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<?php
/**
* Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Licensed under the MIT license:
* http://opensource.org/licenses/MIT
*/
namespace Icewind\Streams;
/**
* A string-like object that automatically registers a stream wrapper when used and removes the stream wrapper when no longer used
*
* Can optionally pass context options to the stream wrapper
*/
class Path {
/**
* @var bool
*/
protected $registered = false;
/**
* @var string
*/
protected $protocol;
/**
* @var string
*/
protected $class;
/**
* @var array
*/
protected $contextOptions;
/**
* @param string $class
* @param array $contextOptions
*/
public function __construct($class, $contextOptions = array()) {
$this->class = $class;
$this->contextOptions = $contextOptions;
}
public function getProtocol() {
if (!$this->protocol) {
$this->protocol = 'auto' . uniqid();
}
return $this->protocol;
}
public function wrapPath($path) {
return $this->getProtocol() . '://' . $path;
}
protected function register() {
if (!$this->registered) {
$this->appendDefaultContent($this->contextOptions);
stream_wrapper_register($this->getProtocol(), $this->class);
$this->registered = true;
}
}
protected function unregister() {
stream_wrapper_unregister($this->getProtocol());
$this->unsetDefaultContent($this->getProtocol());
$this->registered = false;
}
/**
* Add values to the default stream context
*
* @param array $values
*/
protected function appendDefaultContent($values) {
if (!is_array(current($values))) {
$values = array($this->getProtocol() => $values);
}
$context = stream_context_get_default();
$defaults = stream_context_get_options($context);
foreach ($values as $key => $value) {
$defaults[$key] = $value;
}
stream_context_set_default($defaults);
}
/**
* Remove values from the default stream context
*
* @param string $key
*/
protected function unsetDefaultContent($key) {
$context = stream_context_get_default();
$defaults = stream_context_get_options($context);
unset($defaults[$key]);
stream_context_set_default($defaults);
}
public function __toString() {
$this->register();
return $this->protocol . '://';
}
public function __destruct() {
$this->unregister();
}
}