/*
* 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.action;
import net.sourceforge.pebble.Constants;
import net.sourceforge.pebble.comparator.BlogEntryComparator;
import net.sourceforge.pebble.domain.*;
import net.sourceforge.pebble.service.LastModifiedService;
import net.sourceforge.pebble.web.view.NotModifiedView;
import net.sourceforge.pebble.web.view.View;
import net.sourceforge.pebble.web.view.impl.AbstractRomeFeedView;
import net.sourceforge.pebble.web.view.impl.FeedView;
import net.sourceforge.pebble.web.view.impl.RdfView;
import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;
/**
* Gets the RSS for a blog.
*
* @author Simon Brown
*/
public class FeedAction extends Action {
@Inject
private LastModifiedService lastModifiedService;
/**
* Peforms the processing associated with this action.
*
* @param request the HttpServletRequest instance
* @param response the HttpServletResponse instance
* @return the name of the next view
*/
public View process(HttpServletRequest request, HttpServletResponse response) throws ServletException {
AbstractBlog blog = (AbstractBlog) getModel().get(Constants.BLOG_KEY);
String flavor = request.getParameter("flavor");
if (lastModifiedService.checkAndProcessLastModified(request, response, blog.getLastModified(), null)) {
return new NotModifiedView();
}
List<BlogEntry> blogEntries;
String s = request.getParameter("includeAggregatedContent");
boolean includeAggregatedContent = (s == null || s.equalsIgnoreCase("true"));
if (blog instanceof Blog) {
Tag tag = getTag((Blog) blog, request);
Category category = getCategory((Blog) blog, request);
String author = getAuthor(request);
if (tag != null) {
blogEntries = ((Blog) blog).getRecentPublishedBlogEntries(tag);
getModel().put("tag", tag);
} else if (category != null) {
blogEntries = ((Blog) blog).getRecentPublishedBlogEntries(category);
getModel().put("category", category);
} else if (author != null) {
blogEntries = ((Blog) blog).getRecentPublishedBlogEntries(author);
getModel().put("author", author);
} else {
blogEntries = ((Blog) blog).getRecentPublishedBlogEntries();
}
} else {
blogEntries = blog.getRecentBlogEntries();
}
List<BlogEntry> blogEntriesForFeed = new ArrayList<BlogEntry>();
for (BlogEntry entry : blogEntries) {
if (includeAggregatedContent || !entry.isAggregated()) {
blogEntriesForFeed.add(entry);
}
}
Collections.sort(blogEntriesForFeed, new BlogEntryComparator());
getModel().put(Constants.BLOG_ENTRIES, blogEntriesForFeed);
// set the locale of this feed request to be English
javax.servlet.jsp.jstl.core.Config.set(
request,
javax.servlet.jsp.jstl.core.Config.FMT_LOCALE,
Locale.ENGLISH);
if (flavor != null && flavor.equalsIgnoreCase("atom")) {
return new FeedView(AbstractRomeFeedView.FeedType.ATOM);
} else if (flavor != null && flavor.equalsIgnoreCase("rdf")) {
return new RdfView();
} else {
return new FeedView(AbstractRomeFeedView.FeedType.RSS);
}
}
/**
* Helper method to find a named tag from a request parameter.
*
* @param blog the blog for which the feed is for
* @param request the HTTP request containing the tag parameter
* @return a Tag instance, or null if the tag isn't
* specified or can't be found
*/
private Tag getTag(Blog blog, HttpServletRequest request) {
String tag = request.getParameter("tag");
if (tag != null) {
return new Tag(tag, blog);
} else {
return null;
}
}
/**
* Helper method to find a named category from a request parameter.
*
* @param blog the blog for which the feed is for
* @param request the HTTP request containing the category parameter
* @return a Category instance, or null if the category isn't
* specified or can't be found
*/
private Category getCategory(Blog blog, HttpServletRequest request) {
String categoryId = request.getParameter("category");
if (categoryId != null) {
return blog.getCategory(categoryId);
} else {
return null;
}
}
/**
* Helper method to find a named author from a request parameter.
*
* @param request the HTTP request containing the tag parameter
* @return a String username, or null if the author isn't specified
*/
private String getAuthor(HttpServletRequest request) {
return request.getParameter("author");
}
public void setLastModifiedService(LastModifiedService lastModifiedService) {
this.lastModifiedService = lastModifiedService;
}
}