/*

  * 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.BlogEntry;

 import net.sourceforge.pebble.domain.Blog;

 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.View;

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

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

 import org.apache.commons.httpclient.HttpClient;

 import org.apache.commons.httpclient.NameValuePair;

 import org.apache.commons.httpclient.methods.PostMethod;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 /**

  * Adds a comment to an existing blog entry.

  *

  * @author    Simon Brown

  */

 public class SendTrackBackAction extends SecureAction {

   /** the log used by this class */

   private static Log log = LogFactory.getLog(SendTrackBackAction.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");

     String trackBackUrl = request.getParameter("url");

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

     String trackBackResponseMessage;

     Integer trackBackResponseCode;

     BlogService service = new BlogService();

     BlogEntry blogEntry = null;

     if (entryId != null) {

       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 if (trackBackUrl == null || trackBackUrl.trim().length() == 0) {

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

       return new TrackBackFormView();

     } else {

       // extract the information to send in the trackback

       String title = blogEntry.getTitle();

       String blogName = blogEntry.getBlog().getName();

       String url = blogEntry.getPermalink();

       // now send the trackback

       try {

         HttpClient httpClient = new HttpClient();

         PostMethod postMethod = new PostMethod(trackBackUrl);

         postMethod.addRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=" + blog.getCharacterEncoding());

         NameValuePair[] data = {

           new NameValuePair("title", title),

           new NameValuePair("url", url),

           new NameValuePair("excerpt", excerpt),

           new NameValuePair("blog_name", blogName)

         };

         postMethod.addParameters(data);

         trackBackResponseCode = new Integer(httpClient.executeMethod(postMethod));

         trackBackResponseMessage = postMethod.getResponseBodyAsString();

       } catch (Exception e) {

         log.error(e.getMessage(), e);

         throw new ServletException(e);

       }

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

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

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

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

       return new TrackBackSentView();

     }

   }

   /**

    * Gets a list of all roles that are allowed to access this action.

    *

    * @return  an array of Strings representing role names

    * @param request

    */

   public String[] getRoles(HttpServletRequest request) {

     return new String[]{Constants.BLOG_CONTRIBUTOR_ROLE};

   }

 }