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<?php
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
/**
* Stream decorator trait
* @property StreamInterface stream
*/
trait StreamDecoratorTrait
{
/**
* @param StreamInterface $stream Stream to decorate
*/
public function __construct(StreamInterface $stream)
{
$this->stream = $stream;
}
/**
* Magic method used to create a new stream if streams are not added in
* the constructor of a decorator (e.g., LazyOpenStream).
*
* @param string $name Name of the property (allows "stream" only).
*
* @return StreamInterface
*/
public function __get($name)
{
if ($name == 'stream') {
$this->stream = $this->createStream();
return $this->stream;
}
throw new \UnexpectedValueException("$name not found on class");
}
public function __toString()
{
try {
if ($this->isSeekable()) {
$this->seek(0);
}
return $this->getContents();
} catch (\Exception $e) {
// Really, PHP? https://bugs.php.net/bug.php?id=53648
trigger_error('StreamDecorator::__toString exception: '
. (string) $e, E_USER_ERROR);
return '';
}
}
public function getContents()
{
return copy_to_string($this);
}
/**
* Allow decorators to implement custom methods
*
* @param string $method Missing method name
* @param array $args Method arguments
*
* @return mixed
*/
public function __call($method, array $args)
{
$result = call_user_func_array([$this->stream, $method], $args);
// Always return the wrapped object if the result is a return $this
return $result === $this->stream ? $this : $result;
}
public function close()
{
$this->stream->close();
}
public function getMetadata($key = null)
{
return $this->stream->getMetadata($key);
}
public function detach()
{
return $this->stream->detach();
}
public function getSize()
{
return $this->stream->getSize();
}
public function eof()
{
return $this->stream->eof();
}
public function tell()
{
return $this->stream->tell();
}
public function isReadable()
{
return $this->stream->isReadable();
}
public function isWritable()
{
return $this->stream->isWritable();
}
public function isSeekable()
{
return $this->stream->isSeekable();
}
public function rewind()
{
$this->seek(0);
}
public function seek($offset, $whence = SEEK_SET)
{
$this->stream->seek($offset, $whence);
}
public function read($length)
{
return $this->stream->read($length);
}
public function write($string)
{
return $this->stream->write($string);
}
/**
* Implement in subclasses to dynamically create streams when requested.
*
* @return StreamInterface
* @throws \BadMethodCallException
*/
protected function createStream()
{
throw new \BadMethodCallException('Not implemented');
}
}
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