/*

  * 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.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.rule.RuleDelegation;

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

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

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

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

 /**

  * Struts action for handling the initial Delegate Rule screen for selecting

  * the parent rule and responsibility. 

  * 

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

  *

  */

 public class DelegateRuleAction extends KewKualiAction {

         private static final String PARENT_RULE_PROPERTY = "parentRuleId";

         private static final String PARENT_RESPONSIBILITY_PROPERTY = "parentResponsibilityId";

         private static final String PARENT_RULE_ERROR = "delegateRule.parentRule.required";

         private static final String PARENT_RESPONSIBILITY_ERROR = "delegateRule.parentResponsibility.required";

         private static final String DELEGATE_RULE_INVALID_ERROR = "delegateRule.delegateRuleTemplate.invalid";

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

                 DelegateRuleForm form = (DelegateRuleForm) actionForm;

                 if (!validateCreateDelegateRule(form)) {

                         return mapping.findForward(getDefaultMapping());

                 }

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

         }

         protected boolean validateCreateDelegateRule(DelegateRuleForm form) {

                 if (form.getParentRule() == null) {

                         GlobalVariables.getMessageMap().putError(PARENT_RULE_PROPERTY, PARENT_RULE_ERROR);

                 } else {

                         RuleTemplate ruleTemplate = form.getParentRule().getRuleTemplate();

                         if (ruleTemplate == null

                                 || ruleTemplate.getDelegationTemplate() == null) {

                                 GlobalVariables.getMessageMap().putError(PARENT_RULE_PROPERTY, DELEGATE_RULE_INVALID_ERROR);

                         }

                 }

                 if (form.getParentResponsibility() == null) {

                         GlobalVariables.getMessageMap().putError(PARENT_RESPONSIBILITY_PROPERTY, PARENT_RESPONSIBILITY_ERROR);

                 }

                 return GlobalVariables.getMessageMap().isEmpty();

         }

         protected String generateMaintenanceUrl(HttpServletRequest request, DelegateRuleForm form) {

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

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

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

                         WebRuleUtils.RESPONSIBILITY_ID_PARAM + "=" + form.getParentResponsibilityId() + "&" +

                         WebRuleUtils.RULE_TEMPLATE_ID_PARAM + "=" + form.getParentRule().getRuleTemplate().getDelegationTemplateId() + "&" +

                         WebRuleUtils.DOCUMENT_TYPE_NAME_PARAM + "=" + form.getParentRule().getDocTypeName();

         }

 }