/*

  * 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.Blog;

 import net.sourceforge.pebble.domain.BlogEntry;

 import net.sourceforge.pebble.domain.BlogService;

 import net.sourceforge.pebble.domain.BlogServiceException;

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

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

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

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 /**

  * Allows the user to export current blog entry as a PDF file.

  *

  * @author    Alexander Zagniotov

  */

 public class BlogEntryToPdfAction extends Action {

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

   /**

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

     BlogEntry blogEntry = null;

     if (entryId != null) {

       BlogService service = new BlogService();

       try {

         blogEntry = service.getBlogEntry(blog, entryId);

       } catch (BlogServiceException e) {

         throw new ServletException(e);

       }

     }

         if (blogEntry == null) {

       // the entry cannot be found - it may have been removed or the

       // requesting URL was wrong

       return new NotFoundView();

     } else {

           String filename = this.buildPermalink(blogEntry);

           return new PdfView(blogEntry, filename + ".pdf");

         }

   }

   private String buildPermalink(BlogEntry blogEntry) {

     String title = blogEntry.getTitle();

     if (title == null || title.length() == 0) {

       title = "" + blogEntry.getId();

     } else {

       title = title.toLowerCase();

       title = title.replaceAll("[\\. ,;/\\\\-]", "_");

       title = title.replaceAll("[^a-z0-9_]", "");

       title = title.replaceAll("_+", "_");

       title = title.replaceAll("^_*", "");

       title = title.replaceAll("_*$", "");

     }

     // if the title has been blanked out, use the blog entry instead

     if (title == null || title.length() == 0) {

       title = "" + blogEntry.getId();

     }

     return title;

   }

 }