/*

  * 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.view.impl;

 import com.sun.syndication.feed.synd.*;

 import net.sourceforge.pebble.Constants;

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

 import net.sourceforge.pebble.domain.*;

 import net.sourceforge.pebble.security.PebbleUserDetails;

 import java.util.*;

 /**

  * The view for the feed

  *

  * @author James Roper

  */

 public class FeedView extends AbstractRomeFeedView {

   public FeedView(FeedType feedType) {

     super(feedType);

   }

   @SuppressWarnings("unchecked")

   protected SyndFeed getFeed() {

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

     Collection<FeedDecorator> feedDecorators = Collections.emptyList();

     if (blog instanceof Blog) {

       feedDecorators = ((Blog) blog).getFeedDecorators();

     }

     Collection<BlogEntry> blogEntries = (Collection<BlogEntry>) getModel().get(Constants.BLOG_ENTRIES);

     SyndFeed syndFeed = new SyndFeedImpl();

     populateFeedInfo(blog, syndFeed);

     List<SyndEntry> feedEntries = new ArrayList<SyndEntry>();

     for (BlogEntry entry : blogEntries) {

       SyndEntry feedEntry = convertBlogEntry(blog, entry);

       for (FeedDecorator feedDecorator : feedDecorators) {

         feedDecorator.decorate(feedEntry, (Blog) blog, entry);

       }

       feedEntries.add(feedEntry);

     }

     syndFeed.setEntries(feedEntries);

     for (FeedDecorator feedDecorator : feedDecorators) {

       feedDecorator.decorate(syndFeed, (Blog) blog);

     }

     return syndFeed;

   }

   private SyndEntry convertBlogEntry(AbstractBlog blog, BlogEntry entry) {

     SyndEntry feedEntry = new SyndEntryImpl();

     feedEntry.setUri(generateId(blog, entry.getDate(), entry.getId()));

     feedEntry.setTitle(entry.getTitle());

     feedEntry.setLink(entry.getPermalink());

     PebbleUserDetails entryUser = entry.getUser();

     if (entryUser == null) {

       feedEntry.setAuthor(entry.getAuthor());

     } else {

       SyndPerson entryAuthor = new SyndPersonImpl();

       entryAuthor.setName(entryUser.getName());

       entryAuthor.setUri(entryUser.getWebsite());

       feedEntry.setAuthors(Collections.singletonList(entryAuthor));

     }

     feedEntry.setUpdatedDate(entry.getLastModified());

     feedEntry.setPublishedDate(entry.getDate());

     List<SyndCategory> feedCategories = new ArrayList<SyndCategory>();

     for (Category cat : entry.getCategories()) {

       SyndCategory feedCategory = new SyndCategoryImpl();

       feedCategory.setName(cat.getName());

       feedCategory.setTaxonomyUri(cat.getPermalink());

       feedCategories.add(feedCategory);

     }

     for (Tag entryTag : entry.getAllTags()) {

       SyndCategory feedCategory = new SyndCategoryImpl();

       feedCategory.setName(entryTag.getName());

       feedCategory.setTaxonomyUri(entryTag.getPermalink());

       feedCategories.add(feedCategory);

     }

     feedEntry.setCategories(feedCategories);

     SyndContent content = new SyndContentImpl();

     content.setType("text/html");

     if (entry.getExcerpt() == null || entry.getExcerpt().length() == 0) {

       content.setValue(entry.getBody());

     } else {

       content.setValue(entry.getExcerpt());

     }

     feedEntry.setContents(Collections.singletonList(content));

     if (entry.getAttachment() != null) {

       SyndEnclosure enclosure = new SyndEnclosureImpl();

       enclosure.setUrl(entry.getAttachment().getUrl());

       enclosure.setType(entry.getAttachment().getType());

       enclosure.setLength(entry.getAttachment().getSize());

       feedEntry.setEnclosures(Collections.singletonList(enclosure));

     }

     return feedEntry;

   }

   private void populateFeedInfo(AbstractBlog blog, SyndFeed syndFeed) {

     String blogUrl = blog.getUrl();

     Tag tag = (Tag) getModel().get("tag");

     Category category = (Category) getModel().get("category");

     String author = (String) getModel().get("author");

     String permalink;

     String feedAuthor = blog.getAuthor();

     String title = blog.getName();

     if (tag != null) {

       permalink = tag.getPermalink();

       title += tag.getName();

     } else if (category != null) {

       permalink = category.getPermalink();

       title += category.getName();

     } else if (author != null) {

       permalink = blogUrl + "authors/" + author;

       title += author;

     } else {

       permalink = blogUrl;

       syndFeed.setTitle(blog.getName());

     }

     String xmlLink;

     if (permalink.endsWith("/")) {

       xmlLink = permalink + getFeedType().getFileName();

     } else {

       xmlLink = permalink + "/" + getFeedType().getFileName();

     }

     syndFeed.setUri(generateId(blog, null, null));

     syndFeed.setTitle(title);

     syndFeed.setDescription(blog.getDescription());

     syndFeed.setLink(permalink);

     // Alternate link, used in favour of the above link for atom

     SyndLink alternate = new SyndLinkImpl();

     alternate.setHref(permalink);

     alternate.setRel("alternate");

     alternate.setType("text/html");

     SyndLink self = new SyndLinkImpl();

     self.setHref(xmlLink);

     self.setRel("self");

     self.setType(getFeedType().getContentType());

     syndFeed.setLinks(Arrays.asList(alternate, self));

     syndFeed.setPublishedDate(blog.getLastModified());

     syndFeed.setAuthor(feedAuthor);

     if (blog.getImage() != null) {

       SyndImage syndImage = new SyndImageImpl();

       syndImage.setUrl(blog.getImage());

       syndImage.setTitle(title);

       syndImage.setUrl(permalink);

       syndFeed.setImage(syndImage);

       // Unfortunately, ROME doesn't support the logo attribute for Atom in a feed agnostic way

     }

     syndFeed.setCopyright(feedAuthor);

     syndFeed.setLanguage(blog.getLanguage());

   }

 }