/*

  * Copyright 2011 The Kuali 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 org.kuali.rice.krad.web.spring;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.log4j.Logger;

 import org.kuali.rice.krad.UserSession;

 import org.kuali.rice.krad.service.KRADServiceLocatorWeb;

 import org.kuali.rice.krad.service.SessionDocumentService;

 import org.kuali.rice.krad.uif.history.History;

 import org.kuali.rice.krad.uif.history.HistoryEntry;

 import org.kuali.rice.krad.uif.service.ViewService;

 import org.kuali.rice.krad.uif.util.UifWebUtils;

 import org.kuali.rice.krad.util.KRADConstants;

 import org.kuali.rice.krad.util.WebUtils;

 import org.kuali.rice.krad.web.spring.form.DocumentFormBase;

 import org.kuali.rice.krad.web.spring.form.IncidentReportForm;

 import org.kuali.rice.krad.web.spring.form.UifFormBase;

 import org.springframework.web.servlet.ModelAndView;

 /**

  * Spring Exception intercepter

  *

  * <p>

  * Gets the data needed for the incident report from the request and builds the

  * model and view for the incident report. This resolver intercepts any unhandled 

  * exception.

  * </p>

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class UifHandlerExceptionResolver implements org.springframework.web.servlet.HandlerExceptionResolver {

     private static final Logger LOG = Logger.getLogger(UifHandlerExceptionResolver.class);

     /**

      * Builds the incident report model and view from the

      * request that threw the exception.

      * 

      * @param request

      *            the request

      * @param response

      *            the response

      * @param handler

      *            the current handler when the exception occurred

      * @param ex

      *            the exception

      * @return the incident report model and view

      * @see org.springframework.web.servlet.HandlerExceptionResolver#resolveException(javax.servlet.http.HttpServletRequest,

      *      javax.servlet.http.HttpServletResponse, java.lang.Object,

      *      java.lang.Exception)

      */

     @Override

     public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler,

             Exception ex) {    

         LOG.error("The following error was caught by the UifHandlerExceptionResolver : ", ex);        

         String incidentDocId = request.getParameter(KRADConstants.DOCUMENT_DOCUMENT_NUMBER);

         String incidentViewId = "";

         // log exception

         LOG.error(ex.getMessage(), ex);

         UifFormBase form = UifWebUtils.getFormFromRequest(request);

         if (form instanceof DocumentFormBase) {

             incidentDocId = ((DocumentFormBase) form).getDocument().getDocumentNumber();

             incidentViewId = ((DocumentFormBase) form).getViewId();

         }

         UserSession userSession = (UserSession) request.getSession().getAttribute(KRADConstants.USER_SESSION_KEY);

         IncidentReportForm incidentReportForm = new IncidentReportForm();

         // Set the post url map to the incident report controller and not 

         // the one the exception occurred on

         String postUrl = request.getRequestURL().toString();        

         postUrl = postUrl.substring(0, postUrl.lastIndexOf("/")) + "/incidentReport";

         incidentReportForm.setFormPostUrl(postUrl);

         incidentReportForm.setException(ex);

         incidentReportForm.setIncidentDocId(incidentDocId);

         incidentReportForm.setIncidentViewId(incidentViewId);

         incidentReportForm.setController(handler.getClass().toString());

         incidentReportForm.setUserId(userSession.getPrincipalId());

         incidentReportForm.setUserName(userSession.getPrincipalName());

         incidentReportForm.setUserEmail(userSession.getPerson().getEmailAddress());

         incidentReportForm.setDevMode(!WebUtils.isProductionEnvironment());

         // Set the view object

         incidentReportForm.setView(getViewService().getView("Incident-Report",

                 incidentReportForm.getViewRequestParameters()));

         // Add a new History entry to avoid errors in the postHandle

         History history = new History();

         HistoryEntry entry = new HistoryEntry("", "", "Incident Report", "", "");

         history.setCurrent(entry);

         incidentReportForm.setFormHistory(history);

         // Set render full view to force full render

         incidentReportForm.setRenderFullView(true);

         ModelAndView modelAndView = UifWebUtils.getUIFModelAndView(incidentReportForm, "Incident-Report", "");

         try {

             UifWebUtils.postControllerHandle(request, response, handler, modelAndView);

         } catch (Exception e) {

             LOG.error("An error stopped the incident form from loading", e);

         }

         return modelAndView;

     }

     protected ViewService getViewService() {

         return KRADServiceLocatorWeb.getViewService();

     }

     protected SessionDocumentService getSessionDocumentService() {

         return KRADServiceLocatorWeb.getSessionDocumentService();

     }

 }