/*

  * Copyright (c) 2002-2015, Mairie de Paris

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  *

  *  1. Redistributions of source code must retain the above copyright notice

  *     and the following disclaimer.

  *

  *  2. Redistributions in binary form must reproduce the above copyright notice

  *     and the following disclaimer in the documentation and/or other materials

  *     provided with the distribution.

  *

  *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its

  *     contributors may be used to endorse or promote products derived from

  *     this software without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE

  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  * POSSIBILITY OF SUCH DAMAGE.

  *

  * License 1.0

  */

 package fr.paris.lutece.plugins.releaser.util.svn;

 import fr.paris.lutece.plugins.releaser.business.ReleaserUser;

 import fr.paris.lutece.plugins.releaser.util.ReleaserUtils;

 import fr.paris.lutece.portal.service.util.AppLogService;

 import fr.paris.lutece.portal.service.util.AppPropertiesService;

 import fr.paris.lutece.util.httpaccess.HttpAccess;

 import fr.paris.lutece.util.httpaccess.HttpAccessException;

 import fr.paris.lutece.util.signrequest.BasicAuthorizationAuthenticator;

 import fr.paris.lutece.util.signrequest.RequestAuthenticator;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Locale;

 import javax.servlet.http.HttpServletRequest;

 /**

  * SvnSiteService

  */

 public class SvnSiteService 

 {

     private static final String PROPERTY_SITE_REPOSITORY_LOGIN = "releaser.site.repository.login";

     private static final String PROPERTY_SITE_REPOSITORY_PASSWORD = "releaser.site.repository.password";

     /**

      * Fetch the pom.xml content from a repository

      * 

      * @param strPomUrl

      *            The POM URL

      * @return The POM content

      */

     public static String fetchPom( String strPomUrl,HttpServletRequest request,Locale locale )

     {

         try

         {

             RequestAuthenticator authenticator = getSiteAuthenticator( request,locale);

             HttpAccess httpAccess = new HttpAccess( );

             return httpAccess.doGet( strPomUrl, authenticator, null );

         }

         catch( HttpAccessException ex )

         {

             AppLogService.error( "Error fecthing pom.xml content : " + ex.getMessage( ), ex );

         }

         return null;

     }

     /**

      * Gets the last release found in the SVN repository

      * @param strSiteArtifactId The site artifact id

      * @param strTrunkUrl The trunk URL

      * @return The version if found otherwise null

      */

     public static String getLastRelease( String strSiteArtifactId , String strTrunkUrl,HttpServletRequest request,Locale locale )

     {

         String strTagsUrl = strTrunkUrl.replace( "trunk", "tags" );

         List<String> list = new ArrayList<>( );

         try

         {

             RequestAuthenticator authenticator = getSiteAuthenticator(request,locale );

             HttpAccess httpAccess = new HttpAccess( );

             String strHtml = httpAccess.doGet( strTagsUrl , authenticator , null );

             list = getAnchorsList( strHtml , strSiteArtifactId );

         }

         catch( HttpAccessException e )

         {

             AppLogService.error( "SvnSiteService : Error retrieving release version : " + e.getMessage( ), e );

         }

         return ( !list.isEmpty() ) ? list.get( list.size() - 1 ) : null;

     }

     /**

      * Gets anchor list using more optimized method

      *

      * @param strHtml

      *            The HTML code

      * @return The list

      */

     private static List<String> getAnchorsList( String strHtml , String strPrefix )

     {

         List<String> list = new ArrayList<String>( );

         String strCurrent = strHtml;

         int nPos = strCurrent.indexOf( "<a " );

         while ( nPos > 0 )

         {

             strCurrent = strCurrent.substring( nPos );

             int nEndTag = strCurrent.indexOf( '>' );

             int nTagEnd = strCurrent.indexOf( "</a>" );

             String strTag = strCurrent.substring( nEndTag + 1, nTagEnd ).replaceAll( "\\/", "" );

             if( strTag.startsWith( strPrefix ))

             {

                 list.add( strTag );

             }

             strCurrent = strCurrent.substring( nTagEnd + 4 );

             nPos = strCurrent.indexOf( "<a " );

         }

         return list;

     }

     /**

      * Build an authenticathor to access the site repository

      * 

      * @return The authenticator

      */

     private static RequestAuthenticator getSiteAuthenticator( HttpServletRequest request,Locale locale)

     {

         ReleaserUser user=ReleaserUtils.getReleaserUser( request, locale );

         String strLogin=null;

         String strPassword=null;

         if(user!=null)

         {

              strLogin=user.getSvnSiteAccountLogin( );

             strPassword=user.getSvnSiteAccountPassword( );

         }

         return new BasicAuthorizationAuthenticator( strLogin, strPassword );

     }

 }