358 lines
11 KiB
Java
358 lines
11 KiB
Java
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/*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is the Venice Web Communities System.
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*
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* The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
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* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
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* Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
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*
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* Contributor(s):
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*/
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package com.silverwrist.venice.servlets;
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import java.io.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import org.apache.log4j.*;
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import com.silverwrist.util.StringUtil;
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import com.silverwrist.venice.ValidationException;
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import com.silverwrist.venice.core.*;
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import com.silverwrist.venice.servlets.format.*;
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public class TopicOperations extends VeniceServlet
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{
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/*--------------------------------------------------------------------------------
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* Static data members
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*--------------------------------------------------------------------------------
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*/
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private static final String DELETE_CONFIRM_ATTR = "servlets.TopicOperations.delete.confirm";
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private static final String DELETE_CONFIRM_PARAM = "confirm";
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private static Category logger = Category.getInstance(TopicOperations.class.getName());
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/*--------------------------------------------------------------------------------
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* Internal functions
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*--------------------------------------------------------------------------------
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*/
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private static SIGContext getSIGParameter(ServletRequest request, UserContext user)
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throws ValidationException, DataException
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{
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String str = request.getParameter("sig");
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if (str==null)
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{ // no SIG parameter - bail out now!
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logger.error("SIG parameter not specified!");
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throw new ValidationException("No SIG specified.");
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} // end if
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try
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{ // turn the string into a SIGID, and thence to a SIGContext
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int sigid = Integer.parseInt(str);
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return user.getSIGContext(sigid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert SIG parameter '" + str + "'!");
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throw new ValidationException("Invalid SIG parameter.");
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} // end catch
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} // end getSIGParameter
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private static ConferenceContext getConferenceParameter(ServletRequest request, SIGContext sig)
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throws ValidationException, DataException, AccessError
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{
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String str = request.getParameter("conf");
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if (str==null)
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{ // no conference parameter - bail out now!
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logger.error("Conference parameter not specified!");
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throw new ValidationException("No conference specified.");
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} // end if
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try
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{ // turn the string into a ConfID, and thence to a ConferenceContext
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int confid = Integer.parseInt(str);
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return sig.getConferenceContext(confid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert conference parameter '" + str + "'!");
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throw new ValidationException("Invalid conference parameter.");
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} // end catch
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} // end getConferenceParameter
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private static TopicContext getTopicParameter(ServletRequest request, ConferenceContext conf)
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throws ValidationException, DataException, AccessError
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{
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String str = request.getParameter("top");
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if (StringUtil.isStringEmpty(str))
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{ // no topic parameter - bail out now!
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logger.error("Topic parameter not specified!");
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throw new ValidationException("No topic specified.");
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} // end if
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try
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{ // turn the string into a TopicID, and thence to a TopicContext
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short topicid = Short.parseShort(str);
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return conf.getTopic(topicid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert topic parameter '" + str + "'!");
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throw new ValidationException("Invalid topic parameter.");
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} // end catch
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} // end getTopicParameter
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/*--------------------------------------------------------------------------------
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* Overrides from class HttpServlet
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*--------------------------------------------------------------------------------
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*/
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public String getServletInfo()
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{
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String rc = "TopicOperations servlet - General topic operations (freeze, archive, etc.)\n"
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+ "Part of the Venice Web Communities System\n";
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return rc;
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} // end getServletInfo
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public void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException
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{
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UserContext user = getUserContext(request);
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RenderData rdat = createRenderData(request,response);
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String location = "top";
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String locator = null;
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String page_title = null;
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Object content = null;
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SIGContext sig = null; // SIG context
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ConferenceContext conf = null; // conference context
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TopicContext topic = null; // topic context
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try
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{ // this outer try is to catch ValidationException
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try
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{ // all commands require a SIG parameter
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sig = getSIGParameter(request,user);
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changeMenuSIG(request,sig);
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if (logger.isDebugEnabled())
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logger.debug("found SIG #" + String.valueOf(sig.getSIGID()));
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locator = "sig=" + String.valueOf(sig.getSIGID());
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location = "sigprofile?" + locator;
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} // end try
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catch (DataException de)
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{ // error looking up the SIG
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding SIG: " + de.getMessage(),location);
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} // end catch
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if (content==null)
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{ // we got the SIG parameter OK
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try
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{ // all commands require a conference parameter
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conf = getConferenceParameter(request,sig);
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if (logger.isDebugEnabled())
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logger.debug("found conf #" + String.valueOf(conf.getConfID()));
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locator += "&conf=" + String.valueOf(conf.getConfID());
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location = "confdisp?" + locator;
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} // end try
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catch (DataException de)
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{ // error looking up the conference
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding conference: " + de.getMessage(),location);
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} // end catch
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} // end if
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if (content==null)
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{ // we got the conference parameter OK
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try
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{ // now we need a topic parameter
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topic = getTopicParameter(request,conf);
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if (logger.isDebugEnabled())
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logger.debug("found topic #" + String.valueOf(topic.getTopicID()));
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locator += "&top=" + String.valueOf(topic.getTopicNumber());
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location = "confdisp?" + locator;
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} // end try
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catch (DataException de)
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{ // error looking up the conference
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding topic: " + de.getMessage(),location);
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} // end catch
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} // end if
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} // end try
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catch (ValidationException ve)
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{ // these all get handled in pretty much the same way
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page_title = "Error";
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content = new ErrorBox(null,ve.getMessage(),location);
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} // end catch
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catch (AccessError ae)
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{ // these all get handled in pretty much the same way
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),location);
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} // end catch
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if (content==null)
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{ // figure out what command we want to perform...
