package org.apache.maven.plugins.shade.resource;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.io.OutputStreamWriter;

 import java.io.PrintWriter;

 import java.io.Writer;

 import java.text.SimpleDateFormat;

 import java.util.Date;

 import java.util.Iterator;

 import java.util.LinkedHashMap;

 import java.util.LinkedHashSet;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 import java.util.TreeSet;

 import java.util.jar.JarEntry;

 import java.util.jar.JarOutputStream;

 import org.codehaus.plexus.util.StringUtils;

 /**

  * Merges <code>META-INF/NOTICE.TXT</code> files.

  */

 public class ApacheNoticeResourceTransformer

     implements ResourceTransformer

 {

     Set entries = new LinkedHashSet();

     Map organizationEntries = new LinkedHashMap();

     String projectName = ""; // MSHADE-101 :: NullPointerException when projectName is missing

     boolean addHeader = true;

     String preamble1 =

           "// ------------------------------------------------------------------\n"

         + "// NOTICE file corresponding to the section 4d of The Apache License,\n"

         + "// Version 2.0, in this case for ";

     String preamble2 = "\n// ------------------------------------------------------------------\n";

     String preamble3 = "This product includes software developed at\n";

     //defaults overridable via config in pom

     String organizationName = "The Apache Software Foundation";

     String organizationURL = "http://www.apache.org/";

     String inceptionYear = "2006";

     String copyright;

     /**

      * The file encoding of the <code>NOTICE</code> file.

      */

     String encoding;

     private static final String NOTICE_PATH = "META-INF/NOTICE";

     private static final String NOTICE_TXT_PATH = "META-INF/NOTICE.txt";

     public boolean canTransformResource( String resource )

     {

         if ( NOTICE_PATH.equalsIgnoreCase( resource ) || NOTICE_TXT_PATH.equalsIgnoreCase( resource ) )

         {

             return true;

         }

         return false;

     }

     public void processResource( String resource, InputStream is, List relocators )

         throws IOException

     {

         if ( entries.isEmpty() )

         {

             String year = new SimpleDateFormat( "yyyy" ).format( new Date() );

             if ( !inceptionYear.equals( year ) )

             {

                 year = inceptionYear + "-" + year;

             }

             //add headers

             if ( addHeader ) 

             {

                 entries.add( preamble1 + projectName + preamble2 );

             }

             else

             {

                 entries.add( "" );

             }

             //fake second entry, we'll look for a real one later

             entries.add( projectName + "\nCopyright " + year + " " + organizationName + "\n" );

             entries.add( preamble3 + organizationName + " (" + organizationURL + ").\n" );

         }

         BufferedReader reader;

         if ( StringUtils.isNotEmpty( encoding ) )

         {

             reader = new BufferedReader( new InputStreamReader( is, encoding ) );

         }

         else

         {

             reader = new BufferedReader( new InputStreamReader( is ) );

         }

         String line = reader.readLine();

         StringBuffer sb = new StringBuffer();

         Set currentOrg = null;

         int lineCount = 0;

         while ( line != null )

         {

             String trimedLine = line.trim();

             if ( !trimedLine.startsWith( "//" ) )

             {

                 if ( trimedLine.length() > 0 )

                 {

                     if ( trimedLine.startsWith( "- " ) )

                     {

                         //resource-bundle 1.3 mode

                         if ( lineCount == 1

                             && sb.toString().indexOf( "This product includes/uses software(s) developed by" ) != -1 )

                         {

                             currentOrg = (Set) organizationEntries.get( sb.toString().trim() );

                             if ( currentOrg == null )

                             {

                                 currentOrg = new TreeSet();

                                 organizationEntries.put( sb.toString().trim(), currentOrg );

                             }

                             sb = new StringBuffer();

                         }

                         else if ( sb.length() > 0 && currentOrg != null )

                         {

                             currentOrg.add( sb.toString() );

                             sb = new StringBuffer();

                         }

                     }

                     sb.append( line ).append( "\n" );

                     lineCount++;

                 }

                 else

                 {

                     String ent = sb.toString();

                     if ( ent.startsWith( projectName )

                         && ent.indexOf( "Copyright " ) != -1 )

                     {

                         copyright = ent;

                     }

                     if ( currentOrg == null )

                     {

                         entries.add( ent );

                     }

                     else

                     {

                         currentOrg.add( ent );

                     }

                     sb = new StringBuffer();

                     lineCount = 0;

                     currentOrg = null;

                 }

             }

             line = reader.readLine();

         }

         if ( sb.length() > 0 ) 

         {

             if ( currentOrg == null )

             {

                 entries.add( sb.toString() );

             }

             else

             {

                 currentOrg.add( sb.toString() );

             }

         }

     }

     public boolean hasTransformedResource()

     {

         return true;

     }

     public void modifyOutputStream( JarOutputStream jos )

         throws IOException

     {

         jos.putNextEntry( new JarEntry( NOTICE_PATH ) );

         Writer pow;

         if ( StringUtils.isNotEmpty( encoding ) )

         {

             pow = new OutputStreamWriter( jos, encoding );

         }

         else

         {

             pow = new OutputStreamWriter( jos );

         }

         PrintWriter writer = new PrintWriter( pow );

         int count = 0;

         for ( Iterator itr = entries.iterator() ; itr.hasNext() ; )

         {

             ++count;

             String line = (String) itr.next();

             if ( line.equals( copyright ) && count != 2 )

             {

                 continue;

             }

             if ( count == 2 && copyright != null )

             {

                 writer.print( copyright );

                 writer.print( '\n' );

             }

             else

             {

                 writer.print( line );

                 writer.print( '\n' );

             }

             if ( count == 3 )

             {

                 //do org stuff

                 for ( Iterator oit = organizationEntries.entrySet().iterator(); oit.hasNext(); )

                 {

                     Map.Entry entry = (Map.Entry) oit.next();

                     writer.print( entry.getKey().toString() );

                     writer.print( '\n' );

                     Set entrySet = (Set) entry.getValue();

                     for ( Iterator eit = entrySet.iterator(); eit.hasNext(); )

                     {

                         writer.print( eit.next().toString() );

                     }

                     writer.print( '\n' );

                 }

             }

         }

         writer.flush();

         entries.clear();

     }

 }