//
// RemoteCounter.java
// version 961114
// copyright 1996 by bo larsson
// all rights reserved
//
// bugs or feedback to bliss@seagull.net
//

// include all the java packages that are needed.
import java.awt.*;
import java.net.*;
import java.io.*;
import java.applet.*;

// 
// The RemoteCounter applet connects to a cgi script on
// the host. It expects data back in the form of a string 
// representing the number of times the script has been
// executed. It can take two parameters:
//
//   Dummy - some text that you want to show instead of the count.
//   PageId - the numeric id of the page to be counted.
//
public class RemoteCounter extends Applet {

  String count;
  int numberOfBytes;

  public void init() {

    String ret;
    byte bcount[] = new byte[20];

    // handle the dummy parameter.
    if ((ret = getParameter("Dummy")) != null) {
      count = ret;

      // do the connection and retrieve data
    } else {
      // in a try block to catch exceptions during connection.
      try {
	int tmp;
	// build the string.
	String connectString = 
	  new String("http://www.seagull.net/bliss/cgi/jcounter/gscntr.pl?A=");
	String idParam;
	URL counterScript;
	// deal with the pageId argument if any.
	if ((idParam = getParameter("PageId")) != null) {
	  counterScript = new URL(connectString.concat(idParam));
	} else {
	  counterScript = new URL(connectString);
	}
	// open the connection specified by the given URL
	counterScript.openConnection();
	// open an input stream off the same URL.
	InputStream counterStream = counterScript.openStream();
	// read input.
	while ((tmp = counterStream.read()) != -1 && numberOfBytes < 20) {
	  bcount[numberOfBytes] = (byte)tmp;
	  numberOfBytes++;
	}
	count = new String(bcount, 0, 0, numberOfBytes);
      } catch (Exception e) {
	System.exit(-1);
      }
    }

  }
  
  // paint the bytes retrieved in white on red.
  public void paint(Graphics g) {

    int cx, cy;
    // center horizontally.
    cx = (size().width - g.getFontMetrics().stringWidth(count)) /2 ;
    // center vertically. The x y values for drawString refer to
    // the BOTTOM of the font, so compensate by adding the height
    // instead of subtracting.
    cy = (size().height + g.getFontMetrics().getHeight()) /2 ;

    g.setColor(Color.red);
    g.fillRect(0, 0, size().width, size().height);

    g.setColor(Color.white);
    g.drawString(count, cx, cy);
  }
}