/**
    * Copyright 2014 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.osedu.org/licenses/ECL-2.0
    *
    * 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.
   *
   * Created by pauldanielrichardson on 6/9/14
   */
  package org.kuali.student.enrollment.registration.client.service.impl.util;
  
  import org.codehaus.jackson.map.ObjectMapper;
  import org.codehaus.jackson.type.TypeReference;
  import org.kuali.student.enrollment.registration.client.service.dto.ConflictCourseResult;
  import org.kuali.student.enrollment.registration.client.service.dto.RegistrationValidationConflictCourseResult;
  import org.kuali.student.enrollment.registration.client.service.dto.RegistrationValidationMaxCreditResult;
  import org.kuali.student.enrollment.registration.client.service.dto.RegistrationValidationResult;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * This class contains utility methods for passing complex messaging out of ValidationResultInfo objects
   *
   * @author Kuali Student Team
   */
  public class RegistrationValidationResultsUtil {
      public static final Logger LOGGER = LoggerFactory.getLogger(RegistrationValidationResultsUtil.class);
  
      private RegistrationValidationResultsUtil() {
      }
  
      public static String marshallSimpleMessage(String messageKey) {
          return marshallResult(new RegistrationValidationResult(messageKey));
      }
  
      public static String marshallConflictCourseMessage(String messageKey, List<ConflictCourseResult> conflictingCourses) {
          return marshallResult(new RegistrationValidationConflictCourseResult(messageKey, conflictingCourses));
      }
  
      public static String marshallMaxCreditMessage(String messageKey, String maxCredits) {
          return marshallResult(new RegistrationValidationMaxCreditResult(messageKey, maxCredits));
      }
  
      public static String marshallResult(RegistrationValidationResult result) {
          ObjectMapper mapper = new ObjectMapper();
          String json = null;
          try {
              json = mapper.writeValueAsString(result);
          } catch (IOException ex) {
              LOGGER.error("Unable to marshall result object", ex);
          }
          return json;
      }
  
      public static Map<String, Object> unmarshallResult(String result) {
          ObjectMapper mapper = new ObjectMapper();
          try {
              TypeReference<HashMap<String, Object>> typeRef
                      = new TypeReference<HashMap<String, Object>>() {
              };
  
              return mapper.readValue(result, typeRef);
          } catch (IOException e) {
              LOGGER.error("Unable to marshall result object", e);
          }
          return null;
      }
  
  }