public function getSecondsBySession($for = null, $session)
{
if ($for) {
$sum = UserSession::find()->where(['session_id' => $session->id, 'user_id' => $for->getId()])->sum('stop_timestamp-start_timestamp');
if ($sum === null) {
if ($sess = UserSession::find()->where(['session_id' => $session->id, 'user_id' => $for->getId()])->one()) {
$sum = time() - $sess->start_timestamp;
}
}
} else {
$sum = SessionModel::find()->where(['session_id' => $session->id])->sum('stop_timestamp-start_timestamp');
if ($sum === null) {
if ($sess = SessionModel::find()->where(['session_id' => $session->id])->one()) {
$sum = time() - $sess->start_timestamp;
}
}
}
return $sum;
}
