/*

  * Copyright 2007-2008 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.ken.service.impl;

 import java.util.Collection;

 import java.util.HashMap;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.dao.GenericDao;

 import org.kuali.rice.ken.bo.UserChannelSubscription;

 import org.kuali.rice.ken.service.NotificationChannelService;

 import org.kuali.rice.ken.service.UserPreferenceService;

 import org.kuali.rice.ken.util.NotificationConstants;

 /**

  * UserPreferenceService implementation - uses the businessObjectDao to get at data in the underlying database.

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

  */

 public class UserPreferenceServiceImpl implements UserPreferenceService {

     private GenericDao businessObjectDao;

     private NotificationChannelService notificationChannelService;

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

     /**

      * Constructs a UserPreferenceServiceImpl 

      * @param businessObjectDao

      * @param notificationChannelService

      */

     public UserPreferenceServiceImpl(GenericDao businessObjectDao, NotificationChannelService notificationChannelService) {

         this.businessObjectDao = businessObjectDao;

         this.notificationChannelService = notificationChannelService;

     }

     /**

      * @see org.kuali.rice.ken.service.UserPreferenceService#getCurrentSubscriptions(java.lang.String)

      */

     public Collection<UserChannelSubscription> getCurrentSubscriptions(String userid) {

         UserChannelSubscription userChannelSubscription = new UserChannelSubscription();

         userChannelSubscription.setUserId(userid);

         return businessObjectDao.findMatchingByExample(userChannelSubscription);

     }

     /**

      * @see org.kuali.rice.ken.service.UserPreferenceService#getSubscription(java.lang.String, java.lang.String)

      */

     public UserChannelSubscription getSubscription(String channelid, String userid) {

         HashMap<String, String> uniqueKeys = new HashMap<String,String>();

         uniqueKeys.put(NotificationConstants.BO_PROPERTY_NAMES.CHANNEL_ID, channelid);

         uniqueKeys.put(NotificationConstants.BO_PROPERTY_NAMES.USER_ID, userid);

         UserChannelSubscription subscription = (UserChannelSubscription) businessObjectDao.findByUniqueKey(UserChannelSubscription.class, uniqueKeys);

         return subscription; 

     }

     /**

      * @see org.kuali.rice.ken.service.UserPreferenceService#subscribeToChannel(org.kuali.rice.ken.bo.UserChannelSubscription)

      */

     public void subscribeToChannel(UserChannelSubscription userChannelSubscription) {

         LOG.info("Saving channel subscription");

         try {

             businessObjectDao.save(userChannelSubscription);

         } catch(Exception e) {

             LOG.error("Exception when saving userChannelSubscription");                    

         }

         LOG.debug("Channel subscription saved");

     }

     /**

      * @see org.kuali.rice.ken.service.UserPreferenceService#unsubscribeFromChannel(org.kuali.rice.ken.bo.UserChannelSubscription)

      */

     public void unsubscribeFromChannel(UserChannelSubscription userChannelSubscription) {

         LOG.info("unsubscribing from channel"); 

         try {

             businessObjectDao.delete(userChannelSubscription);

         } catch(Exception e) {

             LOG.error("Exception when deleting userChannelSubscription");                    

         }

     }

 }