attachcollection.php

<?php
 
 
namespace Bitrix\Calendar\ICal\Builder;
 
 
use Bitrix\Calendar\SerializeObject;
use ArrayIterator;
use IteratorAggregate;
use LogicException;
use Serializable;
 
class AttachCollection implements IteratorAggregate, Serializable
{
    use SerializeObject;
    private $collection;
 
    public static function createInstance(array $collection = []): AttachCollection
    {
        return new self($collection);
    }
 
    public function __construct(array $collection = [])
    {
        if (!$this->checkCollection($collection))
        {
            throw new LogicException('The collection contains elements of the wrong class. You need to pass a collection of objects Bitrix\\Calendar\\ICal\\Parser\\Attendee');
        }
        $this->collection = $collection;
    }
 
    public function add(Attach $attach): AttachCollection
    {
        $this->collection[] = $attach;
 
        return $this;
    }
 
    public function getCollection(): array
    {
        return $this->collection;
    }
 
    public function getIterator(): ArrayIterator
    {
        return new ArrayIterator($this->collection);
    }
 
    public function getCount(): int
    {
        return count($this->collection);
    }
    private function checkCollection(array $collection): bool
    {
        if (is_null($collection))
        {
            return true;
        }
 
        $attach = array_filter($collection, function ($attach) {
            return !($attach instanceof Attach);
        });
 
        return empty($attach);
    }
}