1 files changed, 85 insertions, 0 deletions
diff --git a/src/Router/Router.php b/src/Router/Router.php
new file mode 100644
index 0000000..b167142
--- /dev/null
+++ b/src/Router/Router.php
@@ -0,0 +1,85 @@
+<?php
+
+namespace App\Router;
+
+use App\Errors\ErrorCode;
+use App\Errors\ErrorResponse;
+use App\Errors\Exception;
+use App\Singleton;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Exception\MethodNotAllowedException;
+use Symfony\Component\Routing\Exception\ResourceNotFoundException;
+use Symfony\Component\Routing\Loader\Configurator\RouteConfigurator;
+use Symfony\Component\Routing\Matcher\UrlMatcher;
+use Symfony\Component\Routing\RequestContext;
+use Symfony\Component\Routing\RouteCollection;
+
+class Router
+{
+  use Singleton;
+
+  private RouteCollection $routes;
+  private RouteConfigurator $configurator;
+
+  public function __construct()
+  {
+    $this->routes = new RouteCollection();
+    $this->configurator = new RouteConfigurator($this->routes, $this->routes);
+
+    $this->addRoutes();
+  }
+
+  /**
+   * match the current url against the routes.
+   * also add preflight CORS headers on OPTIONS requests.
+   */
+  public function run(): Response
+  {
+    $request = Request::createFromGlobals();
+
+    if ($request->isMethod("OPTIONS")) {
+      $response = new Response();
+      $response->headers->add([
+        "Access-Control-Allow-Origin" => "*",
+        "Access-Control-Allow-Methods" => "GET, POST, PUT, DELETE, OPTIONS, PATCH, HEAD",
+        "Access-Control-Allow-Headers" => "X-Requested-With, Content-Type, Authorization",
+      ]);
+
+      return $response;
+    }
+
+    $context = new RequestContext();
+    $context->fromRequest($request);
+
+    try {
+      $matcher = new UrlMatcher($this->routes, $context);
+      $match = $matcher->matchRequest($request);
+
+      $class = $match["_controller"][0];
+      $method = $match["_controller"][1];
+
+      return (new $class)->$method();
+    } catch (Exception $exception) {
+      return ErrorResponse::fromException($exception);
+    } catch (ResourceNotFoundException $exception) {
+      return new ErrorResponse(ErrorCode::NOT_FOUND, "404", Response::HTTP_NOT_FOUND);
+    } catch (MethodNotAllowedException $exception) {
+      return new ErrorResponse(ErrorCode::FORBIDDEN, "403", Response::HTTP_FORBIDDEN);
+    } catch (\Exception $exception) {
+      return new ErrorResponse(ErrorCode::UNKNOWN, "Unknown error occured", Response::HTTP_INTERNAL_SERVER_ERROR);
+    }
+  }
+
+  /**
+   * add routes from the routes file
+   */
+  private function addRoutes(): void
+  {
+    $routesClientServer = include_once(__DIR__ . "/routes_client_server.php");
+    $routesClientServer($this->configurator);
+
+    $routesServerServer = include_once(__DIR__ . "/routes_server_server.php");
+    $routesServerServer($this->configurator);
+  }
+}