/*
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 */

package services;

import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.XmlReader;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;

/**
 *
 * @author outcastgeek
 */
public class FeedsServiceImpl implements FeedsService {

    private static final Logger LOGGER = Logger.getLogger(FeedsServiceImpl.class);

    public List<Feed> getFeedsFromSource(String source) {
        LOGGER.info("Fetching feed from source: " + source);
        List<Feed> feeds = new ArrayList<Feed>();
        try {
            final URL url = new URL(source);
            final SyndFeedInput syndFeedInput = new SyndFeedInput();
            final SyndFeed downloadedFeed = syndFeedInput.build(new XmlReader(url));
            for (SyndEntry syndEntry : (List<SyndEntry>) downloadedFeed.getEntries()) {
                Feed feed = new Feed();
                feed.setAuthor(syndEntry.getAuthor());
                feed.setTitle(syndEntry.getTitle());
                feed.setDescription(syndEntry.getDescription().getValue());
                feed.setLink(syndEntry.getLink());
                feed.setPubDate(syndEntry.getPublishedDate());
                LOGGER.info("Author: " + feed.getAuthor());
                LOGGER.info("Title: " + feed.getTitle());
                LOGGER.info("Description: " + feed.getDescription());
                LOGGER.info("Link: " + feed.getLink());
                LOGGER.info("Date: " + feed.getPubDate());
                feeds.add(feed);
            }
        } catch (MalformedURLException e) {
            LOGGER.error("Failed to retrieve feeds from this source: " + source + "\nwith error: " + e);
        } catch (IOException e) {
            LOGGER.error("Failed to retrieve feeds from this source: " + source + "\nwith error: " + e);
        } catch (FeedException e) {
            LOGGER.error("Failed to retrieve feeds from this source: " + source + "\nwith error: " + e);
        }
        LOGGER.info("Successfully retrieved feeds: " + feeds);
        return feeds;
    }

    public List<Feed> getAllFeedsFromSources(List<String> sources) {
        LOGGER.info("Fetching all feeds from sources: " + sources);
        List feeds = new ArrayList<Feed>();
        for (String source : sources) {
            feeds.addAll(getFeedsFromSource(source));
        }
        LOGGER.info("Done fetching all feeds");
        return feeds;
    }
}