EntryPoint.php

<?php
namespace Ninja;
class EntryPoint {

	private $route;
    private $method;
    private $routes;

	public function __construct(string $route, string $method, \Ninja\Routes $routes) {
		$this->route = $route;
        $this->method = $method;
        $this->routes = $routes;
		$this->checkUrl();
	}

	private function checkUrl() {
		if ($this->route !== strtolower($this->route)) {
			http_response_code(301);
			header('location: ' . strtolower($this->route));
		}
	}

	private function loadTemplate($templateFileName, $variables = []){
		extract($variables);
		ob_start();
		include __DIR__ . '/../../templates/' . $templateFileName;

		return ob_get_clean();
	}


	public function run() {
		$routes = $this->routes->getRoutes();
        //I added the line below as the code didn't work originally.
        $authentication = $this->routes->getAuthentication();
        //My addition: authentification object got

        if (isset($routes[$this->route]['login']) && // I think one of these is repeated. Delete one of these.
        !$authentication->isLoggedIn()) {
            header('location: /login/error');
        }
        else {
            $controller = $routes[$this->route]
            [$this->method]['controller'];
            $action = $routes[$this->route][$this->method]
            ['action'];
            $page = $controller->$action();
            $title = $page['title'];
            if (isset($page['variables'])) {
                $output = $this->loadTemplate($page['template'],
                $page['variables']);
            }
            else {
                $output = $this->loadTemplate($page['template']);
            }

            echo $this->loadTemplate('layout.html.php', ['loggedIn' => $authentication->isLoggedIn(),
            'output' => $output, 'title' => $title]);

        }
    }
}