package com.aurea.maven.plugins.sonic.utils;

 import java.io.BufferedInputStream;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileOutputStream;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipInputStream;

 /**

  *

  */

 public class ZipUtilities {

   /**

    * @param _filename

    *          filename

    * @param _unzipDir

    *          unzipDir

    */

   public static void doUnzipAction(final String _filename, final String _unzipDir) {

     final int bufferSize = 1024;

     FileOutputStream dest = null;

     ZipInputStream zis;

     try {

       zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(new File(_filename))));

       ZipEntry entry;

       new File(_unzipDir).mkdirs();

       while ((entry = zis.getNextEntry()) != null) {

         int count;

         byte[] data = new byte[bufferSize];

         String targetFile = _unzipDir + "/" + entry.getName();

         createSubDirectory(_unzipDir, entry);

         // getLog().info("Unzip file " + targetFile);

         if (!entry.isDirectory()) {

           dest = new FileOutputStream(targetFile);

           while ((count = zis.read(data, 0, bufferSize)) != -1) {

             dest.write(data, 0, count);

           }

           dest.flush();

           dest.close();

         }

         dest = null;

       } // while entries

       zis.close();

     } catch (Exception e) {

       // TODO this could be done nicer

       e.printStackTrace();

       throw new RuntimeException(e);

     }

   }

   private static void createSubDirectory(final String _unzipDir, final ZipEntry _entry) {

     /*

      * entry.isDirectory() returns true if the entry name ends with "/" When unzipping however, entries in

      * subdirectories can preceed the entry of the directory

      */

     String name = _entry.getName();

     String fileDir;

     if (name.indexOf("\\") > 0) {

       fileDir = name.substring(0, name.lastIndexOf("\\"));

     } else if (name.indexOf("/") > 0) {

       fileDir = name.substring(0, name.lastIndexOf("/"));

     } else {

       // no subdir for this ZipEntry

       return;

     }

     // check is subdir already exists

     File newdir = new File(_unzipDir + File.separator + fileDir);

     if (!newdir.exists()) {

       newdir.mkdirs();

     }

   }

 }