package fr.ifremer.tutti.ui.swing.updater;
   
   /*
    * #%L
    * Tutti :: UI Updater
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2012 - 2015 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/gpl-3.0.html>.
   * #L%
   */
  
  import java.io.IOException;
  import java.nio.file.FileVisitResult;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.PathMatcher;
  import java.nio.file.SimpleFileVisitor;
  import java.nio.file.attribute.BasicFileAttributes;
  
  /**
   * Created on 1/26/15.
   *
   * @author Tony Chemit - chemit@codelutin.com
   * @since 3.12
   */
  public class DeleteHelper {
  
      public static void deleteDirectories(Path path, String glob) throws IOException {
  
          PathMatcher matcher = path.getFileSystem().getPathMatcher("glob:" + glob);
          if (Files.isDirectory(path)) {
  
              DeleteDirectories deleteDirectories = new DeleteDirectories(matcher);
              Files.walkFileTree(path, deleteDirectories);
          }
  
      }
  
      public static void deleteFiles(Path path, String glob) throws IOException {
          if (Files.isDirectory(path)) {
  
              PathMatcher matcher = path.getFileSystem().getPathMatcher("glob:" + glob);
              DeleteFiles deleteFiles = new DeleteFiles(matcher);
              Files.walkFileTree(path, deleteFiles);
          }
  
      }
  
      public static void deleteDirectory(Path path) throws IOException {
          if (Files.isDirectory(path)) {
              DeleteDirectory deleteDirectory = new DeleteDirectory();
              Files.walkFileTree(path, deleteDirectory);
          }
      }
  
      public static void deleteDirectoryOnExit(Path path) throws IOException {
          if (Files.isDirectory(path)) {
              DeleteDirectoryOnExit deleteDirectory = new DeleteDirectoryOnExit();
              Files.walkFileTree(path, deleteDirectory);
          }
      }
  
      /**
       * To delete the given directory.
       */
      public static class DeleteDirectory extends SimpleFileVisitor<Path> {
  
          @Override
          public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
              Files.deleteIfExists(file);
              return FileVisitResult.CONTINUE;
          }
  
          @Override
          public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
              System.out.println("Delete directory: " + dir);
              Files.deleteIfExists(dir);
              return FileVisitResult.CONTINUE;
          }
  
      }
  
      /**
       * To delete the given directory on exit.
      */
     public static class DeleteDirectoryOnExit extends SimpleFileVisitor<Path> {
 
         @Override
         public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
             System.out.println("Delete directory on exit: " + dir);
             dir.toFile().deleteOnExit();
             return FileVisitResult.CONTINUE;
         }
 
         @Override
         public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
             file.toFile().deleteOnExit();
             return FileVisitResult.CONTINUE;
         }
 
     }
 
     /**
      * To delete all files that are matching the given matcher.
      */
     public static class DeleteFiles extends SimpleFileVisitor<Path> {
 
         private final PathMatcher matcher;
 
         protected DeleteFiles(PathMatcher matcher) {
             this.matcher = matcher;
         }
 
         @Override
         public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
 
             // If the file name matches the glob or if no matcher, delete the file
             if (matcher.matches(file.getFileName())) {
                 System.out.println("Delete file: " + file);
                 Files.deleteIfExists(file);
             }
             return FileVisitResult.CONTINUE;
         }
 
     }
 
     /**
      * To delete all directories which names are matching the given matcher.
      */
     public static class DeleteDirectories extends SimpleFileVisitor<Path> {
 
         private final PathMatcher matcher;
 
         protected DeleteDirectories(PathMatcher matcher) {
             this.matcher = matcher;
         }
 
         private Path deleteDir;
 
         @Override
         public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
 
             if (deleteDir == null) {
                 if (matcher.matches(dir.getFileName())) {
                     System.out.println("Delete directory: " + dir);
                     deleteDir = dir;
                 }
             }
             return FileVisitResult.CONTINUE;
 
         }
 
         @Override
         public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
 
             if (deleteDir != null) {
                 Files.deleteIfExists(file);
             }
             return FileVisitResult.CONTINUE;
 
         }
 
         @Override
         public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
 
             if (deleteDir != null) {
 
                 Files.deleteIfExists(dir);
 
                 if (dir.equals(deleteDir)) {
                     deleteDir = null;
                 }
 
             }
 
             return FileVisitResult.CONTINUE;
 
         }
 
     }
 }