CommentFeed.java

package net.spy.diggwatch;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;

import com.google.inject.Inject;

import net.spy.digg.Comment;
import net.spy.digg.DiggException;
import net.spy.digg.Story;
import net.spy.digg.User;
import net.spy.jwebkit.rss.RSSChannel;
import net.spy.jwebkit.rss.RSSItem;

public class CommentFeed extends RSSChannel {

	public static final String BASE_URL
		= "http://bleu.west.spy.net/diggwatch/";
	// Path means either user or domain
	protected final String path;
	private final Collection<Comment> comments;

	@Inject
	static DiggInterface di;

	public CommentFeed(String p, String title, Collection<Comment> c) {
		super(p + " @ digg", BASE_URL + "comments/" + p, title);
		path=p;
		comments = c;
	}

	@Override
	protected Collection<? extends RSSItem> getItems() {
		Collection<RSSItem> rv=new ArrayList<RSSItem>(
			comments.size());
		for(Comment c : comments) {
			try {
				try {
					Story s=di.getStory(c.getStoryId());
					rv.add(adaptComment(s, c));
				} catch(DiggException e) {
					getLogger().warn("Error fetching story %d (skipping it)",
						c.getStoryId(), e);
					// XXX:  magic number.  1008 == no such story
					if(e.getErrorId() != 1008) {
						throw e;
					}
				}
			} catch (Exception e) {
				throw new RuntimeException("Error making feed", e);
			}
		}
		return rv;
	}

	protected RSSItem adaptComment(Story s, Comment c) {
		return new CommentAdaptor(path, s, c);
	}

	public static class CommentAdaptor implements RSSItem {

		protected Story story=null;
		protected Comment comment=null;
		protected String path=null;

		public CommentAdaptor(String u, Story s, Comment c) {
			super();
			story=s;
			comment=c;
			path=u;
		}

		public String getDescription() {
			String rv=comment.getComment().replace("\n", "<br/>\n");
			if(!path.toLowerCase().equals(comment.getUser().toLowerCase())) {
				String icon="http://bleu.west.spy.net/diggwatch/icon/"
					+ comment.getUser();
				User user = di.getUserFromCache(comment.getUser());
				if(user != null) {
					icon=user.getIcon();
				}
				rv = "<img src=\"" + icon +  "\"/><br/>" + rv;
			}
			return rv;
		}

		public String getGuid() {
			return getLink();
		}

		public String getLink() {
			return story.getDiggLink() + "/?t=" + comment.getRoot()
				+ "#c" + comment.getEventId();
		}

		public Date getPubDate() {
			return new Date(comment.getTimestamp());
		}

		public String getTitle() {
			String rv=null;
			if(path.toLowerCase().equals(comment.getUser().toLowerCase())) {
				rv="your comment on ``" + story.getTitle() + "'' (+"
					+ comment.getDiggsUp() + "/-" + comment.getDiggsDown()
					+ ")";
			} else {
				rv="possible reply to comment on ``"
					+ story.getTitle() + "'' by " + comment.getUser() + " (+"
					+ comment.getDiggsUp() + "/-" + comment.getDiggsDown()
					+ ")";
			}
			return rv;
		}

	}
}