/*

  * 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.kns.lookup;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import org.apache.commons.lang.StringUtils;

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

 import org.kuali.rice.kim.api.entity.principal.Principal;

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

 import org.kuali.rice.kns.bo.BusinessObject;

 import org.kuali.rice.kim.bo.Person;

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

 import org.kuali.rice.kns.document.authorization.PessimisticLock;

 import org.kuali.rice.kns.service.KNSServiceLocatorWeb;

 import org.kuali.rice.kns.service.PessimisticLockService;

 import org.kuali.rice.kns.util.BeanPropertyComparator;

 import org.kuali.rice.kns.util.FieldUtils;

 import org.kuali.rice.kns.util.GlobalVariables;

 import org.kuali.rice.kns.util.KNSConstants;

 import org.kuali.rice.kns.util.KNSPropertyConstants;

 import org.kuali.rice.kns.util.ObjectUtils;

 import org.kuali.rice.kns.web.ui.Field;

 import org.kuali.rice.kns.web.ui.Row;

 /**

  * This class is the lookup helper for {@link org.kuali.rice.kns.document.authorization.PessimisticLock} objects

  *

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

  *

  */

 public class PessimisticLockLookupableHelperServiceImpl extends AbstractLookupableHelperServiceImpl {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(PessimisticLockLookupableHelperServiceImpl.class);

     private static final long serialVersionUID = -5839142187907211804L;

     private static final String OWNER_PRINCIPAL_ID_PROPERTY_NAME = "ownedByPrincipalIdentifier";

     private static final String OWNER_PRINCIPAL_NAME_PROPERTY_NAME = "ownedByUser.principalName";

     private List<Row> localRows;

     /**

      * Hides the applicable links when the PessimisticLock is not owned by the current user

      *

      * @see org.kuali.rice.kns.lookup.LookupableHelperService#getCustomActionUrls(org.kuali.rice.kns.bo.BusinessObject, java.util.List, java.util.List pkNames)

      */

     @Override

     public List<HtmlData> getCustomActionUrls(BusinessObject businessObject, List pkNames) {

         PessimisticLock lock = (PessimisticLock)businessObject;

         if ( (lock.isOwnedByUser(GlobalVariables.getUserSession().getPerson())) || (KNSServiceLocatorWeb.getPessimisticLockService().isPessimisticLockAdminUser(GlobalVariables.getUserSession().getPerson())) ) {

             List<HtmlData> anchorHtmlDataList = new ArrayList<HtmlData>();

             anchorHtmlDataList.add(getUrlData(businessObject, KNSConstants.DELETE_METHOD, pkNames));

             return anchorHtmlDataList;

         } else {

             return super.getEmptyActionUrls();

         }

     }

     /**

      * This overridden method checks whether the user is an admin user according to {@link PessimisticLockService#isPessimisticLockAdminUser(Person)} and if the user is not an admin user the user field is set to Read Only and the lookup field

      *

      * @see org.kuali.rice.kns.lookup.AbstractLookupableHelperServiceImpl#getRows()

      */

     @Override

     public List<Row> getRows() {

         Person currentUser = GlobalVariables.getUserSession().getPerson();

         if (KNSServiceLocatorWeb.getPessimisticLockService().isPessimisticLockAdminUser(currentUser)) {

             return super.getRows();

         } else {

             if ( (ObjectUtils.isNull(localRows)) || localRows.isEmpty() ) {

                 List<Field> fieldList = new ArrayList<Field>();

                 int numColumns = -1;

                 // hide a field and forcibly set a field

                 for (Iterator<Row> iterator = super.getRows().iterator(); iterator.hasNext();) {

                     Row row = (Row) iterator.next();

                     if (numColumns == -1) {

                             numColumns = row.getFields().size();

                     }

                     for (Iterator<Field> iterator2 = row.getFields().iterator(); iterator2.hasNext();) {

                         Field field = (Field) iterator2.next();

                         if (!(KNSPropertyConstants.OWNED_BY_USER + "." + KIMPropertyConstants.Person.PRINCIPAL_NAME).equals(field.getPropertyName()) &&

                                         !Field.BLANK_SPACE.equals(field.getFieldType())) {

                             fieldList.add(field);

                         }

                     }

                 }

                 // Since the removed field is the first one in the list, use FieldUtils to re-wrap the remaining fields accordingly.

                 localRows = FieldUtils.wrapFields(fieldList, numColumns);

             }

             return localRows;

         }

     }

     /**

      * This method implementation is used to search for objects

      *

      * @see org.kuali.rice.kns.lookup.AbstractLookupableHelperServiceImpl#getSearchResults(java.util.Map)

      */

     @Override

     public List<? extends BusinessObject> getSearchResults(Map<String, String> fieldValues) {

         // remove hidden fields

         LookupUtils.removeHiddenCriteriaFields( getBusinessObjectClass(), fieldValues );

         // force criteria if not admin user

         Person currentUser = GlobalVariables.getUserSession().getPerson();

         if (!KNSServiceLocatorWeb.getPessimisticLockService().isPessimisticLockAdminUser(currentUser)) {

             fieldValues.put(KNSPropertyConstants.OWNED_BY_PRINCIPAL_ID,GlobalVariables.getUserSession().getPerson().getPrincipalId());

         }

         //set owner's principal id and remove owner principal name field 

         String principalName = fieldValues.get(OWNER_PRINCIPAL_NAME_PROPERTY_NAME);

         if (!StringUtils.isEmpty(principalName)) {

             Principal principal = KimApiServiceLocator.getIdentityManagementService().getPrincipalByPrincipalName(principalName);

             if (principal != null) { 

                 fieldValues.put(OWNER_PRINCIPAL_ID_PROPERTY_NAME, principal.getPrincipalId());

             }

             fieldValues.remove(OWNER_PRINCIPAL_NAME_PROPERTY_NAME);

         }

         setBackLocation(fieldValues.get(KNSConstants.BACK_LOCATION));

         setDocFormKey(fieldValues.get(KNSConstants.DOC_FORM_KEY));

         setReferencesToRefresh(fieldValues.get(KNSConstants.REFERENCES_TO_REFRESH));

         if (LOG.isInfoEnabled()) {

                 LOG.info("Search Criteria: " + fieldValues);

         }

         //replace principal name with principal id in fieldValues

         List searchResults;

         searchResults = (List) getLookupService().findCollectionBySearchHelper(getBusinessObjectClass(), fieldValues, true);

         // sort list if default sort column given

         List defaultSortColumns = getDefaultSortColumns();

         if (defaultSortColumns.size() > 0) {

             Collections.sort(searchResults, new BeanPropertyComparator(getDefaultSortColumns(), true));

         }

         return searchResults;

     }

     @Override

     public void validateSearchParameters(Map fieldValues) {

         super.validateSearchParameters(fieldValues);

         if (StringUtils.isNotEmpty((String)fieldValues.get(OWNER_PRINCIPAL_NAME_PROPERTY_NAME))) {

             Person person = KimApiServiceLocator.getPersonService().getPersonByPrincipalName((String)fieldValues.get(OWNER_PRINCIPAL_NAME_PROPERTY_NAME));

             if (person == null) {

                 String attributeLabel = getDataDictionaryService().getAttributeLabel(getBusinessObjectClass(), OWNER_PRINCIPAL_NAME_PROPERTY_NAME);

                 GlobalVariables.getMessageMap().putError(OWNER_PRINCIPAL_NAME_PROPERTY_NAME, RiceKeyConstants.ERROR_EXISTENCE, attributeLabel);

             } 

         }

     }

 }