UserId Provider

Authentication

<?php

namespace Authentication\ZFOAuth2UserIdProvider\Provider\UserId;

use Zend\Authentication\AuthenticationServiceInterface;
use Zend\Stdlib\RequestInterface;
use ZF\OAuth2\Provider\UserId\UserIdProviderInterface;

class Authentication implements UserIdProviderInterface
{
    /**
     * @var AuthenticationServiceInterface
     */
    private $authenticationService;

    public function __construct(AuthenticationServiceInterface $authenticationService) {
        $this->authenticationService = $authenticationService;
    }

    /**
     * Use the composed request to fetch the identity from the query string
     * argument "user_id".
     *
     * @param RequestInterface $requst
     * @return mixed
     */
    public function __invoke(RequestInterface $request)
    {
        if ($this->authenticationService->hasIdentity()) {
            return $this->authenticationService->getIdentity()->getUsername();
        }
    }
}