<?php


use Zend\Mvc\ModuleRouteListener;
use Zend\Mvc\MvcEvent;

class Module
{
    public function onBootstrap(MvcEvent $e)
    {
        $app = $e->getApplication();
        $eventManager = $app->getEventManager();
        $moduleRouteListener = new ModuleRouteListener();
        $moduleRouteListener->attach($eventManager);

        // check for authentication on non white-listed routes
        $eventManager->attach(MvcEvent::EVENT_ROUTE, array($this, 'authPreDispatch'));
    }

    /**
     * Get the module's config
     *
     * @return  mixed The module config
     */
    public function getConfig()
    {
        $config = include __DIR__ . '/config/module.config.php';
        $routeLoader = new RouteLoader();
        return $routeLoader->registerRoutes($config);
    }

    public function getAutoloaderConfig()
    {
        return [
            'Zend\Loader\StandardAutoloader' => [
                'namespaces' => [
                    __NAMESPACE__ => __DIR__ . '/src/' . __NAMESPACE__,
                ],
            ],
        ];
    }

    /**
     * Authorisation, make sure users are logged in before allowing them to see anything
     *
     * @param MvcEvent $e
     * @return \Zend\Stdlib\ResponseInterface
     */
    public function authPreDispatch(MvcEvent $e)
    {
        $app = $e->getApplication();
        $serviceManager = $app->getServiceManager();
        $authService = $serviceManager->get('auth-service');

        // get the matched route name
        $match = $e->getRouteMatch();
        $routeName = $match->getMatchedRouteName();

        // the allowed routes, defined in global.php
        $config = $serviceManager->get("config");
        $whitelist = $config["whitelist"];

        if (!in_array($routeName, $whitelist) && !$authService->isLoggedIn()) {
            return $this->redirect($e, 'login');
        }
    }

    /**
     * @param MvcEvent $e
     * @param $url
     * @return \Zend\Stdlib\ResponseInterface
     * @author fawle
     */
    public function redirect(MvcEvent $e, $url)
    {
        $router = $e->getRouter();
        $request = $e->getRequest();
        $url = $router->assemble(array(), array('name' => $url));
        /** @var \Zend\Http\Response $response */
        $response = $e->getResponse();
        if ($request->isXmlHttpRequest()) {
            $response->setContent(json_encode(array('redirect' => $url)));
            $response->setStatusCode(401);
        } else {
            $response->getHeaders()->addHeaderLine('Location', $url);
            $response->setStatusCode(302);
        }
        return $response;
    }
}