<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Security\Guard;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationException;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Security\Guard\Token\GuardTokenInterface;
use Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface;

/**
 * The interface for all "guard" authenticators.
 *
 * The methods on this interface are called throughout the guard authentication
 * process to give you the power to control most parts of the process from
 * one location.
 *
 * @author Ryan Weaver <ryan@knpuniversity.com>
 *
 * @deprecated since version 3.4, to be removed in 4.0. Use AuthenticatorInterface instead
 */
interface GuardAuthenticatorInterface extends AuthenticationEntryPointInterface
{
    /**
     * Get the authentication credentials from the request and return them
     * as any type (e.g. an associate array). If you return null, authentication
     * will be skipped.
     *
     * Whatever value you return here will be passed to getUser() and checkCredentials()
     *
     * For example, for a form login, you might:
     *
     *      if ($request->request->has('_username')) {
     *          return array(
     *              'username' => $request->request->get('_username'),
     *              'password' => $request->request->get('_password'),
     *          );
     *      } else {
     *          return;
     *      }
     *
     * Or for an API token that's on a header, you might use:
     *
     *      return array('api_key' => $request->headers->get('X-API-TOKEN'));
     *
     * @param Request $request
     *
     * @return mixed|null
     */
    public function getCredentials(Request $request);

    /**
     * Return a UserInterface object based on the credentials.
     *
     * The *credentials* are the return value from getCredentials()
     *
     * You may throw an AuthenticationException if you wish. If you return
     * null, then a UsernameNotFoundException is thrown for you.
     *
     * @param mixed                 $credentials
     * @param UserProviderInterface $userProvider
     *
     * @throws AuthenticationException
     *
     * @return UserInterface|null
     */
    public function getUser($credentials, UserProviderInterface $userProvider);

    /**
     * Returns true if the credentials are valid.
     *
     * If any value other than true is returned, authentication will
     * fail. You may also throw an AuthenticationException if you wish
     * to cause authentication to fail.
     *
     * The *credentials* are the return value from getCredentials()
     *
     * @param mixed         $credentials
     * @param UserInterface $user
     *
     * @return bool
     *
     * @throws AuthenticationException
     */
    public function checkCredentials($credentials, UserInterface $user);

    /**
     * Create an authenticated token for the given user.
     *
     * If you don't care about which token class is used or don't really
     * understand what a "token" is, you can skip this method by extending
     * the AbstractGuardAuthenticator class from your authenticator.
     *
     * @see AbstractGuardAuthenticator
     *
     * @param UserInterface $user
     * @param string        $providerKey The provider (i.e. firewall) key
     *
     * @return GuardTokenInterface
     */
    public function createAuthenticatedToken(UserInterface $user, $providerKey);

    /**
     * Called when authentication executed, but failed (e.g. wrong username password).
     *
     * This should return the Response sent back to the user, like a
     * RedirectResponse to the login page or a 403 response.
     *
     * If you return null, the request will continue, but the user will
     * not be authenticated. This is probably not what you want to do.
     *
     * @param Request                 $request
     * @param AuthenticationException $exception
     *
     * @return Response|null
     */
    public function onAuthenticationFailure(Request $request, AuthenticationException $exception);

    /**
     * Called when authentication executed and was successful!
     *
     * This should return the Response sent back to the user, like a
     * RedirectResponse to the last page they visited.
     *
     * If you return null, the current request will continue, and the user
     * will be authenticated. This makes sense, for example, with an API.
     *
     * @param Request        $request
     * @param TokenInterface $token
     * @param string         $providerKey The provider (i.e. firewall) key
     *
     * @return Response|null
     */
    public function onAuthenticationSuccess(Request $request, TokenInterface $token, $providerKey);

    /**
     * Does this method support remember me cookies?
     *
     * Remember me cookie will be set if *all* of the following are met:
     *  A) This method returns true
     *  B) The remember_me key under your firewall is configured
     *  C) The "remember me" functionality is activated. This is usually
     *      done by having a _remember_me checkbox in your form, but
     *      can be configured by the "always_remember_me" and "remember_me_parameter"
     *      parameters under the "remember_me" firewall key
     *  D) The onAuthenticationSuccess method returns a Response object
     *
     * @return bool
     */
    public function supportsRememberMe();
}
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