com.liferay.portlet.activities.action.RSSAction.java Source code

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Here is the source code for com.liferay.portlet.activities.action.RSSAction.java

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/**
 * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
 *
 * 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.
 */

package com.liferay.portlet.activities.action;

import com.liferay.portal.kernel.exception.SystemException;
import com.liferay.portal.kernel.util.ContentTypes;
import com.liferay.portal.kernel.util.HtmlUtil;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.model.Group;
import com.liferay.portal.service.GroupLocalServiceUtil;
import com.liferay.portal.struts.PortletAction;
import com.liferay.portal.theme.ThemeDisplay;
import com.liferay.portal.util.Portal;
import com.liferay.portal.util.PortalUtil;
import com.liferay.portal.util.WebKeys;
import com.liferay.portlet.social.model.SocialActivity;
import com.liferay.portlet.social.model.SocialActivityFeedEntry;
import com.liferay.portlet.social.service.SocialActivityInterpreterLocalServiceUtil;
import com.liferay.portlet.social.service.SocialActivityLocalServiceUtil;
import com.liferay.util.RSSUtil;

import com.sun.syndication.feed.synd.SyndContent;
import com.sun.syndication.feed.synd.SyndContentImpl;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndEntryImpl;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndFeedImpl;
import com.sun.syndication.io.FeedException;

import edu.emory.mathcs.backport.java.util.Collections;

import java.io.OutputStream;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.portlet.PortletConfig;
import javax.portlet.PortletRequest;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/**
 * @author Brian Wing Shun Chan
 * @author Vilmos Papp
 */
public class RSSAction extends PortletAction {

    @Override
    public void serveResource(ActionMapping mapping, ActionForm form, PortletConfig portletConfig,
            ResourceRequest resourceRequest, ResourceResponse resourceResponse) throws Exception {

        resourceResponse.setContentType(ContentTypes.TEXT_XML_UTF8);

        OutputStream outputStream = resourceResponse.getPortletOutputStream();

        try {
            byte[] bytes = getRSS(resourceRequest);

            outputStream.write(bytes);
        } finally {
            outputStream.close();
        }
    }

    protected List<SocialActivity> getActivities(PortletRequest portletRequest) throws Exception {

        ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY);

        Group group = GroupLocalServiceUtil.getGroup(themeDisplay.getScopeGroupId());

        int start = 0;
        int end = 10;

        if (group.isOrganization()) {
            return SocialActivityLocalServiceUtil.getOrganizationActivities(group.getOrganizationId(), start, end);
        } else if (group.isRegularSite()) {
            return SocialActivityLocalServiceUtil.getGroupActivities(group.getGroupId(), start, end);
        } else if (group.isUser()) {
            return SocialActivityLocalServiceUtil.getUserActivities(group.getClassPK(), start, end);
        }

        return Collections.emptyList();
    }

    protected byte[] getRSS(PortletRequest portletRequest) throws Exception {
        ThemeDisplay themeDisplay = (ThemeDisplay) portletRequest.getAttribute(WebKeys.THEME_DISPLAY);

        SyndFeed syndFeed = new SyndFeedImpl();

        String feedTitle = ParamUtil.getString(portletRequest, "feedTitle");

        syndFeed.setDescription(feedTitle);

        syndFeed.setFeedType(RSSUtil.FEED_TYPE_DEFAULT);

        String feedLink = PortalUtil.getLayoutFullURL(themeDisplay) + Portal.FRIENDLY_URL_SEPARATOR
                + "activities/rss";

        syndFeed.setLink(feedLink);

        syndFeed.setTitle(feedTitle);

        List<SyndEntry> syndEntries = new ArrayList<SyndEntry>();

        syndFeed.setEntries(syndEntries);

        List<SocialActivity> activities = getActivities(portletRequest);

        for (SocialActivity activity : activities) {
            SocialActivityFeedEntry activityFeedEntry = SocialActivityInterpreterLocalServiceUtil
                    .interpret(activity, themeDisplay);

            if (activityFeedEntry == null) {
                continue;
            }

            SyndEntry syndEntry = new SyndEntryImpl();

            SyndContent syndContent = new SyndContentImpl();

            syndContent.setType(RSSUtil.FEED_TYPE_DEFAULT);
            syndContent.setValue(activityFeedEntry.getBody());

            syndEntry.setDescription(syndContent);

            if (Validator.isNotNull(activityFeedEntry.getLink())) {
                syndEntry.setLink(activityFeedEntry.getLink());
            }

            syndEntry.setPublishedDate(new Date(activity.getCreateDate()));
            syndEntry.setTitle(HtmlUtil.extractText(activityFeedEntry.getTitle()));

            syndEntries.add(syndEntry);
        }

        String rss = StringPool.BLANK;

        try {
            rss = RSSUtil.export(syndFeed);
        } catch (FeedException fe) {
            throw new SystemException(fe);
        }

        return rss.getBytes(StringPool.UTF8);
    }

    @Override
    protected boolean isCheckMethodOnProcessAction() {
        return _CHECK_METHOD_ON_PROCESS_ACTION;
    }

    private static final boolean _CHECK_METHOD_ON_PROCESS_ACTION = false;

}