package org.openslx.satellitedaemon.ftp;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.net.ftp.FTPClient;

public class FtpUpDownUtil {
	   /**
	    * FTP-Dateienliste.
	    * @return String-Array der Dateinamen auf dem FTP-Server
	    */
	   public static String[] list( String host, int port, String usr, String pwd ) throws IOException
	   {
	      FTPClient ftpClient = new FTPClient();
	      String[]  filenameList;

	      try {
	         ftpClient.connect( host, port );
	         ftpClient.login( usr, pwd );
	         filenameList = ftpClient.listNames();
	         ftpClient.logout();
	      } finally {
	         ftpClient.disconnect();
	      }

	      return filenameList;
	   }

	   /**
	    * FTP-Client-Download.
	    * @return true falls ok
	    */
	   public static boolean download( String localResultFile, String remoteSourceFile,
	         String host, int port, String usr, String pwd, boolean showMessages ) throws IOException
	   {
	      FTPClient        ftpClient = new FTPClient();
	      FileOutputStream fos = null;
	      boolean          resultOk = true;

	      try {
	         ftpClient.connect( host, port );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         resultOk &= ftpClient.login( usr, pwd );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         fos = new FileOutputStream( localResultFile );
	         resultOk &= ftpClient.retrieveFile( remoteSourceFile, fos );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         resultOk &= ftpClient.logout();
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	      } finally {
	         try { if( fos != null ) { fos.close(); } } catch( IOException e ) {/* nothing to do */}
	         ftpClient.disconnect();
	      }

	      return resultOk;
	   }

	   /**
	    * FTP-Client-Upload.
	    * @return true falls ok
	    */
	   public static boolean upload( String localSourceFile, String remoteResultFile,
	         String host, int port, String usr, String pwd, boolean showMessages ) throws IOException
	   {
	      FTPClient       ftpClient = new FTPClient();
	      FileInputStream fis = null;
	      boolean         resultOk = true;

	      try {
	         ftpClient.connect( host, port );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         resultOk &= ftpClient.login( usr, pwd );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         fis = new FileInputStream( localSourceFile );
	         resultOk &= ftpClient.storeFile( remoteResultFile, fis );
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	         resultOk &= ftpClient.logout();
	         if( showMessages ) { System.out.println( ftpClient.getReplyString() ); }
	      } finally {
	         try { if( fis != null ) { fis.close(); } } catch( IOException e ) {/* nothing to do */}
	         ftpClient.disconnect();
	      }

	      return resultOk;
	   }
}