/*

  * Copyright 2005-2008 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.kew.rule.web;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.struts.action.ActionForm;

 import org.apache.struts.action.ActionForward;

 import org.apache.struts.action.ActionMapping;

 import org.kuali.rice.kew.doctype.bo.DocumentType;

 import org.kuali.rice.kew.rule.RuleBaseValues;

 import org.kuali.rice.kew.rule.bo.RuleTemplate;

 import org.kuali.rice.kew.service.KEWServiceLocator;

 import org.kuali.rice.kew.util.Utilities;

 import org.kuali.rice.kew.web.KewKualiAction;

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

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

 /**

  * This class handles Actions for the DisbursementVoucher.

  */

 public class RuleAction extends KewKualiAction {

     private static final String RULE_TEMPLATE_NAME_PROPERTY = "ruleTemplateName";

     private static final String DOC_TYPE_NAME_PROPERTY = "ruleTemplateName";

     private static final String RULE_TEMPLATE_ERROR = "rule.template.name.required";

     private static final String DOCUMENT_TYPE_ERROR = "rule.docType.name.required";

     public ActionForward createRule(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception {

         RuleForm form = (RuleForm) actionForm;

         if (!validateCreateRule(form)) {

             return mapping.findForward(getDefaultMapping());

         }

         return new ActionForward(generateMaintenanceUrl(request, form), true);

     }

     public ActionForward clearInitFields(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception {

         RuleForm form = (RuleForm) actionForm;

         form.clearSearchableAttributeProperties();

         return mapping.findForward(getDefaultMapping());

     }

     public ActionForward cancel(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception {

         return mapping.findForward("actionTaken");

     }

     protected String generateMaintenanceUrl(HttpServletRequest request, RuleForm form) {

         return getBasePath(request) + "/kr/" + KNSConstants.MAINTENANCE_ACTION + "?" +

             KNSConstants.DISPATCH_REQUEST_PARAMETER + "=" + KNSConstants.START_METHOD + "&" +

             KNSConstants.BUSINESS_OBJECT_CLASS_ATTRIBUTE + "=" + RuleBaseValues.class.getName() +  "&" +

             WebRuleUtils.DOCUMENT_TYPE_NAME_PARAM + "=" + form.getDocumentTypeName() + "&" +

             WebRuleUtils.RULE_TEMPLATE_NAME_PARAM + "=" + form.getRuleTemplateName();

     }

     protected boolean validateCreateRule(RuleForm form) {

         if (Utilities.isEmpty(form.getRuleTemplateName())) {

             GlobalVariables.getMessageMap().putError(RULE_TEMPLATE_NAME_PROPERTY, RULE_TEMPLATE_ERROR);

         } else {

             RuleTemplate ruleTemplate = KEWServiceLocator.getRuleTemplateService().findByRuleTemplateName(form.getRuleTemplateName().trim());

             if (ruleTemplate == null) {

                 GlobalVariables.getMessageMap().putError(RULE_TEMPLATE_NAME_PROPERTY, RULE_TEMPLATE_ERROR);

             }

         }

         if (Utilities.isEmpty(form.getDocumentTypeName())) {

             GlobalVariables.getMessageMap().putError(DOC_TYPE_NAME_PROPERTY, DOCUMENT_TYPE_ERROR);

         } else {

             DocumentType docType = KEWServiceLocator.getDocumentTypeService().findByName(form.getDocumentTypeName());

             if (docType == null) {

                 GlobalVariables.getMessageMap().putError(DOC_TYPE_NAME_PROPERTY, DOCUMENT_TYPE_ERROR);

             }

         }

         return GlobalVariables.getMessageMap().isEmpty();

     }

 }