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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Base |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Base\Tree; |
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/** |
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* Tree |
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* |
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* @package Phoole\Base |
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*/ |
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class Tree implements TreeInterface |
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{ |
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/** |
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* the tree |
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* |
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* @var array |
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*/ |
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protected $tree; |
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/** |
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* construct a tree with/without default data |
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* |
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* @param array $data |
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*/ |
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public function __construct(array $data = []) |
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{ |
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$this->tree = $data ? $this->fixData($data) : []; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function &get(string $node) |
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{ |
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if ('' === $node) { |
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$result = &$this->tree; |
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} else { |
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$result = &$this->searchNode($node, $this->tree); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function has(string $node): bool |
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{ |
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if ('' === $node) { |
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return !empty($this->tree); |
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} else { |
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return $this->searchNode($node, $this->tree) !== NULL; |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function add(string $node, $data): TreeInterface |
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{ |
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// get the node, create it if not exists |
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$n = &$this->searchNode($node, $this->tree, TRUE); |
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// fix data |
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if (is_array($data)) { |
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$data = $this->fixData($data); |
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} |
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// merge |
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if (is_array($n) && is_array($data)) { |
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$n = array_replace_recursive($n, $data); |
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} else { |
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$n = $data; |
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} |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function delete(string $node): TreeInterface |
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{ |
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if ('' === $node) { |
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$this->tree = []; |
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} elseif ($this->has($node)) { |
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$par = &$this->parentNode($node); |
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$name = $this->getName($node); |
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unset($par[$name]); |
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} |
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return $this; |
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} |
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/** |
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* Get the parent node |
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* |
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* @param string $node |
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* @return array |
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*/ |
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protected function &parentNode(string $node): array |
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{ |
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$split = explode('.', $node); |
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array_pop($split); |
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$result = &$this->get(join('.', $split)); |
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return $result; |
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} |
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/** |
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* Get short name |
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* |
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* @param string $node |
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* @return string |
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*/ |
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protected function getName(string $node): string |
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{ |
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$split = explode('.', $node); |
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return array_pop($split); |
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} |
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/** |
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* Fix data, convert 'flat.name' to array node name |
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* |
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* @param array $data |
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* @return array |
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*/ |
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protected function fixData(array $data): array |
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{ |
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$result = []; |
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if (isset($data[0])) { |
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return $data; |
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} |
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foreach ($data as $k => $v) { |
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$res = &$this->searchNode($k, $result, TRUE); |
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if (is_array($v) && is_array($res)) { |
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$res = array_replace_recursive($res, $this->fixData($v)); |
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} else { |
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$res = $v; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Search a node in the $data, create on the fly |
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* |
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* @param string $path |
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* @param array &$data |
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* @param bool $create |
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* @return mixed null for not found |
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*/ |
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protected function &searchNode(string $path, array &$data, bool $create = FALSE) |
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{ |
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$found = &$data; |
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foreach (explode('.', $path) as $key) { |
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$found = &$this->childNode($key, $found, $create); |
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if (NULL === $found) { |
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break; |
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} |
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} |
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return $found; |
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} |
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/** |
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* get or create the next/child node, return NULL if not found |
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* |
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* @param string $key |
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* @param mixed &$data |
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* @param bool $create create the node if not exist |
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* @return mixed |
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*/ |
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protected function &childNode(string $key, &$data, bool $create) |
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{ |
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$null = NULL; |
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if (is_array($data)) { |
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if (isset($data[$key])) { |
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return $data[$key]; |
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} elseif ($create) { |
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$data[$key] = []; |
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return $data[$key]; |
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} |
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} |
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return $null; |
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} |
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} |
phoole /
base
