chill-bundles/src/Bundle/ChillCalendarBundle/Controller/CalendarRangeAPIController.php

<?php

namespace Chill\CalendarBundle\Controller;

use Chill\MainBundle\CRUD\Controller\ApiController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\Response;
use Chill\MainBundle\Pagination\PaginatorInterface;
use Chill\MainBundle\Serializer\Model\Collection;

class CalendarRangeAPIController extends ApiController
{

    /**
     * @Route("/api/1.0/calendar/calendar-range-available.{_format}", name="chill_api_single_calendar_range_available")
     */
    public function availableRanges(Request $request, string $_format): JsonResponse
    {
        if ($request->query->has('user')) {
            $user = $request->query->get('user');
        }

        $em = $this->getDoctrine()->getManager();

        $query = $em->createQuery(
            'SELECT c FROM ChillCalendarBundle:CalendarRange c 
            WHERE NOT EXISTS (SELECT cal.id FROM ChillCalendarBundle:Calendar cal WHERE cal.calendarRange = c.id)')
        ;

        $results = $query->getResult();

        return $this->json(['count' => count($results), 'results' => $results], Response::HTTP_OK, [], [ 'groups' => [ 'read' ]]);
        //TODO use also the paginator, eg return $this->serializeCollection('get', $request, $_format, $paginator, $results);
    }

}