markreadaction.java

jGossip是一个简单而功能强大的Java论坛软件（消息板）

/*
 * $Id: MarkReadAction.java,v 1.4 2004/05/31 07:51:15 bel70 Exp $
 *
 * ***** BEGIN LICENSE BLOCK *****
 * 
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * The Original Code is JGossip forum code.
 *
 * The Initial Developer of the Original Code is the JResearch, Org.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *              Dmitriy Belov <[e-mail]>
 *               .
 * * ***** END LICENSE BLOCK ***** */
/*
 * Created on 01.05.2004
 *
 */
package org.jresearch.gossip.actions.forum;

import java.sql.SQLException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.jresearch.gossip.IConst;
import org.jresearch.gossip.beans.user.User;
import org.jresearch.gossip.dao.ForumDAO;
import org.jresearch.gossip.exception.SystemException;
import org.jresearch.gossip.forms.ProcessForumForm;


/**
 * DOCUMENT ME!
 *
 * @author Dmitry Belov
 */
public class MarkReadAction extends Action {
    /**
     * DOCUMENT ME!
     *
     * @param mapping DOCUMENT ME!
     * @param form DOCUMENT ME!
     * @param request DOCUMENT ME!
     * @param response DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     *
     * @throws Exception DOCUMENT ME!
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response)
        throws Exception {
        ForumDAO dao = ForumDAO.getInstance();
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute(IConst.SESSION.USER_KEY);
        List updatedTopics = null;
        ActionForward forward = null;
        String fid =  ((ProcessForumForm) form).getFid();

        try {
            dao.setDataSource(getDataSource(request));

            if (fid.equals("")) {
                updatedTopics = dao.getUpdatedTopics(user);
                forward = mapping.findForward("welcome");
            } else {
                updatedTopics = dao.getUpdatedTopics(user, Integer.parseInt(fid));
                forward = new ActionForward("/ShowForum.do?fid=" + fid, true);
            }

            Iterator it = updatedTopics.iterator();

            HashMap lastIntimeMap = (HashMap) session.getAttribute(IConst.SESSION.LAST_INTIME);
            Date now = dao.now();

            while (it.hasNext()) {
                updateLastVisitTime(lastIntimeMap, (String) it.next(), now);
            }
        } catch (SQLException sqle) {
            getServlet().log("Connection.process", sqle);
            throw new SystemException(sqle);
        }

        return (forward);
    }

    //	set(update) last visit date for topic 
    private void updateLastVisitTime(HashMap last_intime, String tid, Date now) {
        if (last_intime.containsKey(tid)) {
            last_intime.remove(tid);
        }

        last_intime.put(tid, now);
    }
}