(fix) use indexed principal uri to get calendar object

use OCP\Mail\IMailer;

use Psr\Log\LoggerInterface;

use Sabre\VObject\Reader;

use OCA\DAV\Connector\Sabre\Principal;

class InvitationMiddleware extends Middleware {

	private $request;

		LoggerInterface $logger,

		IUserManager $iusermanager,

		IFactory $languageFactory,

		private Principal $principalBackend,

	) {

		$this->request = $request;

		$this->config = $config;

			$uid = $row['uid'];

			$sender = substr($row['attendee'], 7);

			$recipient = substr($row['organizer'], 7);

			$organizer = $row['organizer'];

			$recipient = substr($organizer, 7);

			$principalUriOfOrganizer = $this->principalBackend->findByUri($organizer, 'principals/users');

			$query2 = $this->db->getQueryBuilder();

			$query2

				->select('*')

				->from('calendarobjects')

				->select('co.*')

				->from('calendarobjects', 'co')

				->join('co', 'calendars', 'c', $query2->expr()->eq('co.calendarid', 'c.calendarid'))

				->where(

					$query

					$query2

						->expr()

						->eq('uid', $query2->createNamedParameter($uid))

				);

				)->andWhere('c.principaluri', $query2->createNamedParameter($principalUriOfOrganizer));

			$stmt2 = $query2->execute();

			$row2 = $stmt2->fetch(\PDO::FETCH_ASSOC);

			$calendarobjectid = $row2['id'];