excludeddatescollection.php

См. документацию.

<?php
 
namespace Bitrix\Calendar\Core\Event\Properties;
 
use Bitrix\Calendar\Core\Base\Date;
use Bitrix\Calendar\Core\Base\PropertyCollection;
 
 
class ExcludedDatesCollection extends PropertyCollection
{
    public const EXCLUDED_DATE_FORMAT = 'd.m.Y';

    public function toString(string $separator = ';'): string
    {
        return implode(
            $separator,
            array_unique(
                array_map(
                    fn (Date $date) => $date->format(\CCalendar::DFormat(false)),
                    $this->collection)
            ));
    }

    public function getDateCollectionNewerThanInterval(string $interval = '1 month'): ExcludedDatesCollection
    {
        $timestamp = (new Date())->sub($interval)->getTimestamp();
 
        $exdateCollection = new static();

        foreach ($this->collection as $item)
        {
            if ($item->getTimestamp() > $timestamp)
            {
                $exdateCollection->add($item);
            }
        }
 
        return $exdateCollection;
    }
 
    public function removeDateFromCollection(Date $date): void
    {
        foreach ($this->collection as $key => $item)
        {
            if ($item->format('d.m.Y') === $date->format('d.m.Y'))
            {
                unset($this->collection[$key]);
            }
        }
    }
}