de.unipassau.isl.evs.ssh.master.network.broadcast.UserConfigurationBroadcaster.java Source code

Introduction

Here is the source code for de.unipassau.isl.evs.ssh.master.network.broadcast.UserConfigurationBroadcaster.java

Source

/*
 * MIT License
 *
 * Copyright (c) 2016.
 * Bucher Andreas, Fink Simon Dominik, Fraedrich Christoph, Popp Wolfgang,
 * Sell Leon, Werli Philemon
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package de.unipassau.isl.evs.ssh.master.network.broadcast;

import com.google.common.base.Function;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Multimaps;

import java.util.List;

import de.ncoder.typedmap.Key;
import de.unipassau.isl.evs.ssh.core.container.AbstractComponent;
import de.unipassau.isl.evs.ssh.core.database.dto.Group;
import de.unipassau.isl.evs.ssh.core.database.dto.PermissionDTO;
import de.unipassau.isl.evs.ssh.core.database.dto.UserDevice;
import de.unipassau.isl.evs.ssh.core.messaging.Message;
import de.unipassau.isl.evs.ssh.core.messaging.OutgoingRouter;
import de.unipassau.isl.evs.ssh.core.messaging.RoutingKeys;
import de.unipassau.isl.evs.ssh.core.messaging.payload.UserDeviceInformationPayload;
import de.unipassau.isl.evs.ssh.core.naming.DeviceID;
import de.unipassau.isl.evs.ssh.master.database.PermissionController;
import de.unipassau.isl.evs.ssh.master.database.SlaveController;
import de.unipassau.isl.evs.ssh.master.database.UserManagementController;
import de.unipassau.isl.evs.ssh.master.network.Server;

/**
 * The ModuleBroadcaster class sends push messages to connected clients to update their information about users and
 * groups.
 *
 * @author Wolfgang Popp.
 */
public class UserConfigurationBroadcaster extends AbstractComponent {
    public static final Key<UserConfigurationBroadcaster> KEY = new Key<>(UserConfigurationBroadcaster.class);

    /**
     * Sends a message with a UserDeviceInformationPayload to each connected client.
     */
    public void updateAllClients() {
        final Iterable<DeviceID> connectedClients = requireComponent(Server.KEY).getActiveDevices();
        for (DeviceID connectedClient : connectedClients) {
            updateClient(connectedClient);
        }
    }

    /**
     * Sends a message with a UserDeviceInformationPayload to the given client.
     *
     * @param id the id of the client that will receive the message
     */
    public void updateClient(DeviceID id) {
        final Message message = new Message(generateUserDeviceInformationPayload());
        if (!isSlave(id)) {
            requireComponent(OutgoingRouter.KEY).sendMessage(id, RoutingKeys.APP_USERINFO_UPDATE, message);
        }
    }

    private boolean isSlave(DeviceID id) {
        return requireComponent(SlaveController.KEY).getSlave(id) != null;
    }

    private UserDeviceInformationPayload generateUserDeviceInformationPayload() {
        final PermissionController permissionController = requireComponent(PermissionController.KEY);
        final List<Group> groups;
        final List<UserDevice> userDevices;
        final List<String> templates;
        final List<PermissionDTO> permissions;
        groups = requireComponent(UserManagementController.KEY).getGroups();
        userDevices = requireComponent(UserManagementController.KEY).getUserDevices();
        permissions = requireComponent(PermissionController.KEY).getPermissions();
        templates = requireComponent(PermissionController.KEY).getTemplates();

        ImmutableListMultimap<Group, UserDevice> groupDeviceMapping = Multimaps.index(userDevices,
                new Function<UserDevice, Group>() {
                    @Override
                    public Group apply(UserDevice input) {
                        for (Group group : groups) {
                            if (group.getName().equals(input.getInGroup())) {
                                return group;
                            }
                        }
                        return null;
                    }
                });

        ListMultimap<UserDevice, PermissionDTO> userHasPermissions = ArrayListMultimap.create();
        for (UserDevice userDevice : userDevices) {
            userHasPermissions.putAll(userDevice,
                    permissionController.getPermissionsOfUserDevice(userDevice.getUserDeviceID()));
        }

        return new UserDeviceInformationPayload(userHasPermissions, groupDeviceMapping, permissions, groups,
                templates);
    }
}