/*

  * Copyright 2005-2007 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.notification.service.impl;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.HashSet;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Set;

 import org.apache.commons.collections.ComparatorUtils;

 import org.kuali.rice.kew.actionitem.ActionItem;

 import org.kuali.rice.kew.actionitem.ActionItemComparator;

 import org.kuali.rice.kew.doctype.bo.DocumentType;

 import org.kuali.rice.kew.engine.RouteContext;

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

 import org.kuali.rice.kew.mail.service.ActionListImmediateEmailReminderService;

 import org.kuali.rice.kew.messaging.MessageServiceNames;

 import org.kuali.rice.kew.notification.service.NotificationService;

 import org.kuali.rice.kew.preferences.Preferences;

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

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

 import org.kuali.rice.kew.util.KEWConstants;

 /**

  * The default implementation of the NotificationService.

  *

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

  */

 public class DefaultNotificationService implements NotificationService {

         protected final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(getClass());

         private static final Comparator notificationPriorityComparator = ComparatorUtils.reversedComparator(new ActionItemComparator());

         /**

          * Queues up immediate email processors for ActionItem notification.  Prioritizes the list of

          * Action Items passed in and attempts to not send out multiple emails to the same user.

          */

         public void notify(List<ActionItem> actionItems) {

                 // sort the list of action items using the same comparator as the Action List

                 Collections.sort(actionItems, notificationPriorityComparator);

                 Set sentNotifications = new HashSet();

                 for (Iterator iterator = actionItems.iterator(); iterator.hasNext();) {

                         ActionItem actionItem = (ActionItem) iterator.next();

                         if (!sentNotifications.contains(actionItem.getPrincipalId()) && shouldNotify(actionItem)) {

                                 sentNotifications.add(actionItem.getPrincipalId());

                                 sendNotification(actionItem);

                         }

                 }

         }

         /**

          * Sends a notification

          * @param actionItem the action item

          */

         protected void sendNotification(ActionItem actionItem) {

         ActionListImmediateEmailReminderService immediateEmailService = MessageServiceNames.getImmediateEmailService();

         immediateEmailService.sendReminder(actionItem, RouteContext.getCurrentRouteContext().isDoNotSendApproveNotificationEmails());

         }

         protected boolean shouldNotify(ActionItem actionItem) {

                 try {

                         Preferences preferences = KEWServiceLocator.getPreferencesService().getPreferences(actionItem.getPrincipalId());

                         boolean sendEmail = false;

                         if (KEWConstants.EMAIL_RMNDR_IMMEDIATE.equals(preferences.getEmailNotification())) {

                                 if (KEWConstants.DELEGATION_PRIMARY.equals(actionItem.getDelegationType())) {

                                         sendEmail = KEWConstants.PREFERENCES_YES_VAL.equals(preferences.getNotifyPrimaryDelegation());

                                 } else if (KEWConstants.DELEGATION_SECONDARY.equals(actionItem.getDelegationType())) {

                                         sendEmail = KEWConstants.PREFERENCES_YES_VAL.equals(preferences.getNotifySecondaryDelegation());

                                 } else {

                                         sendEmail = true;

                                 }

                         }

                         // don't send notification if this action item came from a SAVE action and the NOTIFY_ON_SAVE policy is not set

                         if (sendEmail && isItemOriginatingFromSave(actionItem) && !shouldNotifyOnSave(actionItem)) {

                                 sendEmail = false;

                         }

                         return sendEmail;

                 } catch (Exception e) {

                         throw new WorkflowRuntimeException("Error loading user with workflow id " + actionItem.getPrincipalId() + " for notification.", e);

                 }

         }

         /**

          * Returns true if the ActionItem doesn't represent a request generated from a "SAVE" action or, if it does,

          * returns true if the document type policy

          */

         protected boolean isItemOriginatingFromSave(ActionItem actionItem) {

                 return actionItem.getResponsibilityId() != null && actionItem.getResponsibilityId().equals(KEWConstants.SAVED_REQUEST_RESPONSIBILITY_ID);

         }

         protected boolean shouldNotifyOnSave(ActionItem actionItem) {

                 DocumentRouteHeaderValue document = KEWServiceLocator.getRouteHeaderService().getRouteHeader(actionItem.getDocumentId());

                 DocumentType documentType = KEWServiceLocator.getDocumentTypeService().findById(document.getDocumentTypeId());

                 return documentType.getNotifyOnSavePolicy().getPolicyValue().booleanValue();

         }

     public void removeNotification(List<ActionItem> actionItems) {

         // nothing

     }

 }