/* Copyright (2007) Schibsted Søk AS

  * This file is part of SESAT.

  *

  *   SESAT is free software: you can redistribute it and/or modify

  *   it under the terms of the GNU Affero General Public License as published by

  *   the Free Software Foundation, either version 3 of the License, or

  *   (at your option) any later version.

  *

  *   SESAT 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 Affero General Public License for more details.

  *

  *   You should have received a copy of the GNU Affero General Public License

  *   along with SESAT.  If not, see <http://www.gnu.org/licenses/>.

  */

 package no.sesat.search.util;

 import java.security.MessageDigest;

 import java.security.NoSuchAlgorithmException;

 import java.util.UUID;

 import javax.servlet.http.Cookie;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.commons.codec.binary.Hex;

 /**

  * <b> Must be threadsafe </b>

  *

  * @version <tt>$Id$</tt>

  */

 public final class TradeDoubler {

     private final static String secretCode = "997";

     private final static String organization = "1064392";

     private final static String event = "46757";

     private final HttpServletRequest request;

     public TradeDoubler(HttpServletRequest request) {

         this.request = request;

     }

     public String getChecksum(

             final String orderNumber,

             final String orderValue) throws RuntimeException {

         MessageDigest digest = null;

         try {

             digest = MessageDigest.getInstance("MD5");

         } catch(NoSuchAlgorithmException e) {

             throw new RuntimeException(e.getMessage());

         }

         final String s = new String(TradeDoubler.getSecretCode() + orderNumber + orderValue);

         digest.update(s.getBytes());

         return new String(Hex.encodeHex(digest.digest()));

     }

     public String getUUID() {

         return UUID.randomUUID().toString();

     }

     public static String getEvent() {

         return event;

     }

     public static String getOrganization() {

         return organization;

     }

     public static String getSecretCode() {

         return secretCode;

     }

     public String getCookieTDUID() {

         return getCookie("TRADEDOUBLER");

     }

     public String getCookieOrderNumber(){

         return getCookie("TRADEDOUBLER-onr");

     }

     public String getCookieChecksum(){

         return getCookie("TRADEDOUBLER-cs");

     }

     public String getCookieReportInfo(){

         return getCookie("TRADEDOUBLER-ri");

     }

     private String getCookie(String name){

         if (this.request == null){

             return "";

         }

         String value = "";

         final Cookie[] cookies = this.request.getCookies();

         if (cookies != null){

             for (int i = 0; i < cookies.length; i++) {

                 if (cookies[i].getName().equals(name)) {

                     if (cookies[i].getValue() != null) {

                         value = cookies[i].getValue();

                     }

                 }

             }

         }

         return value;

     }

 }