// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.change;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.google.gerrit.extensions.common.FileInfo;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.CacheControl;
import com.google.gerrit.extensions.restapi.ChildCollection;
import com.google.gerrit.extensions.restapi.IdString;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.extensions.restapi.RestView;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.AccountPatchReview;
import com.google.gerrit.reviewdb.client.Patch;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.patch.PatchList;
import com.google.gerrit.server.patch.PatchListCache;
import com.google.gerrit.server.patch.PatchListNotAvailableException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
import org.kohsuke.args4j.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.concurrent.TimeUnit;
public class Files implements ChildCollection<RevisionResource, FileResource> {
private final DynamicMap<RestView<FileResource>> views;
private final Provider<ListFiles> list;
@Inject
Files(DynamicMap<RestView<FileResource>> views, Provider<ListFiles> list) {
this.views = views;
this.list = list;
}
@Override
public DynamicMap<RestView<FileResource>> views() {
return views;
}
@Override
public RestView<RevisionResource> list() throws AuthException {
return list.get();
}
@Override
public FileResource parse(RevisionResource rev, IdString id)
throws ResourceNotFoundException, OrmException, AuthException {
return new FileResource(rev, id.get());
}
public static final class ListFiles implements RestReadView<RevisionResource> {
private static final Logger log = LoggerFactory.getLogger(ListFiles.class);
@Option(name = "--base", metaVar = "revision-id")
String base;
@Option(name = "--reviewed")
boolean reviewed;
private final Provider<ReviewDb> db;
private final Provider<CurrentUser> self;
private final FileInfoJson fileInfoJson;
private final Revisions revisions;
private final GitRepositoryManager gitManager;
private final PatchListCache patchListCache;
@Inject
ListFiles(Provider<ReviewDb> db,
Provider<CurrentUser> self,
FileInfoJson fileInfoJson,
Revisions revisions,
GitRepositoryManager gitManager,
PatchListCache patchListCache) {
this.db = db;
this.self = self;
this.fileInfoJson = fileInfoJson;
this.revisions = revisions;
this.gitManager = gitManager;
this.patchListCache = patchListCache;
}
public ListFiles setReviewed(boolean r) {
this.reviewed = r;
return this;
}
@Override
public Response<?> apply(RevisionResource resource) throws AuthException,
BadRequestException, ResourceNotFoundException, OrmException {
if (base != null && reviewed) {
throw new BadRequestException("cannot combine base and reviewed");
} else if (reviewed) {
return Response.ok(reviewed(resource));
}
PatchSet basePatchSet = null;
if (base != null) {
RevisionResource baseResource = revisions.parse(
resource.getChangeResource(), IdString.fromDecoded(base));
basePatchSet = baseResource.getPatchSet();
}
try {
Response<Map<String, FileInfo>> r = Response.ok(fileInfoJson.toFileInfoMap(
resource.getChange(),
resource.getPatchSet(),
basePatchSet));
if (resource.isCacheable()) {
r.caching(CacheControl.PRIVATE(7, TimeUnit.DAYS));
}
return r;
} catch (PatchListNotAvailableException e) {
throw new ResourceNotFoundException(e.getMessage());
}
}
private List<String> reviewed(RevisionResource resource)
throws AuthException, OrmException {
CurrentUser user = self.get();
if (!(user.isIdentifiedUser())) {
throw new AuthException("Authentication required");
}
Account.Id userId = ((IdentifiedUser) user).getAccountId();
List<String> r = scan(userId, resource.getPatchSet().getId());
if (r.isEmpty() && 1 < resource.getPatchSet().getPatchSetId()) {
for (Integer id : reverseSortPatchSets(resource)) {
PatchSet.Id old = new PatchSet.Id(resource.getChange().getId(), id);
List<String> o = scan(userId, old);
if (!o.isEmpty()) {
try {
r = copy(Sets.newHashSet(o), old, resource, userId);
} catch (IOException | PatchListNotAvailableException e) {
log.warn("Cannot copy patch review flags", e);
}
break;
}
}
}
return r;
}
private List<String> scan(Account.Id userId, PatchSet.Id psId)
throws OrmException {
List<String> r = Lists.newArrayList();
for (AccountPatchReview w : db.get().accountPatchReviews()
.byReviewer(userId, psId)) {
r.add(w.getKey().getPatchKey().getFileName());
}
return r;
}
private List<Integer> reverseSortPatchSets(
RevisionResource resource) throws OrmException {
SortedSet<Integer> ids = Sets.newTreeSet();
for (PatchSet p : db.get().patchSets()
.byChange(resource.getChange().getId())) {
if (p.getPatchSetId() < resource.getPatchSet().getPatchSetId()) {
ids.add(p.getPatchSetId());
}
}
List<Integer> r = Lists.newArrayList(ids);
Collections.reverse(r);
return r;
}
private List<String> copy(Set<String> paths, PatchSet.Id old,
RevisionResource resource, Account.Id userId) throws IOException,
PatchListNotAvailableException, OrmException {
Repository git =
gitManager.openRepository(resource.getChange().getProject());
try {
ObjectReader reader = git.newObjectReader();
try {
PatchList oldList = patchListCache.get(
resource.getChange(),
db.get().patchSets().get(old));
PatchList curList = patchListCache.get(
resource.getChange(),
resource.getPatchSet());
int sz = paths.size();
List<AccountPatchReview> inserts = Lists.newArrayListWithCapacity(sz);
List<String> pathList = Lists.newArrayListWithCapacity(sz);
RevWalk rw = new RevWalk(reader);
TreeWalk tw = new TreeWalk(reader);
tw.setFilter(PathFilterGroup.createFromStrings(paths));
tw.setRecursive(true);
int o = tw.addTree(rw.parseCommit(oldList.getNewId()).getTree());
int c = tw.addTree(rw.parseCommit(curList.getNewId()).getTree());
int op = -1;
if (oldList.getOldId() != null) {
op = tw.addTree(rw.parseTree(oldList.getOldId()));
}
int cp = -1;
if (curList.getOldId() != null) {
cp = tw.addTree(rw.parseTree(curList.getOldId()));
}
while (tw.next()) {
String path = tw.getPathString();
if (tw.getRawMode(o) != 0 && tw.getRawMode(c) != 0
&& tw.idEqual(o, c)
&& paths.contains(path)) {
// File exists in previously reviewed oldList and in curList.
// File content is identical.
inserts.add(new AccountPatchReview(
new Patch.Key(
resource.getPatchSet().getId(),
path),
userId));
pathList.add(path);
} else if (op >= 0 && cp >= 0
&& tw.getRawMode(o) == 0 && tw.getRawMode(c) == 0
&& tw.getRawMode(op) != 0 && tw.getRawMode(cp) != 0
&& tw.idEqual(op, cp)
&& paths.contains(path)) {
// File was deleted in previously reviewed oldList and curList.
// File exists in ancestor of oldList and curList.
// File content is identical in ancestors.
inserts.add(new AccountPatchReview(
new Patch.Key(
resource.getPatchSet().getId(),
path),
userId));
pathList.add(path);
}
}
db.get().accountPatchReviews().insert(inserts);
return pathList;
} finally {
reader.release();
}
} finally {
git.close();
}
}
}
}