MapperFactory.php

<?php
 
declare(strict_types=1);
namespace Commercetools\Base;
 
use DateTime;
use DateTimeImmutable;
 
class MapperFactory
{
    public const TIME_FORMAT = "H:i:s.u";
    public const DATE_FORMAT = "Y-m-d";
    public const DATETIME_FORMAT = "Y-m-d?H:i:s.uT";
 
    public static function stringMapper()
    {
        return
            function ($data): ?string {
                if (is_null($data)) {
                    return null;
                }
                return (string)$data;
            };
    }
 
    public static function numberMapper()
    {
        return
            function ($data): ?float {
                if (is_null($data)) {
                    return null;
                }
                return (float)$data;
            };
    }
 
    public static function integerMapper()
    {
        return
            function ($data): ?int {
                if (is_null($data)) {
                    return null;
                }
                return (int)$data;
            };
    }
 
    public static function dateTimeMapper(string $format = self::DATETIME_FORMAT)
    {
        return
            function ($data) use ($format): ?DateTimeImmutable {
                if (is_null($data)) {
                    return null;
                }
                $date = DateTimeImmutable::createFromFormat($format, $data);
                if ($date === false) {
                    return null;
                }
                return $date;
            };
    }
}