/*

  * 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.event.trackback;

 import net.sourceforge.pebble.domain.Blog;

 import net.sourceforge.pebble.domain.TrackBack;

 import net.sourceforge.pebble.util.MailUtils;

 import net.sourceforge.pebble.api.event.trackback.TrackBackEvent;

 import net.sourceforge.pebble.web.security.SecurityTokenValidator;

 import net.sourceforge.pebble.web.security.SecurityTokenValidatorImpl;

 import java.text.SimpleDateFormat;

 import java.util.Collection;

 import java.util.HashMap;

 import java.util.Map;

 /**

  * Base class for listeners that send an e-mail notification when new

  * TrackBacks are added.

  *

  * @author Simon Brown

  */

 public abstract class AbstractEmailNotificationListener extends TrackBackListenerSupport {

   /**

    * Called when a TrackBack has been added.

    *

    * @param event a TrackBackEvent instance

    */

   public void trackBackAdded(TrackBackEvent event) {

     sendNotification(event.getTrackBack());

   }

   private void sendNotification(TrackBack trackBack) {

     Blog blog = trackBack.getBlogEntry().getBlog();

     SimpleDateFormat sdf = new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");

     sdf.setTimeZone(blog.getTimeZone());

     String subject = MailUtils.getTrackbackPrefix(blog, trackBack.getState()) + " " + trackBack.getTitle();

     String message = "TrackBack from <a href=\"" + trackBack.getUrl() + "\">" + trackBack.getBlogName() + "</a> on " + sdf.format(trackBack.getDate());

     message += " in response to " + trackBack.getBlogEntry().getTitle();

     message += "\n\n<br><br>";

     message += trackBack.getExcerpt();

     message += "\n\n<br><br>";

     message += "<a href=\"" + trackBack.getPermalink() + "\">Permalink</a>";

     SecurityTokenValidator validator = new SecurityTokenValidatorImpl();

     if (trackBack.isPending()) {

       message += " | ";

       message += "<a href=\"" + blog.getUrl() + validator.generateSignedQueryString("manageResponses.secureaction",

               createMap("response", trackBack.getGuid(), "submit", "Approve"), blog.getXsrfSigningSalt()) + "\">Approve</a>";

       message += " | ";

       message += "<a href=\"" + blog.getUrl() + validator.generateSignedQueryString("manageResponses.secureaction",

               createMap("response", trackBack.getGuid(), "submit", "Reject"), blog.getXsrfSigningSalt()) + "\">Reject</a>";

     }

     message += " | ";

     message += "<a href=\"" + blog.getUrl() + validator.generateSignedQueryString("manageResponses.secureaction",

             createMap("response", trackBack.getGuid(), "submit", "Remove"), blog.getXsrfSigningSalt()) + "\">Remove</a>";

     Collection to = getEmailAddresses(trackBack);

     try {

       MailUtils.sendMail(MailUtils.createSession(), blog, to, subject, message);

     } catch (Exception e) {

       e.printStackTrace();

     }

   }

   private Map<String, String[]> createMap(String... values) {

     Map<String, String[]> map = new HashMap<String, String[]>();

     for (int i = 0; i < values.length - 1; i += 2) {

       map.put(values[i], new String[]{values[i + 1]});

     }

     return map;

   }

   /**

    * Returns the collection of recipients.

    *

    * @param trackBack the TrackBack from the event

    * @return a Collection of e-mail addresses (Strings)

    */

   protected abstract Collection getEmailAddresses(TrackBack trackBack);

 }