DataSyncManager::modifySingleEvent

private function modifySingleEvent(Connection $connection, array $event, array $additionalParams): ?int
{
	$eventObject = $this->prepareEventParams(
		$event,
		$additionalParams['SECTION_ID'],
		$connection->getOwner()->getId()
	);

	if ($eventObject->getId())
	{
		$result = $this->mapperFactory->getEvent()->update($eventObject, [
			'userId' => $connection->getOwner()->getId(),
			'bAffectToDav' => false, // Used to prevent synchro with calDav again
			'bSilentAccessMeeting' => true,
			'autoDetectSection' => false,
			'originalFrom' => $connection->getVendor()->getCode(),
		]);
	}
	else
	{
		$result = $this->mapperFactory->getEvent()->create($eventObject, [
			'userId' => $connection->getOwner()->getId(),
			'bAffectToDav' => false, // Used to prevent synchro with calDav again
			'bSilentAccessMeeting' => true,
			'autoDetectSection' => false,
			'originalFrom' => $connection->getVendor()->getCode(),
		]);
	}

	if ($result && $result->getId())
	{
		$data = [];
		// Prepare Data with outer params
		if (!empty($event['ATTENDEE']) || !empty($event['ORGANIZER_ENTITY']))
		{
			$this->parseInvitedAttendees($event, $data);
		}
		if (!empty($event['ATTACH']))
		{
			$this->parseAttachments($event, $data);
		}
		if (!empty($event['URL']))
		{
			$data['URL'] = $event['URL'];
		}

		if (!empty($additionalParams['EVENT_CONNECTION_ID']))
		{
			EventConnectionTable::update($additionalParams['EVENT_CONNECTION_ID'], [
				'SYNC_STATUS' => Dictionary::SYNC_STATUS['success'],
				'ENTITY_TAG' => $event['MODIFICATION_LABEL'] ?? null,
				'VERSION' => (string)($additionalParams['VERSION'] ?? null),
				'VENDOR_VERSION_ID' => (string)($additionalParams['VERSION'] ?? null),
				'DATA' => $data,
			]);
		}
		else
		{
			EventConnectionTable::add([
				'EVENT_ID' => (int)$result->getId(),
				'CONNECTION_ID' => $connection->getId(),
				'VENDOR_EVENT_ID' => $event['XML_ID'] ?? null,
				'SYNC_STATUS' => Dictionary::SYNC_STATUS['success'],
				'ENTITY_TAG' => $event['MODIFICATION_LABEL'] ?? null,
				'VERSION' => (string)($additionalParams['VERSION'] ?? null),
				'VENDOR_VERSION_ID' => (string)($additionalParams['VERSION'] ?? null),
				'DATA' => $data,
			]);
		}

		return (int)$result->getId();
	}

	return null;
}