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String cmd = request.getParameter("cmd");
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if (cmd==null)
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cmd = "???";
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if (cmd.equals("HY") || cmd.equals("HN"))
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{ // we want to set the hide status of the topic
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try
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{ // call down to set the topic!
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topic.setHidden(cmd.equals("HY"));
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// go back to the topic view
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rdat.redirectTo(location);
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return;
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} // end try
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catch (DataException de)
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{ // there was a database error
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error setting hide status: " + de.getMessage(),location);
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} // end catch
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} // end if ("hide" or "show")
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else if (cmd.equals("FY") || cmd.equals("FN"))
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{ // we want to set the frozen status of the topic
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try
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{ // call down to set the topic!
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topic.setFrozen(cmd.equals("FY"));
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// go back to the topic view
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rdat.redirectTo(location);
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return;
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} // end try
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catch (DataException de)
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{ // there was a database error
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error setting freeze status: " + de.getMessage(),
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location);
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} // end catch
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catch (AccessError ae)
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{ // naughty naughty = you can't do this!
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),location);
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} // end catch
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} // end else if ("freeze" or "unfreeze")
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else if (cmd.equals("AY") || cmd.equals("AN"))
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{ // we want to change the archived status of the topic
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try
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{ // call down to set the topic!
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topic.setArchived(cmd.equals("AY"));
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// go back to the topic view
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rdat.redirectTo(location);
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return;
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} // end try
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catch (DataException de)
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{ // there was a database error
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error setting archive status: " + de.getMessage(),
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location);
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} // end catch
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catch (AccessError ae)
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{ // naughty naughty = you can't do this!
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),location);
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} // end catch
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} // end else if ("archive" or "unarchive")
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else if (cmd.equals("DEL"))
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{ // we need confirmation on this operation!
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if (ConfirmBox.isConfirmed(request,DELETE_CONFIRM_ATTR,DELETE_CONFIRM_PARAM))
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{ // OK, go ahead, delete the topic!
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location = "confdisp?sig=" + String.valueOf(sig.getSIGID()) + "&conf="
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+ String.valueOf(conf.getConfID());
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try
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{ // delete the bloody topic!
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topic.delete();
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// after which, redirect to conference view
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rdat.redirectTo(location);
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return;
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} // end try
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catch (DataException de)
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{ // there was a database error
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error deleting topic: " + de.getMessage(),location);
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} // end catch
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catch (AccessError ae)
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{ // naughty naughty = you can't do this!
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),location);
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} // end catch
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} // end if
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else
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{ // not a proper confirmation - better display one
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String message = "You are about to delete topic " + String.valueOf(topic.getTopicNumber())
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+ " from the \"" + conf.getName() + "\" conference! Are you sure you want to do this?";
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String confirm_url = "topicops?" + locator + "&cmd=DEL";
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page_title = "Delete Topic";
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content = new ConfirmBox(request,DELETE_CONFIRM_ATTR,DELETE_CONFIRM_PARAM,page_title,
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message,confirm_url,location);
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} // end else
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} // end else if ("delete")
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else
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{ // unrecognized command
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page_title = "Internal Error";
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logger.error("invalid command to TopicOperations.doGet: " + cmd);
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content = new ErrorBox(page_title,"Invalid command to TopicOperations.doGet",location);
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} // end else
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} // end if
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BaseJSPData basedat = new BaseJSPData(page_title,location,content);
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basedat.transfer(getServletContext(),rdat);
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} // end doGet
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} // end class TopicOperations
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