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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;
/**
* Create a directory handle from an iterator or array
*
* The following options should be passed in the context when opening the stream
* [
* 'dir' => [
* 'array' => string[]
* 'iterator' => \Iterator
* ]
* ]
*
* Either 'array' or 'iterator' need to be set, if both are set, 'iterator' takes preference
*/
class IteratorDirectory implements Directory {
/**
* @var resource
*/
public $context;
/**
* @var \Iterator
*/
protected $iterator;
/**
* Load the source from the stream context and return the context options
*
* @param string $name
* @return array
* @throws \Exception
*/
protected function loadContext($name) {
$context = stream_context_get_options($this->context);
if (isset($context[$name])) {
$context = $context[$name];
} else {
throw new \BadMethodCallException('Invalid context, "' . $name . '" options not set');
}
if (isset($context['iterator'])) {
$this->iterator = $context['iterator'];
} else if (isset($context['array'])) {
$this->iterator = new \ArrayIterator($context['array']);
} else {
throw new \BadMethodCallException('Invalid context, iterator or array not set');
}
return $context;
}
/**
* @param string $path
* @param array $options
* @return bool
*/
public function dir_opendir($path, $options) {
$this->loadContext('dir');
return true;
}
/**
* @return string
*/
public function dir_readdir() {
if ($this->iterator->valid()) {
$result = $this->iterator->current();
$this->iterator->next();
return $result;
} else {
return false;
}
}
/**
* @return bool
*/
public function dir_closedir() {
return true;
}
/**
* @return bool
*/
public function dir_rewinddir() {
$this->iterator->rewind();
return true;
}
/**
* Creates a directory handle from the provided array or iterator
*
* @param \Iterator | array $source
* @return resource
*
* @throws \BadMethodCallException
*/
public static function wrap($source) {
if ($source instanceof \Iterator) {
$context = stream_context_create(array(
'dir' => array(
'iterator' => $source)
));
} else if (is_array($source)) {
$context = stream_context_create(array(
'dir' => array(
'array' => $source)
));
} else {
throw new \BadMethodCallException('$source should be an Iterator or array');
}
stream_wrapper_register('iterator', '\Icewind\Streams\IteratorDirectory');
$wrapped = opendir('iterator://', $context);
stream_wrapper_unregister('iterator');
return $wrapped;
}
}