/******************************************************************************
    * CopyFile.java - Copy a file
    * 
    * PicMan - The BuckoSoft Picture Manager in Java
    * Copyright(c) 2009 - Dick Balaska
    * 
    */
   package com.buckosoft.PicMan.business.util;
   
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  import com.buckosoft.PicMan.business.PicManFacade;
  
  /** Copy a file from point a to point b
   * @author Dick Balaska
   * @since 2009/07/17
   * @see <a href="http://cvs.buckosoft.com/Projects/java/PicMan/PicMan/src/com/buckosoft/PicMan/business/util/CopyFile.java">CopyFile.java</a>
   * @see com.buckosoft.PicMan.business.mosaic.engine
   */
  public class CopyFile {
  
  	private static SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
  	public static void makeBackup(PicManFacade pmf, File file) {
  			String parent = file.getParent();
  			parent += ("/save");
  			File saveDir = new File(parent);
  			if (!saveDir.exists()) {
  				if (!saveDir.mkdir()) {
  					Exception e1 = new Exception("Can't create '" + parent + "'");
  					pmf.addError(e1);
  					return;
  				}
  			}
  			if (!saveDir.isDirectory()) {
  				Exception e1 = new Exception("backup dir exists and is not a dir '" + parent + "'");
  				pmf.addError(e1);
  				return;
  			}
  			File backupFile = new File(saveDir, file.getName());
  			if (backupFile.exists()) {
  				StringBuffer sb = new StringBuffer();
  				sb.append(file.getName().substring(0, file.getName().length() - 4));
  				sb.append("_");
  				Date d = new Date(backupFile.lastModified());
  				String t = sdf.format(d);
  				int dd = 99999999 - Integer.parseInt(t);
  				sb.append("" + dd);
  				sb.append(".jpg");
  				File backupFileRenamed = new File(saveDir, sb.toString());
  				if (!backupFile.renameTo(backupFileRenamed)) {
  					String es = "Failed to rename backup from '" + file.getName() + "' to '" + sb.toString() + "'";
  					Exception e2 = new Exception(es);
  					//logger.error(e2);
  					pmf.addError(e2);
  					//return;
  				}
  			}
  			try {
  				CopyFile.copyFile(file, backupFile, null);
  			} catch (IOException e) {
  				Exception e3 = new Exception("Failed to copy file '" + file.getName() + "' to '" + backupFile.getName() + "'", e);
  				pmf.addError(e3);
  			}
  		
  	}
  	public static void copyFile(File source, File dest, byte[] buf) throws IOException {
  		if(!dest.exists()) {
  			dest.createNewFile();
  		}
  		if (buf == null)
  			buf = new byte[4096];
  		InputStream in = null;
  		OutputStream out = null;
  		try {
  			in = new FileInputStream(source);
  			out = new FileOutputStream(dest);
  
  			// Transfer bytes from in to out
  			int len;
  			while ((len = in.read(buf)) > 0) {
  				out.write(buf, 0, len);
  			}
  			in.close();
  			out.close();
  			dest.setLastModified(source.lastModified());
  			
  		}
  		finally {
  			if(in != null) {
  				in.close();
  			}
  			if(out != null) {
 				out.close();
 			}
 		}
 	}	
 	
 }