/*
    * Copyright 2005-2009 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.kew.edl.components;
  
  import org.kuali.rice.kew.edl.EDLXmlUtils;
  import org.kuali.rice.kew.edl.RequestParser;
  import org.kuali.rice.kim.bo.entity.KimPrincipal;
  import org.kuali.rice.kim.service.KIMServiceLocator;
  import org.w3c.dom.Element;
  import org.w3c.dom.NodeList;
  
  
  /**
   * Matches university ID param to UserService to validate universityId.  Returns error message if 
   * universityId does NOT match.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class UniversityIdWorkflowEDLConfigComponent extends SimpleWorkflowEDLConfigComponent {
    
  	private boolean required;
  
  	@Override
  	public Element getReplacementConfigElement(Element element) {
  		Element replacementEl = (Element)element.cloneNode(true);
  		Element type = (Element)((NodeList)replacementEl.getElementsByTagName(EDLXmlUtils.TYPE_E)).item(0);
  		type.setTextContent("text");
  		
  		//find the validation element if required is true set a boolean and determin if blanks
  		//are allowed based on that
  		Element validation = (Element)((NodeList)replacementEl.getElementsByTagName(EDLXmlUtils.VALIDATION_E)).item(0);
  		if (validation != null && validation.getAttribute("required").equals("true")) {
  			required = true;
  		}
  		return replacementEl;
  	}
  
  	@Override
  	public String getErrorMessage(Element originalConfigElement, RequestParser requestParser, MatchingParam param) {
  		
  		/*
           * <documentContent>
           *   <applicationContent>
           *     <data edlName="Test2">
           *       <version current="true" date="Thu Sep 14 14:44:43 EDT 2006" version="0">
           *         <field name="networkId">
           *           <value>jitrue</value>
           *         </field>
           *         <field name="universityId">
           *           <value>0000394389</value>
           *         </field>
           *       </version>
           *     </data>
           *   </applicationContent>
           * </documentContent>
  		 */
  
  		if (param.getParamValue().length() == 0 && required == true) {
  			//empty and required so send error
  			return ("University ID is a required field");
  		} else if (param.getParamValue().length() == 0 && required == false) { 
  			//empty but not required then just return 
  			return null;			
  		} else {
  			//not blank validate as normal whether required or not
  			String employeeId = param.getParamValue();
  			
  			KimPrincipal principal = KIMServiceLocator.getIdentityManagementService().getPrincipal(employeeId);
  			if (principal == null) {
  				return ("The value " + employeeId + " is an invalid University ID");
  			}
  
  			
  		}
  		return null;
  	}
  
  	public boolean isRequired() {
  		return required;
  	}
  
  	public void setRequired(boolean required) {
  		this.required = required;
  	}
  
 
 }