/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/rwiki/trunk/rwiki-tool/tool/src/java/uk/ac/cam/caret/sakai/rwiki/tool/command/RevertCommand.java $
* $Id: RevertCommand.java 21065 2007-02-07 00:15:30Z ian@caret.cam.ac.uk $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006 The Sakai Foundation.
*
* Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**********************************************************************************/
package uk.ac.cam.caret.sakai.rwiki.tool.command;
import java.io.IOException;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.sakaiproject.component.api.ComponentManager;
import org.sakaiproject.tool.cover.SessionManager;
import uk.ac.cam.caret.sakai.rwiki.service.api.RWikiObjectService;
import uk.ac.cam.caret.sakai.rwiki.service.exception.PermissionException;
import uk.ac.cam.caret.sakai.rwiki.service.exception.VersionException;
import uk.ac.cam.caret.sakai.rwiki.tool.RWikiServlet;
import uk.ac.cam.caret.sakai.rwiki.tool.RequestScopeSuperBean;
import uk.ac.cam.caret.sakai.rwiki.tool.api.HttpCommand;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.EditBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.ErrorBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.HistoryBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.ResourceLoaderBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.ViewBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.helper.ResourceLoaderHelperBean;
import uk.ac.cam.caret.sakai.rwiki.tool.bean.helper.ViewParamsHelperBean;
import uk.ac.cam.caret.sakai.rwiki.tool.command.helper.ErrorBeanHelper;
/**
* @author andrew
*/
public class RevertCommand implements HttpCommand
{
private static Log log = LogFactory.getLog(RevertCommand.class);
private String successfulPath;
private RWikiObjectService objectService;
private String noUpdatePath;
private String contentChangedPath;
public void init()
{
ComponentManager cm = org.sakaiproject.component.cover.ComponentManager
.getInstance();
objectService = (RWikiObjectService) load(cm, RWikiObjectService.class
.getName());
}
private Object load(ComponentManager cm, String name)
{
Object o = cm.get(name);
if (o == null)
{
log.error("Cant find Spring component named " + name);
}
return o;
}
public void execute(Dispatcher dispatcher, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
RequestScopeSuperBean rssb = RequestScopeSuperBean
.getFromRequest(request);
ViewParamsHelperBean vphb = rssb.getNameHelperBean();
String revision = request.getParameter(HistoryBean.REVISION_PARAM);
String version = request.getParameter(HistoryBean.VERSION_PARAM);
// interpret version as Date and revision as int
Date versionDate = new Date(Long.parseLong(version));
int revisionInt = Integer.parseInt(revision);
String name = vphb.getGlobalName();
String realm = vphb.getLocalSpace();
try
{
objectService.revert(name, realm, versionDate, revisionInt);
// objectService.update(name, user, realm, versionDate, content);
}
catch (VersionException e)
{
// treat like a save that hasn't completed properly.
EditBean editBean = rssb.getEditBean();
editBean.setPreviousRevision(revisionInt);
editBean.setPreviousVersion(version);
editBean.setSaveType("revert");
this.contentChangedDispatch(dispatcher,request, response);
return;
}
catch (PermissionException e)
{
// Fail to revert!
this.noUpdateAllowed(dispatcher,request, response);
return;
}
// Successful reversion
this.successfulUpdateDispatch(dispatcher,request, response);
// set the state to view
ViewBean vb = new ViewBean(name, realm);
String requestURL = request.getRequestURL().toString();
SessionManager.getCurrentToolSession().setAttribute(
RWikiServlet.SAVED_REQUEST_URL, requestURL + vb.getViewUrl());
return;
}
private void successfulUpdateDispatch(Dispatcher dispatcher,HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
dispatcher.dispatch(successfulPath,request, response);
}
private void contentChangedDispatch(Dispatcher dispatcher,HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
ErrorBean errorBean = ErrorBeanHelper.getErrorBean(request);
ResourceLoaderBean rlb = ResourceLoaderHelperBean.getResourceLoaderBean();
errorBean
.addError(rlb.getString("revertcmd.content_changed","Content has changed since you last viewed it. Please update the new content or overwrite it with the submitted content."));
dispatcher.dispatch(contentChangedPath,request, response);
}
private void noUpdateAllowed(Dispatcher dispatcher,HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
ErrorBean errorBean = ErrorBeanHelper.getErrorBean(request);
ResourceLoaderBean rlb = ResourceLoaderHelperBean.getResourceLoaderBean();
errorBean.addError(rlb.getString("revertcmd.noupdate_allowed","You do not have permission to update this page."));
dispatcher.dispatch(noUpdatePath,request, response);
}
public String getContentChangedPath()
{
return contentChangedPath;
}
public void setContentChangedPath(String contentChangedPath)
{
this.contentChangedPath = contentChangedPath;
}
public String getNoUpdatePath()
{
return noUpdatePath;
}
public void setNoUpdatePath(String noUpdatePath)
{
this.noUpdatePath = noUpdatePath;
}
public String getSuccessfulPath()
{
return successfulPath;
}
public void setSuccessfulPath(String successfulPath)
{
this.successfulPath = successfulPath;
}
}