From a1bc763a16ee8be109de5c9053fbc5eded53824e Mon Sep 17 00:00:00 2001
From: Igor Scheller <igor.scheller@igorshp.de>
Date: Sat, 25 Aug 2018 21:16:20 +0200
Subject: Added nikic/fast-route as routing dispatcher

---
 src/Middleware/RouteDispatcher.php | 75 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 src/Middleware/RouteDispatcher.php

(limited to 'src/Middleware/RouteDispatcher.php')

diff --git a/src/Middleware/RouteDispatcher.php b/src/Middleware/RouteDispatcher.php
new file mode 100644
index 00000000..f14faea8
--- /dev/null
+++ b/src/Middleware/RouteDispatcher.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Engelsystem\Middleware;
+
+use FastRoute\Dispatcher as FastRouteDispatcher;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class RouteDispatcher implements MiddlewareInterface
+{
+    /** @var FastRouteDispatcher */
+    protected $dispatcher;
+
+    /** @var ResponseInterface */
+    protected $response;
+
+    /** @var MiddlewareInterface|null */
+    protected $notFound;
+
+    /**
+     * @param FastRouteDispatcher      $dispatcher
+     * @param ResponseInterface        $response Default response
+     * @param MiddlewareInterface|null $notFound Handles any requests if the route can't be found
+     */
+    public function __construct(
+        FastRouteDispatcher $dispatcher,
+        ResponseInterface $response,
+        MiddlewareInterface $notFound = null
+    ) {
+        $this->dispatcher = $dispatcher;
+        $this->response = $response;
+        $this->notFound = $notFound;
+    }
+
+    /**
+     * Process an incoming server request and return a response, optionally delegating
+     * response creation to a handler.
+     *
+     * @param ServerRequestInterface  $request
+     * @param RequestHandlerInterface $handler
+     * @return ResponseInterface
+     */
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $route = $this->dispatcher->dispatch($request->getMethod(), urldecode($request->getUri()->getPath()));
+
+        $status = $route[0];
+        if ($status == FastRouteDispatcher::NOT_FOUND) {
+            if ($this->notFound instanceof MiddlewareInterface) {
+                return $this->notFound->process($request, $handler);
+            }
+
+            return $this->response->withStatus(404);
+        }
+
+        if ($status == FastRouteDispatcher::METHOD_NOT_ALLOWED) {
+            $methods = $route[1];
+            return $this->response
+                ->withStatus(405)
+                ->withHeader('Allow', implode(', ', $methods));
+        }
+
+        $routeHandler = $route[1];
+        $request = $request->withAttribute('route-request-handler', $routeHandler);
+
+        $vars = $route[2];
+        foreach ($vars as $name => $value) {
+            $request = $request->withAttribute($name, $value);
+        }
+
+        return $handler->handle($request);
+    }
+}
-- 
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