/**
* validate the response from facebook
*/
protected function executeProcessOAuth2Response()
{
$this->tokenError = null;
$appId = $this->getFromConfig(FacebookConstants::FACEBOOK_APP_ID_REQUEST_PARAM);
$appSecret = $this->getFromConfig(FacebookConstants::FACEBOOK_APP_SECRET_REQUEST_PARAM);
$pageId = base64_decode($this->getRequestParameter(FacebookConstants::FACEBOOK_PAGE_ID_REQUEST_PARAM));
$providerId = base64_decode($this->getRequestParameter(FacebookConstants::FACEBOOK_PROVIDER_ID_REQUEST_PARAM));
$ks = $this->getRequestParameter(FacebookConstants::FACEBOOK_KS_REQUEST_PARAM);
$permissions = explode(',', base64_decode($this->getRequestParameter(FacebookConstants::FACEBOOK_PERMISSIONS_REQUEST_PARAM)));
try {
$accessURL = $this->getFacebookDistributionAccessURL($providerId, $ks);
$dataHandler = new kDistributionPersistentDataHandler($accessURL);
$userAccessToken = FacebookGraphSdkUtils::getLongLivedUserAccessToken($appId, $appSecret, $dataHandler, $permissions);
if ($userAccessToken) {
$pageAccessToken = FacebookGraphSdkUtils::getPageAccessToken($appId, $appSecret, $userAccessToken, $pageId, $dataHandler);
if ($pageAccessToken) {
$dataHandler->set('userAccessToken', $userAccessToken);
$dataHandler->set('pageAccessToken', $pageAccessToken);
}
}
} catch (Exception $e) {
$this->tokenError = true;
$this->errorMessage = $e->getMessage();
}
}
