ChatController.java

/*
 * Copyright 2009-2011 Prime Technology.
 *
 * 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.primefaces.examples.view;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

import org.primefaces.context.RequestContext;

public class ChatController implements Serializable {
    
    private final static String CHANNEL = "chat";

	private String message;
	
	private String username;
	
	private boolean loggedIn;
    
    private Set<String> users = new HashSet<String>();

	public String getMessage() {
		return message;
	}
	public void setMessage(String message) {
		this.message = message;
	}
	
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	
	public boolean isLoggedIn() {
		return loggedIn;
	}
	public void setLoggedIn(boolean loggedIn) {
		this.loggedIn = loggedIn;
	}

	public void send() {
		RequestContext.getCurrentInstance().push(CHANNEL, username + ": "+  message);
		
		message = null;
	}
	
	public void login() {
        RequestContext requestContext = RequestContext.getCurrentInstance();
        
		if(users.contains(username)) {
            loggedIn = false;
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Username taken", "Try with another username."));
            
            requestContext.addPartialUpdateTarget("growl");
        }
        else {
            users.add(username);
            loggedIn = true;
            
            requestContext.push(CHANNEL, username + " joined the channel.");
        }
	}
    
    public void disconnect() {
        RequestContext.getCurrentInstance().push(CHANNEL, username + " has left the channel.");
        loggedIn = false;
        username = null;
    }
}