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// Copyright (C) 2018 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.group.db;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import com.google.common.collect.Streams;
import com.google.gerrit.server.group.InternalGroup;
import java.util.Optional;
import java.util.Set;
import java.util.StringJoiner;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.stream.Stream;
import org.eclipse.jgit.revwalk.FooterKey;
/**
* A parsable commit message for a NoteDb commit of a group.
*
* <p>For group creations, it's sufficient to simply call the constructor of this class. For
* updates, {@link #setOriginalGroup(InternalGroup)} has to be called as well.
*/
class GroupConfigCommitMessage {
static final FooterKey FOOTER_ADD_MEMBER = new FooterKey("Add");
static final FooterKey FOOTER_REMOVE_MEMBER = new FooterKey("Remove");
static final FooterKey FOOTER_ADD_GROUP = new FooterKey("Add-group");
static final FooterKey FOOTER_REMOVE_GROUP = new FooterKey("Remove-group");
private final AuditLogFormatter auditLogFormatter;
private final InternalGroup updatedGroup;
private Optional<InternalGroup> originalGroup = Optional.empty();
GroupConfigCommitMessage(AuditLogFormatter auditLogFormatter, InternalGroup updatedGroup) {
this.auditLogFormatter = auditLogFormatter;
this.updatedGroup = updatedGroup;
}
public void setOriginalGroup(InternalGroup originalGroup) {
this.originalGroup = Optional.of(originalGroup);
}
public String create() {
String summaryLine = originalGroup.isPresent() ? "Update group" : "Create group";
StringJoiner footerJoiner = new StringJoiner("\n", "\n\n", "");
footerJoiner.setEmptyValue("");
Streams.concat(
Streams.stream(getFooterForRename()),
getFootersForMemberModifications(),
getFootersForSubgroupModifications())
.sorted()
.forEach(footerJoiner::add);
String footer = footerJoiner.toString();
return summaryLine + footer;
}
private Optional<String> getFooterForRename() {
if (!originalGroup.isPresent()) {
return Optional.empty();
}
String originalName = originalGroup.get().getName();
String newName = updatedGroup.getName();
if (originalName.equals(newName)) {
return Optional.empty();
}
return Optional.of("Rename from " + originalName + " to " + newName);
}
private Stream<String> getFootersForMemberModifications() {
return getFooters(
InternalGroup::getMembers,
AuditLogFormatter::getParsableAccount,
FOOTER_ADD_MEMBER,
FOOTER_REMOVE_MEMBER);
}
private Stream<String> getFootersForSubgroupModifications() {
return getFooters(
InternalGroup::getSubgroups,
AuditLogFormatter::getParsableGroup,
FOOTER_ADD_GROUP,
FOOTER_REMOVE_GROUP);
}
private <T> Stream<String> getFooters(
Function<InternalGroup, Set<T>> getElements,
BiFunction<AuditLogFormatter, T, String> toParsableString,
FooterKey additionFooterKey,
FooterKey removalFooterKey) {
Set<T> oldElements = originalGroup.map(getElements).orElseGet(ImmutableSet::of);
Set<T> newElements = getElements.apply(updatedGroup);
Function<T, String> toString = element -> toParsableString.apply(auditLogFormatter, element);
Stream<String> removedElements =
Sets.difference(oldElements, newElements)
.stream()
.map(toString)
.map((removalFooterKey.getName() + ": ")::concat);
Stream<String> addedElements =
Sets.difference(newElements, oldElements)
.stream()
.map(toString)
.map((additionFooterKey.getName() + ": ")::concat);
return Stream.concat(removedElements, addedElements);
}
}
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