forked from friendica/friendica-addons
154 lines
3.8 KiB
PHP
154 lines
3.8 KiB
PHP
<?php
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/**
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* ObjectTree class
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*
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* This implementation of the Tree class makes use of the INode, IFile and ICollection API's
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_DAV_ObjectTree extends Sabre_DAV_Tree {
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/**
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* The root node
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*
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* @var Sabre_DAV_ICollection
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*/
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protected $rootNode;
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/**
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* This is the node cache. Accessed nodes are stored here
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*
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* @var array
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*/
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protected $cache = array();
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/**
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* Creates the object
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*
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* This method expects the rootObject to be passed as a parameter
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*
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* @param Sabre_DAV_ICollection $rootNode
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*/
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public function __construct(Sabre_DAV_ICollection $rootNode) {
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$this->rootNode = $rootNode;
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}
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/**
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* Returns the INode object for the requested path
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*
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* @param string $path
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* @return Sabre_DAV_INode
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*/
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public function getNodeForPath($path) {
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$path = trim($path,'/');
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if (isset($this->cache[$path])) return $this->cache[$path];
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//if (!$path || $path=='.') return $this->rootNode;
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$currentNode = $this->rootNode;
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// We're splitting up the path variable into folder/subfolder components and traverse to the correct node..
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foreach(explode('/',$path) as $pathPart) {
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// If this part of the path is just a dot, it actually means we can skip it
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if ($pathPart=='.' || $pathPart=='') continue;
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if (!($currentNode instanceof Sabre_DAV_ICollection))
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throw new Sabre_DAV_Exception_NotFound('Could not find node at path: ' . $path);
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$currentNode = $currentNode->getChild($pathPart);
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}
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$this->cache[$path] = $currentNode;
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return $currentNode;
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}
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/**
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* This function allows you to check if a node exists.
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*
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* @param string $path
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* @return bool
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*/
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public function nodeExists($path) {
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try {
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// The root always exists
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if ($path==='') return true;
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list($parent, $base) = Sabre_DAV_URLUtil::splitPath($path);
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$parentNode = $this->getNodeForPath($parent);
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if (!$parentNode instanceof Sabre_DAV_ICollection) return false;
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return $parentNode->childExists($base);
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} catch (Sabre_DAV_Exception_NotFound $e) {
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return false;
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}
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}
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/**
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* Returns a list of childnodes for a given path.
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*
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* @param string $path
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* @return array
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*/
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public function getChildren($path) {
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$node = $this->getNodeForPath($path);
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$children = $node->getChildren();
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foreach($children as $child) {
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$this->cache[trim($path,'/') . '/' . $child->getName()] = $child;
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}
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return $children;
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}
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/**
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* This method is called with every tree update
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*
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* Examples of tree updates are:
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* * node deletions
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* * node creations
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* * copy
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* * move
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* * renaming nodes
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*
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* If Tree classes implement a form of caching, this will allow
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* them to make sure caches will be expired.
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*
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* If a path is passed, it is assumed that the entire subtree is dirty
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*
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* @param string $path
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* @return void
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*/
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public function markDirty($path) {
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// We don't care enough about sub-paths
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// flushing the entire cache
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$path = trim($path,'/');
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foreach($this->cache as $nodePath=>$node) {
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if ($nodePath == $path || strpos($nodePath,$path.'/')===0)
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unset($this->cache[$nodePath]);
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}
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}
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}
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