/**
* Copyright (C) 2011 JTalks.org Team
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jtalks.jcommune.web.view;
import com.sun.syndication.feed.rss.Channel;
import com.sun.syndication.feed.rss.Content;
import com.sun.syndication.feed.rss.Description;
import com.sun.syndication.feed.rss.Item;
import org.jtalks.common.model.entity.Component;
import org.jtalks.jcommune.model.entity.Topic;
import org.springframework.web.servlet.view.feed.AbstractRssFeedView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Class forms a RSS feed view.
*
* @author Andrey Kluev
*/
public class RssViewer extends AbstractRssFeedView {
private static final String DEFAULT_FEED_TITLE = "";
private static final String DEFAULT_FEED_DESCRIPTION = "";
/**
* Set meta data for all RSS feed
*
* @param model news model
* @param feed news feed
* @param request http request
*/
@Override
protected void buildFeedMetadata(Map<String, Object> model, Channel feed,
HttpServletRequest request) {
Component component = (Component)model.get("forumComponent");
String feedTitle = DEFAULT_FEED_TITLE;
String feedDescription = DEFAULT_FEED_DESCRIPTION;
if (component != null) {
feedTitle = component.getName();
feedDescription = component.getDescription();
}
feed.setTitle(feedTitle);
feed.setDescription(feedDescription);
feed.setLink(buildURL(request));
super.buildFeedMetadata(model, feed, request);
}
/**
* Set list data item news in RSS feed
*
* @param model news model
* @param request http request
* @param response http response
* @return list items
* @throws IOException i/o exception
*/
@Override
protected List<Item> buildFeedItems(Map<String, Object> model,
HttpServletRequest request, HttpServletResponse response)
throws IOException {
String url = buildURL(request);
List<Topic> listContent = (List<Topic>) model.get("topics");
if (listContent == null) {
response.sendRedirect(request.getContextPath() + "/errors/404");
return null;
}
List<Item> items = new ArrayList<Item>(listContent.size());
for (Topic topic : listContent) {
items.add(createFeedItem(topic, url));
}
response.setContentType(getContentType());
return items;
}
/**
* Create news item
*
* @param topic news topic
* @param url building URL
* @return item for news feed
*/
private Item createFeedItem(Topic topic, String url) {
Item item = new Item();
Description description = new Description();
description.setType("text");
description.setValue(topic.getLastPost().getPostContent());
Content content = new Content();
item.setContent(content);
item.setTitle(topic.getTitle());
item.setAuthor(topic.getLastPost().getUserCreated().getUsername());
item.setLink(url + "/posts/" + topic.getLastPost().getId());
item.setComments(topic.getTopicStarter().getSignature());
item.setDescription(description);
item.setPubDate(topic.getModificationDate().toDate());
return item;
}
/**
* The implementation of building url
*
* @param request HttpServletRequest
* @return url
*/
private String buildURL(HttpServletRequest request) {
return request.getScheme()
+ "://" + request.getServerName()
+ ":" + request.getServerPort()
+ request.getContextPath();
}
}