import java.io.*;
import java.net.*;
import java.util.zip.*;
import java.awt.*;
import java.awt.event.*;

// Author: John Pritchard-Williams
// Email : monojohnny@yahoo.com
// Version : 1.0
// Developed in Windows 98 environment, using JDK1.1.6 from sun
// Tested on Psion 5mx only - would appreciate confirmation on other platforms.
//
// Zippy was kept deliberately kept small (currently under 10k) - therefore minimal error
// handling is performed.
// FOR INSTANCE - NO "Overwrite y/n" dialogue is provided - zippy will simply overwrite
// files when extracting - it is advisable therefore to make use of the "LIST CONTENTS" feature !!
//
// Current known problems / 'features':
//  
// zippy can NOT handle absolute filenames (eg c:\temp\xyz.txt CANNOT be extracted).
// zippy currently SKIPS any "META-INF/MANIFEST.MF" files.
// zippy will ALWAYS try and use the directory "C:\DOCUMENTS\UNZIP" path
// - assumes "C:\DOCUMENTS" exists, and creates ~UNZIP if not present
// zippy will abort part-way-through an extraction process if a single file/directory extraction
// fails.
// zippy does not have an EPOC 'look and feel'
// 
// Possible future enhancements:
// 
// Provide a "select output directory" dialogue
// Provide handling for absolute filenames
// Bring look and feel in line with standard EPOC look and feel.
//
// NOTES ABOUT THIS SOURCE CODE
// This source code was realised 'cos I thought it might be of some use to other EPOC users
// - feel free to improve / modify / do whatever to it - FOR YOUR OWN USE ONLY.
//  PLEASE DO NOT MAKE PUBLIC ANY MODIFIED VERSIONS OF THIS CODE - in its source format or compiled format !!!
// Thanks !!! John


public class zippy extends Frame {
String filename,out_dir,in_dir,sep,drive_letter;
MenuItem o,l,x,e;
TextArea t;
String Version;

public static void main(String[] args) {
	new zippy();
}

zippy() {
		super("Zippy - No File Loaded");
// Set the version number here - gets echoed to the status area
		Version="1.0";
// Get the OS's path Separator character
		sep=File.separator;
// Set the drive letter up
		drive_letter="C:";
// Now build up the output path (for relative filenames)
		out_dir=drive_letter+sep+"Documents"+sep+"Unzip";
// Make sure we've got a sensible layout
		this.setLayout(new BorderLayout(10,10));	
// Make sure we have a way of closing the window !!
// Doesn't work in EPOC - no close widget - need a menu item / hotkey
		this.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) { close(); }
		});

// Setup the Main Menu
// Grey out List and Extract if filename is null
		
		MenuBar menubar=new MenuBar();
		this.setMenuBar(menubar);
		Menu file = new Menu("File");
		menubar.add(file);
		
		file.add(o=new MenuItem("Open Zip Archive",new MenuShortcut(KeyEvent.VK_O)));
		file.add(l=new MenuItem("List Contents of Zip Archive",new MenuShortcut(KeyEvent.VK_L)));
		file.add(x=new MenuItem("Extract Contents of Zip Archive",new MenuShortcut(KeyEvent.VK_X)));
		file.add(e=new MenuItem("Exit",new MenuShortcut(KeyEvent.VK_E)));

		if (filename == null) { x.setEnabled(false);}
		if (filename == null) { l.setEnabled(false);}
// End of menu items

// Now add the appropriate events on menu
		o.addActionListener(new ActionListener() { 
			public void actionPerformed(ActionEvent e) { open_zip(); }});

		l.addActionListener(new ActionListener() { 
			public void actionPerformed(ActionEvent e) { list_zip(); }});

		x.addActionListener(new ActionListener() { 
			public void actionPerformed(ActionEvent e) { extract_zip(); }});

		e.addActionListener(new ActionListener() { 
			public void actionPerformed(ActionEvent e) { close(); }});

