{
        $start = $counter = $end = 0;
        $progress = $this->progress;
        $total = count($progress);
        for ($i = 0; $i < $total; $i++) {
            if ($progress[$i]->state === RestoreProgress::STATE_ON_WORK) {
                $start = $progress[$i]->date;
                if ($i == $total - 1) {
                    $counter += $this->countRange($start, date('Y-m-d H:i:s'));
                }
            } elseif ($start != 0) {
                $counter += $this->countRange($start, $progress[$i]->date);
                $start = 0;
            }
        }

        return $counter;
    }