durationdatebased.php

<?php
namespace Bitrix\Sender\Dispatch;
 
use Bitrix\Main\Localization\Loc;
 
use Bitrix\Main\Type\DateTime;
use Bitrix\Sender\Entity;
 
Loc::loadMessages(__FILE__);
 
class DurationDateBased
{
    private $letter;
 
    public function __construct(Entity\Letter $letter)
    {
        $this->letter = $letter;
    }
 
    public function getInterval($count)
    {
        $sent = $this->letter->getCounter()->getSent();
        if (!$sent)
        {
            return 0;
        }
 
        return ceil(($this->getElapsedInterval() / $sent) * $count);
    }
 
    private function getElapsedInterval()
    {
        $start = $this->letter->get('DATE_SEND');
        if (!$start)
        {
            return 0;
        }
 
        $now = new DateTime;
        return $now->getTimestamp() - $start->getTimestamp();
    }
}