ServerCom.java

/*	
	Copyright 2012 Jan Ove Saltvedt
	
	This file is part of KBot.

    KBot 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 3 of the License, or
    (at your option) any later version.

    KBot 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 KBot.  If not, see <http://www.gnu.org/licenses/>.
	
*/



package com.kbotpro.servercom;

import com.kbotpro.handlers.AccountsManager;
import com.kbotpro.utils.ProgressCallback;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Class that takes care of communication with the server.
 * Also send pings to the server to indicate the bot is alive and the session should not be closed.
 */
public abstract class ServerCom {
    
    /**
     * Sends login data to server for verification.
     * @return returns a xml string containing response.
     */
    public abstract Object[] login();

    public abstract String getAccountsInternal();

    public abstract boolean setSettingServerSide(String name, String value);

    public abstract void getSettings();


    private boolean outdatedOpen = false;


    public abstract String getScriptList();

    public abstract byte[] downloadScript(int id, ProgressCallback progressCallback);

    public abstract boolean addAccount(AccountsManager.Account account);

    public abstract boolean deleteAccount(AccountsManager.Account account);

    public static String SHA1(String text)
            throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md;
        md = MessageDigest.getInstance("SHA-1");
        byte[] sha1hash;
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        sha1hash = md.digest();
        return convertToHex(sha1hash);
    }

    public static String MD5(String text)
            throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md;
        md = MessageDigest.getInstance("MD5");
        byte[] sha1hash;
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        sha1hash = md.digest();
        return convertToHex(sha1hash);
    }

    public static byte[] MD5Bytes(String text)
            throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md;
        md = MessageDigest.getInstance("MD5");
        byte[] sha1hash;
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        sha1hash = md.digest();
        return sha1hash;
    }

    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
        	int halfbyte = (data[i] >>> 4) & 0x0F;
        	int two_halfs = 0;
        	do {
	            if ((0 <= halfbyte) && (halfbyte <= 9))
	                buf.append((char) ('0' + halfbyte));
	            else
	            	buf.append((char) ('a' + (halfbyte - 10)));
	            halfbyte = data[i] & 0x0F;
        	} while(two_halfs++ < 1);
        }
        return buf.toString();
    }

    public abstract void startServerPinger();
}