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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.
*/
class MWP_Stream_Stream implements MWP_Stream_Interface
{
/**
* @var resource
*/
private $stream;
/**
* @var bool
*/
private $seekable;
public function __construct($stream)
{
if (!is_resource($stream)) {
throw new InvalidArgumentException('Stream must be a resource');
}
$this->stream = $stream;
$meta = stream_get_meta_data($this->stream);
$this->seekable = $meta['seekable'];
}
/**
* Returns true if the stream is at the end of the stream.
*
* @return bool
*/
public function eof()
{
return !$this->stream || feof($this->stream);
}
/**
* 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 fread($this->stream, $length);
}
public static function factory($resource)
{
$type = gettype($resource);
if ($type == 'string') {
$stream = fopen('php://temp', 'r+');
if ($resource !== '') {
fwrite($stream, $resource);
fseek($stream, 0);
}
return new self($stream);
}
if ($type == 'resource') {
return new self($resource);
}
if ($resource instanceof MWP_Stream_Interface) {
return $resource;
}
throw new InvalidArgumentException('Invalid resource type: '.$type);
}
/**
* {@inheritdoc}
*/
public function isSeekable()
{
return $this->seekable;
}
/**
* {@inheritdoc}
*/
public function seek($offset, $whence = SEEK_SET)
{
return $this->seekable
? fseek($this->stream, $offset, $whence) === 0
: false;
}
/**
* {@inheritdoc}
*/
public function close()
{
if ($this->stream !== null) {
fclose($this->stream);
$this->stream = null;
}
}
/**
* {@inheritdoc}
*/
public function tell()
{
return $this->stream !== null ? ftell($this->stream) : false;
}
public function __toString()
{
$buffer = '';
while (!$this->eof()) {
$buffer .= $this->read(1048576);
}
return $buffer;
}
}