code: /*--------------------------------------------------------------*
    Copyright (C) 2006-2020 OpenSim Ltd.
  
    This file is distributed WITHOUT ANY WARRANTY. See the file
    'License' for details on this and other legal matters.
  *--------------------------------------------------------------*/
  
  package org.omnetpp.scave.model.commands;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.List;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.omnetpp.scave.model.AnalysisItem;
  import org.omnetpp.scave.model.Folder;
  import org.omnetpp.scave.model.ModelObject;
  
  public class AddChartCommand implements ICommand {
  
      private Folder container;
      private AnalysisItem item;
      private String originalName;
      private int index;
  
      public AddChartCommand(Folder container, AnalysisItem item) {
          this(container, item, container.getItems().size());
      }
  
      public AddChartCommand(Folder container, AnalysisItem item, int index) {
          this.container = container;
          this.item = item;
          this.index = index;
          this.originalName = item.getName();
      }
  
      private static List<String> getAllChartNames(Folder container) {
          List<String> names = new ArrayList<String>();
  
          for (AnalysisItem i : container.getItems())
              names.add(i.getName());
  
          return names;
      }
  
      private static String makeNameUnique(List<String> existingNames, String name) {
          if (!existingNames.contains(name))
              return name;
          String nameWithoutNumber = name.replaceAll(" \\(\\d+\\)$", "");
          String pattern = "^" + Pattern.quote(nameWithoutNumber) + " \\((\\d+)\\)$";
  
          int maxNum = -1;
          for (String existing : existingNames) {
              int num = -1;
  
              if (existing.equals(nameWithoutNumber))
                  num = 0;
  
              Matcher matcher = Pattern.compile(pattern).matcher(existing);
              if (matcher.matches())
                  num = Integer.parseInt(matcher.group(1));
  
              if (num > maxNum)
                  maxNum = num;
          }
  
          return nameWithoutNumber + (maxNum == -1 ? "" : maxNum == 0 ? " (2)" : (" (" + (maxNum + 1) + ")"));
      }
  
      @Override
      public void execute() {
          item.setName(makeNameUnique(getAllChartNames(container), item.getName()));
          container.add(item, index);
      }
  
      @Override
      public void undo() {
          item.setName(originalName);
          container.remove(item);
      }
  
      @Override
      public void redo() {
          execute();
      }
  
      @Override
      public String getLabel() {
          return "Add chart";
      }
  
      @Override
      public Collection<ModelObject> getAffectedObjects() {
          return Arrays.asList((ModelObject)container, item);
      }
  
  }
  