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// Copyright (C) 2012 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.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.DefaultInput;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.webui.UiAction;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.ChangeMessage;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.ChangeMessagesUtil;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.change.PutTopic.Input;
import com.google.gerrit.server.extensions.events.TopicEdited;
import com.google.gerrit.server.notedb.ChangeUpdate;
import com.google.gerrit.server.permissions.ChangePermission;
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.Context;
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;
@Singleton
public class PutTopic extends RetryingRestModifyView<ChangeResource, Input, Response<String>>
implements UiAction<ChangeResource> {
private final Provider<ReviewDb> dbProvider;
private final ChangeMessagesUtil cmUtil;
private final TopicEdited topicEdited;
public static class Input {
@DefaultInput public String topic;
}
@Inject
PutTopic(
Provider<ReviewDb> dbProvider,
ChangeMessagesUtil cmUtil,
RetryHelper retryHelper,
TopicEdited topicEdited) {
super(retryHelper);
this.dbProvider = dbProvider;
this.cmUtil = cmUtil;
this.topicEdited = topicEdited;
}
@Override
protected Response<String> applyImpl(
BatchUpdate.Factory updateFactory, ChangeResource req, Input input)
throws UpdateException, RestApiException, PermissionBackendException {
req.permissions().check(ChangePermission.EDIT_TOPIC_NAME);
if (input != null
&& input.topic != null
&& input.topic.length() > ChangeUtil.TOPIC_MAX_LENGTH) {
throw new BadRequestException(
String.format("topic length exceeds the limit (%s)", ChangeUtil.TOPIC_MAX_LENGTH));
}
Op op = new Op(input != null ? input : new Input());
try (BatchUpdate u =
updateFactory.create(
dbProvider.get(), req.getChange().getProject(), req.getUser(), TimeUtil.nowTs())) {
u.addOp(req.getId(), op);
u.execute();
}
return Strings.isNullOrEmpty(op.newTopicName) ? Response.none() : Response.ok(op.newTopicName);
}
private class Op implements BatchUpdateOp {
private final Input input;
private Change change;
private String oldTopicName;
private String newTopicName;
Op(Input input) {
this.input = input;
}
@Override
public boolean updateChange(ChangeContext ctx) throws OrmException {
change = ctx.getChange();
ChangeUpdate update = ctx.getUpdate(change.currentPatchSetId());
newTopicName = Strings.nullToEmpty(input.topic);
oldTopicName = Strings.nullToEmpty(change.getTopic());
if (oldTopicName.equals(newTopicName)) {
return false;
}
String summary;
if (oldTopicName.isEmpty()) {
summary = "Topic set to " + newTopicName;
} else if (newTopicName.isEmpty()) {
summary = "Topic " + oldTopicName + " removed";
} else {
summary = String.format("Topic changed from %s to %s", oldTopicName, newTopicName);
}
change.setTopic(Strings.emptyToNull(newTopicName));
update.setTopic(change.getTopic());
ChangeMessage cmsg =
ChangeMessagesUtil.newMessage(ctx, summary, ChangeMessagesUtil.TAG_SET_TOPIC);
cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
return true;
}
@Override
public void postUpdate(Context ctx) {
if (change != null) {
topicEdited.fire(change, ctx.getAccount(), oldTopicName, ctx.getWhen());
}
}
}
@Override
public UiAction.Description getDescription(ChangeResource rsrc) {
return new UiAction.Description()
.setLabel("Edit Topic")
.setVisible(rsrc.permissions().testCond(ChangePermission.EDIT_TOPIC_NAME));
}
}
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