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<?php |
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namespace arc\store; |
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final class TreeStore implements Store { |
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private $tree; |
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private $queryParser; |
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private $resultHandler; |
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private $path; |
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/** |
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* MemStore constructor. |
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* @param \arc\tree\Node $tree |
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* @param callable $queryParser |
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* @param callable $resultHandler |
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* @param string $path |
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*/ |
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public function __construct($tree = null, $queryParser = null, $resultHandler = null, $path = '/') |
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{ |
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$this->tree = $tree; |
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$this->queryParser = $queryParser; |
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$this->resultHandlerFactory = $resultHandler; |
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$this->resultHandler = $resultHandler($this->tree); |
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$this->path = \arc\path::collapse($path); |
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} |
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/** |
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* change the current path, returns a new store instance for that path |
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* @param string $path |
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* @return PSQLStore |
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*/ |
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public function cd($path) |
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{ |
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return new self( $this->tree, $this->queryParser, $this->resultHandlerFactory, \arc\path::collapse($path, $this->path) ); |
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} |
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/** |
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* creates sql query for the search query and returns the resulthandler |
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* @param string $query |
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* @param string $path |
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* @return mixed |
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*/ |
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public function find($query, $path='') |
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{ |
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$path = \arc\path::collapse($path, $this->path); |
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$root = $this->tree->cd($path); |
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$f = $this->queryParser->parse($query, $path); |
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return call_user_func($this->resultHandler, $f ); |
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} |
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/** |
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* get a single object from the store by path |
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* @param string $path |
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* @return mixed |
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*/ |
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public function get($path='') |
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{ |
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$path = \arc\path::collapse($path, $this->path); |
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$result = $this->tree->cd($path); |
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return $result; |
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} |
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/** |
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* list all parents, including self, by path, starting from the root |
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* @param string $path |
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* @param string $top |
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* @return mixed |
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*/ |
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public function parents($path='', $top='/') |
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{ |
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$path = \arc\path::collapse($path, $this->path); |
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return ($this->resultHandler)( |
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'strtolower($node->path)==strtolower(substring("' |
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.$path.'",1,'.sizeof($path) |
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.') && like(strtolower($node->path),strtolower("'.$top.'")' |
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); |
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} |
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/** |
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* list all child objects by path |
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* @param string $path |
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* @return mixed |
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*/ |
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public function ls($path='') |
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{ |
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$path = \arc\path::collapse($path, $this->path); |
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return $this->tree->cd($path)->ls(function($node) { |
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return json_decode(json_encode($node->nodeValue),false); |
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}); |
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} |
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/** |
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* returns true if an object with the given path exists |
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* @param string $path |
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* @return bool |
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*/ |
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public function exists($path='') |
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{ |
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$path = \arc\path::collapse($path, $this->path); |
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if ($path!='/') { |
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$parent = ($path=='/' ? '' : \arc\path::parent($path)); |
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$name = basename($path); |
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return $this->tree->cd($parent)->childNodes->offsetExists($name); |
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} |
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return true; |
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} |
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/** |
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* initialize the postgresql database, if it wasn't before |
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* @return bool|mixed |
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*/ |
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public function initialize() { |
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return $this->save(\arc\prototype::create([ |
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'name' => 'Root' |
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]),'/'); |
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} |
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/** |
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* save (insert or update) a single object on the given path |
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* @param $data |
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* @param string $path |
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* @return mixed |
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*/ |
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public function save($data, $path='') { |
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$path = \arc\path::collapse($path, $this->path); |
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$parent = ($path=='/' ? '' : \arc\path::parent($path)); |
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if ($path!='/' && !$this->exists($parent)) { |
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throw new \arc\IllegalRequest("Parent $parent not found.", \arc\exceptions::OBJECT_NOT_FOUND); |
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} |
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$parentNode = $this->tree->cd($parent); |
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$name = ($path=='/' ? '' : basename($path)); |
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if ($name) { |
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$parentNode->appendChild($name, $data); |
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} else { |
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$parentNode->nodeValue = $data; |
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} |
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return true; |
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} |
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/** |
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* remove the object with the given path and all its children |
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* won't remove the root object ever |
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* @param string $path |
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* @return mixed |
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*/ |
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public function delete($path = '') { |
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$path = \arc\path::collapse($path, $this->path); |
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$parent = \arc\path::parent($path); |
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$name = basename($path); |
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$this->tree->cd($parent)->removeChild($name); |
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return true; |
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} |
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public static function getResultHandler($tree) |
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{ |
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return function($callback) use ($tree) { |
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$dataset = \arc\tree::filter($tree, $callback); |
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foreach($dataset as $path => $node) { |
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$node = json_decode(json_encode($node),false); |
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$dataset[$path] = $node; |
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} |
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return $dataset; |
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}; |
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} |
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} |
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Ariadne-CMS /
arc-store
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