RefreshFlowTokenProvider.php

<?php
 
declare(strict_types=1);
 
namespace Commercetools\Client;
 
use GuzzleHttp\Client;
 
class RefreshFlowTokenProvider implements TokenProvider
{
    public const GRANT_TYPE = 'grant_type';
    public const GRANT_TYPE_REFRESH_TOKEN = 'refresh_token';
    public const REFRESH_TOKEN = 'refresh_token';
    public const ACCESS_TOKEN = 'access_token';
    public const EXPIRES_IN = 'expires_in';
 
    private $client;
 
    private $credentials;
 
    private $accessTokenUrl;
 
    private $tokenStorage;
 
    public function __construct(
        Client $client,
        string $accessTokenUrl,
        ClientCredentials $credentials,
        TokenStorage $tokenStorage
    ) {
        $this->accessTokenUrl = $accessTokenUrl;
        $this->client = $client;
        $this->credentials = $credentials;
        $this->tokenStorage = $tokenStorage;
    }
 
    public function getToken(): Token
    {
        return $this->refreshToken();
    }
 
    public function refreshToken(): Token
    {
        $refreshToken = $this->tokenStorage->getRefreshToken();
        $data = [
            self::GRANT_TYPE => self::GRANT_TYPE_REFRESH_TOKEN,
            self::REFRESH_TOKEN => $refreshToken,
        ];
        $options = [
            'form_params' => $data,
            'auth' => [$this->credentials->getClientId(), $this->credentials->getClientSecret()],
        ];
 
        $result = $this->client->post($this->accessTokenUrl, $options);
 
        $body = json_decode((string) $result->getBody(), true);
 
        return new RefreshableTokenModel(
            (string) $body[self::ACCESS_TOKEN],
            (int) $body[self::EXPIRES_IN],
            $refreshToken
        );
    }
}