// Copyright (C) 2010 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.common.data.ApprovalType;
import com.google.gerrit.common.data.ApprovalTypes;
import com.google.gerrit.common.data.Permission;
import com.google.gerrit.reviewdb.client.ApprovalCategory;
import com.google.gerrit.reviewdb.client.PatchSetApproval;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.project.ChangeControl;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gerrit.server.query.OperatorPredicate;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Provider;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
class LabelPredicate extends OperatorPredicate<ChangeData> {
private static enum Test {
EQ {
@Override
public boolean match(int psValue, int expValue) {
return psValue == expValue;
}
},
GT_EQ {
@Override
public boolean match(int psValue, int expValue) {
return psValue >= expValue;
}
},
LT_EQ {
@Override
public boolean match(int psValue, int expValue) {
return psValue <= expValue;
}
};
abstract boolean match(int psValue, int expValue);
}
private static ApprovalCategory category(ApprovalTypes types, String toFind) {
if (types.byLabel(toFind) != null) {
return types.byLabel(toFind).getCategory();
}
if (types.byId(new ApprovalCategory.Id(toFind)) != null) {
return types.byId(new ApprovalCategory.Id(toFind)).getCategory();
}
for (ApprovalType at : types.getApprovalTypes()) {
ApprovalCategory category = at.getCategory();
if (toFind.equalsIgnoreCase(category.getName())) {
return category;
} else if (toFind.equalsIgnoreCase(category.getName().replace(" ", ""))) {
return category;
}
}
for (ApprovalType at : types.getApprovalTypes()) {
ApprovalCategory category = at.getCategory();
if (toFind.equalsIgnoreCase(category.getAbbreviatedName())) {
return category;
}
}
return new ApprovalCategory(new ApprovalCategory.Id(toFind), toFind);
}
private static Test op(String op) {
if ("=".equals(op)) {
return Test.EQ;
} else if (">=".equals(op)) {
return Test.GT_EQ;
} else if ("<=".equals(op)) {
return Test.LT_EQ;
} else {
throw new IllegalArgumentException("Unsupported operation " + op);
}
}
private static int value(String value) {
if (value.startsWith("+")) {
value = value.substring(1);
}
return Integer.parseInt(value);
}
private final ChangeControl.GenericFactory ccFactory;
private final IdentifiedUser.GenericFactory userFactory;
private final Provider<ReviewDb> dbProvider;
private final Test test;
private final ApprovalCategory category;
private final String permissionName;
private final int expVal;
LabelPredicate(ChangeControl.GenericFactory ccFactory,
IdentifiedUser.GenericFactory userFactory, Provider<ReviewDb> dbProvider,
ApprovalTypes types, String value) {
super(ChangeQueryBuilder.FIELD_LABEL, value);
this.ccFactory = ccFactory;
this.userFactory = userFactory;
this.dbProvider = dbProvider;
Matcher m1 = Pattern.compile("(=|>=|<=)([+-]?\\d+)$").matcher(value);
Matcher m2 = Pattern.compile("([+-]\\d+)$").matcher(value);
if (m1.find()) {
category = category(types, value.substring(0, m1.start()));
test = op(m1.group(1));
expVal = value(m1.group(2));
} else if (m2.find()) {
category = category(types, value.substring(0, m2.start()));
test = Test.EQ;
expVal = value(m2.group(1));
} else {
category = category(types, value);
test = Test.EQ;
expVal = 1;
}
this.permissionName = Permission.forLabel(category.getLabelName());
}
@Override
public boolean match(final ChangeData object) throws OrmException {
for (PatchSetApproval p : object.currentApprovals(dbProvider)) {
if (p.getCategoryId().equals(category.getId())) {
int psVal = p.getValue();
if (test.match(psVal, expVal)) {
// Double check the value is still permitted for the user.
//
try {
ChangeControl cc = ccFactory.controlFor(object.change(dbProvider), //
userFactory.create(dbProvider, p.getAccountId()));
if (!cc.isVisible(dbProvider.get())) {
// The user can't see the change anymore.
//
continue;
}
psVal = cc.getRange(permissionName).squash(psVal);
} catch (NoSuchChangeException e) {
// The project has disappeared.
//
continue;
}
if (test.match(psVal, expVal)) {
return true;
}
}
}
}
return false;
}
@Override
public int getCost() {
return 2;
}
}