| 1 |
<?php |
| 2 |
|
| 3 |
declare(strict_types=1); |
| 4 |
|
| 5 |
namespace Depicter\GuzzleHttp\Psr7; |
| 6 |
|
| 7 |
use Depicter\Psr\Http\Message\StreamInterface; |
| 8 |
|
| 9 |
/** |
| 10 |
* Lazily reads or writes to a file that is opened only after an IO operation |
| 11 |
* take place on the stream. |
| 12 |
*/ |
| 13 |
final class LazyOpenStream implements StreamInterface |
| 14 |
{ |
| 15 |
use StreamDecoratorTrait; |
| 16 |
|
| 17 |
/** @var string */ |
| 18 |
private $filename; |
| 19 |
|
| 20 |
/** @var string */ |
| 21 |
private $mode; |
| 22 |
|
| 23 |
/** |
| 24 |
* @var StreamInterface |
| 25 |
*/ |
| 26 |
private $stream; |
| 27 |
|
| 28 |
/** |
| 29 |
* @param string $filename File to lazily open |
| 30 |
* @param string $mode fopen mode to use when opening the stream |
| 31 |
*/ |
| 32 |
public function __construct(string $filename, string $mode) |
| 33 |
{ |
| 34 |
$this->filename = $filename; |
| 35 |
$this->mode = $mode; |
| 36 |
|
| 37 |
// unsetting the property forces the first access to go through |
| 38 |
// __get(). |
| 39 |
unset($this->stream); |
| 40 |
} |
| 41 |
|
| 42 |
/** |
| 43 |
* Creates the underlying stream lazily when required. |
| 44 |
*/ |
| 45 |
protected function createStream(): StreamInterface |
| 46 |
{ |
| 47 |
return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode)); |
| 48 |
} |
| 49 |
} |
| 50 |
|
