DateTimeImmutableCollection.php

<?php
 
declare(strict_types=1);
namespace Commercetools\Base;
 
use Commercetools\Exception\InvalidArgumentException;
use DateTimeImmutable;
 
class DateTimeImmutableCollection extends MapperScalarSequence
{
    public function add($value)
    {
        if (!$value instanceof DateTimeImmutable) {
            throw new InvalidArgumentException();
        }
        $this->store($value);
 
        return $this;
    }
 
    protected function mapper()
    {
        return function (int $index): ?DateTimeImmutable {
            $data = $this->get($index);
            if (!is_null($data) && !$data instanceof DateTimeImmutable) {
                $data = new DateTimeImmutable((string)$data);
                $this->set($data, $index);
            }
            return $data;
        };
    }
}