/**
* Returns the node with the given path, relative to this node. If the path
* does not exist, missing nodes will be created automatically.
* @param string $path The path to change to
* @return \arc\tree\NamedNode The target node corresponding with the given path.
*/
public function cd($path)
{
if (\arc\path::isAbsolute($path)) {
$node = $this->getRootNode();
} else {
$node = $this;
}
$result = \arc\path::reduce($path, function ($node, $name) {
switch ($name) {
case '..':
return isset($node->parentNode) ? $node->parentNode : $node;
break;
case '.':
case '':
return $node;
break;
default:
if (!isset($node->childNodes[$name])) {
return $node->appendChild($name);
} else {
return $node->childNodes[$name];
}
break;
}
}, $node);
return $result;
}
/**
* Returns the path without its root entry.
*
* Usage:
* $remainder = \arc\path::tail( '/root/of/a/path/' ); // => '/of/a/path/'
*
* @param string $path The path to get the tail of.
* @return string The path without its root entry.
*/
public static function tail($path)
{
if (!\arc\path::isAbsolute($path)) {
$path = '/' . $path;
}
return substr($path, strpos($path, '/', 1));
}
