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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\authclient\clients;
use yii\authclient\OAuth2;
use yii\authclient\OAuthToken;
/**
* Facebook allows authentication via Facebook OAuth.
*
* In order to use Facebook OAuth you must register your application at <https://developers.facebook.com/apps>.
* Add an app. In "Settings" -> "Basic" specify "App Domains". There you can obtain ID and Secret values to
* put into config. In "Products" press "+" and add "Facebook Login". In its settings make sure you enabled
* "Web OAuth Login" and specify "Valid OAuth Redirect URIs" as "https://example.com/auth?authclient=facebook".
*
* Example application configuration:
*
* ```php
* 'components' => [
* 'authClientCollection' => [
* 'class' => 'yii\authclient\Collection',
* 'clients' => [
* 'facebook' => [
* 'class' => 'yii\authclient\clients\Facebook',
* 'clientId' => 'facebook_client_id',
* 'clientSecret' => 'facebook_client_secret',
* ],
* ],
* ]
* // ...
* ]
* ```
*
* @see https://developers.facebook.com/apps
* @see http://developers.facebook.com/docs/reference/api
*
* @author Paul Klimov <klimov.paul@gmail.com>
* @since 2.0
*/
class Facebook extends OAuth2
{
/**
* {@inheritdoc}
*/
public $authUrl = 'https://www.facebook.com/dialog/oauth';
/**
* {@inheritdoc}
*/
public $tokenUrl = 'https://graph.facebook.com/oauth/access_token';
/**
* {@inheritdoc}
*/
public $apiBaseUrl = 'https://graph.facebook.com';
/**
* {@inheritdoc}
*/
public $scope = 'email';
/**
* @var array list of attribute names, which should be requested from API to initialize user attributes.
* @since 2.0.5
*/
public $attributeNames = [
'name',
'email',
];
/**
* {@inheritdoc}
*/
public $autoRefreshAccessToken = false; // Facebook does not provide access token refreshment
/**
* @var bool whether to automatically upgrade short-live (2 hours) access token to long-live (60 days) one, after fetching it.
* @see exchangeToken()
* @since 2.1.3
*/
public $autoExchangeAccessToken = false;
/**
* @var string URL endpoint for the client auth code generation.
* @see https://developers.facebook.com/docs/facebook-login/access-tokens/expiration-and-extension
* @see fetchClientAuthCode()
* @see fetchClientAccessToken()
* @since 2.1.3
*/
public $clientAuthCodeUrl = 'https://graph.facebook.com/oauth/client_code';
/**
* {@inheritdoc}
*/
protected function initUserAttributes()
{
return $this->api('me', 'GET', [
'fields' => implode(',', $this->attributeNames),
]);
}
/**
* {@inheritdoc}
*/
public function applyAccessTokenToRequest($request, $accessToken)
{
parent::applyAccessTokenToRequest($request, $accessToken);
$data = $request->getData();
if (($machineId = $accessToken->getParam('machine_id')) !== null) {
$data['machine_id'] = $machineId;
}
$data['appsecret_proof'] = hash_hmac('sha256', $accessToken->getToken(), $this->clientSecret);
$request->setData($data);
}
/**
* {@inheritdoc}
*/
protected function defaultName()
{
return 'facebook';
}
/**
* {@inheritdoc}
*/
protected function defaultTitle()
{
return 'Facebook';
}
/**
* {@inheritdoc}
*/
protected function defaultViewOptions()
{
return [
'popupWidth' => 860,
'popupHeight' => 480,
];
}
/**
* {@inheritdoc}
*/
public function fetchAccessToken($authCode, array $params = [])
{
$token = parent::fetchAccessToken($authCode, $params);
if ($this->autoExchangeAccessToken) {
$token = $this->exchangeAccessToken($token);
}
return $token;
}
/**
* Exchanges short-live (2 hours) access token to long-live (60 days) one.
* Note that this method will success for already long-live token, but will not actually prolong it any further.
* Pay attention, that this method will fail on already expired access token.
* @see https://developers.facebook.com/docs/facebook-login/access-tokens/expiration-and-extension
* @param OAuthToken $token short-live access token.
* @return OAuthToken long-live access token.
* @since 2.1.3
*/
public function exchangeAccessToken(OAuthToken $token)
{
$params = [
'grant_type' => 'fb_exchange_token',
'fb_exchange_token' => $token->getToken(),
];
$request = $this->createRequest()
->setMethod('POST')
->setUrl($this->tokenUrl)
->setData($params);
$this->applyClientCredentialsToRequest($request);
$response = $this->sendRequest($request);
$token = $this->createToken(['params' => $response]);
$this->setAccessToken($token);
return $token;
}
/**
* Requests the authorization code for the client-specific access token.
* This make sense for the distributed applications, which provides several Auth clients (web and mobile)
* to avoid triggering Facebook's automated spam systems.
* @see https://developers.facebook.com/docs/facebook-login/access-tokens/expiration-and-extension
* @see fetchClientAccessToken()
* @param OAuthToken|null $token access token, if not set [[accessToken]] will be used.
* @param array $params additional request params.
* @return string client auth code.
* @since 2.1.3
*/
public function fetchClientAuthCode(OAuthToken $token = null, $params = [])
{
if ($token === null) {
$token = $this->getAccessToken();
}
$params = array_merge([
'access_token' => $token->getToken(),
'redirect_uri' => $this->getReturnUrl(),
], $params);
$request = $this->createRequest()
->setMethod('POST')
->setUrl($this->clientAuthCodeUrl)
->setData($params);
$this->applyClientCredentialsToRequest($request);
$response = $this->sendRequest($request);
return $response['code'];
}
/**
* Fetches access token from client-specific authorization code.
* This make sense for the distributed applications, which provides several Auth clients (web and mobile)
* to avoid triggering Facebook's automated spam systems.
* @see https://developers.facebook.com/docs/facebook-login/access-tokens/expiration-and-extension
* @see fetchClientAuthCode()
* @param string $authCode client auth code.
* @param array $params
* @return OAuthToken long-live client-specific access token.
* @since 2.1.3
*/
public function fetchClientAccessToken($authCode, array $params = [])
{
$params = array_merge([
'code' => $authCode,
'redirect_uri' => $this->getReturnUrl(),
'client_id' => $this->clientId,
], $params);
$request = $this->createRequest()
->setMethod('POST')
->setUrl($this->tokenUrl)
->setData($params);
$response = $this->sendRequest($request);
$token = $this->createToken(['params' => $response]);
$this->setAccessToken($token);
return $token;
}
}