public function getLoggedInMemberID($dbConnection = null)
{
global $facebook;
global $session;
$facebookID = null;
$sessionKey = null;
$memberID = null;
$valid = false;
try {
//session_start();
// TODO: Remove
if (SiteConstants::DEBUG) {
$memberID = SiteConstants::DEBUG_USER;
} else {
// Session based API call.
$facebookID = $facebook->getUser();
if ($facebookID != null) {
if (isset($_SESSION[LoginController::SESSION_ID])) {
$sessionKey = $_SESSION[LoginController::SESSION_ID];
}
if ($sessionKey != null) {
$memberID = SessionDao::selectSessionMemberID($sessionKey, $dbConnection);
if ($memberID == $facebookID) {
$valid = true;
}
}
}
}
//If facebook ID does not match the stored session member ID then clear the session.
if (!$valid) {
unset($_SESSION[LoginController::SESSION_ID]);
$memberID = null;
}
} catch (Exception $ex) {
$memberID = null;
}
return $memberID;
}
