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/*
* This file is part of vospace-rest
* Copyright (C) 2021 Istituto Nazionale di Astrofisica
* SPDX-License-Identifier: GPL-3.0-or-later
*/
package it.inaf.oats.vospace;
import it.inaf.ia2.aa.data.User;
import it.inaf.oats.vospace.datamodel.NodeUtils;
import it.inaf.oats.vospace.exception.InternalFaultException;
import it.inaf.oats.vospace.exception.NodeBusyException;
import it.inaf.oats.vospace.exception.NodeNotFoundException;
import it.inaf.oats.vospace.exception.PermissionDeniedException;
import it.inaf.oats.vospace.persistence.NodeDAO;
import it.inaf.oats.vospace.persistence.NodeDAO.ShortNodeDescriptor;
import javax.servlet.http.HttpServletRequest;
import net.ivoa.xml.vospace.v2.Transfer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.dao.CannotSerializeTransactionException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Transactional;
@Service
public class MoveService {
@Autowired
private NodeDAO nodeDao;
@Value("${vospace-authority}")
private String authority;
@Autowired
private HttpServletRequest servletRequest;
@Transactional(rollbackFor = { Exception.class }, isolation = Isolation.REPEATABLE_READ)
public void processMoveJob(Transfer transfer) {
// Get Source Vos Path
String sourcePath = transfer.getTarget().substring("vos://".length() + authority.length());
// Get Destination Vos Path (it's in transfer direction)
String destinationPath = transfer.getDirection().substring("vos://".length() + authority.length());
// Extract User permissions from servlet request
User user = (User) servletRequest.getUserPrincipal();
// Generic common validation for move process job paths
this.validatePath(sourcePath);
this.validatePath(destinationPath);
if (sourcePath.equals(destinationPath)) {
return;
// Check if destination is subpath of source
// Linux-like: "cannot move to a subdirectory of itself"
if(destinationPath.startsWith(sourcePath+"/")) {
throw new IllegalArgumentException("Cannot move node to a subdirectory of its own path");
}
try {
// Get source node
Optional<Long> sourceIdOpt = nodeDao.getNodeId(sourcePath);
long sourceId = sourceIdOpt.orElseThrow(() -> new NodeNotFoundException(sourcePath));
if (nodeDao.isBranchBusy(sourceId)) {
throw new NodeBusyException(sourcePath);
}
if (!nodeDao.isBranchWritable(sourceId, user.getName(), user.getGroups())) {
throw new PermissionDeniedException(sourcePath);
Optional<ShortNodeDescriptor> destShortNodeDescriptor
= nodeDao.getShortNodeDescriptor(destinationPath, user.getName(), user.getGroups());
String destinationNodeLtreePath = null;
if (destShortNodeDescriptor.isPresent()) {
// When the destination is an existing ContainerNode, the source SHALL be placed under it (i.e., within the container)
ShortNodeDescriptor snd = destShortNodeDescriptor.get();
if(snd.isBusy()) throw new NodeBusyException(destinationPath);
if(snd.isPermissionDenied()) throw new PermissionDeniedException(destinationPath);
if(!snd.isWritable()) throw new InternalFaultException("Destination is not writable: "+ destinationPath);
if(!snd.isContainer()) throw new InternalFaultException("Existing destination is not a container: " + destinationPath);
destinationNodeLtreePath = snd.getDestinationNodeLtreePath();
// Compare source and destination paths parents and see if it's just a rename
if (NodeUtils.getParentPath(sourcePath)
.equals(NodeUtils.getParentPath(destinationPath))) {
nodeDao.renameNode(sourceId, NodeUtils.getLastPathElement(destinationPath));
} else {
// TODO (if we want this): modify the return type of createDestination to obtain an ltree path
//parentDestLtree = this.createDestination(NodeUtils.getParentPath(destinationPath), user);
}
if (destinationNodeLtreePath != null) {
nodeDao.moveNodeBranch(sourceId, destinationNodeLtreePath);
} catch (CannotSerializeTransactionException ex) {
// Concurrent transactions attempted to modify this set of nodes
throw new NodeBusyException(sourcePath);
}
private void validatePath(String path) {
if (path.equals("/")) {
throw new IllegalArgumentException("Cannot move root node or to root node");
}
// Returns node id of created destination
private Long createDestination(String path, User user) {
List<String> components = NodeUtils.subPathComponents(path);
for (int i = 0; i < components.size(); i++) {
if (!this.checkNodeExistence(components.get(i))) {
ContainerNode node = new ContainerNode();
node.setUri("vos://" + this.authority + components.get(i));
createNodeController.createNode(node, user);
}
}
return nodeDao.getNodeId(path).orElseThrow(()->
new InternalFaultException("Unable to create destination at path: "+path));