viagogo/gogokit.php

<?php

namespace Viagogo\Core;

use GuzzleHttp\Client;
use Viagogo\Core\ViagogoConfiguration;

/**
 *
 */
class OAuthClient {
    private $url;
    private $httpClient;
    private static $tokenUrl = 'https://account.viagogo.com/oauth2/token';

    function __construct(ViagogoConfiguration $configuration) {
        if ($configuration) 
        {
            $this->url = $configuration->tokenUrl ?: OAuthClient::$tokenUrl;
            $this->httpClient = new HttpClient(new Client(['defaults' => ['auth' => [$configuration->clientId, $configuration->clientSecret]]]));
        }
    }

    public function getClientAccessToken($scopes = "") {
        $params = [
            'grant_type' => 'client_credentials',
            'scope' => $scopes,
        ];

        return $this->sendRequest($this->url, "POST", $params);
    }

    public function getPasswordAccessToken($login, $password, $scopes) {
        $params = [
            'grant_type' => 'password',
            'username' => $login,
            'password' => $password,
            'scope' => $scopes,
        ];
        return $this->sendRequest($this->url, "POST", $params);
    }

    public function getRefreshToken($refreshToken = "") {
        $params = [
            'grant_type' => 'refresh_token',
            'refresh_token' => $refreshToken,
        ];

        return $this->sendRequest($this->url, "POST", $params);
    }

    private function sendRequest($url, $method, $params) {
        $token = $this->httpClient->send($url, $method, null, $params);
        if (isset($token->error)) {
            throw new \Exception($token->error . "\n" . $token->error, 1);
        }

        return new OAuthToken($token);
    }
}