FromTask::produceSub

public function produceSub($source, $destination, array $parameters = array(), $userId = 0)
{
	$result = new Result();

	Task::enterBatchState();

	if(!$userId)
	{
		$userId = User::getId();
	}

	$source = $this->getSourceInstance($source, $userId);
	$destination = $this->getDestinationInstance($destination, $userId);
	$created = new Collection();

	$data = $this->getSubItemData($source->getId(), $result, $userId);
	if($result->isSuccess() && !empty($data)) // has sub-tasks
	{
		$srcToDst = array($source->getId() => $destination->getId());
		$notSaved = array();

		foreach($data['TREE'] as $childId => $parentId)
		{
			if(!isset($parameters['COPY_DESTINATION_ITEM']) && $childId == $destination->getId()) // do not copy self one more time as a sub-task
			{
				continue;
			}

			if(isset($notSaved[$parentId])) // if parent was not saved, child can not be saved too
			{
				$notSaved[$childId] = true;
				continue;
			}

			$saveResult = $this->saveItemFromSource($data['DATA'][$childId], ['PARENT_ID' => $srcToDst[$parentId]], $userId);

			if($saveResult->isSuccess())
			{
				$srcToDst[$childId] = $saveResult->getInstance()->getId();
			}
			else
			{
				$notSaved[$childId] = true;
			}

			$created->push($saveResult);
		}

		if(!empty($notSaved))
		{
			$result->addError('SUB_ITEMS_CREATION_FAILURE', 'Some of the sub-tasks was not properly created');
		}
	}

	Task::leaveBatchState();

	$result->setData($created);

	return $result;
}