/**
* Checks if ranges are equal.
*
* @param DateRange $range The range to compare to.
*
* @return boolean
*
* @since 2.0.0
*/
public function equals(DateRange $range)
{
return $this->range->equals($range->range);
}
/**
* Compares two objects.
*
* @param DateTimeRange $a Base object.
* @param DateTimeRange $b Object to compare to.
*
* @return integer
*
* @since 2.0.0
* @throws \InvalidArgumentException
*/
private static function compare(DateTimeRange $a, DateTimeRange $b)
{
if (!$a->interval->equals($b->interval)) {
throw new \InvalidArgumentException('Intervals of ranges are not equal.');
}
if ($a->equals($b)) {
return 0;
}
if ($a->start()->isAfter($b->start())) {
return 1;
}
if ($a->start()->isBefore($b->start()) || $a->end()->isBefore($b->end())) {
return -1;
}
return 1;
}
