GT-Volk / working-time

            //$diff = $nextJobDT->diff($dateTime);

            $jobMinutesInDay = $this->getJobMinutesInDay($nextJobDT->format('Y-m-d H:i'));

            // Если длинна дня больше чем время модификации

            if ($jobMinutesInDay > $minutes) {

                $nextJobDT->modify("+$minutes minutes");

            } else { // Если длинна дня меньше чем время модификации

                do {

                    $nextJobDT->modify("+$jobMinutesInDay minutes");

                    $minutes -= $jobMinutesInDay;

                    $nextWorkingTime = $this->nextWorkingTime($nextJobDT->format('Y-m-d H:i'));

                    $nextJobDT = new \DateTime($nextWorkingTime);

                    $jobMinutesInDay = $this->getJobMinutesInDay($nextJobDT->format('Y-m-d H:i'));

                    if ($jobMinutesInDay > $minutes) {

                        $nextJobDT->modify("+$minutes minutes");

                        $minutes = 0;

                    }

                } while ($minutes > 0);

            }

            if ($date === null) {

                $this->dateTime->setTimestamp($nextJobDT->getTimestamp());

            }

            $jobMinutesInDay = $this->getJobMinutesInDay($dateTime->format('Y-m-d H:i'));

            if ($jobMinutesInDay > $minutes) {

                $dateTime->modify("+$minutes minutes");

            } else { // Если длинна дня меньше чем время модификации

                do {

                    $dateTime->modify("+$jobMinutesInDay minutes");

                    $minutes -= $jobMinutesInDay;

                    $nextWorkingTime = $this->nextWorkingTime($dateTime->format('Y-m-d H:i'));

                    $dateTime = new \DateTime($nextWorkingTime);

                    $jobMinutesInDay = $this->getJobMinutesInDay($dateTime->format('Y-m-d H:i'));

                    if ($jobMinutesInDay > $minutes) {

                        $dateTime->modify("+$minutes minutes");

                        $minutes = 0;

                    }

                } while ($minutes > 0);

            }

            if ($date === null) {

                $this->dateTime->setTimestamp($dateTime->getTimestamp());

            }