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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.restapi.change;
import static com.google.gerrit.server.mail.EmailFactories.CHANGE_RESTORED;
import static com.google.gerrit.server.project.ProjectCache.illegalState;
import static com.google.gerrit.server.update.context.RefUpdateContext.RefUpdateType.CHANGE_MODIFICATION;
import com.google.common.base.Strings;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Change.Status;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.extensions.api.changes.RestoreInput;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.extensions.webui.UiAction;
import com.google.gerrit.server.ChangeMessagesUtil;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.change.ChangeJson;
import com.google.gerrit.server.change.ChangeResource;
import com.google.gerrit.server.extensions.events.ChangeRestored;
import com.google.gerrit.server.mail.EmailFactories;
import com.google.gerrit.server.mail.send.ChangeEmail;
import com.google.gerrit.server.mail.send.MessageIdGenerator;
import com.google.gerrit.server.mail.send.OutgoingEmail;
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.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
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.PostUpdateContext;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.update.context.RefUpdateContext;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
@Singleton
public class Restore
implements RestModifyView<ChangeResource, RestoreInput>, UiAction<ChangeResource> {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final BatchUpdate.Factory updateFactory;
private final EmailFactories emailFactories;
private final ChangeJson.Factory json;
private final ChangeMessagesUtil cmUtil;
private final PatchSetUtil psUtil;
private final ChangeRestored changeRestored;
private final ProjectCache projectCache;
private final MessageIdGenerator messageIdGenerator;
@Inject
Restore(
BatchUpdate.Factory updateFactory,
EmailFactories emailFactories,
ChangeJson.Factory json,
ChangeMessagesUtil cmUtil,
PatchSetUtil psUtil,
ChangeRestored changeRestored,
ProjectCache projectCache,
MessageIdGenerator messageIdGenerator) {
this.updateFactory = updateFactory;
this.emailFactories = emailFactories;
this.json = json;
this.cmUtil = cmUtil;
this.psUtil = psUtil;
this.changeRestored = changeRestored;
this.projectCache = projectCache;
this.messageIdGenerator = messageIdGenerator;
}
@Override
public Response<ChangeInfo> apply(ChangeResource rsrc, RestoreInput input)
throws RestApiException, UpdateException, PermissionBackendException, IOException {
// Not allowed to restore if the current patch set is locked.
psUtil.checkPatchSetNotLocked(rsrc.getNotes());
rsrc.permissions().check(ChangePermission.RESTORE);
projectCache
.get(rsrc.getProject())
.orElseThrow(illegalState(rsrc.getProject()))
.checkStatePermitsWrite();
Op op = new Op(input);
try (RefUpdateContext ctx = RefUpdateContext.open(CHANGE_MODIFICATION)) {
try (BatchUpdate u =
updateFactory.create(rsrc.getChange().getProject(), rsrc.getUser(), TimeUtil.now())) {
u.addOp(rsrc.getId(), op).execute();
}
return Response.ok(json.noOptions().format(op.change));
}
}
private class Op implements BatchUpdateOp {
private final RestoreInput input;
private Change change;
private PatchSet patchSet;
private String mailMessage;
private Op(RestoreInput input) {
this.input = input;
}
@Override
public boolean updateChange(ChangeContext ctx) throws ResourceConflictException {
change = ctx.getChange();
if (change == null || !change.isAbandoned()) {
throw new ResourceConflictException("change is " + ChangeUtil.status(change));
}
PatchSet.Id psId = change.currentPatchSetId();
ChangeUpdate update = ctx.getUpdate(psId);
patchSet = psUtil.get(ctx.getNotes(), psId);
change.setStatus(Status.NEW);
change.setLastUpdatedOn(ctx.getWhen());
update.setStatus(change.getStatus());
mailMessage = cmUtil.setChangeMessage(ctx, commentMessage(), ChangeMessagesUtil.TAG_RESTORE);
return true;
}
private String commentMessage() {
StringBuilder msg = new StringBuilder();
msg.append("Restored");
if (!Strings.nullToEmpty(input.message).trim().isEmpty()) {
msg.append("\n\n");
msg.append(input.message.trim());
}
return msg.toString();
}
@Override
public void postUpdate(PostUpdateContext ctx) {
try {
ChangeEmail changeEmail =
emailFactories.createChangeEmail(
ctx.getProject(), change.getId(), emailFactories.createRestoredChangeEmail());
changeEmail.setChangeMessage(mailMessage, ctx.getWhen());
OutgoingEmail outgoingEmail =
emailFactories.createOutgoingEmail(CHANGE_RESTORED, changeEmail);
outgoingEmail.setFrom(ctx.getAccountId());
outgoingEmail.setMessageId(
messageIdGenerator.fromChangeUpdate(ctx.getRepoView(), change.currentPatchSetId()));
outgoingEmail.send();
} catch (Exception e) {
logger.atSevere().withCause(e).log("Cannot email update for change %s", change.getId());
}
changeRestored.fire(
ctx.getChangeData(change),
patchSet,
ctx.getAccount(),
Strings.emptyToNull(input.message),
ctx.getWhen());
}
}
@Override
public UiAction.Description getDescription(ChangeResource rsrc) throws IOException {
UiAction.Description description =
new UiAction.Description()
.setLabel("Restore")
.setTitle("Restore the change")
.setVisible(false);
Change change = rsrc.getChange();
if (!change.isAbandoned()) {
return description;
}
if (!projectCache.get(rsrc.getProject()).map(ProjectState::statePermitsRead).orElse(false)) {
return description;
}
if (psUtil.isPatchSetLocked(rsrc.getNotes())) {
return description;
}
boolean visible = rsrc.permissions().testOrFalse(ChangePermission.RESTORE);
return description.setVisible(visible);
}
}