/*

  * Copyright 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 org.apache.log4j.Level;

 import org.apache.log4j.Logger;

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

 import org.kuali.rice.kim.api.group.Group;

 import org.kuali.rice.kim.api.group.GroupService;

 import org.kuali.rice.kim.api.services.KimApiServiceLocator;

 import org.kuali.rice.kim.util.KimConstants.KimGroupMemberTypes;

 import java.util.List;

 /**

  * NotificationRecipientService implementation

  * This implementation relies on KIM user and group management

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

  */

 public class NotificationRecipientServiceKimImpl implements NotificationRecipientService

 {

     private static final Logger LOG =

         Logger.getLogger(NotificationRecipientServiceKimImpl.class);

     protected GroupService getGroupService()

     {

         return KimApiServiceLocator.getGroupService();

     }

     /**

      * Uses the IdentityManagementService of KIM to get the members of a group.

      *

      * @param groupRecipientId the String name of the recipient group

      * @return a String array of all direct (child) principals and descendent principals

      * @see org.kuali.rice.ken.service.NotificationRecipientService#getGroupMembers(java.lang.String)

      */

     public String[] getGroupMembers(String groupRecipientId)

     {

         Group group = getGroupService().getGroup(groupRecipientId);

         List<String> ids = getGroupService().getMemberPrincipalIds(group.getId());

         String[] array = new String[ids.size()];

         return ids.toArray(array);

     }

     /**

      * This method retrieves the display name for a user.

      * @param userId

      * @return String

      */

     public String getUserDisplayName(String userId)

     {

         //Gary's handling user conversion

         return null;

     }

     /**

      *

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

      */

      public boolean isRecipientValid(String recipientId, String recipientType)

      {

          boolean b = false;

          if( recipientType.equals(KimGroupMemberTypes.GROUP_MEMBER_TYPE))

          {

              b = isGroupRecipientValid( recipientId );

          }

          else if( recipientType.equals(KimGroupMemberTypes.PRINCIPAL_MEMBER_TYPE) )

          {

              b = isUserRecipientValid( recipientId );

          }

          else

          {

              if( LOG.isEnabledFor(Level.ERROR) )

              {

                  LOG.error("Recipient Type is neither of two acceptable values");

              }

          }

          return b;

      }

     /**

      * This overridden method ...

      *

      * @see org.kuali.rice.ken.service.NotificationRecipientService#isGroupRecipientValid(java.lang.String)

      */

     public boolean isGroupRecipientValid(String groupRecipientId)

     {

         return (KimApiServiceLocator.getGroupService().getGroup( groupRecipientId ) != null);

     }

     /**

      * This overridden method ...

      *

      * @see org.kuali.rice.ken.service.NotificationRecipientService#isUserRecipientValid(java.lang.String)

      */

     public boolean isUserRecipientValid(String principalName)

     {

         return (KimApiServiceLocator.getIdentityService()

                 .getPrincipalByPrincipalName(principalName) != null);

     }

 }