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// 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.restapi.change;
import static java.util.stream.Collectors.toSet;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.extensions.api.changes.RelatedChangeAndCommitInfo;
import com.google.gerrit.extensions.api.changes.RelatedChangesInfo;
import com.google.gerrit.extensions.common.CommitInfo;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.index.IndexConfig;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.CommonConverters;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.change.RevisionResource;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.project.NoSuchProjectException;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.revwalk.RevCommit;
@Singleton
public class GetRelated implements RestReadView<RevisionResource> {
private final Provider<ReviewDb> db;
private final Provider<InternalChangeQuery> queryProvider;
private final PatchSetUtil psUtil;
private final RelatedChangesSorter sorter;
private final IndexConfig indexConfig;
@Inject
GetRelated(
Provider<ReviewDb> db,
Provider<InternalChangeQuery> queryProvider,
PatchSetUtil psUtil,
RelatedChangesSorter sorter,
IndexConfig indexConfig) {
this.db = db;
this.queryProvider = queryProvider;
this.psUtil = psUtil;
this.sorter = sorter;
this.indexConfig = indexConfig;
}
@Override
public RelatedChangesInfo apply(RevisionResource rsrc)
throws RepositoryNotFoundException, IOException, OrmException, NoSuchProjectException,
PermissionBackendException {
RelatedChangesInfo relatedChangesInfo = new RelatedChangesInfo();
relatedChangesInfo.changes = getRelated(rsrc);
return relatedChangesInfo;
}
private List<RelatedChangeAndCommitInfo> getRelated(RevisionResource rsrc)
throws OrmException, IOException, PermissionBackendException {
Set<String> groups = getAllGroups(rsrc.getNotes(), db.get(), psUtil);
if (groups.isEmpty()) {
return Collections.emptyList();
}
List<ChangeData> cds =
InternalChangeQuery.byProjectGroups(
queryProvider, indexConfig, rsrc.getChange().getProject(), groups);
if (cds.isEmpty()) {
return Collections.emptyList();
}
if (cds.size() == 1 && cds.get(0).getId().equals(rsrc.getChange().getId())) {
return Collections.emptyList();
}
List<RelatedChangeAndCommitInfo> result = new ArrayList<>(cds.size());
boolean isEdit = rsrc.getEdit().isPresent();
PatchSet basePs = isEdit ? rsrc.getEdit().get().getBasePatchSet() : rsrc.getPatchSet();
reloadChangeIfStale(cds, basePs);
for (RelatedChangesSorter.PatchSetData d : sorter.sort(cds, basePs)) {
PatchSet ps = d.patchSet();
RevCommit commit;
if (isEdit && ps.getId().equals(basePs.getId())) {
// Replace base of an edit with the edit itself.
ps = rsrc.getPatchSet();
commit = rsrc.getEdit().get().getEditCommit();
} else {
commit = d.commit();
}
result.add(newChangeAndCommit(rsrc.getProject(), d.data().change(), ps, commit));
}
if (result.size() == 1) {
RelatedChangeAndCommitInfo r = result.get(0);
if (r.commit != null && r.commit.commit.equals(rsrc.getPatchSet().getRevision().get())) {
return Collections.emptyList();
}
}
return result;
}
@VisibleForTesting
public static Set<String> getAllGroups(ChangeNotes notes, ReviewDb db, PatchSetUtil psUtil)
throws OrmException {
return psUtil.byChange(db, notes).stream()
.flatMap(ps -> ps.getGroups().stream())
.collect(toSet());
}
private void reloadChangeIfStale(List<ChangeData> cds, PatchSet wantedPs) throws OrmException {
for (ChangeData cd : cds) {
if (cd.getId().equals(wantedPs.getId().getParentKey())) {
if (cd.patchSet(wantedPs.getId()) == null) {
cd.reloadChange();
}
}
}
}
static RelatedChangeAndCommitInfo newChangeAndCommit(
Project.NameKey project, @Nullable Change change, @Nullable PatchSet ps, RevCommit c) {
RelatedChangeAndCommitInfo info = new RelatedChangeAndCommitInfo();
info.project = project.get();
if (change != null) {
info.changeId = change.getKey().get();
info._changeNumber = change.getChangeId();
info._revisionNumber = ps != null ? ps.getPatchSetId() : null;
PatchSet.Id curr = change.currentPatchSetId();
info._currentRevisionNumber = curr != null ? curr.get() : null;
info.status = change.getStatus().asChangeStatus().toString();
}
info.commit = new CommitInfo();
info.commit.commit = c.name();
info.commit.parents = Lists.newArrayListWithCapacity(c.getParentCount());
for (int i = 0; i < c.getParentCount(); i++) {
CommitInfo p = new CommitInfo();
p.commit = c.getParent(i).name();
info.commit.parents.add(p);
}
info.commit.author = CommonConverters.toGitPerson(c.getAuthorIdent());
info.commit.subject = c.getShortMessage();
return info;
}
}
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