1 files changed, 109 insertions, 0 deletions
diff --git a/src/Router.php b/src/Router.php
new file mode 100644
index 0000000..cda3006
--- /dev/null
+++ b/src/Router.php
@@ -0,0 +1,109 @@
+<?php
+
+namespace App;
+
+use App\Errors\ErrorResponse;
+use App\Errors\Exception;
+use App\Singleton;
+use App\Support\Logger;
+use Matrix\Enums\ErrorCode;
+use Symfony\Component\Config\FileLocator;
+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\AttributeClassLoader;
+use Symfony\Component\Routing\Loader\AttributeDirectoryLoader;
+use Symfony\Component\Routing\Matcher\UrlMatcher;
+use Symfony\Component\Routing\RequestContext;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCollection;
+
+class Router
+{
+  use Singleton;
+
+  private RouteCollection $routes;
+
+  public function __construct()
+  {
+    // load routes
+    $loader = new AttributeDirectoryLoader(new FileLocator(), new class() extends AttributeClassLoader {
+      protected function configureRoute(Route $route, \ReflectionClass $class, \ReflectionMethod $method, object $attr) {
+        $route->setDefault("_controller", [$class->getName(), $method->getName()]);
+      }
+    });
+
+    $this->routes = $loader->load(__DIR__ . "/Controllers");
+  }
+
+  /**
+   * match the current url against the routes.
+   * also add CORS headers.
+   */
+  public function run(): Response
+  {
+    $request = Request::createFromGlobals();
+
+    $response = new Response();
+    $corsHeaders = [
+      "Access-Control-Allow-Origin" => "*",
+      "Access-Control-Allow-Methods" => "GET, POST, PUT, DELETE, OPTIONS, PATCH, HEAD",
+      "Access-Control-Allow-Headers" => "X-Requested-With, Content-Type, Authorization",
+    ];
+
+    // handle OPTIONS
+    if ($request->isMethod("OPTIONS")) {
+      $response->headers->add($corsHeaders);
+
+      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];
+
+      $request->attributes->add(array_diff_key(
+        $match,
+        array_flip(["_controller", "_route"])
+      ));
+
+      Logger::logRequestToFile($request);
+
+      $response = (new $class)->$method($request);
+    } catch (Exception $exception) {
+      $response = ErrorResponse::fromException($exception);
+    } catch (ResourceNotFoundException $exception) {
+      $response = new ErrorResponse(ErrorCode::NOT_FOUND, "404", Response::HTTP_NOT_FOUND);
+    } catch (MethodNotAllowedException $exception) {
+      $response = new ErrorResponse(ErrorCode::FORBIDDEN, "403", Response::HTTP_FORBIDDEN);
+    } catch (\LogicException $exception) { // display logic exceptions normally
+      throw $exception;
+    } catch (\Exception $exception) {
+      $response = new ErrorResponse(
+        ErrorCode::UNKNOWN,
+        $exception->getMessage() ?: "Unknown error occured",
+        Response::HTTP_INTERNAL_SERVER_ERROR
+      );
+    } catch (\Error $error) {
+      error_log($error->getMessage() ?: "Unknown error occured");
+
+      $response = new ErrorResponse(
+        ErrorCode::UNKNOWN,
+        $error->getMessage() ?: "Unknown error occured",
+        Response::HTTP_INTERNAL_SERVER_ERROR
+      );
+    }
+
+    // add cors headers to all responses
+    $response->headers->add($corsHeaders);
+
+    return $response;
+  }
+}