/*

  * 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.action;

 import net.sourceforge.pebble.Constants;

 import net.sourceforge.pebble.domain.*;

 import net.sourceforge.pebble.service.LastModifiedService;

 import net.sourceforge.pebble.web.view.NotModifiedView;

 import net.sourceforge.pebble.web.view.View;

 import net.sourceforge.pebble.web.view.impl.*;

 import javax.inject.Inject;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import java.util.*;

 /**

  * Gets a feed (RSS or Atom) for blog entry responses.

  *

  * @author Simon Brown

  */

 public class ResponseFeedAction extends Action {

   @Inject

   private LastModifiedService lastModifiedService;

   /**

    * Peforms the processing associated with this action.

    *

    * @param request  the HttpServletRequest instance

    * @param response the HttpServletResponse instance

    * @return the name of the next view

    */

   public View process(HttpServletRequest request, HttpServletResponse response) throws ServletException {

     Blog blog = (Blog) getModel().get(Constants.BLOG_KEY);

     String flavor = request.getParameter("flavor");

     if (lastModifiedService.checkAndProcessLastModified(request, response, blog.getLastModified(), null)) {

       return new NotModifiedView();

     }

     List<Response> responses = new ArrayList<Response>();

     String entryId = request.getParameter("entry");

     if (entryId != null) {

       BlogService service = new BlogService();

       BlogEntry blogEntry;

       try {

         blogEntry = service.getBlogEntry(blog, entryId);

       } catch (BlogServiceException e) {

         throw new ServletException(e);

       }

       if (blogEntry != null && blogEntry.isPublished()) {

         getModel().put(Constants.BLOG_ENTRY_KEY, blogEntry);

         for (Response r : blogEntry.getResponses()) {

           if (r.isApproved()) {

             responses.add(r);

           }

         }

       }

     } else {

       responses = new ArrayList<Response>(blog.getRecentApprovedResponses());

     }

     int numberOfResponses = blog.getRecentResponsesOnHomePage();

     if (responses.size() > numberOfResponses) {

       responses = responses.subList(0, numberOfResponses);

     }

     getModel().put(Constants.RESPONSES, responses);

     if (flavor != null && flavor.equalsIgnoreCase("atom")) {

       return new ResponseFeedView(AbstractRomeFeedView.FeedType.ATOM);

     } else {

       return new ResponseFeedView(AbstractRomeFeedView.FeedType.RSS);

     }

   }

 }