LoginByApiToken middleware for AsgardCMS

LoginByApiToken.php

<?php

namespace Modules\Module\Http\Middleware;

use Cartalyst\Sentinel\Laravel\Facades\Sentinel;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Modules\User\Entities\UserToken;
use Modules\User\Repositories\UserTokenRepository;

class LoginByApiToken
{
    /**
     * @var UserTokenRepository
     */
    private $userTokenRepository;

    /**
     * @var UserToken
     */
    private $userToken;

    public function __construct(UserTokenRepository $userTokenRepository)
    {
        $this->userTokenRepository = $userTokenRepository;
    }

    public function handle(Request $request, \Closure $next)
    {
        $authorizationHeader = $request->header('Authorization');

        if ($authorizationHeader === null) {
            return new Response('Unauthorized', 401);
        }

        if ($this->isValidToken($authorizationHeader) === false) {
            return new Response('Unauthorized', 401);
        }

        if ($this->userToken->user === null) {
            return new Response('Unauthorized', 401);
        }

        $this->logUserIn($this->userToken);

        return $next($request);
    }

    private function isValidToken($token)
    {
        $found = $this->getUserFromToken($token);

        if ($found === null) {
            return false;
        }

        return true;
    }

    private function getUserFromToken($token)
    {
        return $this->userToken = $this->userTokenRepository->findByAttributes(['access_token' => $this->parseToken($token)]);
    }

    private function parseToken($token)
    {
        return str_replace('Bearer ', '', $token);
    }

    private function logUserIn(UserToken $userToken)
    {
        $user = Sentinel::findById($userToken->user_id);

        Sentinel::login($user);
    }
}