Backlog::updateAction

public function updateAction(int $id, array $fields)
{
	$id = (int) $id;
	if (!$id)
	{
		$this->errorCollection->add([new Error('Backlog id not found')]);

		return null;
	}

	$entityService = new EntityService();
	$backlogService = new BacklogService();

	$backlog = $entityService->getEntityById($id);

	if ($backlog->isEmpty())
	{
		$this->errorCollection->add([new Error('Backlog not found')]);

		return null;
	}

	if ($backlog->getEntityType() !== EntityForm::BACKLOG_TYPE)
	{
		$this->errorCollection->add([new Error('Backlog not found')]);

		return null;
	}

	if (!$this->checkAccess($backlog->getGroupId()))
	{
		$this->errorCollection->add([new Error('Access denied')]);

		return null;
	}

	if (array_key_exists('groupId', $fields) && is_numeric($fields['groupId']))
	{
		$groupId = (int) $fields['groupId'];
		$itemService = new ItemService();

		$isGroupUpdatingAction = ($backlog->getGroupId() !== $groupId);
		$hasBacklogItems = (!empty($itemService->getItemIdsByEntityId($backlog->getId())));

		if ($isGroupUpdatingAction)
		{
			if ($hasBacklogItems)
			{
				$this->errorCollection->add([new Error('It is forbidden move a backlog with items')]);

				return null;
			}

			$targetBacklog = $backlogService->getBacklogByGroupId($groupId);
			if (!$targetBacklog->isEmpty())
			{
				$this->errorCollection->add([new Error('The target group already has a backlog')]);

				return null;
			}
		}

		$backlog->setGroupId($groupId);
	}

	if (array_key_exists('createdBy', $fields) && is_numeric($fields['createdBy']))
	{
		$createdBy = (int) $fields['createdBy'];
		if (!$this->existsUser($createdBy))
		{
			$this->errorCollection->add([new Error('createdBy user not found')]);

			return null;
		}

		$backlog->setCreatedBy($createdBy);
	}

	$modifiedBy = 0;
	if (array_key_exists('modifiedBy', $fields) && is_numeric($fields['modifiedBy']))
	{
		$modifiedBy = (int) $fields['modifiedBy'];
		if (!$this->existsUser($modifiedBy))
		{
			$this->errorCollection->add([new Error('modifiedBy user not found')]);

			return null;
		}
	}
	$backlog->setModifiedBy($modifiedBy ?? $this->getUserId());

	$backlogService->changeBacklog($backlog);

	if (!empty($backlogService->getErrors()))
	{
		$this->errorCollection->add([new Error('Unable to update backlog')]);

		return null;
	}

	return [
		'id' => $backlog->getId(),
		'groupId' => $backlog->getGroupId(),
		'createdBy' => $backlog->getCreatedBy(),
		'modifiedBy' => $backlog->getModifiedBy(),
	];
}