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implementation/14-middleware/src/Http/RouteMiddleware.php

@@ -0,0 +1,69 @@
+<?php declare(strict_types=1);
+
+namespace Lubian\NoFramework\Http;
+
+use FastRoute\Dispatcher;
+use Lubian\NoFramework\Exception\InternalServerError;
+use Lubian\NoFramework\Exception\MethodNotAllowed;
+use Lubian\NoFramework\Exception\NotFound;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use Throwable;
+
+final class RouteMiddleware implements MiddlewareInterface
+{
+    public function __construct(
+        private readonly Dispatcher $dispatcher,
+        private readonly ResponseFactoryInterface $responseFactory,
+        private readonly string $routeAttributeName = '__route_handler',
+    ) {
+    }
+
+    private function decorateRequest(
+        ServerRequestInterface $request,
+    ): ServerRequestInterface {
+        $routeInfo = $this->dispatcher->dispatch(
+            $request->getMethod(),
+            $request->getUri()->getPath(),
+        );
+
+        if ($routeInfo[0] === Dispatcher::METHOD_NOT_ALLOWED) {
+            throw new MethodNotAllowed;
+        }
+
+        if ($routeInfo[0] === Dispatcher::FOUND) {
+            foreach ($routeInfo[2] as $attributeName => $attributeValue) {
+                $request = $request->withAttribute($attributeName, $attributeValue);
+            }
+            return $request->withAttribute(
+                $this->routeAttributeName,
+                $routeInfo[1]
+            );
+        }
+
+        throw new NotFound;
+    }
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        try {
+            $request = $this->decorateRequest($request);
+        } catch (NotFound) {
+            $response = $this->responseFactory->createResponse(404);
+            $response->getBody()->write('Not Found');
+            return $response;
+        } catch (MethodNotAllowed) {
+            return $this->responseFactory->createResponse(405);
+        } catch (Throwable $t) {
+            throw new InternalServerError($t->getMessage(), $t->getCode(), $t);
+        }
+
+        if ($handler instanceof RoutedRequestHandler) {
+            $handler->setRouteAttributeName($this->routeAttributeName);
+        }
+        return $handler->handle($request);
+    }
+}