Sharing::getPublicUserLinkAction

public function getPublicUserLinkAction(): ?array
{
	$sharing = new BitrixCalendarSharingSharing(CCalendar::GetCurUserId());
	$activeLinkUrl = $sharing->getActiveLinkUrl();

	if(empty($activeLinkUrl))
	{
		$this->addError(new Error('Sharing is disabled', 100040));
		return null;
	}

	return [
		static::ITEM => [
			'shortUrl'=> BitrixCalendarSharingHelper::getShortUrl($activeLinkUrl)
		]
	];
}