/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (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/ecl2.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.edl.impl.components;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.api.util.xml.XmlJotter;

 import org.kuali.rice.edl.impl.EDLContext;

 import org.kuali.rice.edl.impl.EDLModelComponent;

 import org.kuali.rice.edl.impl.EDLXmlUtils;

 import org.kuali.rice.edl.impl.RequestParser;

 import org.kuali.rice.edl.impl.UserAction;

 import org.kuali.rice.kew.api.WorkflowDocument;

 import org.kuali.rice.kew.api.WorkflowDocumentFactory;

 import org.kuali.rice.kew.api.WorkflowRuntimeException;

 import org.kuali.rice.kew.api.document.DocumentStatus;

 import org.kuali.rice.kew.api.exception.WorkflowException;

 import org.w3c.dom.Document;

 import org.w3c.dom.Element;

 /**

  * Used as a pre processor and post processor. As a pre processor this creates/fetches the workflow

  * document and sets it on request. As a post processor this takes appropriate user action on the

  * document if the document is not in error.

  * 

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

  * 

  */

 public class WorkflowDocumentActions implements EDLModelComponent {

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

     public static final String ACTION_TAKEN = "actionTaken";

     boolean isPreProcessor;

     public void updateDOM(Document dom, Element configElement, EDLContext edlContext) {

         try {

             isPreProcessor = configElement.getTagName().equals("preProcessor");

             if (isPreProcessor) {

                 doPreProcessWork(edlContext);

             } else {

                 doPostProcessWork(dom, edlContext);

             }

         } catch (Exception e) {

             throw new WorkflowRuntimeException(e);

         }

     }

     private void doPreProcessWork(EDLContext edlContext) throws Exception {

         RequestParser requestParser = edlContext.getRequestParser();

         UserAction userAction = edlContext.getUserAction();

         WorkflowDocument document = null;

         if (UserAction.ACTION_CREATE.equals(userAction.getAction())) {

             document = WorkflowDocumentFactory.createDocument(edlContext.getUserSession().getPrincipalId(), edlContext

                     .getEdocLiteAssociation().getEdlName());

             document.setTitle("Routing Document Type '" + document.getDocumentTypeName() + "'");

             document.getDocumentId();

             LOG.info("Created document " + document.getDocumentId());

         } else {

             document = (WorkflowDocument) requestParser.getAttribute(RequestParser.WORKFLOW_DOCUMENT_SESSION_KEY);

             if (document == null) {

                 String docId = (String) requestParser.getAttribute("docId");

                 if (docId == null) {

                     LOG.info("no document found for edl " + edlContext.getEdocLiteAssociation().getEdlName());

                     return;

                 } else {

                     document = WorkflowDocumentFactory

                             .loadDocument(edlContext.getUserSession().getPrincipalId(), docId);

                 }

             }

         }

         requestParser.setAttribute(RequestParser.WORKFLOW_DOCUMENT_SESSION_KEY, document);

     }

     private void doPostProcessWork(Document dom, EDLContext edlContext) throws Exception {

         RequestParser requestParser = edlContext.getRequestParser();

         // if the document is in error then we don't want to execute the action!

         if (edlContext.isInError()) {

             return;

         }

         WorkflowDocument document = (WorkflowDocument) edlContext.getRequestParser().getAttribute(

                 RequestParser.WORKFLOW_DOCUMENT_SESSION_KEY);

         if (document == null) {

             return;

         }

         //strip out the data element

         Element dataElement = (Element) dom.getElementsByTagName(EDLXmlUtils.DATA_E).item(0);

         String docContent = XmlJotter.jotNode(dataElement);//use the transformer on edlcontext

         document.setApplicationContent(docContent);

         takeAction(document, dom, edlContext);

     }

     public static void takeAction(WorkflowDocument document, Document dom, EDLContext edlContext)

             throws WorkflowException {

         RequestParser requestParser = edlContext.getRequestParser();

         UserAction userAction = edlContext.getUserAction();

         String annotation = requestParser.getParameterValue("annotation");

         String action = userAction.getAction();

         String previousNodeName = requestParser.getParameterValue("previousNode");

         if (!userAction.isValidatableAction()) {

             // if the action's not validatable, clear the attribute definitions because we don't want to end up executing validateClientRoutingData()

             // TODO the problem here is that the XML is still updated on a cancel so we end up without any attribute content in the document content

             document.clearAttributeDefinitions();

         }

         boolean actionTaken = true;

         if (UserAction.ACTION_ROUTE.equals(action)) {

             document.route(annotation);

         } else if (UserAction.ACTION_APPROVE.equals(action)) {

             document.approve(annotation);

         } else if (UserAction.ACTION_DISAPPROVE.equals(action)) {

             document.disapprove(annotation);

         } else if (UserAction.ACTION_CANCEL.equals(action)) {

             document.cancel(annotation);

         } else if (UserAction.ACTION_BLANKETAPPROVE.equals(action)) {

             document.blanketApprove(annotation);

         } else if (UserAction.ACTION_FYI.equals(action)) {

             document.fyi();

         } else if (UserAction.ACTION_ACKNOWLEDGE.equals(action)) {

             document.acknowledge(annotation);

         } else if (UserAction.ACTION_SAVE.equals(action)) {

             if (document.getStatus().equals(DocumentStatus.INITIATED)) {

                 document.saveDocument(annotation);

             } else {

                 document.saveDocumentData();

             }

         } else if (UserAction.ACTION_COMPLETE.equals(action)) {

             document.complete(annotation);

         } else if (UserAction.ACTION_DELETE.equals(action)) {

             document.delete();

         } else if (UserAction.ACTION_RETURN_TO_PREVIOUS.equals(action)) {

             document.returnToPreviousNode(annotation, previousNodeName);

         } else {

             actionTaken = false;

         }

         if (actionTaken) {

             Element actionTakenElement = EDLXmlUtils.getOrCreateChildElement(dom.getDocumentElement(), ACTION_TAKEN,

                     true);

             actionTakenElement.appendChild(dom.createTextNode(action));

         }

     }

 }