/**
* Returns Day that is after given offset (calculated for given year)
* @param string $offset
* @param integer $year
* @return Day
*/
public function modify($offset, $year)
{
$dt = $this->toDateTime($year);
$dt->modify($offset);
return Day::fromDateTime($dt);
}
/**
* Returns referenced day from the calendar
* @param Calendar $calendar calendar in which day has to be looked
* @param integer $year year for which the day has to be calculated
* @return null|Day
*/
public function getReferencedDay(Calendar $calendar, $year = null)
{
$day = $calendar->getDay($this->getEvent(), $year);
if (!$day) {
return null;
}
if ($this->getOffsetValue() === 0) {
$referencedDay = $day;
} else {
$dt = $day->toDateTime($year);
$dt->modify($this->getOffsetString());
$referencedDay = Day::fromDateTime($dt);
}
return $referencedDay;
}
