/*
* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.struts2.showcase.chat;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class ChatServiceImpl implements ChatService {
private Map<String, User> availableUsers = new LinkedHashMap<String, User>();
private Map<String, Room> availableRooms = new LinkedHashMap<String, Room>();
public List<User> getAvailableUsers() {
return new ArrayList<User>(availableUsers.values());
}
public List<Room> getAvailableRooms() {
return new ArrayList<Room>(availableRooms.values());
}
public void addRoom(Room room) {
if (availableRooms.containsKey(room.getName())) {
throw new ChatException("room [" + room.getName() + "] is already available", ChatException.ErrorType.valueOf("ROOM_ALREADY_EXISTS"));
}
availableRooms.put(room.getName(), room);
}
public void login(User user) {
assert (user != null);
if (availableUsers.containsKey(user.getName())) {
throw new ChatException("User [" + user.getName() + "] already exists", ChatException.ErrorType.valueOf("USER_ALREADY_EXISTS"));
}
availableUsers.put(user.getName(), user);
}
public void logout(String name) {
assert (name != null);
assert (name.trim().length() > 0);
availableUsers.remove(name);
for (Room room : availableRooms.values()) {
if (room.hasMember(name)) {
room.memberExit(name);
}
}
}
public void exitRoom(String userName, String roomName) {
assert (roomName != null);
assert (roomName.trim().length() > 0);
if (availableRooms.containsKey(roomName)) {
Room room = availableRooms.get(roomName);
room.memberExit(userName);
}
}
public void enterRoom(User user, String roomName) {
assert (roomName != null);
assert (roomName.trim().length() > 0);
if (!availableRooms.containsKey(roomName)) {
throw new ChatException("No such room exists [" + roomName + "]", ChatException.ErrorType.NO_SUCH_ROOM_EXISTS);
}
Room room = availableRooms.get(roomName);
room.memberEnter(user);
}
public List<ChatMessage> getMessagesInRoom(String roomName) {
assert (roomName != null);
assert (roomName.trim().length() > 0);
if (!availableRooms.containsKey(roomName)) {
throw new ChatException("No such room exists [" + roomName + "]", ChatException.ErrorType.NO_SUCH_ROOM_EXISTS);
}
Room room = availableRooms.get(roomName);
return room.getChatMessages();
}
public void sendMessageToRoom(String roomName, User user, String message) {
assert (roomName != null);
if (!availableRooms.containsKey(roomName)) {
throw new ChatException("No such room exists [" + roomName + "]", ChatException.ErrorType.NO_SUCH_ROOM_EXISTS);
}
Room room = availableRooms.get(roomName);
room.addMessage(new ChatMessage(message, user));
}
public List<User> getUsersAvailableInRoom(String roomName) {
assert (roomName != null);
if (!availableRooms.containsKey(roomName)) {
throw new ChatException("No such room exists [" + roomName + "]", ChatException.ErrorType.NO_SUCH_ROOM_EXISTS);
}
Room room = availableRooms.get(roomName);
return room.getMembers();
}
}