map.php

<?php
 
namespace Bitrix\Calendar\Core\Base;
 
use Bitrix\Main\ArgumentException;
 
abstract class Map extends Collection
{
    public function add($item, $key = null): self
    {
        if ($key === null)
        {
            throw new ArgumentException('you must transfer the key');
        }
 
        $this->collection[$key] = $item;
 
        if ($this->generator)
        {
            $this->generator->send($item);
        }
 
        return $this;
    }
 
    public function addItems(array $items): Collection
    {
        // $this->collection = array_replace($this->collection, $items);
 
        $this->collection = $this->collection + $items;
        return $this;
    }
 
    public function getItem($key)
    {
        return $this->collection[$key] ?? null;
    }
 
    public function has($key): bool
    {
        return isset($this->collection[$key]);
    }
 
    public function updateItem($item, $key): Map
    {
        $this->collection[$key] = $item;
 
        return $this;
    }
 
    public function getItemsByKeys(array $keys): Map
    {
        return new static(array_intersect_key($this->collection, array_flip($keys)));
    }
}