Stage::updateAction

public function updateAction(BitrixRpaModelStage $stage, array $fields, string $eventId = ''): ?array
{
	$isNew = (!($stage->getId() > 0));
	unset($fields['id']);
	if($stage->getId() > 0)
	{
		unset($fields['typeId']);
	}
	$converter = new Converter(Converter::TO_UPPER | Converter::KEYS | Converter::TO_SNAKE);
	$previousStageId = null;
	if(isset($fields['previousStageId']))
	{
		$previousStageId = (int) $fields['previousStageId'];
	}
	$fields = $converter->process($fields);
	foreach($fields as $name => $value)
	{
		if($stage->entity->hasField($name))
		{
			$stage->set($name, $value);
		}
	}
	if($previousStageId !== null)
	{
		$sort = $this->getSortByPreviousStageId($stage, $previousStageId);
		$stage->setSort($sort);
	}
	$result = $stage->save();
	if($result->isSuccess())
	{
		$permissionResult = $this->processPermissions($stage, $fields);
		$permissionResult = $this->savePermissions($stage, $permissionResult);
		if(!$permissionResult->isSuccess())
		{
			$this->addErrors($permissionResult->getErrors());
		}
		if(isset($fields['FIELDS']))
		{
			$fieldResult = FieldTable::mergeSettings($stage->getTypeId(), $stage->getId(), $fields['FIELDS']);
			if(!$fieldResult->isSuccess())
			{
				$this->addErrors($fieldResult->getErrors());
			}
		}
		if(isset($fields['POSSIBLE_NEXT_STAGES']))
		{
			if(!is_array($fields['POSSIBLE_NEXT_STAGES']))
			{
				$fields['POSSIBLE_NEXT_STAGES'] = [];
			}
			$possibleNextStagesResult = $this->processPossibleNextStages($stage, $fields['POSSIBLE_NEXT_STAGES']);
			if(!$possibleNextStagesResult->isSuccess())
			{
				$this->addErrors($possibleNextStagesResult->getErrors());
			}
		}
		$userPermissions = Driver::getInstance()->getUserPermissions();
		$userPermissions->loadUserPermissions();

		if($isNew)
		{
			$stage->getType()->getStages()->add($stage);
			Driver::getInstance()->getPullManager()->sendStageAddedEvent($stage, $eventId);
		}
		else
		{
			Driver::getInstance()->getPullManager()->sendStageUpdatedEvent($stage, $eventId);
		}

		if($previousStageId !== null)
		{
			$stage->getType()->resortStages();
		}

		return $this->getAction($stage);
	}
	else
	{
		$this->addErrors($result->getErrors());
		return null;
	}
}