package org.apache.maven.archetype.ui.generation;

 /*

  * 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 org.apache.commons.lang.StringUtils;

 import org.apache.maven.archetype.catalog.Archetype;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.LinkedHashMap;

 import java.util.List;

 import java.util.Map;

 /**

  * @author Olivier Lamy

  * @since 2.1

  */

 public class ArchetypeSelectorUtils

 {

     private ArchetypeSelectorUtils()

     {

         // no constructor for utility class

     }

     private static String extractGroupIdFromFilter( String filter )

     {

         return StringUtils.contains( filter, ':' ) ? StringUtils.substringBefore( filter, ":" ) : null;

     }

     private static String extractArtifactIdFromFilter( String filter )

     {

         // if no : the full text is considered as artifactId content

         return StringUtils.contains( filter, ':' ) ? StringUtils.substringAfter( filter, ":" ) : filter;

     }

     /**

      * apply some filtering on archetypes.

      * currently only on artifactId contains filter

      *

      * @param archetypesPerCatalog

      * @return

      */

     public static Map<String, List<Archetype>> getFilteredArchetypesByCatalog(

         Map<String, List<Archetype>> archetypesPerCatalog, String filter )

     {

         if ( archetypesPerCatalog == null || archetypesPerCatalog.isEmpty() )

         {

             return Collections.emptyMap();

         }

         Map<String, List<Archetype>> filtered =

             new LinkedHashMap<String, List<Archetype>>( archetypesPerCatalog.size() );

         for ( Map.Entry<String, List<Archetype>> entry : archetypesPerCatalog.entrySet() )

         {

             List<Archetype> archetypes = new ArrayList<Archetype>();

             for ( Archetype archetype : entry.getValue() )

             {

                 String groupId = ArchetypeSelectorUtils.extractGroupIdFromFilter( filter );

                 String artifactId = ArchetypeSelectorUtils.extractArtifactIdFromFilter( filter );

                 if ( ( ( groupId == null ) || StringUtils.contains( archetype.getGroupId(), groupId ) )

                     && StringUtils.contains( archetype.getArtifactId(), artifactId ) )

                 {

                     archetypes.add( archetype );

                 }

             }

             if ( !archetypes.isEmpty() )

             {

                 filtered.put( entry.getKey(), archetypes );

             }

         }

         return filtered;

     }

 }