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<?php |
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declare(strict_types=1); |
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namespace HttpSoft\Runner; |
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use HttpSoft\Runner\Exception\EmptyMiddlewarePipelineException; |
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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\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use function array_shift; |
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use function stripos; |
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use function trim; |
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final class MiddlewarePipeline implements MiddlewarePipelineInterface |
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{ |
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/** |
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* @var MiddlewareInterface[] |
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*/ |
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private array $pipeline = []; |
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/** |
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* {@inheritDoc} |
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* @psalm-suppress RiskyTruthyFalsyComparison |
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*/ |
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public function pipe(MiddlewareInterface $middleware, ?string $pathPrefix = null): void |
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{ |
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$this->pipeline[] = (!$pathPrefix || $pathPrefix === '/') ? $middleware : $this->path($pathPrefix, $middleware); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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return $this->process($request, new class implements RequestHandlerInterface { |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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throw EmptyMiddlewarePipelineException::create(MiddlewarePipeline::class); |
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} |
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}); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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return $this->next($handler)->handle($request); |
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} |
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/** |
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* @param RequestHandlerInterface $defaultHandler |
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* @return RequestHandlerInterface |
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*/ |
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private function next(RequestHandlerInterface $defaultHandler): RequestHandlerInterface |
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{ |
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return new class ($this->pipeline, $defaultHandler) implements RequestHandlerInterface { |
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private RequestHandlerInterface $handler; |
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/** @var MiddlewareInterface[] */ |
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private array $pipeline; |
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public function __construct(array $pipeline, RequestHandlerInterface $handler) |
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{ |
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$this->handler = $handler; |
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/** @var MiddlewareInterface[] $pipeline */ |
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$this->pipeline = $pipeline; |
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} |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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if (!$middleware = array_shift($this->pipeline)) { |
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return $this->handler->handle($request); |
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} |
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$next = clone $this; |
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$this->pipeline = []; |
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return $middleware->process($request, $next); |
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} |
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}; |
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} |
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/** |
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* @param string $prefix |
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* @param MiddlewareInterface $middleware |
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* @return MiddlewareInterface |
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*/ |
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private function path(string $prefix, MiddlewareInterface $middleware): MiddlewareInterface |
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{ |
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return new class ($prefix, $middleware) implements MiddlewareInterface { |
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private MiddlewareInterface $middleware; |
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private string $prefix; |
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public function __construct(string $prefix, MiddlewareInterface $middleware) |
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{ |
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$this->prefix = $this->normalize($prefix); |
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$this->middleware = $middleware; |
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} |
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public function process( |
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ServerRequestInterface $request, |
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RequestHandlerInterface $handler |
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): ResponseInterface { |
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$path = $this->normalize($request->getUri()->getPath()); |
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if ($this->prefix === '/' || stripos($path, $this->prefix) === 0) { |
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return $this->middleware->process($request, $handler); |
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} |
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return $handler->handle($request); |
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} |
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private function normalize(string $path): string |
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{ |
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$path = '/' . trim($path, '/'); |
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return ($path === '/') ? '/' : $path . '/'; |
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} |
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}; |
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} |
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} |
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httpsoft /
http-runner
