class RouterDataCollector

class RouterDataCollector extends DataCollector {
    
    /**
     * @var \SplObjectStorage<Request, callable>
     */
    protected \SplObjectStorage $controllers;
    public function __construct() {
        $this->reset();
    }
    
    /**
     * @final
     */
    public function collect(Request $request, Response $response, ?\Throwable $exception = null) : void {
        if ($response instanceof RedirectResponse) {
            $this->data['redirect'] = true;
            $this->data['url'] = $response->getTargetUrl();
            if ($this->controllers
                ->contains($request)) {
                $this->data['route'] = $this->guessRoute($request, $this->controllers[$request]);
            }
        }
        unset($this->controllers[$request]);
    }
    public function reset() : void {
        $this->controllers = new \SplObjectStorage();
        $this->data = [
            'redirect' => false,
            'url' => null,
            'route' => null,
        ];
    }
    protected function guessRoute(Request $request, string|object|array $controller) : string {
        return 'n/a';
    }
    
    /**
     * Remembers the controller associated to each request.
     */
    public function onKernelController(ControllerEvent $event) : void {
        $this->controllers[$event->getRequest()] = $event->getController();
    }
    
    /**
     * @return bool Whether this request will result in a redirect
     */
    public function getRedirect() : bool {
        return $this->data['redirect'];
    }
    public function getTargetUrl() : ?string {
        return $this->data['url'];
    }
    public function getTargetRoute() : ?string {
        return $this->data['route'];
    }
    public function getName() : string {
        return 'router';
    }

}