Chris@0: <?php
Chris@0: namespace GuzzleHttp\Psr7;
Chris@0: 
Chris@0: use Psr\Http\Message\StreamInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Lazily reads or writes to a file that is opened only after an IO operation
Chris@0:  * take place on the stream.
Chris@0:  */
Chris@0: class LazyOpenStream implements StreamInterface
Chris@0: {
Chris@0:     use StreamDecoratorTrait;
Chris@0: 
Chris@0:     /** @var string File to open */
Chris@0:     private $filename;
Chris@0: 
Chris@0:     /** @var string $mode */
Chris@0:     private $mode;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $filename File to lazily open
Chris@0:      * @param string $mode     fopen mode to use when opening the stream
Chris@0:      */
Chris@0:     public function __construct($filename, $mode)
Chris@0:     {
Chris@0:         $this->filename = $filename;
Chris@0:         $this->mode = $mode;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Creates the underlying stream lazily when required.
Chris@0:      *
Chris@0:      * @return StreamInterface
Chris@0:      */
Chris@0:     protected function createStream()
Chris@0:     {
Chris@0:         return stream_for(try_fopen($this->filename, $this->mode));
Chris@0:     }
Chris@0: }