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// Copyright (C) 2017 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.base.Strings;
import com.google.gerrit.common.TimeUtil;
import com.google.gerrit.extensions.api.changes.DeleteCommentInput;
import com.google.gerrit.extensions.common.CommentInfo;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.reviewdb.client.Comment;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.CommentsUtil;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.update.BatchUpdate;
import com.google.gerrit.server.update.BatchUpdateOp;
import com.google.gerrit.server.update.ChangeContext;
import com.google.gerrit.server.update.RetryHelper;
import com.google.gerrit.server.update.RetryingRestModifyView;
import com.google.gerrit.server.update.UpdateException;
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.List;
import java.util.Optional;
import org.eclipse.jgit.errors.ConfigInvalidException;
@Singleton
public class DeleteComment
extends RetryingRestModifyView<CommentResource, DeleteCommentInput, CommentInfo> {
private final Provider<CurrentUser> userProvider;
private final Provider<ReviewDb> dbProvider;
private final PermissionBackend permissionBackend;
private final CommentsUtil commentsUtil;
private final Provider<CommentJson> commentJson;
private final ChangeNotes.Factory notesFactory;
@Inject
public DeleteComment(
Provider<CurrentUser> userProvider,
Provider<ReviewDb> dbProvider,
PermissionBackend permissionBackend,
RetryHelper retryHelper,
CommentsUtil commentsUtil,
Provider<CommentJson> commentJson,
ChangeNotes.Factory notesFactory) {
super(retryHelper);
this.userProvider = userProvider;
this.dbProvider = dbProvider;
this.permissionBackend = permissionBackend;
this.commentsUtil = commentsUtil;
this.commentJson = commentJson;
this.notesFactory = notesFactory;
}
@Override
public CommentInfo applyImpl(
BatchUpdate.Factory batchUpdateFactory, CommentResource rsrc, DeleteCommentInput input)
throws RestApiException, IOException, ConfigInvalidException, OrmException,
PermissionBackendException, UpdateException {
CurrentUser user = userProvider.get();
permissionBackend.user(user).check(GlobalPermission.ADMINISTRATE_SERVER);
if (input == null) {
input = new DeleteCommentInput();
}
String newMessage = getCommentNewMessage(user.asIdentifiedUser().getName(), input.reason);
DeleteCommentOp deleteCommentOp = new DeleteCommentOp(rsrc, newMessage);
try (BatchUpdate batchUpdate =
batchUpdateFactory.create(
dbProvider.get(), rsrc.getRevisionResource().getProject(), user, TimeUtil.nowTs())) {
batchUpdate.addOp(rsrc.getRevisionResource().getChange().getId(), deleteCommentOp).execute();
}
ChangeNotes updatedNotes =
notesFactory.createChecked(rsrc.getRevisionResource().getChange().getId());
List<Comment> changeComments = commentsUtil.publishedByChange(dbProvider.get(), updatedNotes);
Optional<Comment> updatedComment =
changeComments.stream().filter(c -> c.key.equals(rsrc.getComment().key)).findFirst();
if (!updatedComment.isPresent()) {
// This should not happen as this endpoint should not remove the whole comment.
throw new ResourceNotFoundException("comment not found: " + rsrc.getComment().key);
}
return commentJson.get().newCommentFormatter().format(updatedComment.get());
}
private static String getCommentNewMessage(String name, String reason) {
StringBuilder stringBuilder = new StringBuilder("Comment removed by: ").append(name);
if (!Strings.isNullOrEmpty(reason)) {
stringBuilder.append("; Reason: ").append(reason);
}
return stringBuilder.toString();
}
private class DeleteCommentOp implements BatchUpdateOp {
private final CommentResource rsrc;
private final String newMessage;
DeleteCommentOp(CommentResource rsrc, String newMessage) {
this.rsrc = rsrc;
this.newMessage = newMessage;
}
@Override
public boolean updateChange(ChangeContext ctx)
throws ResourceConflictException, OrmException, ResourceNotFoundException {
PatchSet.Id psId = ctx.getChange().currentPatchSetId();
commentsUtil.deleteCommentByRewritingHistory(
ctx.getDb(),
ctx.getUpdate(psId),
rsrc.getComment().key,
rsrc.getPatchSet().getId(),
newMessage);
return true;
}
}
}
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