// Create and add the TextArea
		t = new TextArea("Welcome to Zippy...\n",15,50);
		t.setEditable(false);
		this.add(t,"Center");
	
		this.pack();
		this.show();
// Now append the welcome text
		t.append("Zippy is freeware.  Use at your own risk !!!\n");
		t.append("Version :"+Version+"\n");
		t.append("Zippy will extract to :"+out_dir+"\n");
		t.append("Comments or questions to monojohnny@yahoo.com\n");
	}

void open_zip() {
		  int NumFiles,NumDirs;

		  FileDialog f = new FileDialog(this,"Open Archive",FileDialog.LOAD);
		  f.show();
		  filename=f.getFile();
		  in_dir=f.getDirectory();
		  if (filename != null) { 
			x.setEnabled(true);
			l.setEnabled(true);
		  	this.setTitle("Zippy - "+filename);
		  }
		  t.append("Opening "+filename+"...\n");
		  try {
			FileInputStream fis= new FileInputStream(in_dir+"\\"+filename);
			ZipInputStream zpis=new ZipInputStream(fis);
		
			ZipEntry zie;
			String zfilename;
			long filesize;
			boolean isDir;

			NumFiles=0; NumDirs=0;

			while ( ( zie=zpis.getNextEntry() ) != null)
			{
				zfilename=zie.getName();
				isDir=zie.isDirectory();
				if (isDir) { NumDirs++; } else { NumFiles++;}
			//	t.append(zfilename+"\n");
			}
		
			fis.close();
			t.append("Found "+NumFiles+" files and "+NumDirs+" Directories.\n");
			t.append("Done.\n");
	}
catch (Exception e)	{ t.append("Error Opening "+e.getMessage()+".\n"); } ;
}

void list_zip() { 
		  t.append("Listing "+filename+"...\n");
		  try {
			FileInputStream fis= new FileInputStream(in_dir+"\\"+filename);
			ZipInputStream zpis=new ZipInputStream(fis);
		
			ZipEntry zie;
			String zfilename;
			long filesize;

			while ( ( zie=zpis.getNextEntry() ) != null)
			{
				zfilename=zie.getName();
				t.append(zfilename+"\n");
			}
		
			fis.close();
	}
catch (Exception e)	{ t.append("Error Listing "+e.getMessage()+".\n"); } ;
}


void extract_zip() {
		// out_dir=tf.getText();
		t.append("Using Output Directory of "+out_dir+".\n");
// Just make the directory - even it is already exists
		File Dir = new File(out_dir);
		Dir.mkdir();

		t.append("Extracting "+filename+"\n");		
try {
			FileInputStream fis= new FileInputStream(in_dir+"\\"+filename);
			ZipInputStream zpis=new ZipInputStream(fis);
		
			ZipEntry zie;
			String zfilename;
			long filesize;
			boolean isDir;
			while ( ( zie=zpis.getNextEntry() ) != null)
			{
				zfilename=zie.getName();
				isDir=zie.isDirectory();
				if (isDir) { 
						File f = new File(out_dir+"\\"+zfilename);
						f.mkdir();
				}
				else if (!(zfilename.equals("META-INF/MANIFEST.MF"))) {
						byte[] buffer=new byte[4096];
						int bytes_read;
						try {
							FileOutputStream fos= new FileOutputStream(out_dir+"\\"+zfilename);
							while ( ( bytes_read=zpis.read(buffer) ) != -1)
							{
								fos.write(buffer,0,bytes_read);
							}
							fos.close();
						}
						catch(Exception e) { t.append("Error Extracting to "+e.getMessage()+" - unzip aborted\n"); } ;
				      }						
			}	
			fis.close();
			t.append("Done.\n");
	}
catch (Exception e)	{ t.append("Error Extracting "+e.getMessage()+" - unzip aborted\n"); } ;
}
	
	
	
void close() { System.exit(0); } ;
}