/*

  * Copyright (c) 2003-2011, Simon Brown

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *   - Redistributions of source code must retain the above copyright

  *     notice, this list of conditions and the following disclaimer.

  *

  *   - Redistributions in binary form must reproduce the above copyright

  *     notice, this list of conditions and the following disclaimer in

  *     the documentation and/or other materials provided with the

  *     distribution.

  *

  *   - Neither the name of Pebble nor the names of its contributors may

  *     be used to endorse or promote products derived from this software

  *     without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  * POSSIBILITY OF SUCH DAMAGE.

  */

 package net.sourceforge.pebble.web.filter;

 import net.sourceforge.pebble.Configuration;

 import net.sourceforge.pebble.Constants;

 import net.sourceforge.pebble.PebbleContext;

 import net.sourceforge.pebble.security.PebbleUserDetails;

 import net.sourceforge.pebble.util.HttpsURLRewriter;

 import net.sourceforge.pebble.util.SecurityUtils;

 import net.sourceforge.pebble.util.UrlRewriter;

 import net.sourceforge.pebble.util.Utilities;

 import net.sourceforge.pebble.api.decorator.ContentDecoratorContext;

 import net.sourceforge.pebble.comparator.BlogEntryComparator;

 import net.sourceforge.pebble.comparator.BlogByLastModifiedDateComparator;

 import net.sourceforge.pebble.decorator.ContentDecoratorChain;

 import net.sourceforge.pebble.domain.*;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import javax.servlet.*;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.jsp.jstl.core.Config;

 import java.io.IOException;

 import java.util.Collections;

 import java.util.List;

 import java.util.Locale;

 /**

  * A filter respsonsible for setting up common objects.

  *

  * @author    Simon Brown

  */

 public class PreProcessingFilter implements Filter {

   /** the log used by this class */

   private static Log log = LogFactory.getLog(PreProcessingFilter.class);

   /**

    * Initialises this instance.

    *

    * @param config    a FilterConfig instance

    */

   public void init(FilterConfig config) {

   }

   /**

    * Called when this filter is taken out of service.

    */

   public void destroy() {

   }

   /**

    * Contains the processing associated with this filter.

    */

   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

       throws ServletException, IOException {

     HttpServletRequest httpRequest = (HttpServletRequest)request;

 //    log.info("Session is " + httpRequest.getSession().getId());

 //    HttpServletResponse httpResponse = (HttpServletResponse)response;

 //    Cookie cookie = CookieUtils.getCookie(httpRequest.getCookies(), "JSESSIONID");

 //    if (cookie != null) {

 //      log.info("Domain is " + cookie.getDomain());

 //      log.info("Path is " + cookie.getPath());

 //      cookie.setDomain(".example.com");

 //      cookie.setPath("/");

 //      httpResponse.addCookie(cookie);

 //    }

     String externalUri = (String)request.getAttribute(Constants.EXTERNAL_URI);

     if (externalUri.startsWith("/common/") ||

         externalUri.startsWith("/dwr/") ||

         externalUri.startsWith("/FCKeditor/") ||

         externalUri.startsWith("/scripts/") ||

         externalUri.startsWith("/themes/") ||

         externalUri.equals("/pebble.css") ||

         externalUri.equals("/jckconfig_pebble.js") ||

         externalUri.equals("/favicon.ico")

         ) {

         // do nothing

     } else {

       AbstractBlog blog = (AbstractBlog)request.getAttribute(Constants.BLOG_KEY);

       if (blog instanceof Blog) {

         Blog b = (Blog)blog;

         ContentDecoratorContext context = new ContentDecoratorContext();

         context.setView(ContentDecoratorContext.SUMMARY_VIEW);

         context.setMedia(ContentDecoratorContext.HTML_PAGE);

         List<BlogEntry> blogEntries = b.getRecentPublishedBlogEntries();

         ContentDecoratorChain.decorate(context, blogEntries);

         Collections.sort(blogEntries, new BlogEntryComparator());

         httpRequest.setAttribute(Constants.RECENT_BLOG_ENTRIES, blogEntries);

         List<Response> recentApprovedResponses = b.getRecentApprovedResponses();

         for (Response r : recentApprovedResponses) {

           if (r instanceof Comment) {

             b.getContentDecoratorChain().decorate(context, (Comment)r);

           } else if (r instanceof TrackBack){

             b.getContentDecoratorChain().decorate(context, (TrackBack)r);

           }

         }

         httpRequest.setAttribute(Constants.RECENT_RESPONSES, recentApprovedResponses);

         httpRequest.setAttribute(Constants.CATEGORIES, b.getCategories());

         httpRequest.setAttribute(Constants.TAGS, b.getTags());

         httpRequest.setAttribute(Constants.PLUGIN_PROPERTIES, b.getPluginProperties());

         httpRequest.setAttribute(Constants.ARCHIVES, b.getArchives());

         httpRequest.setAttribute(Constants.BLOG_TYPE, "singleblog");

       } else {

         httpRequest.setAttribute(Constants.BLOG_TYPE, "multiblog");

       }

       if (PebbleContext.getInstance().getConfiguration().isMultiBlog()) {

         httpRequest.setAttribute(Constants.MULTI_BLOG_KEY, BlogManager.getInstance().getMultiBlog());

         httpRequest.setAttribute(Constants.MULTI_BLOG_URL, Utilities.calcBaseUrl(request.getScheme(), BlogManager.getInstance().getMultiBlog().getUrl()));

         List<Blog> blogs = BlogManager.getInstance().getPublicBlogs();

         Collections.sort(blogs, new BlogByLastModifiedDateComparator());

         httpRequest.setAttribute(Constants.BLOGS, blogs);

       }

       // change the character encoding so that we can successfully get

       // international characters from the request when HTML forms are submitted

       // ... but only if the browser doesn't send the character encoding back

       if (request.getCharacterEncoding() == null) {

         request.setCharacterEncoding(blog.getCharacterEncoding());

       }

       PebbleUserDetails user = SecurityUtils.getUserDetails();

       if (user != null) {

         httpRequest.setAttribute(Constants.AUTHENTICATED_USER, user);

       }

       Config.set(request, Config.FMT_LOCALE, blog.getLocale());

       Config.set(request, Config.FMT_FALLBACK_LOCALE, Locale.ENGLISH);

     }

     try {

                   Configuration configuration = PebbleContext.getInstance().getConfiguration();

                   if(configuration.getSecureUrl().startsWith("https")) {

                           UrlRewriter.useThisRewriter(new HttpsURLRewriter(request.getScheme()));

                   }

             chain.doFilter(request, response);

     } finally {

             UrlRewriter.clear();

     }

   }

 }