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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.pgm.init.api;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.securestore.SecureStore;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.Set;
/** Helper to edit a section of the configuration files. */
public class Section {
public interface Factory {
Section get(@Assisted("section") String section, @Assisted("subsection") String subsection);
}
private final InitFlags flags;
private final SitePaths site;
private final ConsoleUI ui;
private final String section;
private final String subsection;
private final SecureStore secureStore;
@Inject
public Section(
final InitFlags flags,
final SitePaths site,
final SecureStore secureStore,
final ConsoleUI ui,
@Assisted("section") final String section,
@Assisted("subsection") @Nullable final String subsection) {
this.flags = flags;
this.site = site;
this.ui = ui;
this.section = section;
this.subsection = subsection;
this.secureStore = secureStore;
}
public String get(String name) {
return flags.cfg.getString(section, subsection, name);
}
public void set(final String name, final String value) {
final ArrayList all = new ArrayList<>();
all.addAll(Arrays.asList(flags.cfg.getStringList(section, subsection, name)));
if (value != null) {
if (all.size() == 0 || all.size() == 1) {
flags.cfg.setString(section, subsection, name, value);
} else {
all.set(0, value);
flags.cfg.setStringList(section, subsection, name, all);
}
} else if (all.size() == 1) {
flags.cfg.unset(section, subsection, name);
} else if (all.size() != 0) {
all.remove(0);
flags.cfg.setStringList(section, subsection, name, all);
}
}
public > void set(final String name, final T value) {
if (value != null) {
set(name, value.name());
} else {
unset(name);
}
}
public void unset(String name) {
set(name, (String) null);
}
public String string(final String title, final String name, final String dv) {
return string(title, name, dv, false);
}
public String string(
final String title, final String name, final String dv, final boolean nullIfDefault) {
final String ov = get(name);
String nv = ui.readString(ov != null ? ov : dv, "%s", title);
if (nullIfDefault && nv.equals(dv)) {
nv = null;
}
if (!eq(ov, nv)) {
set(name, nv);
}
return nv;
}
public Path path(final String title, final String name, final String defValue) {
return site.resolve(string(title, name, defValue));
}
public , E extends EnumSet> T select(
String title, String name, T defValue) {
return select(title, name, defValue, false);
}
public , E extends EnumSet> T select(
String title, String name, T defValue, boolean nullIfDefault) {
@SuppressWarnings("unchecked")
E allowedValues = (E) EnumSet.allOf(defValue.getClass());
return select(title, name, defValue, allowedValues, nullIfDefault);
}
public , E extends EnumSet> T select(
String title, String name, T defValue, E allowedValues) {
return select(title, name, defValue, allowedValues, false);
}
public , A extends EnumSet> T select(
String title, String name, T defValue, A allowedValues, final boolean nullIfDefault) {
final boolean set = get(name) != null;
T oldValue = flags.cfg.getEnum(section, subsection, name, defValue);
T newValue = ui.readEnum(oldValue, allowedValues, "%s", title);
if (nullIfDefault && newValue == defValue) {
newValue = null;
}
if (!set || oldValue != newValue) {
if (newValue != null) {
set(name, newValue);
} else {
unset(name);
}
}
return newValue;
}
public String select(
final String title, final String name, final String dv, Set allowedValues) {
final String ov = get(name);
String nv = ui.readString(ov != null ? ov : dv, allowedValues, "%s", title);
if (!eq(ov, nv)) {
set(name, nv);
}
return nv;
}
public String password(final String username, final String password) {
final String ov = getSecure(password);
String user = flags.sec.get(section, subsection, username);
if (user == null) {
user = get(username);
}
if (user == null) {
flags.sec.unset(section, subsection, password);
return null;
}
if (ov != null) {
// If the user already has a password stored, try to reuse it
// rather than prompting for a whole new one.
//
if (ui.isBatch() || !ui.yesno(false, "Change %s's password", user)) {
return ov;
}
}
final String nv = ui.password("%s's password", user);
if (!eq(ov, nv)) {
setSecure(password, nv);
}
return nv;
}
public String passwordForKey(String prompt, String passwordKey) {
String ov = getSecure(passwordKey);
if (ov != null) {
// If the password is already stored, try to reuse it
// rather than prompting for a whole new one.
//
if (ui.isBatch() || !ui.yesno(false, "Change %s", passwordKey)) {
return ov;
}
}
final String nv = ui.password("%s", prompt);
if (!eq(ov, nv)) {
setSecure(passwordKey, nv);
}
return nv;
}
public String getSecure(String name) {
return flags.sec.get(section, subsection, name);
}
public void setSecure(String name, String value) {
if (value != null) {
secureStore.set(section, subsection, name, value);
} else {
secureStore.unset(section, subsection, name);
}
}
String getName() {
return section;
}
private static boolean eq(final String a, final String b) {
if (a == null && b == null) {
return true;
}
return a != null && a.equals(b);
}
}
