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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\auth\provider\oauth\service;
/**
* Facebook OAuth service
*/
class facebook extends base
{
    /**
    * phpBB config
    *
    * @var \phpbb\config\config
    */
    protected $config;
    /**
    * phpBB request
    *
    * @var \phpbb\request\request_interface
    */
    protected $request;
    /**
    * Constructor
    *
    * @param    \phpbb\config\config                $config
    * @param    \phpbb\request\request_interface     $request
    */
    public function __construct(\phpbb\config\config $config, \phpbb\request\request_interface $request)
    {
        $this->config = $config;
        $this->request = $request;
    }
    /**
    * {@inheritdoc}
    */
    public function get_service_credentials()
    {
        return array(
            'key'        => $this->config['auth_oauth_facebook_key'],
            'secret'    => $this->config['auth_oauth_facebook_secret'],
        );
    }
    /**
    * {@inheritdoc}
    */
    public function perform_auth_login()
    {
        if (!($this->service_provider instanceof \OAuth\OAuth2\Service\Facebook))
        {
            throw new exception('AUTH_PROVIDER_OAUTH_ERROR_INVALID_SERVICE_TYPE');
        }
        // This was a callback request, get the token
        $this->service_provider->requestAccessToken($this->request->variable('code', ''));
        // Send a request with it
        $result = json_decode($this->service_provider->request('/me'), true);
        // Return the unique identifier
        return $result['id'];
    }
    /**
    * {@inheritdoc}
    */
    public function perform_token_auth()
    {
        if (!($this->service_provider instanceof \OAuth\OAuth2\Service\Facebook))
        {
            throw new exception('AUTH_PROVIDER_OAUTH_ERROR_INVALID_SERVICE_TYPE');
        }
        // Send a request with it
        $result = json_decode($this->service_provider->request('/me'), true);
        // Return the unique identifier
        return $result['id'];
    }
}