com.google.gerrit.server.group.db.AuditLogFormatter Maven / Gradle / Ivy
// 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.group.db;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
import com.google.common.collect.ImmutableSet;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.GroupDescription;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountState;
import com.google.gerrit.server.account.GroupBackend;
import java.util.Optional;
import java.util.function.Function;
import org.eclipse.jgit.lib.PersonIdent;
/**
* A formatter for entities used in an audit log which is typically represented by NoteDb commits.
*
* The formatted representation of those entities must be parsable so that we can read them later
* on and map them back to their original entities. {@link AuditLogFormatter} and {@link
* com.google.gerrit.server.notedb.NoteDbUtil NoteDbUtil} contain some of those parsing/mapping
* methods.
*/
public class AuditLogFormatter {
private final Function> accountRetriever;
private final Function> groupRetriever;
@Nullable private final String serverId;
public static AuditLogFormatter createBackedBy(
AccountCache accountCache, GroupBackend groupBackend, String serverId) {
return create(
accountId -> getAccount(accountCache, accountId),
groupUuid -> getGroup(groupBackend, groupUuid),
serverId);
}
private static Optional getAccount(AccountCache accountCache, Account.Id accountId) {
return accountCache.get(accountId).map(AccountState::account);
}
private static Optional getGroup(
GroupBackend groupBackend, AccountGroup.UUID groupUuid) {
return Optional.ofNullable(groupBackend.get(groupUuid));
}
public static AuditLogFormatter createBackedBy(
ImmutableSet allAccounts,
ImmutableSet allGroups,
String serverId) {
return create(id -> getAccount(allAccounts, id), uuid -> getGroup(allGroups, uuid), serverId);
}
private static Optional getGroup(
ImmutableSet groups, AccountGroup.UUID uuid) {
return groups.stream().filter(group -> group.getGroupUUID().equals(uuid)).findAny();
}
private static Optional getAccount(ImmutableSet accounts, Account.Id id) {
return accounts.stream().filter(account -> account.id().equals(id)).findAny();
}
public static AuditLogFormatter createPartiallyWorkingFallBack() {
return new AuditLogFormatter(id -> Optional.empty(), uuid -> Optional.empty());
}
public static AuditLogFormatter create(
Function> accountRetriever,
Function> groupRetriever,
String serverId) {
return new AuditLogFormatter(accountRetriever, groupRetriever, serverId);
}
private AuditLogFormatter(
Function> accountRetriever,
Function> groupRetriever,
String serverId) {
this.accountRetriever = requireNonNull(accountRetriever);
this.groupRetriever = requireNonNull(groupRetriever);
this.serverId = requireNonNull(serverId);
}
private AuditLogFormatter(
Function> accountRetriever,
Function> groupRetriever) {
this.accountRetriever = requireNonNull(accountRetriever);
this.groupRetriever = requireNonNull(groupRetriever);
serverId = null;
}
/**
* Creates a parsable {@code PersonIdent} for commits which are used as an audit log.
*
* Parsable means that we can unambiguously identify the original account when being
* presented with a {@code PersonIdent} of a commit.
*
*
We typically use the initiator of an action as the author of the commit when using those
* commits as an audit log. That's something which has to be specified by a caller of this method
* as this class doesn't create any commits itself.
*
* @param account the {@code Account} of the user who should be represented
* @param personIdent a {@code PersonIdent} which provides the timestamp for the created {@code
* PersonIdent}
* @return a {@code PersonIdent} which can be used for the author of a commit
*/
public PersonIdent getParsableAuthorIdent(Account account, PersonIdent personIdent) {
return getParsableAuthorIdent(account.getName(), account.id(), personIdent);
}
/**
* Creates a parsable {@code PersonIdent} for commits which are used as an audit log.
*
*
See {@link #getParsableAuthorIdent(Account, PersonIdent)} for further details.
*
* @param accountId the ID of the account of the user who should be represented
* @param personIdent a {@code PersonIdent} which provides the timestamp for the created {@code
* PersonIdent}
* @return a {@code PersonIdent} which can be used for the author of a commit
*/
public PersonIdent getParsableAuthorIdent(Account.Id accountId, PersonIdent personIdent) {
String accountName = getAccountName(accountId);
return getParsableAuthorIdent(accountName, accountId, personIdent);
}
/**
* Provides a parsable representation of an account for use in e.g. commit messages.
*
* @param accountId the ID of the account of the user who should be represented
* @return the {@code String} representation of the account
*/
public String getParsableAccount(Account.Id accountId) {
String accountName = getAccountName(accountId);
return formatNameEmail(accountName, getEmailForAuditLog(accountId));
}
/**
* Provides a parsable representation of a group for use in e.g. commit messages.
*
* @param groupUuid the UUID of the group
* @return the {@code String} representation of the group
*/
public String getParsableGroup(AccountGroup.UUID groupUuid) {
String uuid = groupUuid.get();
Optional group = groupRetriever.apply(groupUuid);
String name = group.map(GroupDescription.Basic::getName).orElse(uuid);
return formatNameEmail(name, uuid);
}
private String getAccountName(Account.Id accountId) {
Optional account = accountRetriever.apply(accountId);
return account
.map(Account::getName)
// Historically, the database did not enforce relational integrity, so it is
// possible for groups to have non-existing members.
.orElse("No Account for Id #" + accountId);
}
private PersonIdent getParsableAuthorIdent(
String accountname, Account.Id accountId, PersonIdent personIdent) {
return new PersonIdent(
accountname,
getEmailForAuditLog(accountId),
personIdent.getWhen(),
personIdent.getTimeZone());
}
private String getEmailForAuditLog(Account.Id accountId) {
// If we ever switch to UUIDs for accounts, consider to remove the serverId and to use a similar
// approach as for group UUIDs.
checkState(
serverId != null, "serverId must be defined; fall-back AuditLogFormatter isn't sufficient");
return accountId.get() + "@" + serverId;
}
private static String formatNameEmail(String name, String email) {
StringBuilder formattedResult = new StringBuilder();
PersonIdent.appendSanitized(formattedResult, name);
formattedResult.append(" <");
PersonIdent.appendSanitized(formattedResult, email);
formattedResult.append(">");
return formattedResult.toString();
}
}