getmessageaction.java

jGossip是一个简单而功能强大的Java论坛软件（消息板）

/*
 * $$Id: GetMessageAction.java,v 1.5 2004/06/16 13:21:43 bel70 Exp $$
 * 
 * ***** 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): Dmitry Belov <[e-mail]>
 * 
 * ***** END LICENSE BLOCK *****
 */
/*
 * Created on Sep 25, 2003
 *  
 */
package org.jresearch.gossip.actions.message;
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.actions.BaseAction;
import org.jresearch.gossip.beans.forum.Forum;
import org.jresearch.gossip.beans.forum.Message;
import org.jresearch.gossip.beans.forum.Topic;
import org.jresearch.gossip.beans.user.User;
import org.jresearch.gossip.configuration.Configurator;
import org.jresearch.gossip.dao.ForumDAO;
import org.jresearch.gossip.exception.SystemException;
import org.jresearch.gossip.forms.MessageForm;
import org.jresearch.gossip.forms.ProcessMessageForm;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
 * DOCUMENT ME!
 * 
 * @author Bel
 */
public abstract class GetMessageAction extends BaseAction {
	/**
	 * DOCUMENT ME!
	 * 
	 * @param mapping
	 *            DOCUMENT ME!
	 * @param form
	 *            DOCUMENT ME!
	 * @param request
	 *            DOCUMENT ME!
	 * @param response
	 *            DOCUMENT ME!
	 * 
	 * @return DOCUMENT ME!
	 */
	public ActionForward process(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws SystemException {
		HttpSession session = request.getSession();
		MessageForm messageForm = new MessageForm();
		ProcessMessageForm pmForm = (ProcessMessageForm) form;
		ForumDAO dao = ForumDAO.getInstance();
		User user = (User) session.getAttribute(IConst.SESSION.USER_KEY);
		try {
			dao.setDataSource(getDataSource(request));
			int fid = Integer.parseInt(pmForm.getFid());
			boolean isUserMod = dao.checkMod(fid, user);
			Forum currForum = dao.getForumInfo(fid);
			//			check access rights if forum invisible
			getServlet().log("check access rights if forum invisible");
			if ((currForum.getLocked() == IConst.Forum.STATUS_INVISIBLE)
					&& (user.getStatus() < Integer.parseInt(Configurator
							.getInstance().get(IConst.CONFIG.INVADER1)))) {
				return (mapping.findForward("jgossip-denied"));
			}
			Topic currThread = dao.getThreadInfo(Integer.parseInt(pmForm
					.getTid()));
			// check user access rights if current topic or completely forum is
			// locked
			getServlet()
					.log(
							"check user access rights if current topic or completely forum is locked");
			if (((currThread.getLocked() == IConst.Topic.STATUS_LOCKED) || (currForum
					.getLocked() == IConst.Forum.STATUS_COMPLETELY_LOCKED))
					&& (!isUserMod)) {
				return (mapping.findForward("jgossip-denied"));
			}
			session.setAttribute(IConst.REQUEST.CURR_THREAD, currThread);
			currThread.setSubject(dao.getThreadSubject(pmForm.getTid()));
			Message mess = dao.getMessage(pmForm.getMid());
			if (mess == null) {
				return (new ActionForward("/ShowThread.do?fid="
						+ pmForm.getFid() + "&tid=" + pmForm.getTid()
						+ "&block=" + pmForm.getBlock(), true));
			} else {
				String fname = fillMessageForm(messageForm, mess, pmForm,
						request);
				request.setAttribute(fname, messageForm);
			}
		} catch (SQLException sqle) {
			getServlet().log("Connection.process", sqle);
			throw new SystemException(sqle);
		}
		return (mapping.findForward("page"));
	}
	/**
	 * Fill message form and specify it's name in request scope
	 * 
	 * @param messageForm
	 * @param mess
	 * @param form
	 * @param request
	 * 
	 * @return name of request attribute which will store messageForm
	 */
	abstract protected String fillMessageForm(MessageForm messageForm,
			Message mess, ProcessMessageForm form, HttpServletRequest request);
}