package de.nplusc.izc.tools.IOtools;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class ZipUtils
{
private static final Logger l = LogManager.getLogger();
private List<String> fileList;
private String OUTPUT_ZIP_FILE ;
private String SOURCE_FOLDER ;

public ZipUtils(String out,String base)
{
    
   fileList = new ArrayList<>();
   OUTPUT_ZIP_FILE=out;
   SOURCE_FOLDER=base;
   l.trace("SOURCE:|"+base);
    generateFileList(new File(base));
    zipIt(out);
}


public void zipIt(String zipFile)
{
   byte[] buffer = new byte[1024];
   String source = "";
   FileOutputStream fos = null;
   ZipOutputStream zos = null;
   try
   {
     fos = new FileOutputStream(zipFile);
     zos = new ZipOutputStream(fos);

     l.info("Output to Zip : " + zipFile);
     FileInputStream in = null;

     for (String file : this.fileList)
     {
         l.trace("file@"+SOURCE_FOLDER+"|"+file);
        l.info("File Added : " + file);
        ZipEntry ze = new ZipEntry(file);
        zos.putNextEntry(ze);
        try
        {
           in = new FileInputStream(SOURCE_FOLDER + File.separator + file);
           int len;
           while ((len = in.read(buffer)) > 0)
           {
              zos.write(buffer, 0, len);
           }
        }
        finally
        {
           in.close();
        }
     }

     zos.closeEntry();
     l.info("Folder successfully compressed");

  }
  catch (IOException ex)
  {
     ex.printStackTrace();
  }
  finally
  {
     try
     {
        zos.close();
     }
     catch (IOException e)
     {
        e.printStackTrace();
     }
  }
}

public void generateFileList(File node)
{
  // add file only
  if (node.isFile())
  {
     fileList.add(generateZipEntry(node.toString()));

  }

  if (node.isDirectory())
  {
     String[] subNote = node.list();
     for (String filename : subNote)
     {
        generateFileList(new File(node, filename));
     }
  }
}

private String generateZipEntry(String file)
{
   return FileTK.getRelativePath(file, SOURCE_FOLDER).substring(3);
}
}