/** * 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.jtalks.jcommune.web.util.RssUtils; 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 newsComponents components of the RSS feed * @param feed news feed * @param request http request */ @Override protected void buildFeedMetadata(Map<String, Object> newsComponents, Channel feed, HttpServletRequest request) { Component component = (Component)newsComponents.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(newsComponents, feed, request); } /** * Set list data item news in RSS feed * * @param newsComponents components of the RSS feed * @param request http request * @param response http response * @return list items * @throws IOException i/o exception */ @Override protected List<Item> buildFeedItems(Map<String, Object> newsComponents, HttpServletRequest request, HttpServletResponse response) throws IOException { String url = buildURL(request); List<Topic> listContent = (List<Topic>) newsComponents.get("topics"); if (listContent == null) { response.sendRedirect(request.getContextPath() + "/errors/404"); return null; } List<Item> items = new ArrayList<>(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"); String postContent = topic.getLastPost().getPostContent(); postContent = RssUtils.skipInValidXMLChars(postContent); description.setValue(postContent); 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(); } }