ClientCredentials.php

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<?php
 
namespace OAuth2\GrantType;
 
use OAuth2\ClientAssertionType\HttpBasic;
use OAuth2\ResponseType\AccessTokenInterface;
use OAuth2\Storage\ClientCredentialsInterface;
 
class ClientCredentials extends HttpBasic implements GrantTypeInterface
{
    private $clientData;
 
    public function __construct(ClientCredentialsInterface $storage, array $config = array())
    {
        $config['allow_public_clients'] = false;
 
        parent::__construct($storage, $config);
    }
 
    public function getQuerystringIdentifier()
    {
        return 'client_credentials';
    }
 
    public function getScope()
    {
        $this->loadClientData();
 
        return isset($this->clientData['scope']) ? $this->clientData['scope'] : null;
    }
 
    public function getUserId()
    {
        $this->loadClientData();
 
        return isset($this->clientData['user_id']) ? $this->clientData['user_id'] : null;
    }
 
    public function createAccessToken(AccessTokenInterface $accessToken, $client_id, $user_id, $scope)
    {
        $includeRefreshToken = false;
 
        return $accessToken->createAccessToken($client_id, $user_id, $scope, $includeRefreshToken);
    }
 
    private function loadClientData()
    {
        if (!$this->clientData) {
            $this->clientData = $this->storage->getClientDetails($this->getClientId());
        }
    }
}