package org.apache.maven.archetype.source;
   
   /*
    * 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.maven.archetype.catalog.Archetype;
  import org.apache.maven.archetype.catalog.ArchetypeCatalog;
  import org.apache.maven.artifact.manager.WagonManager;
  import org.apache.maven.wagon.Wagon;
  import org.apache.maven.wagon.WagonException;
  import org.apache.maven.wagon.authentication.AuthenticationInfo;
  import org.apache.maven.wagon.proxy.ProxyInfo;
  import org.apache.maven.wagon.repository.Repository;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.util.ReaderFactory;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Properties;
  
  /**
   * @author Jason van Zyl
   */
  @Component( role = ArchetypeDataSource.class, hint = "remote-catalog" )
  public class RemoteCatalogArchetypeDataSource
      extends CatalogArchetypeDataSource
  {
      @Requirement
      private WagonManager wagonManager;
  
      public static final String REPOSITORY_PROPERTY = "repository";
  
      /**
       * Id of the repository used to download catalog file. Proxy or authentication info can
       * be setup in settings.xml.
       */
      public static final String REPOSITORY_ID = "archetype";
  
      public ArchetypeCatalog getArchetypeCatalog( Properties properties )
          throws ArchetypeDataSourceException
      {
          String repository = properties.getProperty( REPOSITORY_PROPERTY );
  
          if ( repository == null )
          {
              throw new ArchetypeDataSourceException( "To use the remote catalog you must specify the 'repository'"
                  + " property with an URL." );
          }
  
          if ( repository.endsWith( "/" ) )
          {
              repository = repository.substring( 0, repository.length() - 1 );
          }
  
          try
          {
              return downloadCatalog( repository, ARCHETYPE_CATALOG_FILENAME );
          }
          catch ( ArchetypeDataSourceException e )
          {
              throw e;
          }
          catch ( Exception e )
          { // When the default archetype catalog name doesn't work, we assume the repository is the URL to a file
              String repositoryPath = repository.substring( 0, repository.lastIndexOf( "/" ) );
              String filename = repository.substring( repository.lastIndexOf( "/" ) + 1 );
  
              try
              {
                  return downloadCatalog( repositoryPath, filename );
              }
              catch ( Exception ex )
              {
                  getLogger().warn( "Error reading archetype catalog " + repository, ex );
                  return new ArchetypeCatalog();
              }
          }
      }
  
      public void updateCatalog( Properties properties, Archetype archetype )
          throws ArchetypeDataSourceException
      {
         throw new ArchetypeDataSourceException( "Not supported yet." );
     }
 
     private ArchetypeCatalog downloadCatalog( String repositoryPath, String filename )
         throws WagonException, IOException, ArchetypeDataSourceException
     {
         getLogger().debug( "Searching for remote catalog: " + repositoryPath + "/" + filename );
 
         // We use wagon to take advantage of a Proxy that has already been setup in a Maven environment.
         Repository wagonRepository = new Repository( REPOSITORY_ID, repositoryPath );
         AuthenticationInfo authInfo = wagonManager.getAuthenticationInfo( wagonRepository.getId() );
         ProxyInfo proxyInfo = wagonManager.getProxy( wagonRepository.getProtocol() );
 
         Wagon wagon = wagonManager.getWagon( wagonRepository );
 
         File catalog = File.createTempFile( "archetype-catalog", ".xml" );
         try
         {
             wagon.connect( wagonRepository, authInfo, proxyInfo );
             wagon.get( filename, catalog );
 
             return readCatalog( ReaderFactory.newXmlReader( catalog ) );
         }
         finally
         {
             disconnectWagon( wagon );
             catalog.delete();
         }
     }
 
     private void disconnectWagon( Wagon wagon )
     {
         try
         {
             wagon.disconnect();
         }
         catch ( Exception e )
         {
             getLogger().warn( "Problem disconnecting from wagon - ignoring: " + e.getMessage() );
         }
     }
 
 }