/*
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/>.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
 * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
 * language governing rights and limitations under the License.
 * 
 * The Original Code is the Venice Web Community System.
 * 
 * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
 * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
 * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
 * 
 * Contributor(s): 
 */
package com.silverwrist.venice.servlets.format;

import java.io.Writer;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Vector;
import com.silverwrist.venice.core.UserContext;
import com.silverwrist.venice.core.DataException;

public abstract class TCStandardPanel extends TopContentPanel
{
  class TCButton implements ComponentRender
  {
    private String image;
    private String alt_text;
    private String url;
    private boolean login_only;
    private int width;
    private int height;

    public TCButton(String image, String alt_text, String url, boolean login_only, int width, int height)
    {
      this.image = image;
      this.alt_text = alt_text;
      this.url = url;
      this.login_only = login_only;
      this.width = width;
      this.height = height;

    } // end constructor

    public void renderHere(Writer out, RenderData rdat) throws IOException
    {
      if (url!=null)
	out.write("<A HREF=\"" + rdat.getEncodedServletPath(url) + "\">");
      out.write("<IMG SRC=\"" + rdat.getFullImagePath(image) + "\" ALT=\"" + alt_text);
      out.write("\" BORDER=0 WIDTH=" + String.valueOf(width) + " HEIGHT=" + String.valueOf(height) + ">");
      if (url!=null)
	out.write("</A>");

    } // end renderHere
    
    public boolean isLoginOnly()
    {
      return login_only;

    } // end isLoginOnly

  } // end class TCButton

  // Attributes
  private String title;
  private String subtitle;
  private Vector buttons;

  private String real_title;
  private String real_subtitle;
  private boolean logged_in;

  protected TCStandardPanel(String title, String subtitle)
  {
    this.title = title;
    this.subtitle = subtitle;
    this.buttons = new Vector();
    this.real_title = title;
    this.real_subtitle = subtitle;

  } // end constructor

  protected TCStandardPanel(TCStandardPanel other)
  {
    super(other);
    this.title = other.title;
    this.subtitle = other.subtitle;
    this.buttons = other.buttons;
    this.real_title = other.title;
    this.real_subtitle = other.subtitle;

  } // end constructor

  private boolean displayButtons()
  {
    if (buttons.size()==0)
      return false;
    else if (logged_in)
      return true;

    boolean login_only = true;
    Enumeration enum = buttons.elements();
    while (login_only && enum.hasMoreElements())
    { // attempt to determine if there are any non-"login only" buttons
      TCButton bn = (TCButton)(enum.nextElement());
      login_only = bn.isLoginOnly();

    } // end while

    return !login_only;

  } // end displayButtons

  protected void addButton(String image, String alt_text, String url, boolean login_only, int width,
			   int height)
  {
    buttons.addElement(new TCButton(image,alt_text,url,login_only,width,height));

  } // end addButton

  protected abstract void renderContent(Writer out, RenderData rdat) throws IOException;

  public void renderHere(Writer out, RenderData rdat) throws IOException
  {
    rdat.writeContentHeader(out,real_title,real_subtitle);

    if (displayButtons())
    { // want to print the buttons
      out.write("<DIV ALIGN=\"LEFT\">\n");
      Enumeration enum = buttons.elements();

      boolean first_post = true;
      while (enum.hasMoreElements())
      { // figure out whether to display this button
	TCButton bn = (TCButton)(enum.nextElement());
	boolean display_me = logged_in;
	if (logged_in)
	  display_me = true;
	else
	  display_me = !(bn.isLoginOnly());

	if (display_me)
	{ // display this button
	  if (first_post)
	    first_post = false;
	  else
	    out.write("&nbsp;&nbsp;");
	  bn.renderHere(out,rdat);

	} // end if

      } // end while

      out.write("\n</DIV>\n");

    } // end if

    renderContent(out,rdat);

  } // end renderHere

  public void configure(UserContext uc, String parameter) throws DataException
  {
    logged_in = uc.isLoggedIn();

  } // end configure

  public void setTitle(String title)
  {
    this.real_title = title;

  } // end setTitle

  public void setSubtitle(String title)
  {
    this.real_subtitle = subtitle;

  } // end setTitle

} // end class TCPanelSIGs