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// Copyright (C) 2013 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.group;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.GroupDescription;
import com.google.gerrit.extensions.common.AccountInfo;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.account.AccountInfoComparator;
import com.google.gerrit.server.account.AccountLoader;
import com.google.gerrit.server.account.GroupCache;
import com.google.gerrit.server.account.GroupControl;
import com.google.gerrit.server.group.GroupResource;
import com.google.gerrit.server.group.InternalGroup;
import com.google.gerrit.server.group.InternalGroupDescription;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import org.kohsuke.args4j.Option;
public class ListMembers implements RestReadView<GroupResource> {
private final GroupCache groupCache;
private final GroupControl.Factory groupControlFactory;
private final AccountLoader.Factory accountLoaderFactory;
@Option(name = "--recursive", usage = "to resolve included groups recursively")
private boolean recursive;
@Inject
protected ListMembers(
GroupCache groupCache,
GroupControl.Factory groupControlFactory,
AccountLoader.Factory accountLoaderFactory) {
this.groupCache = groupCache;
this.groupControlFactory = groupControlFactory;
this.accountLoaderFactory = accountLoaderFactory;
}
public ListMembers setRecursive(boolean recursive) {
this.recursive = recursive;
return this;
}
@Override
public Response<List<AccountInfo>> apply(GroupResource resource)
throws NotInternalGroupException, PermissionBackendException {
GroupDescription.Internal group =
resource.asInternalGroup().orElseThrow(NotInternalGroupException::new);
if (recursive) {
return Response.ok(getTransitiveMembers(group, resource.getControl()));
}
return Response.ok(getDirectMembers(group, resource.getControl()));
}
public List<AccountInfo> getTransitiveMembers(AccountGroup.UUID groupUuid)
throws PermissionBackendException {
Optional<InternalGroup> group = groupCache.get(groupUuid);
if (group.isPresent()) {
return getTransitiveMembers(group.get());
}
return ImmutableList.of();
}
public List<AccountInfo> getTransitiveMembers(InternalGroup group)
throws PermissionBackendException {
InternalGroupDescription internalGroup = new InternalGroupDescription(group);
GroupControl groupControl = groupControlFactory.controlFor(internalGroup);
return getTransitiveMembers(internalGroup, groupControl);
}
private List<AccountInfo> getTransitiveMembers(
GroupDescription.Internal group, GroupControl groupControl)
throws PermissionBackendException {
checkSameGroup(group, groupControl);
Set<Account.Id> members =
getTransitiveMemberIds(
group, groupControl, new HashSet<>(ImmutableSet.of(group.getGroupUUID())));
return toAccountInfos(members);
}
public List<AccountInfo> getDirectMembers(InternalGroup group) throws PermissionBackendException {
InternalGroupDescription internalGroup = new InternalGroupDescription(group);
return getDirectMembers(internalGroup, groupControlFactory.controlFor(internalGroup));
}
public List<AccountInfo> getDirectMembers(
GroupDescription.Internal group, GroupControl groupControl)
throws PermissionBackendException {
checkSameGroup(group, groupControl);
Set<Account.Id> directMembers = getDirectMemberIds(group, groupControl);
return toAccountInfos(directMembers);
}
protected List<AccountInfo> getMembers(InternalGroup group) throws PermissionBackendException {
if (recursive) {
return getTransitiveMembers(group);
} else {
return getDirectMembers(group);
}
}
private List<AccountInfo> toAccountInfos(Set<Account.Id> members)
throws PermissionBackendException {
AccountLoader accountLoader = accountLoaderFactory.create(true);
List<AccountInfo> memberInfos = new ArrayList<>(members.size());
for (Account.Id member : members) {
memberInfos.add(accountLoader.get(member));
}
accountLoader.fill();
memberInfos.sort(AccountInfoComparator.ORDER_NULLS_FIRST);
return memberInfos;
}
private Set<Account.Id> getTransitiveMemberIds(
GroupDescription.Internal group,
GroupControl groupControl,
HashSet<AccountGroup.UUID> seenGroups) {
Set<Account.Id> directMembers = getDirectMemberIds(group, groupControl);
if (!groupControl.canSeeGroup()) {
return directMembers;
}
Set<Account.Id> indirectMembers = getIndirectMemberIds(group, seenGroups);
return Sets.union(directMembers, indirectMembers);
}
private static Set<Account.Id> getDirectMemberIds(
GroupDescription.Internal group, GroupControl groupControl) {
return group.getMembers().stream().filter(groupControl::canSeeMember).collect(toImmutableSet());
}
private Set<Account.Id> getIndirectMemberIds(
GroupDescription.Internal group, HashSet<AccountGroup.UUID> seenGroups) {
Set<Account.Id> indirectMembers = new HashSet<>();
for (AccountGroup.UUID subgroupUuid : group.getSubgroups()) {
if (!seenGroups.contains(subgroupUuid)) {
seenGroups.add(subgroupUuid);
Set<Account.Id> subgroupMembers =
groupCache
.get(subgroupUuid)
.map(InternalGroupDescription::new)
.map(
subgroup -> {
GroupControl subgroupControl = groupControlFactory.controlFor(subgroup);
return getTransitiveMemberIds(subgroup, subgroupControl, seenGroups);
})
.orElseGet(ImmutableSet::of);
indirectMembers.addAll(subgroupMembers);
}
}
return indirectMembers;
}
private static void checkSameGroup(GroupDescription.Internal group, GroupControl groupControl) {
checkState(
group.equals(groupControl.getGroup()), "Specified group and groupControl do not match");
}
}
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