/** *****************************************************************
    ChooseAbs.java   ICECCS 2001 Abstract choice

        @author Jeff Offutt

        @version 3.0    (01/26/01)

This version expects the to address to be sent over as a parameter
from the HTML.  It's stored in a hidden field in the HTML file.
This is more flexible: the addressee can be controlled from the
server side.

********************************************************************* */
// Import Servlet Libraries
import javax.servlet.*;
import javax.servlet.http.*;

// Import Java Libraries
import java.io.*;
import java.util.*;
import java.lang.*;

// Import SMTP Class
import sun.net.smtp.SmtpClient;

// ChooseAbs class
//
// CONSTRUCTOR: no constructor specified (default)
//
// ****************  PUBLIC OPERATIONS  *********************************
// void doPost ()    --> Main method for gathering data and sending email
// void doGet ()     --> Not implemented.
// void getParameters() --> Copies data into a StringBuffer.
//                          Puts in global String message
// boolean SendMail ()  --> Sends the message through email
// void PrintHead () --> Prints the head of an HTML page
//***********************************************************************
//
// The possible IOException on the PrintWriter is thrown up.

public class ChooseAbs extends HttpServlet
{

String msgFrom, msgTo, msgSubject;

/** *****************************************************
 *  Overrides HttpServlet's doPost().
********************************************************* */
public void doPost (HttpServletRequest req, HttpServletResponse res)
   throws ServletException, IOException
{
   String message;
   res.setContentType ("TEXT/HTML");
   PrintWriter out = res.getWriter ();

   message = getParameters (req);

   PrintHead (out);

   if (!sendMail (message))
   {
      out.println ("An error occurred while attempting to access the mail server.");
      return;
   }

   // Send ack
   out.println ("Your selections have been submitted.<BR>");
   out.println ("Thank you!<BR><BR>");
   out.println ("Sten and Jeff");

   out.println ("</BODY>");
   out.println ("</HTML>");
   out.close ();
}

/** *****************************************************
 *  Gets the parameters.
 *  Puts them in a string buffer.
********************************************************* */
private String getParameters (HttpServletRequest req)
   throws ServletException, IOException
{
   StringBuffer tempStringBuffer = new StringBuffer (1024);

   msgSubject = "Abstract review choices";
   // msgTo = "offutt@ise.gmu.edu"; // testing
   // msgTo = "offutt@ise.gmu.edu,sten.andler@ida.his.se"; // original
   // Who gets the data is a hidden field in the HTML.
   msgTo   = req.getParameter ("MAILTO");
   msgFrom = req.getParameter ("EMAIL");

   tempStringBuffer.append ("From:: ");
   tempStringBuffer.append (req.getParameter ("NAME"));
   tempStringBuffer.append ("\n");
   tempStringBuffer.append ("      ");
   tempStringBuffer.append (req.getParameter ("EMAIL"));
   tempStringBuffer.append ("\n\n");

   //I am not sure how to get the check boxes ...
   tempStringBuffer.append ("Choices: ");
   tempStringBuffer.append (req.getParameter ("review"));
   tempStringBuffer.append ("\n\n");
   tempStringBuffer.append ("Conflicts: ");
   tempStringBuffer.append (req.getParameter ("conflict"));

   //message = tempStringBuffer.toString();
   return (tempStringBuffer.toString());
}

/** *****************************************************
 *  Sends the information through email.
********************************************************* */
private boolean sendMail (String Mes)
{
   PrintStream out;
   SmtpClient send;

   try
   {
      send = new SmtpClient ("ise.gmu.edu");
      send.from (msgFrom);
      send.to (msgTo);
      out = send.startMessage ();

      out.println ("From: " + msgFrom);
      out.println ("To: " + msgTo);
      out.println ("Subject: " + msgSubject);

      out.println ("\n----------------------------------\n");

      out.println (Mes);
      out.println ("\r\n");
      out.println ("\n----------------------------------");

      out.flush ();
      out.close ();
      send.closeServer();
   }
   catch (IOException e)
   {
      log ("Error occurred while sending mail", e);
      return false;
   }
   return true;
}

/** *****************************************************
 *  Prints the head of the HTML page, without the form.
********************************************************* */
private void PrintHead (PrintWriter out)
   throws IOException
{
   out.println ("<HTML>");
   out.println ("<HEAD>");
   out.println (" <TITLE>ICECCS 2001: Abstracts Ack</TITLE>");

   out.println ("</HEAD>");
   out.println ("<BODY>");
   out.println ("<CENTER><H2>ICECCS 2001: Abstracts Acknowledgement</H2></CENTER>");
   out.println ("<HR>");
}

} // End ChooseAbs