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Copy pathCallbackStream.php
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77 lines (62 loc) · 1.67 KB
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<?php
declare(strict_types=1);
namespace Docker\Stream;
use Psr\Http\Message\StreamInterface;
abstract class CallbackStream
{
protected $stream;
private $onNewFrameCallables = [];
private bool $stopped = false;
public function __construct(StreamInterface $stream)
{
$this->stream = $stream;
}
/**
* Called when there is a new frame from the stream.
*/
public function onFrame(callable $onNewFrame): void
{
$this->onNewFrameCallables[] = $onNewFrame;
}
/**
* Read a frame in the stream.
*/
abstract protected function readFrame();
/**
* Wait for stream to finish and call callables if defined.
*/
public function wait(): void
{
while (!$this->stopped && !$this->stream->eof()) {
$frame = $this->readFrame();
if (null !== $frame) {
if (!\is_array($frame)) {
$frame = [$frame];
}
foreach ($this->onNewFrameCallables as $newFrameCallable) {
\call_user_func_array($newFrameCallable, $frame);
}
}
}
}
/**
* Stop reading and close the response body.
*
* Called from a frame callback, wait() returns once the remaining callbacks
* for that frame have run. Closing a build or pull connection can cancel
* the daemon operation.
*/
public function stop(): void
{
if ($this->stopped) {
return;
}
$this->stopped = true;
$this->stream->close();
}
public function closeAndRead(): void
{
$this->stream->close();
$this->wait();
}
}