/**
    * 
    */
   package de.tivsource.page.admin.backup;
   
   import java.io.File;
   import java.io.FileInputStream;
   import java.io.FileOutputStream;
   import java.io.IOException;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipOutputStream;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  /**
   * @author Marc Michele
   *
   */
  public class BackupFiles {
  
      /**
       * Statischer Logger der Klasse.
       */
      private static final Logger LOGGER = LogManager.getLogger(BackupFiles.class);
  
      private static byte[] buffer = new byte[1024];
  
      public static File getZipFile() throws IOException {
          LOGGER.info("getZipFile() aufgerufen.");
  
          // Zip-Datei erstellen und Stream bereitstellen.
          File zipFile = File.createTempFile("complete_tivpage", "zip");
          ZipOutputStream outZipFile = new ZipOutputStream(new FileOutputStream(zipFile));
  
          File folder = new File("/var/www/html/uploads/");
          File[] listOfFiles = folder.listFiles();
          LOGGER.debug("Anzahl der Dateien: " + listOfFiles.length);
          for (int i = 0; i < listOfFiles.length; i++) {
              if (listOfFiles[i].isFile()) {
                  LOGGER.debug("Füge die Datei " + listOfFiles[i].getName() + " zur Zip-Datei hinzu.");
                  addData(listOfFiles[i], outZipFile, listOfFiles[i].getName());
              } 
          }
  
          // Schließe die Zip-Datei.
          outZipFile.close();
  
          return zipFile;
      }
  
      private static void addData(File file, ZipOutputStream zipOutputStream,
              String filename) throws IOException {
  
          FileInputStream fileInputStream = new FileInputStream(file);
  
          // Ab hier beginnt der Exhibition Teil
          zipOutputStream.putNextEntry(new ZipEntry(filename));
  
          // Transfer bytes from the file to the ZIP file
          int len;
          while ((len = fileInputStream.read(buffer)) > 0) {
              zipOutputStream.write(buffer, 0, len);
          }
  
          zipOutputStream.closeEntry();
          fileInputStream.close();
      }
  
      
      
  }// Ende class