/*

  * Apache License

  * Version 2.0, January 2004

  * http://www.apache.org/licenses/

  *

  * Copyright 2008 by chenillekit.org

  *

  * 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

  */

 package org.chenillekit.access.services.impl;

 import java.io.IOException;

 import org.apache.tapestry5.EventContext;

 import org.apache.tapestry5.internal.EmptyEventContext;

 import org.apache.tapestry5.ioc.services.SymbolSource;

 import org.apache.tapestry5.services.ContextValueEncoder;

 import org.apache.tapestry5.services.Cookies;

 import org.apache.tapestry5.services.PageRenderRequestFilter;

 import org.apache.tapestry5.services.PageRenderRequestHandler;

 import org.apache.tapestry5.services.PageRenderRequestParameters;

 import org.chenillekit.access.ChenilleKitAccessConstants;

 import org.chenillekit.access.internal.ChenillekitAccessInternalUtils;

 import org.chenillekit.access.services.AccessValidator;

 import org.slf4j.Logger;

 /**

  *

  * @version $Id: PageRenderAccessFilter.java 380 2008-12-30 10:21:52Z mlusetti $

  */

 public class PageRenderAccessFilter implements PageRenderRequestFilter

 {

         private final Logger logger;

         private final AccessValidator accessValidator;

         private final String loginPage;

         private final ContextValueEncoder valueEncoder;

         private final Cookies cookies;

         public PageRenderAccessFilter(AccessValidator accessValidator,

                                                                 SymbolSource symbols, Logger logger,

                                                                 ContextValueEncoder valueEncoder,

                                                                 Cookies cookies)

         {

                 this.logger = logger;

                 this.accessValidator = accessValidator;

                 this.loginPage = symbols.valueForSymbol(ChenilleKitAccessConstants.LOGIN_PAGE);

                 this.cookies = cookies;

                 this.valueEncoder = valueEncoder;

         }

         /*

          * (non-Javadoc)

          * @see org.apache.tapestry5.services.PageRenderRequestFilter#handle(org.apache.tapestry5.services.PageRenderRequestParameters, org.apache.tapestry5.services.PageRenderRequestHandler)

          */

         public void handle(PageRenderRequestParameters parameters,

                         PageRenderRequestHandler handler) throws IOException

         {

 //                String previousPage = cookies.readCookieValue(ChenilleKitAccessConstants.REQUESTED_PAGENAME_COOKIE);

 //                String previousContext = cookies.readCookieValue(ChenilleKitAccessConstants.REQUESTED_EVENTCONTEXT_COOKIE);

 //

 //                if (previousPage != null)

 //                {

 //                        EventContext context = ChenillekitAccessInternalUtils.getContextFromString(valueEncoder, previousContext);

 //                        currentParameters = new PageRenderRequestParameters(previousPage, context);

 //

 //                        cookies.removeCookieValue(ChenilleKitAccessConstants.REQUESTED_EVENTCONTEXT_COOKIE);

 //                        cookies.removeCookieValue(ChenilleKitAccessConstants.REQUESTED_PAGENAME_COOKIE);

 //                }

 //                else if ( !accessValidator.hasAccess(parameters.getLogicalPageName(), null, null) )

                 if ( !accessValidator.hasAccess(parameters.getLogicalPageName(), null, null) )

                 {

                         if (logger.isDebugEnabled())

                                 logger.debug("User hasn't rights to access " + parameters.getLogicalPageName()  + " page");

                         System.out.println("User hasn't rights to access " + parameters.getLogicalPageName()  + " page");

                         cookies.writeCookieValue(ChenilleKitAccessConstants.REQUESTED_PAGENAME_COOKIE, parameters.getLogicalPageName());

                         cookies.writeCookieValue(ChenilleKitAccessConstants.REQUESTED_EVENTCONTEXT_COOKIE, ChenillekitAccessInternalUtils.getContextAsString((parameters.getActivationContext())));

                         handler.handle(getLoginPageParameters());

                 }

                 else

                 {

                         System.out.println("User has rights to access " + parameters.getLogicalPageName()  + " page");

                         handler.handle(parameters);

                 }

         }

         private PageRenderRequestParameters getLoginPageParameters()

         {

                 PageRenderRequestParameters parameters = new PageRenderRequestParameters(loginPage, new EmptyEventContext());

                 return parameters;

         }

 }