/*

  * 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.blogentry;

 import net.sourceforge.pebble.api.decorator.ContentDecoratorContext;

 import net.sourceforge.pebble.api.event.blogentry.BlogEntryEvent;

 import net.sourceforge.pebble.domain.Blog;

 import net.sourceforge.pebble.domain.BlogEntry;

 import net.sourceforge.pebble.util.MailUtils;

 import javax.mail.Session;

 import java.text.SimpleDateFormat;

 import java.util.List;

 /**

  * Sends an e-mail notification to e-mail subscribers when new blog entries

  * are added.

  *

  * @author Simon Brown

  */

 public class EmailSubscriptionListener extends BlogEntryListenerSupport {

   /** a token to be replaced when sending e-mails */

   private static final String EMAIL_ADDRESS_TOKEN = "EMAIL_ADDRESS";

   /**

    * Called when a blog entry has been published.

    *

    * @param event a BlogEntryEvent instance

    */

   public void blogEntryPublished(BlogEntryEvent event) {

     BlogEntry blogEntry = event.getBlogEntry();

     sendNotification((BlogEntry)blogEntry.clone());

   }

   private void sendNotification(BlogEntry blogEntry) {

     Blog blog = blogEntry.getBlog();

     // first of all decorate the blog entry, as if it was being rendered

     // via a HTML page or XML feed

     ContentDecoratorContext context = new ContentDecoratorContext();

     context.setView(ContentDecoratorContext.DETAIL_VIEW);

     context.setMedia(ContentDecoratorContext.EMAIL);

     blog.getContentDecoratorChain().decorate(context, blogEntry);

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

     sdf.setTimeZone(blog.getTimeZone());

     String subject = MailUtils.getBlogEntryPrefix(blog) + " " + blogEntry.getTitle();

     String message = "<a href=\"" + blogEntry.getLocalPermalink() + "\">Blog entry</a> posted by " + (blogEntry.getUser() != null ? blogEntry.getUser().getName() : blogEntry.getAuthor()) + " on " + sdf.format(blogEntry.getDate());

     message += "\n<br>";

     if (blogEntry.getExcerpt() != null && blogEntry.getExcerpt().trim().length() > 0) {

       message += blogEntry.getExcerpt();

     } else {

       message += blogEntry.getBody();

     }

     message += "\n<br>";

     message += "<a href=\"" + blogEntry.getLocalPermalink() + "\">Permalink</a>";

     message += " | ";

     message += "<a href=\"" + blog.getUrl() + "unsubscribe.action?email=" + EMAIL_ADDRESS_TOKEN + "\">Opt-out</a>";

     List<String> to = blog.getEmailSubscriptionList().getEmailAddresses();

     // now send personalized e-mails to the blog owner and everybody

     // that left a comment specifying their e-mail address

     try {

       Session session = MailUtils.createSession();

       for (String emailAddress : to) {

         // customize the opt-out link and send the message

         MailUtils.sendMail(session, blog, emailAddress, subject,

             message.replaceAll(EMAIL_ADDRESS_TOKEN, emailAddress));

       }

     } catch (Exception e) {

         e.printStackTrace();

     } catch (NoClassDefFoundError e) {

         // most likely: JavaMail is not in classpath

         e.printStackTrace();

     }

   }

 }