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<?php |
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declare(strict_types=1); |
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namespace App\Middleware; |
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use App\Stream\Data\Converter; |
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use App\Stream\DataStream; |
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use App\Stream\GeneratorStream; |
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use App\Stream\Value\DataResponseProvider; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Message\StreamFactoryInterface; |
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use Psr\Http\Message\StreamInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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final class RenderDataStream implements MiddlewareInterface |
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{ |
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private array $converters = []; |
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private ContainerInterface $container; |
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private StreamFactoryInterface $streamFactory; |
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public function __construct(ContainerInterface $container, StreamFactoryInterface $streamFactory) |
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{ |
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$this->container = $container; |
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$this->streamFactory = $streamFactory; |
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} |
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public function defineConverter(string $className, string $format, string $mime = null, bool $deferred = false): self |
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{ |
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if (!is_subclass_of($className, Converter::class, true)) { |
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throw new \InvalidArgumentException('Converter class should implement ' . Converter::class); |
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} |
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$this->converters[$format] = [$className, $mime, $deferred]; |
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return $this; |
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} |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$response = $handler->handle($request); |
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$stream = $response->getBody(); |
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if (!$stream instanceof DataStream) { |
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return $response; |
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} |
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$data = $stream->getData(); |
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$format = $this->getRelevantFormat($data->getFormat(), $request); |
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[$className, $mime, $deferred] = $this->converters[$format]; |
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/** @var Converter $converter */ |
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$converter = $this->container->get($className); |
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$response = $response->withBody( |
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$deferred |
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? new GeneratorStream((fn() => yield $this->convertData($data, $converter))()) |
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: $this->convertData($data, $converter) |
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); |
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if ($mime !== null) { |
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$response = $response->withHeader('Content-Type', $mime); |
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} |
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if ($data->getCode() !== null) { |
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$response = $response->withStatus($data->getCode()); |
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} |
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return $this->addHeaders($response, $data->getHeaders()); |
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} |
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private function addHeaders(ResponseInterface $response, array $headers): ResponseInterface |
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{ |
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foreach ($headers as $header => $value) { |
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$response = $response->withHeader($header, $value); |
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} |
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return $response; |
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} |
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private function convertData(DataResponseProvider $data, Converter $converter): StreamInterface |
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{ |
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$result = $converter->convert($data->getData(), $data->getParams()); |
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return $this->streamFactory->createStream($result); |
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} |
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private function getRelevantFormat(?string $format, ServerRequestInterface $request): string |
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{ |
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if ($format !== null) { |
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if (!array_key_exists($format, $this->converters)) { |
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throw new \RuntimeException('Undefined format ' . $format); |
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} |
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return $format; |
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} |
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# todo: get type from header |
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return array_key_first($this->converters); |
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} |
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} |
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yiisoft /
yii-demo
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.