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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.query.change;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.LabelType;
import com.google.gerrit.entities.LabelTypes;
import com.google.gerrit.entities.PatchSetApproval;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.index.query.PostFilterPredicate;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.index.change.ChangeField;
import com.google.gerrit.server.permissions.ChangePermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
import java.util.Optional;
public class EqualsLabelPredicates {
public static class PostFilterEqualsLabelPredicate extends PostFilterPredicate<ChangeData> {
private final Matcher matcher;
public PostFilterEqualsLabelPredicate(LabelPredicate.Args args, String label, int expVal) {
super(ChangeQueryBuilder.FIELD_LABEL, ChangeField.formatLabel(label, expVal));
matcher = new Matcher(args, label, expVal);
}
@Override
public boolean match(ChangeData object) {
return matcher.match(object);
}
@Override
public int getCost() {
return 2;
}
}
public static class IndexEqualsLabelPredicate extends ChangeIndexPostFilterPredicate {
private final Matcher matcher;
public IndexEqualsLabelPredicate(LabelPredicate.Args args, String label, int expVal) {
this(args, label, expVal, null);
}
public IndexEqualsLabelPredicate(
LabelPredicate.Args args, String label, int expVal, Account.Id account) {
super(ChangeField.LABEL, ChangeField.formatLabel(label, expVal, account));
this.matcher = new Matcher(args, label, expVal, account);
}
@Override
public boolean match(ChangeData object) {
return matcher.match(object);
}
@Override
public int getCost() {
return 1 + (matcher.group == null ? 0 : 1);
}
}
private static class Matcher {
protected final ProjectCache projectCache;
protected final PermissionBackend permissionBackend;
protected final IdentifiedUser.GenericFactory userFactory;
protected final String label;
protected final int expVal;
protected final Account.Id account;
protected final AccountGroup.UUID group;
public Matcher(LabelPredicate.Args args, String label, int expVal) {
this(args, label, expVal, null);
}
public Matcher(LabelPredicate.Args args, String label, int expVal, Account.Id account) {
this.permissionBackend = args.permissionBackend;
this.projectCache = args.projectCache;
this.userFactory = args.userFactory;
this.group = args.group;
this.label = label;
this.expVal = expVal;
this.account = account;
}
public boolean match(ChangeData cd) {
Change c = cd.change();
if (c == null) {
// The change has disappeared.
return false;
}
Optional<ProjectState> project = projectCache.get(c.getDest().project());
if (!project.isPresent()) {
// The project has disappeared.
return false;
}
LabelType labelType = type(project.get().getLabelTypes(), label);
if (labelType == null) {
return false; // Label is not defined by this project.
}
boolean hasVote = false;
cd.setStorageConstraint(ChangeData.StorageConstraint.INDEX_PRIMARY_NOTEDB_SECONDARY);
for (PatchSetApproval psa : cd.currentApprovals()) {
if (labelType.matches(psa)) {
hasVote = true;
if (match(cd, psa)) {
return true;
}
}
}
if (!hasVote && expVal == 0) {
return true;
}
return false;
}
private boolean match(ChangeData cd, PatchSetApproval psa) {
if (psa.value() != expVal) {
return false;
}
Account.Id approver = psa.accountId();
if (account != null) {
// case when account in query is numeric
if (!account.equals(approver) && !isMagicUser()) {
return false;
}
// case when account in query = owner
if (account.equals(ChangeQueryBuilder.OWNER_ACCOUNT_ID)
&& !cd.change().getOwner().equals(approver)) {
return false;
}
// case when account in query = non_uploader
if (account.equals(ChangeQueryBuilder.NON_UPLOADER_ACCOUNT_ID)
&& cd.currentPatchSet().uploader().equals(approver)) {
return false;
}
}
IdentifiedUser reviewer = userFactory.create(approver);
if (group != null && !reviewer.getEffectiveGroups().contains(group)) {
return false;
}
// Check the user has 'READ' permission.
try {
PermissionBackend.ForChange perm = permissionBackend.absentUser(approver).change(cd);
if (!projectCache.get(cd.project()).map(ProjectState::statePermitsRead).orElse(false)) {
return false;
}
perm.check(ChangePermission.READ);
return true;
} catch (PermissionBackendException | AuthException e) {
return false;
}
}
private boolean isMagicUser() {
return account.equals(ChangeQueryBuilder.OWNER_ACCOUNT_ID)
|| account.equals(ChangeQueryBuilder.NON_UPLOADER_ACCOUNT_ID);
}
}
public static LabelType type(LabelTypes types, String toFind) {
if (types.byLabel(toFind).isPresent()) {
return types.byLabel(toFind).get();
}
for (LabelType lt : types.getLabelTypes()) {
if (toFind.equalsIgnoreCase(lt.getName())) {
return lt;
}
}
return null;
}
}
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