); |
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} |
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} |
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/** |
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* Convert an array into a tree. |
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* |
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* @param array $data |
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* |
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* @return \drupol\phptree\Node\NodeInterface |
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* The tree |
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*/ |
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private function arrayToTree(array $data): NodeInterface |
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{ |
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$data += [ |
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'children' => [], |
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]; |
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$node = $this->createNode($data['name']); |
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foreach ($data['children'] as $key => $child) { |
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$node->add($this->arrayToTree($child)); |
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} |
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return $node; |
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} |
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/** |
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* @param string $directory |
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* |
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* @return array |
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*/ |
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private function doImport(string $directory): array |
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{ |
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$return = [ |
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'name' => $directory, |
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'children' => [], |
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]; |
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if (false !== $items = \glob($directory . '/*')) { |
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foreach ($items as $item) { |
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$return['children'][] = $this->doImport($item); |
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} |
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} |
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return $return; |
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} |
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} |
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For hinted functions/methods where all return statements with the correct type are only reachable via conditions, ?null? gets implicitly returned which may be incompatible with the hinted type. Let?s take a look at an example: