/*

  * Copyright 2007-2009 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.kns.service.impl;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.namespace.Namespace;

 import org.kuali.rice.core.api.services.CoreApiServiceLocator;

 import org.kuali.rice.core.util.AttributeSet;

 import org.kuali.rice.kim.api.type.KimType;

 import org.kuali.rice.kim.bo.role.dto.KimPermissionInfo;

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

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 /**

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

  */

 public class NamespaceWildcardAllowedAndOrStringExactMatchPermissionTypeServiceImpl

                 extends NamespacePermissionTypeServiceImpl {

         protected static final String NAMESPACE_CODE = KimConstants.UniqueKeyConstants.NAMESPACE_CODE;

         protected String exactMatchStringAttributeName;

         protected boolean namespaceRequiredOnStoredAttributeSet;

         @Override

         protected List<KimPermissionInfo> performPermissionMatches(AttributeSet requestedDetails, List<KimPermissionInfo> permissionsList) {

             List<KimPermissionInfo> matchingPermissions = new ArrayList<KimPermissionInfo>();

         List<KimPermissionInfo> matchingBlankPermissions = new ArrayList<KimPermissionInfo>();

             String requestedAttributeValue = requestedDetails.get(exactMatchStringAttributeName);

             for ( KimPermissionInfo kpi : permissionsList ) {

                 String permissionAttributeValue = kpi.getDetails().get(exactMatchStringAttributeName);

                 if ( StringUtils.equals(requestedAttributeValue, permissionAttributeValue) ) {

                     matchingPermissions.add(kpi);

                 } else if ( StringUtils.isBlank(permissionAttributeValue) ) {

                     matchingBlankPermissions.add(kpi);

                 }

             }

             // if the exact match worked, use those when checking the namespace

             // otherwise, use those with a blank additional property value

             if ( !matchingPermissions.isEmpty() ) {

             List<KimPermissionInfo> matchingWithNamespace = super.performPermissionMatches(requestedDetails, matchingPermissions);

                 if ( !namespaceRequiredOnStoredAttributeSet ) {

                     // if the namespace is not required and the namespace match would have excluded

                     // the results, return the original set of matches

                     if ( matchingWithNamespace.isEmpty() ) {

                         return matchingPermissions;

                     }

                 }

             return matchingWithNamespace;

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

             List<KimPermissionInfo> matchingWithNamespace = super.performPermissionMatches(requestedDetails, matchingBlankPermissions);

             if ( !namespaceRequiredOnStoredAttributeSet ) {

                 // if the namespace is not required and the namespace match would have excluded

                 // the results, return the original set of matches

                 if ( matchingWithNamespace.isEmpty() ) {

                     return matchingBlankPermissions;

                 }

             }

             return matchingWithNamespace;

             }

             return matchingPermissions; // will be empty if drops to here

         }

         public void setExactMatchStringAttributeName(

                         String exactMatchStringAttributeName) {

                 this.exactMatchStringAttributeName = exactMatchStringAttributeName;

                 requiredAttributes.add(exactMatchStringAttributeName);

         }

         public void setNamespaceRequiredOnStoredAttributeSet(

                         boolean namespaceRequiredOnStoredAttributeSet) {

                 this.namespaceRequiredOnStoredAttributeSet = namespaceRequiredOnStoredAttributeSet;

         }

         /**

          * Overrides the superclass's version of this method in order to account for "namespaceCode" permission detail values containing wildcards.

          */

         @Override

         protected Map<String, List<String>> validateReferencesExistAndActive(KimType kimType, AttributeSet attributes, Map<String, String> previousValidationErrors) {

                 Map<String,List<String>> errors = new HashMap<String,List<String>>();

                 AttributeSet nonNamespaceCodeAttributes = new AttributeSet(attributes);

                 // Check if "namespaceCode" is one of the permission detail values.

                 if (attributes.containsKey(NAMESPACE_CODE)) {

                         nonNamespaceCodeAttributes.remove(NAMESPACE_CODE);

             final Namespace namespace = CoreApiServiceLocator.getNamespaceService().getNamespace(attributes.get(NAMESPACE_CODE));

                         if (namespace != null) {

                             errors.putAll(super.validateReferencesExistAndActive(kimType, new AttributeSet(NAMESPACE_CODE, namespace.getCode()), previousValidationErrors));

                         } else {

                                 // If no namespaces were found, let the superclass generate an appropriate error.

                                 errors.putAll(super.validateReferencesExistAndActive(kimType, new AttributeSet(NAMESPACE_CODE, attributes.get(NAMESPACE_CODE)), previousValidationErrors));

                         }

                 }

                 // Validate all non-namespaceCode attributes.

                 errors.putAll(super.validateReferencesExistAndActive(kimType, nonNamespaceCodeAttributes, previousValidationErrors));

                 return errors;

         }

 }