/**
* Map the field range to a week range of a week year.
* @param TemporalAccessor $temporal the temporal
* @return ValueRange the ValueRange with the range adjusted to weeks.
*/
private function rangeWeekOfWeekBasedYear(TemporalAccessor $temporal)
{
if (!$temporal->isSupported(CF::DAY_OF_YEAR())) {
return self::WEEK_OF_YEAR_RANGE();
}
$dow = $this->localizedDayOfWeek($temporal);
$doy = $temporal->get(CF::DAY_OF_YEAR());
$offset = $this->startOfWeekOffset($doy, $dow);
$week = $this->computeWeek($offset, $doy);
if ($week === 0) {
// Day is in end of week of previous year
// Recompute from the last day of the previous year
$date = AbstractChronology::from($temporal)->dateFrom($temporal);
$date = $date->minus($doy + 7, ChronoUnit::DAYS());
// Back down into previous year
return $this->rangeWeekOfWeekBasedYear($date);
}
// Check if day of year is in partial week associated with next year
$dayRange = $temporal->range(CF::DAY_OF_YEAR());
$yearLen = $dayRange->getMaximum();
$newYearWeek = $this->computeWeek($offset, $yearLen + $this->weekDef->getMinimalDaysInFirstWeek());
if ($week >= $newYearWeek) {
// Overlaps with weeks of following year; recompute from a week in following year
$date = AbstractChronology::from($temporal)->dateFrom($temporal);
$date = $date->plus($yearLen - $doy + 1 + 7, ChronoUnit::DAYS());
return $this->rangeWeekOfWeekBasedYear($date);
}
return ValueRange::of(1, $newYearWeek - 1);
}
