/**
    * Copyright 2004-2014 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.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.kpme.core.api.util;
  
  
  import org.apache.commons.collections.MapUtils;
  import org.apache.commons.lang.ObjectUtils;
  import org.apache.commons.lang.StringUtils;
  import org.joda.time.LocalDate;
  import org.kuali.kpme.core.api.assignment.Assignment;
  
  import java.util.*;
  
  public class KpmeUtils {
      public static String formatAssignmentKey(String groupKeyCode, Long jobNumber, Long workArea, Long task) {
          String assignmentKey = StringUtils.EMPTY;
  
          String jobNumberString = ObjectUtils.toString(jobNumber, "0");
          String workAreaString = ObjectUtils.toString(workArea, "0");
          String taskString = ObjectUtils.toString(task, "0");
  
          if (!jobNumberString.equals("0") || !workAreaString.equals("0") || !taskString.equals("0")) {
              assignmentKey = StringUtils.join(new String[] {groupKeyCode, jobNumberString, workAreaString, taskString}, HrApiConstants.ASSIGNMENT_KEY_DELIMITER);
          }
  
          return assignmentKey;
      }
  
      public static List<Assignment> getUniqueAssignments(Map<LocalDate, List<Assignment>> history) {
          if (MapUtils.isEmpty(history)) {
              return Collections.emptyList();
          }
          Set<Assignment> allAssignments = new HashSet<Assignment>();
          for (List<Assignment> assignList : history.values()) {
              allAssignments.addAll(assignList);
          }
          return new ArrayList<Assignment>(allAssignments);
      }
  
      public static <T extends Comparable<? super T>> int nullSafeCompare(T s1, T s2) {
          if(s1 == null && s2 != null) { return -1;}
          if(s1 != null && s2 == null) { return 1;}
          if(s1 == null) { return 0;}
          return s1.compareTo(s2);
      }
  }