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<?php
declare(strict_types=1);
namespace ZipStream;
class DeflateStream extends Stream
{
protected $filter;
/**
* @var Option\File
*/
protected $options;
/**
* Rewind stream
*
* @return void
*/
public function rewind(): void
{
// deflate filter needs to be removed before rewind
if ($this->filter) {
$this->removeDeflateFilter();
$this->seek(0);
$this->addDeflateFilter($this->options);
} else {
rewind($this->stream);
}
}
/**
* Remove the deflate filter
*
* @return void
*/
public function removeDeflateFilter(): void
{
if (!$this->filter) {
return;
}
stream_filter_remove($this->filter);
$this->filter = null;
}
/**
* Add a deflate filter
*
* @param Option\File $options
* @return void
*/
public function addDeflateFilter(Option\File $options): void
{
$this->options = $options;
// parameter 4 for stream_filter_append expects array
// so we convert the option object in an array
$optionsArr = [
'comment' => $options->getComment(),
'method' => $options->getMethod(),
'deflateLevel' => $options->getDeflateLevel(),
'time' => $options->getTime()
];
$this->filter = stream_filter_append(
$this->stream,
'zlib.deflate',
STREAM_FILTER_READ,
$optionsArr
);
}
}