<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

namespace PrestaShop\PrestaShop\Adapter\Security;

use PrestaShop\PrestaShop\Adapter\LegacyContext;
use PrestaShopBundle\Controller\Api\OAuth2\AccessTokenController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Security;
use Symfony\Component\Security\Core\User\UserProviderInterface;

/**
 * Admin Middleware security.
 */
class Admin
{
    /**
     * @var LegacyContext
     */
    private $context;

    /**
     * @var \Context
     */
    private $legacyContext;

    /**
     * @var TokenStorageInterface
     */
    private $securityTokenStorage;

    /**
     * @var UserProviderInterface
     */
    private $userProvider;

    /**
     * @var Security
     */
    private $security;

    public function __construct(
        LegacyContext $context,
        TokenStorageInterface $securityTokenStorage,
        UserProviderInterface $userProvider,
        Security $security
    ) {
        $this->context = $context;
        $this->legacyContext = $context->getContext();
        $this->securityTokenStorage = $securityTokenStorage;
        $this->userProvider = $userProvider;
        $this->security = $security;
    }

    /**
     * Check if employee is logged in
     * If not logged in, redirect to admin home page.
     *
     * @param RequestEvent $event
     *
     * @return bool or redirect
     */
    public function onKernelRequest(RequestEvent $event)
    {
        if (
            $this->security->getUser() !== null
            || $event->getRequest()->get('_controller') === AccessTokenController::class
        ) {
            return true;
        }

        //if employee loggdin in legacy context, authenticate him into sf2 security context
        if (isset($this->legacyContext->employee) && $this->legacyContext->employee->isLoggedBack()) {
            $user = $this->userProvider->loadUserByUsername($this->legacyContext->employee->email);
            $token = new UsernamePasswordToken($user, null, 'admin', $user->getRoles());
            $this->securityTokenStorage->setToken($token);

            return true;
        }

        // in case of exception handler sub request, avoid infinite redirection
        if ($event->getRequestType() === HttpKernelInterface::SUB_REQUEST
            && $event->getRequest()->attributes->has('exception')
        ) {
            return true;
        }

        //employee not logged in
        $event->stopPropagation();

        //if http request - add 403 error
        $request = Request::createFromGlobals();
        if ($request->isXmlHttpRequest()) {
            header('HTTP/1.1 403 Forbidden');
            exit();
        }

        //redirect to admin home page
        header('Location: ' . $this->context->getAdminLink('', false));
        exit();
    }
}
