/*

  * 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.util.SecurityUtils;

 import net.sourceforge.pebble.domain.*;

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

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

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

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import java.util.List;

 import java.util.ArrayList;

 /**

  * Finds all blog entries for a particular month, ready for them

  * to be displayed.

  *

  * @author    Simon Brown

  */

 public class ViewMonthAction extends Action {

   /**

    * 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 {

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

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

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

     Month monthly;

     if (year != null && year.length() > 0 &&

         month != null && month.length() > 0) {

       monthly = blog.getBlogForMonth(Integer.parseInt(year), Integer.parseInt(month));

     } else {

       return new NotFoundView();

     }

     BlogService service = new BlogService();

     List<BlogEntry> blogEntries = null;

     try {

       blogEntries = service.getBlogEntries(blog, Integer.parseInt(year), Integer.parseInt(month));

     } catch (BlogServiceException e) {

       throw new ServletException(e);

     }

     getModel().put(Constants.BLOG_ENTRIES, filter(blog, blogEntries));

     getModel().put("displayMode", "month");

     getModel().put(Constants.MONTHLY_BLOG, monthly);

     // put the previous and next months in the model for navigation purposes

     Month firstMonth = blog.getBlogForFirstMonth();

     Month previousMonth = monthly.getPreviousMonth();

     Month nextMonth = monthly.getNextMonth();

     if (!previousMonth.before(firstMonth)) {

       getModel().put("previousMonth", previousMonth);

     }

     if (!nextMonth.getDate().after(blog.getCalendar().getTime()) || nextMonth.before(firstMonth)) {

       getModel().put("nextMonth", nextMonth);

     }

     return new BlogEntriesByMonthView();

   }

   private List<BlogEntry> filter(Blog blog, List<BlogEntry> blogEntries) {

     List<BlogEntry> filtered = new ArrayList<BlogEntry>();

     for (BlogEntry blogEntry : blogEntries) {

       if (

           blogEntry.isPublished() ||

           (

             (SecurityUtils.isUserAuthorisedForBlog(blog) && blogEntry.isUnpublished())

           )

          ) {

         filtered.add(blogEntry);

       }

     }

     return filtered;

   }

 }