ubic.gemma.web.feed.FeedReader.java Source code

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Here is the source code for ubic.gemma.web.feed.FeedReader.java

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/*
 * The Gemma project
 * 
 * Copyright (c) 2008 University of British Columbia
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package ubic.gemma.web.feed;

import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.fetcher.FeedFetcher;
import com.sun.syndication.fetcher.impl.FeedFetcherCache;
import com.sun.syndication.fetcher.impl.HashMapFeedInfoCache;
import com.sun.syndication.fetcher.impl.HttpURLFeedFetcher;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Controller;
import ubic.gemma.persistence.util.Settings;

import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author paul
 *
 */
@Controller
public class FeedReader implements InitializingBean {

    private static final String GEMMA_HOME_FEEDURL_CONFIG_PARAM = "gemma.home.feedurl";

    private static final String DEFAULT_FEED = "http://wiki.pavlab.msl.ubc.ca/spaces/createrssfeed.action?types=blogpost&spaces=gemma&maxResults=1&title=Gemma+News&publicFeed=true&timeSpan=600";

    FeedFetcher feedFetcher;
    String feedUrl;

    @Override
    public void afterPropertiesSet() {
        FeedFetcherCache feedInfoCache = HashMapFeedInfoCache.getInstance();
        feedFetcher = new HttpURLFeedFetcher(feedInfoCache);
        this.feedUrl = Settings.getString(GEMMA_HOME_FEEDURL_CONFIG_PARAM);
        if (StringUtils.isBlank(feedUrl)) {
            this.feedUrl = DEFAULT_FEED;
        }
    }

    /**
     * @return List of news items in HTML format.
     */
    public List<NewsItem> getLatestNews() {

        /*
         * reformat the feed.
         */
        Pattern authorP = Pattern.compile("<p>.*?News Item.*?<b>(edited|added)</b>.*?by.*?<a.*?</p>",
                Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
        Pattern footerP = Pattern.compile("<div style=.?padding: 10px 0;.*?View Online</a>.*?</div>",
                Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
        Pattern borderP = Pattern.compile("border-top: 1px solid #ddd; border-bottom: 1px solid #ddd;");
        List<NewsItem> result = new ArrayList<NewsItem>();
        try {
            SyndFeed feed = feedFetcher.retrieveFeed(new URL(feedUrl));

            for (SyndEntry k : (Collection<SyndEntry>) feed.getEntries()) {
                NewsItem n = new NewsItem();

                /*
                 * This code is specific for confluence feeds.
                 */
                String title = k.getTitle();

                String body = k.getDescription().getValue();
                Matcher m = authorP.matcher(body);
                body = m.replaceAll("");

                Matcher b = borderP.matcher(body);
                body = b.replaceAll("");

                /*
                 * Confluence-specific
                 */
                Matcher footerMatch = footerP.matcher(body);
                body = footerMatch.replaceAll("");

                n.setBody(body);
                n.setTitle(title);

                n.setDate(k.getPublishedDate());

                result.add(n);
            }
        } catch (Exception e) {
            NewsItem n = new NewsItem();
            n.setTitle("No news");
            n.setBody("");
        }
        return result;

    }
}