/*
    * Copyright 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.ole.module.purap.document.validation.impl;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.module.purap.PurapConstants;
  import org.kuali.ole.module.purap.PurapKeyConstants;
  import org.kuali.ole.module.purap.PurapPropertyConstants;
  import org.kuali.ole.module.purap.document.PurchaseOrderDocument;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.document.validation.GenericValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.kim.api.identity.PersonService;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.MessageMap;
  import org.kuali.rice.krad.util.ObjectUtils;
  
  public class PurchaseOrderAssignedUserValidation extends GenericValidation {
      private PersonService personService;
  
      /**
       * Validation to check that the assigned user exists in the system.
       *
       * @return boolean false if the assigned user doesn't exist in the system.
       */
      public boolean validate(AttributedDocumentEvent event) {
          PurchaseOrderDocument poDocument = (PurchaseOrderDocument) event.getDocument();
          MessageMap errorMap = GlobalVariables.getMessageMap();
          errorMap.clearErrorPath();
          errorMap.addToErrorPath(PurapConstants.DETAIL_TAB_ERRORS);
          boolean valid = true;
  
          // assigned user is not a required field
          String principalName = poDocument.getAssignedUserPrincipalName();
          if (StringUtils.isEmpty(principalName))
              return true;
  
          // check to see if the person exists in the database
          //if (ObjectUtils.isNull(personService.getPersonByPrincipalName(principalName))) {
          // the following if is equivalent to the above if, since the name->ID conversion is done when the PO form is submit
          // so if ID is null that means no person is found by the name
          if (ObjectUtils.isNull(poDocument.getAssignedUserPrincipalId())) {
              valid = false;
              errorMap.putError(PurapPropertyConstants.ASSIGNED_USER_PRINCIPAL_NAME, PurapKeyConstants.ERROR_NONEXIST_ASSIGNED_USER);
          }
  
          errorMap.clearErrorPath();
          return valid;
      }
  
      /**
       * @return Returns the personService.
       */
      protected PersonService getPersonService() {
          if (personService == null)
              personService = SpringContext.getBean(PersonService.class);
          return personService;
      }
  
  }