datetime-duration-challenge/app/Enums/DurationModifier.php

<?php

namespace App\Enums;

enum DurationModifier: string
{
    case None = 'none';
    case Second = 'second';
    case Minute = 'minute';
    case Hour = 'hour';
    case Year = 'year';

    public function durationModiferInDays(): int | float
    {
        return match ($this) {
            self::None => 1,
            self::Second => 86400,
            self::Minute => 1440,
            self::Hour => 24,
            self::Year => 0.00273973,
        };
    }
}