[FEATURE] Always show top events first

[derhansen]

Add an option in the event list and search plugin, so it is possible to show top events in the result list on top.

Example for Repository:

        $orderings['top_event'] = QueryInterface::ORDER_DESCENDING;
        $orderings['startdate'] = QueryInterface::ORDER_ASCENDING;

Should be a new option in the event demand.

[merzilla]

Hi,
you can achieve this by using the event ModifyEventQueryConstraintsEvent from EventRepository.

E.g. the invoke method can look like this:

public function __invoke(ModifyEventQueryConstraintsEvent $event): void
    {
        $eventDemand = $event->getEventDemand();
        $query = $event->getQuery();

        // set to order by topEvent always
        $orderings['topEvent'] = 'DESC';
        // add more ordering by settings from plugin
        if ($eventDemand->getOrderField() !== '') {
            $orderings[$eventDemand->getOrderField()] = ((strtolower($eventDemand->getOrderDirection()) === 'desc') ?
                QueryInterface::ORDER_DESCENDING :
                QueryInterface::ORDER_ASCENDING);
        }
        $query->setOrderings($orderings);

        // this line prevents overriding the ordering in the repository. We set it here above.
        $eventDemand->setOrderField('not allowed');
    }