/**

  * 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.kew.actions;

 import org.apache.log4j.MDC;

 import org.kuali.rice.kew.actionrequest.ActionRequestValue;

 import org.kuali.rice.kew.actionrequest.Recipient;

 import org.kuali.rice.kew.actiontaken.ActionTakenValue;

 import org.kuali.rice.kew.doctype.DocumentTypePolicy;

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

 import org.kuali.rice.kew.routeheader.DocumentRouteHeaderValue;

 import org.kuali.rice.kew.service.KEWServiceLocator;

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

 import org.kuali.rice.kim.api.identity.principal.PrincipalContract;

 import java.util.Iterator;

 import java.util.List;

 /**

  * The ApproveAction records and processes an approve action.

  *

  * The routeheader is first checked to make sure the action is valid for the document.

  * Next the user is checked to make sure he/she has not taken a previous action on this

  * document at the actions responsibility or below. The action is recorded.

  * Any requests related to this user are deactivated.

  *

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

  */

 public class ApproveAction extends ActionTakenEvent {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(ApproveAction.class);

     /**

      * @param routeHeader

      *            RouteHeader for the document upon which the action is taken.

      * @param principal

      *            User taking the action.

      */

     public ApproveAction(DocumentRouteHeaderValue routeHeader, PrincipalContract principal) {

         super(KewApiConstants.ACTION_TAKEN_APPROVED_CD, routeHeader, principal);

     }

     /**

      * @param routeHeader

      *            RouteHeader for the document upon which the action is taken.

      * @param principal

      *            User taking the action.

      * @param annotation

      *            User comment on the action taken

      */

     public ApproveAction(DocumentRouteHeaderValue routeHeader, PrincipalContract principal, String annotation) {

         super(KewApiConstants.ACTION_TAKEN_APPROVED_CD, routeHeader, principal, annotation);

     }

     /* (non-Javadoc)

      * @see org.kuali.rice.kew.actions.ActionTakenEvent#isActionCompatibleRequest(java.util.List)

      */

     @Override

     public String validateActionRules() {

         return validateActionRules(getActionRequestService().findAllPendingRequests(routeHeader.getDocumentId()));

     }

     public String validateActionRules(List<ActionRequestValue> actionRequests) {

         if (!getRouteHeader().isValidActionToTake(getActionPerformedCode())) {

             return "Document is not in a state to be approved";

         }

         List<ActionRequestValue> filteredActionRequests = filterActionRequestsByCode(actionRequests, KewApiConstants.ACTION_REQUEST_APPROVE_REQ);

         if (!isActionCompatibleRequest(filteredActionRequests)) {

             return "No request for the user is compatible " + "with the APPROVE action";

         }

         return "";

     }

     /* (non-Javadoc)

      * @see org.kuali.rice.kew.actions.ActionTakenEvent#isActionCompatibleRequest(java.util.List)

      */

     @Override

     public boolean isActionCompatibleRequest(List<ActionRequestValue> requests) {

         // we allow pre-approval

         if (requests.isEmpty()) {

             return true;

         }

         // can always cancel saved or initiated document

         if (routeHeader.isStateInitiated() || routeHeader.isStateSaved()) {

             return true;

         }

         boolean actionCompatible = false;

         Iterator ars = requests.iterator();

         ActionRequestValue actionRequest = null;

         while (ars.hasNext()) {

             actionRequest = (ActionRequestValue) ars.next();

             String request = actionRequest.getActionRequested();

             // Approve action matches Complete, Approve, FYI, and ACK requests

             if ( (KewApiConstants.ACTION_REQUEST_FYI_REQ.equals(request)) ||

                     (KewApiConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ.equals(request)) ||

                     (KewApiConstants.ACTION_REQUEST_APPROVE_REQ.equals(request)) ||

                     (KewApiConstants.ACTION_REQUEST_COMPLETE_REQ.equals(request)) ) {

                 actionCompatible = true;

                 break;

             }

         }

         return actionCompatible;

     }

     /**

      * Records the approve action.

      * - Checks to make sure the document status allows the action.

      * - Checks that the user has not taken a previous action.

      * - Deactivates the pending requests for this user

      * - Records the action

      *

      * @throws InvalidActionTakenException

      * @throws org.kuali.rice.kew.api.exception.ResourceUnavailableException

      */

     public void recordAction() throws InvalidActionTakenException {

         MDC.put("docId", getRouteHeader().getDocumentId());

         updateSearchableAttributesIfPossible();

         LOG.debug("Approving document : " + annotation);

         List actionRequests = getActionRequestService().findAllValidRequests(getPrincipal().getPrincipalId(), getDocumentId(), KewApiConstants.ACTION_REQUEST_APPROVE_REQ);

         if (actionRequests == null || actionRequests.isEmpty()) {

             DocumentTypePolicy allowUnrequested = getRouteHeader().getDocumentType().getAllowUnrequestedActionPolicy();

             if (allowUnrequested != null) {

                     if (!allowUnrequested.getPolicyValue()) {

                             throw new InvalidActionTakenException("No request for the user is compatible " + "with the APPROVE action. " + "Doctype policy ALLOW_UNREQUESTED_ACTION is set to false and someone else likely just took action on the document.");

                     }

             }

         }

         String errorMessage = validateActionRules(actionRequests);

         if (!org.apache.commons.lang.StringUtils.isEmpty(errorMessage)) {

             throw new InvalidActionTakenException(errorMessage);

         }

         Recipient delegator = findDelegatorForActionRequests(actionRequests);

         LOG.debug("Record the approve action");

         ActionTakenValue actionTaken = saveActionTaken(delegator);

         LOG.debug("Deactivate all pending action requests");

         getActionRequestService().deactivateRequests(actionTaken, actionRequests);

         notifyActionTaken(actionTaken);

         boolean isException = getRouteHeader().isInException();

         boolean isSaved = getRouteHeader().isStateSaved();

         if (isException || isSaved) {

             String oldStatus = getRouteHeader().getDocRouteStatus();

             LOG.debug("Moving document back to Enroute from "+KewApiConstants.DOCUMENT_STATUSES.get(oldStatus));

             getRouteHeader().markDocumentEnroute();

             String newStatus = getRouteHeader().getDocRouteStatus();

             notifyStatusChange(newStatus, oldStatus);

             KEWServiceLocator.getRouteHeaderService().saveRouteHeader(getRouteHeader());

         }

     }

 }