/////////////////////////////////////////////////////////
// Module		ClientSearch.java
// Version		2.0
// Language		Java
// Author		Sudhakar Chandrasekaran (thaths@netscape.com)
// History
// 05/17/97		Housekeeping - cleaned up
// 05/16/97		Implemted JavaWorld article's crawler
//				Removed the old page-description pairs
//				Added code to search CD-ROM
// 05/14/97		Plan to fix performance issues
// 04/21/97		Fixed parsing problem with getDocumentBase
// 04/20/97		Long promised improvements put in.  Have not optimized yet
//				AND/OR/string searches implemented
//				Case sesitivity added
//				Help added
// 12/03/97		Am attempting dramatic improvements long promised.  Added
//				options panel (GUI) for case sensitive searches and bolean
//				seraches
// 12/01/97		Added MenuBar and menu items.  Still experimental.  Changed 
//				Copyright to GNU General Public License.
// 11/21/96		Added ability to search (theoretically) any number of pages,
//				a primitive HTML parser and bug fixes
// 11/05/96		Added code to pop up a seperate window
// 11/02/96		Added multithreading for the process of searching
//
// Legalese                
// Copyright (C) 1996-1997 Sudhakar Chandrasekharan  
//
// This program is free software;  you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the 
// Free Software Foundation; either version 2 of the license, or (at your 
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but 
// WITHOUT ANY WARRANTY; without even the implied warranty of 
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
// General Public License for more details.  Writers of free software 
// cannot afford getting sued!
// 
// You should have received a copy  of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc., 
// 675 Mass Ave., Cambridge, MA 02139, USA.
//
// Sudhakar "Thaths" Chandrasekharan, 20 Apr 1997.
////////////////////////////////////////////////////////

// First import the standard classes we need
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.*;
import java.io.DataInputStream;
import java.io.FilterInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.Hashtable;


// Import all the custom classes that we need 
import MyFrame;

public class ClientSearch extends Applet 
{
	// Data members
	MyFrame myFrame;
	String topPage;		// Top most page to which to send the crawler
	String server;		// Document base 
	boolean isLocal;	// Flag to indicate CD-ROM style searching
	String openingPage;
	Hashtable pageDB = new Hashtable();
	int totalPages;

	int wid, heig;	// Width and height of the pop-up window 
	
	// Mommy!  I want my momeee!
	Component f = getParent();

	// Initialize the search engine
	public void init()
	{
		System.out.println("ClientSearch: Loaded.  Initializing ...");
		
		// Find the applet's frame
		while (f!= null) {
			f = f.getParent();
		}

		// Get the PARAMs for the applet
		getParameters();

		// The cralwler would start here
		openingPage = new String(server + topPage);

		setLayout(new FlowLayout(FlowLayout.CENTER));

		Button b = new Button("Open Search Engine");
		add(b);
		validate();
		System.gc();
		System.out.println("ClientSearch: Initialized. Running ...");
	}

	public void getParameters()
	{
		// Get the parameters from APPLET tag.  
		// If a parameter is not specified
		// in the applet tag then set it to a default value
		
		// How many pages must an applet search
		// before you can call it an applet ;-)
		String num = getParameter("totalPages");
		if (num == null) {
//			searchQueue.ensureCapacity(10);
			totalPages = 30;		// Default
		} else {
//			System.out.println("Total Pages is = " + Integer.parseInt(num));
			totalPages = Integer.parseInt(num);
		}
			
		// Find out if the top page has been specified
		if ((topPage = getParameter("topPage")) == null) {
			System.err.println("ClientSearch: Unrecoverable Error!  No top page specified.  Applet cannot run");
		} 

		// Find out if CD-ROM style search is specified
		String locl = getParameter("isLocal");
		if (locl == null) {
			// Not a CD-ROM style search.  Must get a server
			// PARAMeter
			if ((server = getParameter("server")) == null) {
				System.err.println("ClientSearch: Unrecoverable Error!  No server specified.  Applet cannot run");
			}
			isLocal = false;
		} else {
			// CD-ROM style search.  Construct a 'server'
			// from documentBase
			isLocal = true;
			String docBase = this.getDocumentBase().toString();
			int endIndex = docBase.lastIndexOf("/");
			server = new String(docBase.substring(0,endIndex) + "/");
		}


		// Get the width of the pop-up window
		String w = getParameter("wid");
		if (w == null) {
			wid = 450;		// Default
		} else {
			wid = Integer.parseInt(w);
		}

		// Get the height of the pop-up window
		String h = getParameter("heig");
		if (h == null) {
			heig = 450;		// Default
		} else {
			heig = Integer.parseInt(h);
		}
	
		// Get the font
		String fnt = getParameter("font");
		if (fnt == null) {
			fnt= "TimesRoman";	// Default
		}
		
		// Get the font size
		int fontSize;
		String fs = getParameter("fontsize");
		if (fs == null) {
			fontSize = 10;		// Default
		} else {
			fontSize = Integer.parseInt(fs);
		}
	
		// Set the painting font to the specified value
		setFont(new Font(fnt, Font.PLAIN, fontSize));
	
		// Get the background color
		String bg = getParameter("bgcolor");
		if (bg == null) {
			setBackground(new Color(255,255,255));	// Default - white
		} else {
			// Parse out the RGB values
			StringTokenizer st = new StringTokenizer(bg, ",");	
			String red = new String(st.nextToken());
			String green = new String(st.nextToken());
			String blue = new String(st.nextToken());
			setBackground(new Color(Integer.parseInt(red), Integer.parseInt(green), Integer.parseInt(blue)));
		}
		
		// Get the foreground color
		String fg = getParameter("fgcolor");
		if (fg == null) {
			setForeground(new Color(0,0,0));	// Default - black
		} else {
			// Parse out the RGB values
			StringTokenizer st = new StringTokenizer(fg, ",");	
			String red = new String(st.nextToken());
			String green = new String(st.nextToken());
			String blue = new String(st.nextToken());
			setForeground(new Color(Integer.parseInt(red), Integer.parseInt(green), Integer.parseInt(blue)));
		}
	}

	// Event Handler
	// When button is clicked
	// pop-up myFrame
	public boolean action(Event e, Object o)
	{
		// Button has been clicked.  Open the search window
		myFrame = new MyFrame(this, (Frame)f, "ClientSearch v2.0");
		myFrame.resize(wid,heig);
		myFrame.show();

		return true;
	}

	public void start()
	{
//		myFrame.show();
	}

	public void stop()
	{
//		myFrame.hide();
	}

	// It's all over!
	public void destroy()
	{
		if (myFrame != null) {
			System.out.println("ClientSearch: Goodbye cruel world, it's over!");
			myFrame.dispose();
			myFrame = null;
		}
	}
}