/* Copyright (2005-2007) 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.result;

 import java.util.StringTokenizer;

 import no.sesat.search.site.Site;

 import no.sesat.search.site.config.SiteConfiguration;

 import org.apache.log4j.Logger;

 /**

  * Boomerang manipulates URL links, for example to ensure outbound links are logged.

  *

  * <b> Immutable. </b>

  *

  *

  *

  * @version $Id: Boomerang.java 6596 2008-05-10 10:05:48Z ssmiweve $

  */

 public final class Boomerang {

     // Constants -----------------------------------------------------

     private static final Logger LOG = Logger.getLogger(Boomerang.class);

     private static final String BASE_URL = "boomerang/";

     // Attributes ----------------------------------------------------

     // Static --------------------------------------------------------

     public static String getUrl(

             final Site site,

             final String orgUrl,

             final String paramString) {

         final StringBuilder toUrl = new StringBuilder("http://" + site.getName() + BASE_URL);

         // click attributes comes as a string seperated by ';'

         final StringTokenizer tokeniser = new StringTokenizer(paramString, ";");

         while(tokeniser.hasMoreTokens()){

             toUrl.append(tokeniser.nextToken().replace(':', '='));

             toUrl.append(';');

         }

         // remove last ';'

         toUrl.setLength(toUrl.length() - 1);

         toUrl.append('/');

         // add the destination url

         if(!orgUrl.startsWith("http")){

             // any relative url must be made absolute against the current skin

             toUrl.append("http://" + site.getName());

             // avoid double /

             if(orgUrl.startsWith("/")){

                 toUrl.setLength(toUrl.length() - 1);

             }

         }

         // append the original destination url

         toUrl.append(orgUrl);

         return toUrl.toString();

     }

     // Constructors -------------------------------------------------

     // Public --------------------------------------------------------

     // Package protected ---------------------------------------------

     // Protected -----------------------------------------------------

     // Private -------------------------------------------------------

     // Inner classes -------------------------------------------------

 }