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<?php
/*
* This file is part of the ManageWP Worker plugin.
*
* (c) ManageWP LLC <contact@managewp.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
abstract class MWP_Stream_Decorator implements MWP_Stream_Interface
{
private $initialized = false;
/**
* @var MWP_Stream_Interface
*/
private $stream;
/**
* @param MWP_Stream_Interface|null $stream
*
* Note: Type hint removed from $stream parameter to fix PHP 8.4+ deprecation warning
* about implicitly nullable parameters while maintaining backward compatibility with PHP 5.5+.
* The nullable type syntax (?MWP_Stream_Interface) is not supported in PHP 5.5-7.0.
*/
public function __construct($stream = null)
{
$this->stream = $stream;
if ($this->stream) {
$this->initialized = true;
}
}
protected function getStream()
{
if (!$this->stream) {
$this->stream = $this->createStream();
}
return $this->stream;
}
protected function createStream()
{
return null;
}
/**
* Closes the stream and any underlying resources.
*/
public function close()
{
$this->getStream()->close();
}
/**
* Returns the current position of the file read/write pointer
*
* @return int|bool Returns the position of the file pointer or false on error
*/
public function tell()
{
return $this->getStream()->tell();
}
/**
* @return bool
*/
public function isSeekable()
{
return $this->getStream()->isSeekable();
}
/**
* @param int $offset
* @param int $whence
*
* @return bool
*/
public function seek($offset, $whence = SEEK_SET)
{
return $this->getStream()->seek($offset, $whence);
}
/**
* Returns true if the stream is at the end of the stream.
*
* @return bool
*/
public function eof()
{
return $this->getStream()->eof();
}
/**
* Read data from the stream
*
* @param int $length Read up to $length bytes from the object and return
* them. Fewer than $length bytes may be returned if
* underlying stream call returns fewer bytes.
*
* @return string Returns the data read from the stream.
*/
public function read($length)
{
return $this->getStream()->read($length);
}
}