fn update_total_stat(&mut self, total_stat: HourlyPageViewStat, count_str: String) {
  self.total_stat = HourlyPageViewStat::default();

  if !self.encrypted.clone() {
    return;
  }

  let mut count = self.decrypt(total_stat.pv_count).parse::<u32>().unwrap();
  if count_str != "" {
    count += self.decrypt(count_str).parse::<u32>().unwrap();
  }

  let avg_duration = self.decrypt(total_stat.avg_duration).parse::<u32>().unwrap() / 2;

  self.total_stat = HourlyPageViewStat {
    sid: total_stat.sid,
    cid_count: total_stat.cid_count,
    pv_count: self.encrypt(count.to_string()),
    avg_duration: self.encrypt(avg_duration.to_string()),
    timestamp: total_stat.timestamp
  }
}