/*

  * 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.krad.service.impl;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.kim.api.permission.Permission;

 import org.kuali.rice.kim.impl.permission.PermissionBo;

 import org.kuali.rice.kim.service.support.impl.KimPermissionTypeServiceBase;

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

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

 /**

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

  */

 public class ComponentFieldPermissionTypeServiceImpl extends KimPermissionTypeServiceBase {

         /**

          * Compare the component and property names between the request and matching permissions.

          * Make entries with a matching property name take precedence over those with blank property 

          * names on the stored permissions.  Only match entries with blank property names if

          * no entries match on the exact property name. 

          */

         @Override

         protected List<Permission> performPermissionMatches(Map<String, String> requestedDetails,

                         List<Permission> permissionsList) {

                 List<Permission> propertyMatches = new ArrayList<Permission>();

                 List<Permission> prefixPropertyMatches = new ArrayList<Permission>();

                 List<Permission> blankPropertyMatches = new ArrayList<Permission>();

                 String propertyName = requestedDetails.get(KimConstants.AttributeConstants.PROPERTY_NAME);

                 String componentName = requestedDetails.get(KimConstants.AttributeConstants.COMPONENT_NAME);

                 for ( Permission kpi : permissionsList ) {

             PermissionBo bo = PermissionBo.from(kpi);

                         if ( StringUtils.equals( componentName, bo.getDetails().get( KimConstants.AttributeConstants.COMPONENT_NAME ) ) ) {

                                 String permPropertyName = bo.getDetails().get(KimConstants.AttributeConstants.PROPERTY_NAME);

                                 if ( StringUtils.isBlank( permPropertyName ) ) {

                                         blankPropertyMatches.add( kpi );

                                 } else if ( StringUtils.equals( propertyName, permPropertyName ) ) {

                                         propertyMatches.add( kpi );

                                 } else if ( doesPropertyNameMatch(propertyName, permPropertyName) ) {

                                         prefixPropertyMatches.add( kpi );

                                 }

                         }

                 }

                 if ( !propertyMatches.isEmpty() ) {

                         return propertyMatches;

                 } else if ( !prefixPropertyMatches.isEmpty() ) {

                         return prefixPropertyMatches;

                 } else {

                         return blankPropertyMatches;

                 }

         }

 }