HiEventsDev/Hi.Events

use Carbon\Carbon;

class DateHelper
{
    public static function convertToUTC(string $eventDate, string $userTimezone): string
    {
        return Carbon::parse($eventDate, $userTimezone)
            ->setTimezone('UTC')
            ->toString();
    }

    public static function convertFromUTC(string $eventDate, string $userTimezone): string
    {
        return Carbon::parse($eventDate, 'UTC')
            ->setTimezone($userTimezone)
            ->toString();
    }

    public static function utcDateIsPast(string $eventDate): bool
    {
        return Carbon::parse($eventDate, 'UTC')->isPast();
    }

    public static function utcDateIsFuture(string $eventDate): bool
    {
        return Carbon::parse($eventDate, 'UTC')->isFuture();
    }
}

use HiEvents\Helper\DateHelper;
use HiEvents\Services\Handlers\Event\DTO\UpdateEventDTO;

readonly class UpdateEventHandler
{
    // ...

    private function updateEventAttributes(UpdateEventDTO $eventData): void
    {
        $existingEvent = $this->fetchExistingEvent($eventData);

        if ($eventData->currency !== null && $eventData->currency !== $existingEvent->getCurrency()) {
            $this->checkForCompletedOrders($eventData);
        }

        $this->eventRepository->updateWhere(
            attributes: [
                'title' => $eventData->title,
                'start_date' => DateHelper::convertToUTC($eventData->start_date, $eventData->timezone),
                'end_date' => $eventData->end_date
                    ? DateHelper::convertToUTC($eventData->end_date, $eventData->timezone)
                    : null,
                'description' => $this->purifier->purify($eventData->description),
                'timezone' => $eventData->timezone ?? $existingEvent->getTimezone(),
                'currency' => $eventData->currency ?? $existingEvent->getCurrency(),
                'location' => $eventData->location,
                'location_details' => $eventData->location_details?->toArray(),
            ],
            where: [
                'id' => $eventData->id,
                'account_id' => $eventData->account_id,
            ],
        );
    }

    // ...
}