/*
* 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 .
*
* 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 the Venice Web Communities System.
*
* The Initial Developer of the Original Code is Eric J. Bowersox ,
* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
* Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
*
* Contributor(s):
*/
package com.silverwrist.venice.servlets;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.log4j.*;
import com.silverwrist.venice.ValidationException;
import com.silverwrist.venice.core.*;
import com.silverwrist.venice.servlets.format.*;
public class ConfOperations extends VeniceServlet
{
/*--------------------------------------------------------------------------------
* Static data members
*--------------------------------------------------------------------------------
*/
private static Category logger = Category.getInstance(ConfOperations.class.getName());
/*--------------------------------------------------------------------------------
* Internal functions
*--------------------------------------------------------------------------------
*/
private static SIGContext getSIGParameter(ServletRequest request, UserContext user)
throws ValidationException, DataException
{
String str = request.getParameter("sig");
if (str==null)
{ // no SIG parameter - bail out now!
logger.error("SIG parameter not specified!");
throw new ValidationException("No SIG specified.");
} // end if
try
{ // turn the string into a SIGID, and thence to a SIGContext
int sigid = Integer.parseInt(str);
return user.getSIGContext(sigid);
} // end try
catch (NumberFormatException nfe)
{ // error in Integer.parseInt
logger.error("Cannot convert SIG parameter '" + str + "'!");
throw new ValidationException("Invalid SIG parameter.");
} // end catch
} // end getSIGParameter
private static ConferenceContext getConferenceParameter(ServletRequest request, SIGContext sig)
throws ValidationException, DataException, AccessError
{
String str = request.getParameter("conf");
if (str==null)
{ // no conference parameter - bail out now!
logger.error("Conference parameter not specified!");
throw new ValidationException("No conference specified.");
} // end if
try
{ // turn the string into a ConfID, and thence to a ConferenceContext
int confid = Integer.parseInt(str);
return sig.getConferenceContext(confid);
} // end try
catch (NumberFormatException nfe)
{ // error in Integer.parseInt
logger.error("Cannot convert conference parameter '" + str + "'!");
throw new ValidationException("Invalid conference parameter.");
} // end catch
} // end getConferenceParameter
private CreateConferenceDialog makeCreateConferenceDialog() throws ServletException
{
final String desired_name = "CreateConferenceDialog";
DialogCache cache = DialogCache.getDialogCache(getServletContext());
if (!(cache.isCached(desired_name)))
{ // create a template and save it off
CreateConferenceDialog template = new CreateConferenceDialog();
cache.saveTemplate(template);
} // end if
// return a new copy
return (CreateConferenceDialog)(cache.getNewDialog(desired_name));
} // end makeCreateConferenceDialog
private static boolean validateNewTopic(ServletRequest request) throws ValidationException
{
boolean is_title_null, is_zp_null;
String foo = request.getParameter("title");
if (foo==null)
throw new ValidationException("Title parameter was not specified.");
is_title_null = (foo.length()==0);
foo = request.getParameter("pseud");
if (foo==null)
throw new ValidationException("Pseud parameter was not specified.");
foo = request.getParameter("pb");
if (foo==null)
throw new ValidationException("Body text was not specified.");
is_zp_null = (foo.length()==0);
return is_title_null || is_zp_null;
} // end validateNewTopic
/*--------------------------------------------------------------------------------
* Overrides from class HttpServlet
*--------------------------------------------------------------------------------
*/
public String getServletInfo()
{
String rc = "ConfOperations servlet - General conference operations (list, create, etc.)\n"
+ "Part of the Venice Web Communities System\n";
return rc;
} // end getServletInfo
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
UserContext user = getUserContext(request);
RenderData rdat = createRenderData(request,response);
String page_title = null;
Object content = null;
SIGContext sig = null;
try
{ // all conference commands require a SIG parameter as well
sig = getSIGParameter(request,user);
changeMenuSIG(request,sig);
} // end try
catch (ValidationException ve)
{ // no SIG specified
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),"top");
} // end catch
catch (DataException de)
{ // error looking up the SIG
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error finding SIG: " + de.getMessage(),"top");
} // end catch
if (content==null)
{ // get the command we want to use
String cmd = request.getParameter("cmd");
if (cmd==null)
cmd = "???";
if (cmd.equals("C"))
{ // "C" = "Create conference"
if (sig.canCreateConference())
{ // make the create conference dialog!
