<?php
/**
* This file is part of the PHP Generics package.
*
* @package Generics
*/
namespace Generics\Streams\Interceptor;
/**
* This class provides an caching stream interceptor
*
* @author Maik Greubel <greubel@nkey.de>
*/
class CachedStreamInterceptor extends AbstractStreamInterceptor
{
/**
*
* @var string
*/
private static $cache = "";
/**
* Create a new instance of CachedStreamInterceptor
*/
public function __construct()
{
stream_filter_register($this->getFilterName(), CachedStreamInterceptor::class);
}
/**
*
* {@inheritdoc}
* @see \Generics\Streams\Interceptor\StreamInterceptor::filter()
*/
public function filter($in, $out, int &$consumed, bool $closing): int
{
if ($closing) {
return PSFS_FEED_ME;
}
while ($bucket = stream_bucket_make_writeable($in)) {
self::$cache .= $bucket->data;
$consumed += $bucket->datalen;
stream_bucket_append($out, $bucket);
}
return PSFS_PASS_ON;
}
/**
* Retrieve the cache buffer
*
* @return string
*/
public function getCache(): string
{
return self::$cache;
}
/**
*
* {@inheritdoc}
* @see \Generics\Streams\Interceptor\StreamInterceptor::getFilterName()
*/
public function getFilterName(): string
{
return strtolower(CachedStreamInterceptor::class);
}
/**
*
* {@inheritdoc}
* @see \Generics\Streams\Interceptor\StreamInterceptor::reset()
*/
public function reset()
{
self::$cache = "";
}
}
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