Joomla Router Probleme

<?php

namespace Netzweise\Component\Seminarmanager\Site\Service;

// No direct access
defined('_JEXEC') or die;

use Joomla\CMS\Component\Router\RouterViewConfiguration;
use Joomla\CMS\Component\Router\RouterView;
use Joomla\CMS\Component\Router\Rules\StandardRules;
use Joomla\CMS\Component\Router\Rules\NomenuRules;
use Joomla\CMS\Component\Router\Rules\MenuRules;
use Joomla\CMS\Factory;
use Joomla\CMS\Categories\Categories;
use Joomla\CMS\Application\SiteApplication;
use Joomla\CMS\Categories\CategoryFactoryInterface;
use Joomla\CMS\Categories\CategoryInterface;
use Joomla\Database\DatabaseInterface;
use Joomla\CMS\Menu\AbstractMenu;
use Symfony\Component\Console\CommandLoader\FactoryCommandLoader;
use function MongoDB\BSON\fromJSON;


class Router extends RouterView
{
    private $noIDs;
    /**
     * The category factory
     *
     * @var    CategoryFactoryInterface
     *
     * @since  1.0.3
     */
    private $categoryFactory;

    /**
     * The category cache
     *
     * @var    array
     *
     * @since  1.0.3
     */
    private $categoryCache = [];

    public function __construct(SiteApplication $app, AbstractMenu $menu, CategoryFactoryInterface $categoryFactory, DatabaseInterface $db)
    {
       $params = Factory::getApplication()->getParams('com_seminarmanager');
       $this->noIDs = (bool) $params->get('sef_ids');
       $this->categoryFactory = $categoryFactory;
       
       
          $seminars = new RouterViewConfiguration('seminars');
          $this->registerView($seminars);
          $ccSeminar = new RouterViewConfiguration('seminar');
          $ccSeminar->setKey('id')->setParent($seminars);
          $this->registerView($ccSeminar);
          $seminarform = new RouterViewConfiguration('seminarform');
          $seminarform->setKey('id');
          $this->registerView($seminarform);
          $categories = new RouterViewConfiguration('categories');
          $this->registerView($categories);
          $ccCategory = new RouterViewConfiguration('category');
          $ccCategory->setKey('id')->setParent($categories);
          $this->registerView($ccCategory);

       parent::__construct($app, $menu);

       $this->attachRule(new MenuRules($this));
       $this->attachRule(new StandardRules($this));
       $this->attachRule(new NomenuRules($this));
    }

   
       public function getSeminarSegment($id, $query)
       {
            $db = Factory::getDbo();
            $dbquery = $db->getQuery(true);
            $dbquery
                ->select($dbquery->quotename('alias'))
                ->from($db->quoteName('#__seminarmanager_seminar'))
                ->where('id =' . $db->quote($id));
            $db->setQuery($dbquery);


            $id .= ':' . $db->loadResult();
            list($void,$segment) = explode(":", $id, 2);
            return array($void => $segment);
            # return array((int) $id => $id);
       }
          /**
           * Method to get the segment(s) for an seminarform
           *
           * @param   string  $id     ID of the seminarform to retrieve the segments for
           * @param   array   $query  The request that is built right now
           *
           * @return  array|string  The segments of this item
           */
          public function getSeminarformSegment($id, $query)
          {

             return $this->getSeminarSegment($id, $query);
          }
       public function getCategorySegment($id, $query)
       {
            $db = Factory::getDbo();
            $dbquery = $db->getQuery(true);

            $dbquery
                ->select($dbquery->quoteName('alias'))
                ->from($dbquery->quoteName('#__seminarmanager_categories'))
                ->where('id = ' . $db->quote($id));
            $db->setQuery($dbquery);

            $id .= ':' . $db->loadResult();

            list($void, $segment) = explode(':',$id,2);

            return array($void=>$segment);

            # return array((int) $id => $id);
       }

    
       /**
        * Method to get the segment(s) for an seminar
        *
        * @param   string  $segment  Segment of the seminar to retrieve the ID for
        * @param   array   $query    The request that is parsed right now
        *
        * @return  mixed   The id of this item or false
        */
       public function getSeminarId($segment, $query)
       {
            $db = Factory::getDbo();
            $dbquery = $db->getQuery();

            // Den folgenden Code ersetzt, weil Joomla intern immer noch einen Join über die Lanuages-Tabelle macht
            // dadurch wird kein einzelwert zurückgegeben und das Ergebnis ist immer 1 (true)

            $query = "SELECT id FROM `#__seminarmanager_seminar` WHERE alias = '$segment'";
            $db->setQuery($query);

            if (!(int)$db->loadResult())
            {
                return false;
            }


            return (int)$db->loadResult();

          # return (int) $segment;
       }

      public function getSeminarformId($segment, $query)
      {
            return $this->getSeminarId($segment, $query);
      }

       public function getCategoryId($segment, $query)
       {

            $db = Factory::getDbo();
            $dbquery = $db->getQuery();

            $query = "SELECT id FROM `#__seminarmanager_categories` WHERE alias = '$segment'";
            $db->setQuery($query);

            if (!(int) $db->loadResult())
            {
                return false;
            }
            return (int) $db->loadResult();

          # return (int) $segment;
       }

    private function getCategories(array $options = []): CategoryInterface
    {

       $key = serialize($options);

       if (!isset($this->categoryCache[$key]))
       {
          $this->categoryCache[$key] = $this->categoryFactory->createCategory($options);
       }

       return $this->categoryCache[$key];
    }
}