CreateConferenceDialog dlg = makeCreateConferenceDialog();
dlg.setupDialog(getVeniceEngine(),sig);
content = dlg;
page_title = dlg.getTitle();
} // end if
else
{ // we can't create conferences
page_title = "Error";
content = new ErrorBox("SIG Error","You are not permitted to create conferences in this SIG.","top");
} // end else
} // end if
else if (cmd.equals("T"))
{ // "T" = "Create topic" (requires conference parameter)
try
{ // start by getting the conference parameter
ConferenceContext conf = getConferenceParameter(request,sig);
// create the New Topic form
NewTopicForm ntf = new NewTopicForm(sig,conf);
ntf.setupNewRequest();
content = ntf;
page_title = "Create New Topic";
} // end try
catch (ValidationException ve)
{ // we can't get the conference parameter
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),
"sigprofile?sig=" + String.valueOf(sig.getSIGID()));
} // end catch
catch (AccessError ae)
{ // we have some sort of access problem
page_title = "Access Error";
content = new ErrorBox(page_title,ae.getMessage(),
"sigprofile?sig=" + String.valueOf(sig.getSIGID()));
} // end catch
catch (DataException de)
{ // some sort of error in the database
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error finding conference: " + de.getMessage(),
"sigprofile?sig=" + String.valueOf(sig.getSIGID()));
} // end catch
} // end else
else
{ // any unrecognized command jumps us to "conference list"
try
{ // show the conference listing
content = new ConferenceListing(sig);
page_title = "Conference Listing: " + sig.getName();
} // end try
catch (DataException de)
{ // something wrong in the database
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error finding conferences: " + de.getMessage(),
"sigprofile?sig=" + String.valueOf(sig.getSIGID()));
} // end catch
catch (AccessError ae)
{ // some lack of access is causing problems
page_title = "Access Error";
content = new ErrorBox(page_title,ae.getMessage(),
"sigprofile?sig=" + String.valueOf(sig.getSIGID()));
} // end catch
} // end else
} // end if (SIG parameter retrieved OK)
BaseJSPData basedat = new BaseJSPData(page_title,"confops?" + request.getQueryString(),content);
basedat.transfer(getServletContext(),rdat);
} // end doGet
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
UserContext user = getUserContext(request);
RenderData rdat = createRenderData(request,response);
String page_title = null;
Object content = null;
SIGContext sig = null;
String location;
try
{ // all conference commands require a SIG parameter as well
sig = getSIGParameter(request,user);
changeMenuSIG(request,sig);
location = "confops?sig=" + String.valueOf(sig.getSIGID());
} // end try
catch (ValidationException ve)
{ // no SIG specified
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),"top");
location = "top";
} // end catch
catch (DataException de)
{ // error looking up the SIG
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error finding SIG: " + de.getMessage(),"top");
location = "top";
} // end catch
if (content==null)
{ // get the command we want to use
String cmd = request.getParameter("cmd");
if (cmd==null)
cmd = "???";
if (cmd.equals("C"))
{ // "C" = "Create Conference"
if (sig.canCreateConference())
{ // load up the create conference dialog!
CreateConferenceDialog dlg = makeCreateConferenceDialog();
dlg.setupDialog(getVeniceEngine(),sig);
if (dlg.isButtonClicked(request,"cancel"))
{ // they chickened out - go back to the conference list
rdat.redirectTo(location);
return;
} // end if
if (dlg.isButtonClicked(request,"create"))
{ // OK, they actually want to create the new conference...
dlg.loadValues(request); // load the form data
try
{ // attempt to create the conference!
