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// Copyright (C) 2009 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.account;
import com.google.gerrit.common.data.GroupDescription;
import com.google.gerrit.common.data.GroupDescriptions;
import com.google.gerrit.common.errors.NoSuchGroupException;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.group.InternalGroup;
import com.google.gerrit.server.group.InternalGroupDescription;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.util.Optional;
/** Access control management for a group of accounts managed in Gerrit. */
public class GroupControl {
@Singleton
public static class GenericFactory {
private final PermissionBackend permissionBackend;
private final GroupBackend groupBackend;
@Inject
GenericFactory(PermissionBackend permissionBackend, GroupBackend gb) {
this.permissionBackend = permissionBackend;
groupBackend = gb;
}
public GroupControl controlFor(CurrentUser who, AccountGroup.UUID groupId)
throws NoSuchGroupException {
GroupDescription.Basic group = groupBackend.get(groupId);
if (group == null) {
throw new NoSuchGroupException(groupId);
}
return new GroupControl(who, group, permissionBackend, groupBackend);
}
}
public static class Factory {
private final PermissionBackend permissionBackend;
private final GroupCache groupCache;
private final Provider<CurrentUser> user;
private final GroupBackend groupBackend;
@Inject
Factory(
PermissionBackend permissionBackend,
GroupCache gc,
Provider<CurrentUser> cu,
GroupBackend gb) {
this.permissionBackend = permissionBackend;
groupCache = gc;
user = cu;
groupBackend = gb;
}
public GroupControl controlFor(AccountGroup.Id groupId) throws NoSuchGroupException {
Optional<InternalGroup> group = groupCache.get(groupId);
return group
.map(InternalGroupDescription::new)
.map(this::controlFor)
.orElseThrow(() -> new NoSuchGroupException(groupId));
}
public GroupControl controlFor(AccountGroup.UUID groupId) throws NoSuchGroupException {
final GroupDescription.Basic group = groupBackend.get(groupId);
if (group == null) {
throw new NoSuchGroupException(groupId);
}
return controlFor(group);
}
public GroupControl controlFor(AccountGroup group) {
return controlFor(GroupDescriptions.forAccountGroup(group));
}
public GroupControl controlFor(GroupDescription.Basic group) {
return new GroupControl(user.get(), group, permissionBackend, groupBackend);
}
public GroupControl validateFor(AccountGroup.UUID groupUUID) throws NoSuchGroupException {
final GroupControl c = controlFor(groupUUID);
if (!c.isVisible()) {
throw new NoSuchGroupException(groupUUID);
}
return c;
}
}
private final CurrentUser user;
private final GroupDescription.Basic group;
private Boolean isOwner;
private final PermissionBackend.WithUser perm;
private final GroupBackend groupBackend;
GroupControl(
CurrentUser who,
GroupDescription.Basic gd,
PermissionBackend permissionBackend,
GroupBackend gb) {
user = who;
group = gd;
this.perm = permissionBackend.user(user);
groupBackend = gb;
}
public GroupDescription.Basic getGroup() {
return group;
}
public CurrentUser getUser() {
return user;
}
/** Can this user see this group exists? */
public boolean isVisible() {
/* Check for canAdministrateServer may seem redundant, but allows
* for visibility of all groups that are not an internal group to
* server administrators.
*/
return user.isInternalUser()
|| groupBackend.isVisibleToAll(group.getGroupUUID())
|| user.getEffectiveGroups().contains(group.getGroupUUID())
|| isOwner()
|| canAdministrateServer();
}
public boolean isOwner() {
if (isOwner != null) {
return isOwner;
}
if (group instanceof GroupDescription.Internal) {
AccountGroup.UUID ownerUUID = ((GroupDescription.Internal) group).getOwnerGroupUUID();
isOwner = getUser().getEffectiveGroups().contains(ownerUUID) || canAdministrateServer();
} else {
isOwner = false;
}
return isOwner;
}
private boolean canAdministrateServer() {
try {
perm.check(GlobalPermission.ADMINISTRATE_SERVER);
return true;
} catch (AuthException | PermissionBackendException denied) {
return false;
}
}
public boolean canAddMember() {
return isOwner();
}
public boolean canRemoveMember() {
return isOwner();
}
public boolean canSeeMember(Account.Id id) {
if (user.isIdentifiedUser() && user.getAccountId().equals(id)) {
return true;
}
return canSeeMembers();
}
public boolean canAddGroup() {
return isOwner();
}
public boolean canRemoveGroup() {
return isOwner();
}
public boolean canSeeGroup() {
return canSeeMembers();
}
private boolean canSeeMembers() {
if (group instanceof GroupDescription.Internal) {
return ((GroupDescription.Internal) group).isVisibleToAll() || isOwner();
}
return false;
}
}
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