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// Copyright (C) 2015 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 static com.google.common.base.Preconditions.checkState;
import static com.google.gerrit.server.change.HashtagsUtil.extractTags;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Ordering;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.extensions.api.changes.HashtagsInput;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.ChangeMessage;
import com.google.gerrit.server.ChangeMessagesUtil;
import com.google.gerrit.server.change.HashtagsUtil.InvalidHashtagException;
import com.google.gerrit.server.extensions.events.HashtagsEdited;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.notedb.ChangeUpdate;
import com.google.gerrit.server.notedb.NotesMigration;
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.validators.HashtagValidationListener;
import com.google.gerrit.server.validators.ValidationException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
public class SetHashtagsOp implements BatchUpdateOp {
public interface Factory {
SetHashtagsOp create(HashtagsInput input);
}
private final NotesMigration notesMigration;
private final ChangeMessagesUtil cmUtil;
private final DynamicSet<HashtagValidationListener> validationListeners;
private final HashtagsEdited hashtagsEdited;
private final HashtagsInput input;
private boolean fireEvent = true;
private Change change;
private Set<String> toAdd;
private Set<String> toRemove;
private ImmutableSortedSet<String> updatedHashtags;
@Inject
SetHashtagsOp(
NotesMigration notesMigration,
ChangeMessagesUtil cmUtil,
DynamicSet<HashtagValidationListener> validationListeners,
HashtagsEdited hashtagsEdited,
@Assisted @Nullable HashtagsInput input) {
this.notesMigration = notesMigration;
this.cmUtil = cmUtil;
this.validationListeners = validationListeners;
this.hashtagsEdited = hashtagsEdited;
this.input = input;
}
public SetHashtagsOp setFireEvent(boolean fireEvent) {
this.fireEvent = fireEvent;
return this;
}
@Override
public boolean updateChange(ChangeContext ctx)
throws AuthException, BadRequestException, MethodNotAllowedException, OrmException,
IOException {
if (!notesMigration.readChanges()) {
throw new MethodNotAllowedException("Cannot add hashtags; NoteDb is disabled");
}
if (input == null || (input.add == null && input.remove == null)) {
updatedHashtags = ImmutableSortedSet.of();
return false;
}
change = ctx.getChange();
ChangeUpdate update = ctx.getUpdate(change.currentPatchSetId());
ChangeNotes notes = update.getNotes().load();
try {
Set<String> existingHashtags = notes.getHashtags();
Set<String> updated = new HashSet<>();
toAdd = new HashSet<>(extractTags(input.add));
toRemove = new HashSet<>(extractTags(input.remove));
for (HashtagValidationListener validator : validationListeners) {
validator.validateHashtags(update.getChange(), toAdd, toRemove);
}
updated.addAll(existingHashtags);
toAdd.removeAll(existingHashtags);
toRemove.retainAll(existingHashtags);
if (updated()) {
updated.addAll(toAdd);
updated.removeAll(toRemove);
update.setHashtags(updated);
addMessage(ctx, update);
}
updatedHashtags = ImmutableSortedSet.copyOf(updated);
return true;
} catch (ValidationException | InvalidHashtagException e) {
throw new BadRequestException(e.getMessage());
}
}
private void addMessage(ChangeContext ctx, ChangeUpdate update) throws OrmException {
StringBuilder msg = new StringBuilder();
appendHashtagMessage(msg, "added", toAdd);
appendHashtagMessage(msg, "removed", toRemove);
ChangeMessage cmsg =
ChangeMessagesUtil.newMessage(ctx, msg.toString(), ChangeMessagesUtil.TAG_SET_HASHTAGS);
cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
}
private void appendHashtagMessage(StringBuilder b, String action, Set<String> hashtags) {
if (isNullOrEmpty(hashtags)) {
return;
}
if (b.length() > 0) {
b.append("\n");
}
b.append("Hashtag");
if (hashtags.size() > 1) {
b.append("s");
}
b.append(" ");
b.append(action);
b.append(": ");
b.append(Joiner.on(", ").join(Ordering.natural().sortedCopy(hashtags)));
}
@Override
public void postUpdate(Context ctx) throws OrmException {
if (updated() && fireEvent) {
hashtagsEdited.fire(
change, ctx.getAccount(), updatedHashtags, toAdd, toRemove, ctx.getWhen());
}
}
public ImmutableSortedSet<String> getUpdatedHashtags() {
checkState(updatedHashtags != null, "getUpdatedHashtags() only valid after executing op");
return updatedHashtags;
}
private boolean updated() {
return !isNullOrEmpty(toAdd) || !isNullOrEmpty(toRemove);
}
private static boolean isNullOrEmpty(Collection<?> coll) {
return coll == null || coll.isEmpty();
}
}
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