Impact::matchWorkingTime

private function matchWorkingTime(DateTime $startDate = null, Datetime $endDate = null, $duration = null)
{
	if(!$this->getMatchWorkTime())
	{
		return; // do nothing, dates are okay already
	}
	else
	{
		$calendar = Calendar::getInstance();

		if ($startDate && $endDate)
		{
			$this->correctWorkTime($startDate, $endDate, $duration);
		}
		elseif($startDate)
		{
			$this->setStartDatePlanUserTimeGmt($calendar->getClosestWorkTime($startDate, true)->toStringGmt());

			$start = $this->getStartDatePlanGmt(true);
			$end = $this->getEndDatePlanGmt();

			if($end !== null && $start->checkGT($end))
			{
				$this->setEndDatePlanUserTimeGmt($calendar->calculateEndDate($startDate, $end->getTimestamp() - $startDate->getTimestamp())->toStringGmt());
			}
		}
		elseif($endDate)
		{
			$this->setEndDatePlanUserTimeGmt($calendar->getClosestWorkTime($endDate, false)->toStringGmt());

			$start = ($startDate == null? null : $this->getStartDatePlanGmt(true));
			$end = $this->getEndDatePlanGmt();

			if($start !== null && $start->checkGT($end))
			{
				$this->setStartDatePlanUserTimeGmt($calendar->calculateStartDate($end, $endDate->getTimestamp() - $start->getTimestamp())->toStringGmt());
			}
		}
	}
}