<?php
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
/**
 * Lazily reads or writes to a file that is opened only after an IO operation
 * take place on the stream.
 *
 * @final
 */

class LazyOpenStream implements StreamInterface
{
    use StreamDecoratorTrait;
    /** @var string File to open */
    private $filename;
    /** @var string */
    private $mode;
    /**
     * @param string $filename File to lazily open
     * @param string $mode     fopen mode to use when opening the stream
     */
    public function __construct($filename, $mode)
    {
        $this->filename = $filename;
        $this->mode = $mode;
    }
    protected function createStream()
    {
        return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode));
    }
}