function isLinked(){
global $mainframe;
$facebook = plgSystemmyApiConnect::getFacebook();
JRequest::checkToken( 'get' ) or die( 'Invalid Token' );
$db = JFactory::getDBO();
$uid = JRequest::getVar('fbId','','get');
$query = "SELECT userId FROM ".$db->nameQuote('#__myapi_users')." WHERE uid =".$db->quote($uid);
$db->setQuery($query);
$db->query();
$num_rows = $db->getNumRows();
$query_id = $db->loadResult();
$facebook->setSession(array('access_token' => JRequest::getVar('access_token'), 'sig' => JRequest::getVar('sig'), 'uid' => JRequest::getVar('uid'),'expires' => JRequest::getVar('expires'),'secret' => JRequest::getVar('secret'),'session_key' => JRequest::getVar('session_key'),'base_domain' => JRequest::getVar('base_domain')));
$session = $facebook->getSession();
if($num_rows == 0){
require_once JPATH_ADMINISTRATOR.DS.'components'.DS.'com_myapi'.DS.'models'.DS.'facebook.php';
$facebookmodel = new myapiModelfacebook; //Bring the myAPI facebook model
global $fbUser;
$fbUser = $facebookmodel->getLoggedInUser(JRequest::getVar('access_token',NULL));
$db = JFactory::getDBO();
$query = "SELECT COUNT(".$db->nameQuote('id').") FROM ".$db->nameQuote('#__users')." WHERE ".$db->nameQuote('email')." = ".$db->quote($fbUser['email']);
$db->setQuery($query);
$registeredEmail = $db->loadResult();
if($registeredEmail){
MyapiController::showRegisterWindow();
}else{
MyapiController::newUser();
$data = array();
$data[] = "document.myApiLoginForm.submit();";
echo json_encode($data);
$mainframe->close();
}
}else{
$options['return'] = JRequest::getVar('return');
$options['uid'] = $uid;
$error = $mainframe->login($uid,$options);
$data = array();
$data[] = "document.myApiLoginForm.submit();";
echo json_encode($data);
$mainframe->close();
}
}
