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/*
* Copyright 2015 - 2022 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar.database;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.Context;
import org.traccar.model.Device;
import org.traccar.model.Group;
import org.traccar.model.Permission;
import org.traccar.model.User;
import org.traccar.storage.Storage;
import org.traccar.storage.StorageException;
import org.traccar.storage.query.Columns;
import org.traccar.storage.query.Condition;
import org.traccar.storage.query.Request;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
public class PermissionsManager {
private static final Logger LOGGER = LoggerFactory.getLogger(PermissionsManager.class);
private final DataManager dataManager;
private final Storage storage;
private final ReadWriteLock lock = new ReentrantReadWriteLock();
private final Map<Long, Set<Long>> groupPermissions = new HashMap<>();
private final Map<Long, Set<Long>> devicePermissions = new HashMap<>();
private final Map<Long, Set<Long>> deviceUsers = new HashMap<>();
private final Map<Long, Set<Long>> groupDevices = new HashMap<>();
public PermissionsManager(DataManager dataManager, Storage storage) {
this.dataManager = dataManager;
this.storage = storage;
refreshDeviceAndGroupPermissions();
}
protected final void readLock() {
lock.readLock().lock();
}
protected final void readUnlock() {
lock.readLock().unlock();
}
protected final void writeLock() {
lock.writeLock().lock();
}
protected final void writeUnlock() {
lock.writeLock().unlock();
}
public User getUser(long userId) {
try {
return storage.getObject(User.class, new Request(
new Columns.All(), new Condition.Equals("id", "id", userId)));
} catch (StorageException e) {
throw new RuntimeException(e);
}
}
public Set<Long> getGroupPermissions(long userId) {
readLock();
try {
if (!groupPermissions.containsKey(userId)) {
groupPermissions.put(userId, new HashSet<>());
}
return groupPermissions.get(userId);
} finally {
readUnlock();
}
}
public Set<Long> getDevicePermissions(long userId) {
readLock();
try {
if (!devicePermissions.containsKey(userId)) {
devicePermissions.put(userId, new HashSet<>());
}
return devicePermissions.get(userId);
} finally {
readUnlock();
}
}
private Set<Long> getAllDeviceUsers(long deviceId) {
readLock();
try {
if (!deviceUsers.containsKey(deviceId)) {
deviceUsers.put(deviceId, new HashSet<>());
}
return deviceUsers.get(deviceId);
} finally {
readUnlock();
}
}
public Set<Long> getGroupDevices(long groupId) {
readLock();
try {
if (!groupDevices.containsKey(groupId)) {
groupDevices.put(groupId, new HashSet<>());
}
return groupDevices.get(groupId);
} finally {
readUnlock();
}
}
public final void refreshDeviceAndGroupPermissions() {
writeLock();
try {
groupPermissions.clear();
devicePermissions.clear();
try {
var groups = dataManager.getObjects(Group.class);
GroupTree groupTree = new GroupTree(groups, Context.getDeviceManager().getAllDevices());
for (Permission groupPermission : dataManager.getPermissions(User.class, Group.class)) {
Set<Long> userGroupPermissions = getGroupPermissions(groupPermission.getOwnerId());
Set<Long> userDevicePermissions = getDevicePermissions(groupPermission.getOwnerId());
userGroupPermissions.add(groupPermission.getPropertyId());
for (Group group : groupTree.getGroups(groupPermission.getPropertyId())) {
userGroupPermissions.add(group.getId());
}
for (Device device : groupTree.getDevices(groupPermission.getPropertyId())) {
userDevicePermissions.add(device.getId());
}
}
for (Permission devicePermission : dataManager.getPermissions(User.class, Device.class)) {
getDevicePermissions(devicePermission.getOwnerId()).add(devicePermission.getPropertyId());
}
groupDevices.clear();
for (var group : groups) {
for (Device device : groupTree.getDevices(group.getId())) {
getGroupDevices(group.getId()).add(device.getId());
}
}
} catch (StorageException | ClassNotFoundException error) {
LOGGER.warn("Refresh device permissions error", error);
}
deviceUsers.clear();
for (Map.Entry<Long, Set<Long>> entry : devicePermissions.entrySet()) {
for (long deviceId : entry.getValue()) {
getAllDeviceUsers(deviceId).add(entry.getKey());
}
}
} finally {
writeUnlock();
}
}
public boolean getUserAdmin(long userId) {
User user = getUser(userId);
return user != null && user.getAdministrator();
}
public void refreshPermissions(Permission permission) {
if (permission.getOwnerClass().equals(User.class)) {
if (permission.getPropertyClass().equals(Device.class)
|| permission.getPropertyClass().equals(Group.class)) {
refreshDeviceAndGroupPermissions();
}
}
}
}
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