ConferenceContext conf = dlg.doDialog(sig);
// success! go to the conference's topic list
rdat.redirectTo("confdisp?sig=" + String.valueOf(sig.getSIGID()) + "&conf="
+ String.valueOf(conf.getConfID()));
return;
} // end try
catch (ValidationException ve)
{ // validation error - throw it back to the user
dlg.resetOnError(ve.getMessage() + " Please try again.");
content = dlg;
page_title = dlg.getTitle();
} // end catch
catch (AccessError ae)
{ // some sort of access error - display an error dialog
page_title = "Access Error";
content = new ErrorBox(page_title,ae.getMessage(),location);
} // end catch
catch (DataException de)
{ // database error creating the conference
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error creating conference: " + de.getMessage(),
location);
} // end catch
} // end if
else
{ // error - don't know what button was clicked
page_title = "Internal Error";
logger.error("no known button click on ConfOperations.doPost, cmd=C");
content = new ErrorBox(page_title,"Unknown command button pressed",location);
} // end else
} // end if
else
{ // we can't create conferences
page_title = "Error";
content = new ErrorBox("SIG Error","You are not permitted to create conferences in this SIG.",
location);
} // end else
} // end if ("C" command)
else if (cmd.equals("T"))
{ // "T" command = Create New Topic (requires conference parameter)
ConferenceContext conf = null;
try
{ // start by getting the conference parameter
conf = getConferenceParameter(request,sig);
} // end try
catch (ValidationException ve)
{ // we can't get the conference parameter
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),location);
} // end catch
catch (AccessError ae)
{ // we have some sort of access problem
page_title = "Access Error";
content = new ErrorBox(page_title,ae.getMessage(),location);
} // end catch
catch (DataException de)
{ // some sort of error in the database
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error finding conference: " + de.getMessage(),location);
} // end catch
if (content==null)
{ // determine what to do based on the button pressed
String on_error = "confdisp?sig=" + String.valueOf(sig.getSIGID()) + "&conf="
+ String.valueOf(conf.getConfID());
if (isImageButtonClicked(request,"cancel"))
{ // the user chickened out - go back to the conference display
rdat.redirectTo(on_error);
return;
} // end if
if (isImageButtonClicked(request,"preview"))
{ // generate a preview and redisplay the form
NewTopicForm ntf = new NewTopicForm(sig,conf);
try
{ // do a preview generation
ntf.generatePreview(getVeniceEngine(),request);
if (ntf.isNullRequest())
{ // no title or text specified - this is a "204 No Content" return
rdat.nullResponse();
return;
} // end if
content = ntf;
page_title = "Preview New Topic";
} // end try
catch (ValidationException ve)
{ // something messed up in the preview generation
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),on_error);
} // end catch
} // end if ("preview" button clicked)
else if (isImageButtonClicked(request,"post"))
{ // OK, let's do a post request!
try
{ // first validate that we've got all the parameters
if (validateNewTopic(request))
{ // this is a null request - send a null response
rdat.nullResponse();
return;
} // end if
// add the new topic!
TopicContext topic = conf.addTopic(request.getParameter("title"),request.getParameter("pseud"),
request.getParameter("pb"));
final String yes = "Y";
if (yes.equals(request.getParameter("attach")))
{ // we need to upload an attachment for this post
TopicMessageContext msg = topic.getMessage(0); // load the "zero post"
content = new AttachmentForm(sig,conf,msg,on_error);
page_title = "Upload Attachment";
} // end if
else
{ // the post is complete, we need only jump to the topic
// TODO: jump straight to the new topic
rdat.redirectTo(on_error);
return;
} // end else
} // end try
catch (ValidationException ve)
{ // the validation of parameters failed
page_title = "Error";
content = new ErrorBox(null,ve.getMessage(),on_error);
} // end catch
catch (DataException de)
{ // display a database error
page_title = "Database Error";
content = new ErrorBox(page_title,"Database error adding topic: " + de.getMessage(),on_error);
} // end catch
catch (AccessError ae)
{ // some sort of access problem
page_title = "Access Error";
content = new ErrorBox(page_title,ae.getMessage(),on_error);
} // end catch
} // end else if
else
{ // we don't know what button was pressed
page_title = "Internal Error";
logger.error("no known button click on ConfOperations.doPost, cmd=T");
content = new ErrorBox(page_title,"Unknown command button pressed",on_error);
} // end else
} // end if (we got the conference parameter OK)
} // end else if ("T" command)
else
{ // unrecognized command!
page_title = "Internal Error";
logger.error("invalid command to ConfOperations.doPost: " + cmd);
content = new ErrorBox(page_title,"Invalid command to ConfOperations.doPost",location);
} // end else
} // end if (SIG parameter retrieved OK)
BaseJSPData basedat = new BaseJSPData(page_title,location,content);
basedat.transfer(getServletContext(),rdat);
} // end doPost
} // end class ConfOperations