/* 
 * File: LoginPanel.java 
 * Auth: Mark Bednarczyk 
 * Date: DATE 
 *   Id: $Id$
 ********************************************
 * $Log$
 */
package voytechs.tool.desktop;

import voytechs.security.user.UserProfile;
import voytechs.html.component.*;
import voytechs.html.event.*;
import voytechs.util.event.*;
import voytechs.tool.LogFacility;

import java.lang.*;
import java.util.*;
import java.io.*;

/**
 * A two state button. When no user is logged in the default
 * login button displayes 'Login' text. By clicking on the Login
 * element, a Login popup is displayed on the client. After a user has
 * logged in, this element automatically turns off the login button and
 * displays its second button, the profile button. This has the effect
 * of at first seeing a Login then a Profile button immediately after the
 * login. The displayed simple elements can be replaced by using the 
 * addLoginElement() and addProfileElement() methods.
 */
public class LoginPanel 
	extends Panel {

	/* Internal attributes */

	private Link loginButton = null;
	private LinkComponent profileButton = null;
	private String userName = "";

	/**
	 * Prebuild the static structure of the control panel.
	 */
	public LoginPanel() throws EventException {

		addElement(loginButton = new LoginButton().addElement(
				new Text("Login")));
		addElement(profileButton = new Link().addElement(
				new Text("Profile")));

		profileButton.show(false);
	}

	/**
	 *
	 */
	protected void process() {
		LogFacility.log.println("ContronPanel::process() - profileButton.show()=" + 
														profileButton.show() + 
														" isUserLoggedIn()=" + 
														getRootFrame().isUserLoggedIn());

		if((profileButton.show() == false && getRootFrame().isUserLoggedIn()) ||
			 (getRootFrame().isUserLoggedIn() && 
			  userName.equals(getRootFrame().getUserName()) == false)) {

			 userName = getRootFrame().getUserName();

			loginButton.show(false);

			profileButton.show(true);
		}
	}

	/**
	 * Adds a simple textual/graphical element to the Login button.
	 * The element is displayed when no user is logged in. The show(false) is
	 * called when a user login is detected at which time the profile element
	 * is displayed.
	 */
	public void addLoginElement(SimpleComponent loginElement)
			throws EventException {

		loginButton.addElement(loginElement);
	}

	/**
	 * Adds a simple textual/graphical element to the Profile button.
	 * The element is displayed when a user is logged in. Normally this button
	 * is not displayed when no user is logged in. 
	 */
	public void addProfileElement(LinkComponent profileElement)
			throws EventException {

		// remove the current element from the LoginPanel
		if(profileButton != null);
			removeElement(profileButton);

		profileButton = profileElement;
		addElement(profileElement);
	}

	/**
	 * Test function for LoginPanel
	 * @param args command line arguments
	 */
	public static void main(String [] args) {
	}

} /* END OF: LoginPanel */