trunk/apps/showcase/src/main/java/org/apache/struts2/showcase/chat/Room.java

/*
 * $Id$
 *
 * Copyright 2006 The Apache Software Foundation.
 *
 * 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.apache.struts2.showcase.chat;

import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

public class Room {
	
	private static final int MAX_CHAT_MESSAGES = 10;
	
	private String name;
	private String description;
	private Date creationDate;
	
	private List<ChatMessage> messages = new ArrayList<ChatMessage>();
	
	private Map<String, User> members = new LinkedHashMap<String, User>();
	
	public Room(String name, String description) {
		this.name = name;
		this.description = description;
		this.creationDate = new Date(System.currentTimeMillis());
	}
	
	
	// properties
	public Date getCreationDate() {
		return creationDate;
	}

	public String getDescription() {
		return description;
	}

	public String getName() {
		return name;
	}
	
	
	// (behaviour) members
	public List<User> getMembers() {
		return new ArrayList<User>(members.values());
	}
	public User findMember(String name) {
		assert(name != null);
		return members.get(name);
	}
	public boolean hasMember(String name) {
		assert(name != null);
		return members.containsKey(name);
	}
	public void memberEnter(User member) {
		assert(member != null);
		if (! hasMember(member.getName())) {
			members.put(member.getName(), member);
		}
	}
	
	public void memberExit(String memberName) {
		assert(memberName != null);
		assert(memberName.trim().length() > 0);
		members.remove(memberName);
	}

	
	// (behaviour) chat messags
	public void addMessage(ChatMessage chatMessage) {
		if (messages.size() > MAX_CHAT_MESSAGES) {
			// messages.remove(messages.size() - 1);
			messages.remove(0);
		}
		messages.add(chatMessage);
	}
	
	public List<ChatMessage> getChatMessages() {
		return new ArrayList<ChatMessage>(messages);
	}
	
}