UserCredentials.php

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<?php
 
namespace OAuth2\GrantType;
 
use OAuth2\Storage\UserCredentialsInterface;
use OAuth2\ResponseType\AccessTokenInterface;
use OAuth2\RequestInterface;
use OAuth2\ResponseInterface;
 
class UserCredentials implements GrantTypeInterface
{
    private $userInfo;
 
    protected $storage;
 
    public function __construct(UserCredentialsInterface $storage)
    {
        $this->storage = $storage;
    }
 
    public function getQuerystringIdentifier()
    {
        return 'password';
    }
 
    public function validateRequest(RequestInterface $request, ResponseInterface $response)
    {
        if (!$request->request("password") || !$request->request("username")) {
            $response->setError(400, 'invalid_request', 'Missing parameters: "username" and "password" required');
 
            return null;
        }
 
        if (!$this->storage->checkUserCredentials($request->request("username"), $request->request("password"))) {
            $response->setError(401, 'invalid_grant', 'Invalid username and password combination');
 
            return null;
        }
 
        $userInfo = $this->storage->getUserDetails($request->request("username"));
 
        if (empty($userInfo)) {
            $response->setError(400, 'invalid_grant', 'Unable to retrieve user information');
 
            return null;
        }
 
        if (!isset($userInfo['user_id'])) {
            throw new \LogicException("you must set the user_id on the array returned by getUserDetails");
        }
 
        $this->userInfo = $userInfo;
 
        return true;
    }
 
    public function getClientId()
    {
        return null;
    }
 
    public function getUserId()
    {
        return $this->userInfo['user_id'];
    }
 
    public function getScope()
    {
        return isset($this->userInfo['scope']) ? $this->userInfo['scope'] : null;
    }
 
    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
    {
        return $accessToken->createAccessToken($client_id, $user_id, $scope);
    }
}