/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache 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.apache.org/licenses/LICENSE-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.
   */
  package org.apache.maven.plugins.changes.model;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * Abstract class with helper methods for {@link Action}.
   */
  public abstract class AbstractAction {
  
      private List<DueTo> dueTosList;
  
      private List<String> fixedIssueList;
  
      public abstract String getDueTo();
  
      public abstract String getDueToEmail();
  
      public abstract String getFixedIssuesString();
  
      /**
       * Parse due-to and due-to-email attributes.
       *
       * @return a List of due-to person
       */
      public List<DueTo> getDueTos() {
          if (dueTosList != null) {
              return dueTosList;
          }
          List<DueTo> result = new ArrayList<>();
          List<String> dueTos = new ArrayList<>();
          List<String> dueToEmails = new ArrayList<>();
  
          if (getDueTo() != null) {
              Arrays.stream(getDueTo().split(","))
                      .map(String::trim)
                      .filter(s -> !s.isEmpty())
                      .forEach(dueTos::add);
          }
  
          if (getDueToEmail() != null) {
              Arrays.stream(getDueToEmail().split(",")).map(String::trim).forEach(dueToEmails::add);
          }
  
          while (dueToEmails.size() < dueTos.size()) {
              dueToEmails.add("");
          }
  
          for (int i = 0; i < dueTos.size(); i++) {
              DueTo dueTo = new DueTo();
              dueTo.setName(dueTos.get(i));
              dueTo.setEmail(dueToEmails.get(i));
              result.add(dueTo);
          }
          dueTosList = Collections.unmodifiableList(result);
          return dueTosList;
      }
  
      /**
       * Parse getFixedIssues attribute.
       *
       * @return a list of fixed issues
       */
      public List<String> getFixedIssues() {
          if (fixedIssueList != null) {
              return fixedIssueList;
          }
          List<String> result;
          if (getFixedIssuesString() != null) {
              result = Arrays.stream(getFixedIssuesString().split(","))
                      .map(String::trim)
                      .filter(s -> !s.isEmpty())
                      .collect(Collectors.toList());
          } else {
              result = Collections.emptyList();
          }
  
          fixedIssueList = Collections.unmodifiableList(result);
         return fixedIssueList;
     }
 }