Nextcloud-App/lib/Db/ChatMapper.php

<?php

namespace OCA\UPschooling\Db;

use Doctrine\DBAL\Types\Type;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Db\Entity;
use OCP\AppFramework\Db\QBMapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;

class ChatMapper extends QBMapper
{
	public function __construct(IDBConnection $db)
	{
		parent::__construct($db, 'upschooling_chats', MatrixChat::class);
	}

	/**
	 * @param int $ticketId
	 * @return array array of Entity|MatrixChat
	 */
	public function findForTicket(int $ticketId): array
	{
		/* @var $qb IQueryBuilder */
		$qb = $this->db->getQueryBuilder();
		$qb->select('*')
			->from('upschooling_chats')
			->where($qb->expr()->eq('ticket_id', $qb->createNamedParameter($ticketId, IQueryBuilder::PARAM_INT)));
		return $this->findEntities($qb);
	}

	/**
	 * @param int $ticketId
	 * @return Entity|MatrixChat
	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
	 * @throws DoesNotExistException
	 */
	public function findCurrent(int $ticketId): MatrixChat
	{
		/* @var $qb IQueryBuilder */
		$qb = $this->db->getQueryBuilder();
		$qb->select('*')
			->from('upschooling_chats')
			->where(
				$qb->expr()->eq('ticket_id', $qb->createNamedParameter($ticketId, IQueryBuilder::PARAM_INT)),
				$qb->expr()->isNull('date_end')
			);
		return $this->findEntity($qb);
	}

	/**
	 * @param \DateTime $dateTime
	 * @return mixed The database representation of the datetime with timezone.
	 * @throws \Doctrine\DBAL\Exception
	 * @throws \Doctrine\DBAL\Types\ConversionException
	 */
	public function convertDateTimeTz(\DateTime $dateTime)
	{
		$dateTimeTzType = Type::getType("datetimetz");
		return $dateTimeTzType->convertToDatabaseValue($dateTime, $this->db->getDatabasePlatform());
	}
}