static function Refresh_fb_token($user_ID)
{
// https://developers.facebook.com/docs/offline-access-deprecation/
$token = WPAL2Int::Get_access_token($user_ID);
if ($token) {
$url = 'https://graph.facebook.com/v2.2/oauth/access_token';
$url = apply_filters('al2fb_url', $url);
$query = http_build_query(array('client_id' => get_user_meta($user_ID, c_al2fb_meta_client_id, true), 'client_secret' => get_user_meta($user_ID, c_al2fb_meta_app_secret, true), 'grant_type' => 'fb_exchange_token', 'fb_exchange_token' => $token), '', '&');
$response = WPAL2Int::Request($url, $query, 'GET');
$access_token = WPAL2Int::Process_fb_token($response);
update_user_meta($user_ID, c_al2fb_meta_access_token, $access_token);
update_user_meta($user_ID, c_al2fb_meta_token_time, date('c'));
return $access_token;
}
return false;
}