org.elite.jdcbot.util.GoogleCalculation.java Source code

Introduction

Here is the source code for org.elite.jdcbot.util.GoogleCalculation.java

Source

/*
 * GoogleCalculation.java
 *
 * Copyright (C) 2005 Kokanovic Branko
 *
 * 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 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.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package org.elite.jdcbot.util;

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URLEncoder;
import org.json.*;

import org.elite.jdcbot.framework.jDCBot;

/**
 * This class extends WebPageFetcher class and implements Runnable
 * It gets calculation string (e.g. 1+2*3) and returns result using google and WebPageFetcher
 * Reason for implementing Runnable is that it can gets stuck while WebPageFetcher finishes its work
 * Credits for idea goes to http://sourceforge.net/projects/phpdcbot !!!
 * 
 * @since 0.6
 * @author Milos Grbic, Kokanovic Branko
 * @version 0.6
 */
public class GoogleCalculation extends WebPageFetcher implements Runnable {

    private jDCBot _bot;
    private String user;

    public GoogleCalculation(jDCBot bot, String calc, String u) throws Exception {
        final String authUser = "pforpallav";
        final String authPassword = "buckmin$ter";
        Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                //logger.info(MessageFormat.format("Generating PasswordAuthentitcation for proxy authentication, using username={0} and password={1}.", username, password));
                return new PasswordAuthentication(authUser, authPassword.toCharArray());
            }
        });

        System.setProperty("http.proxyHost", "netmon.iitb.ac.in");
        System.setProperty("http.proxyPort", "80");
        System.setProperty("http.proxyUser", authUser);
        System.setProperty("http.proxyPassword", authPassword);

        String url = "http://www.google.com/ig/calculator?hl=en&q=";
        _bot = bot;
        user = u;
        calc = URLEncoder.encode(calc, "UTF-8");
        url = url + calc;
        SetURL(url);
    }

    private String GetCalculation() throws Exception {

        //retrieving page
        String returned = getPageContent();
        //extracting data from retrived page
        JSONObject j = new JSONObject(returned + "}");

        return j.getString("rhs");

        /*if (returned.contains(keyword1)==false) throw new Exception();
        String result=returned.substring(returned.indexOf(keyword1)+keyword1.length());
            
        if (result.contains(keyword2)==false) throw new Exception();
        result=result.substring(0,result.indexOf(keyword2));
        if ((result.length()==0) || (result.length()>1000)) throw new Exception();
            
        //replacing html stuff
            
        //replacing decimal dots
        Pattern pattern;
        Matcher matcher;
        pattern = Pattern.compile("<font size=-2> </font>");
        matcher = pattern.matcher(result);
        result = matcher.replaceAll(","); 
        //replacing x (example 2x10^9)
        pattern=Pattern.compile("&#215;");
        matcher=pattern.matcher(result);
        result=matcher.replaceAll("x");
        //replacing sup tags
        pattern=Pattern.compile("<sup>");
        matcher=pattern.matcher(result);
        result=matcher.replaceAll("^");
        pattern=Pattern.compile("</sup>");
        matcher=pattern.matcher(result);
        result=matcher.replaceAll("");
        return result;*/
    }

    public void run() {

        try {
            String res = this.GetCalculation();
            _bot.SendPublicMessage("Result for user " + user + " : " + res);
        } catch (Exception e) {
            try {
                _bot.SendPublicMessage("Result for user " + user + " : " + "Sorry, I can't calculate this:/");
            } catch (Exception e1) {
                e1.printStackTrace();
            }
        }

    }
}