package org.apache.maven.report.projectinfo;
   
   /*
    * 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.IOException;
  import java.io.InputStream;
  import java.net.Authenticator;
  import java.net.PasswordAuthentication;
  import java.net.URL;
  import java.util.Collections;
  import java.util.List;
  import java.util.Properties;
  
  import org.apache.commons.validator.UrlValidator;
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.ArtifactUtils;
  import org.apache.maven.artifact.factory.ArtifactFactory;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.MavenProjectBuilder;
  import org.apache.maven.project.ProjectBuildingException;
  import org.apache.maven.settings.Proxy;
  import org.apache.maven.settings.Settings;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * Utilities methods.
   *
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   * @version $Id: ProjectInfoReportUtils.java 817018 2009-09-20 12:30:57Z olamy $
   * @since 2.1
   */
  public class ProjectInfoReportUtils
  {
      private static final UrlValidator URL_VALIDATOR = new UrlValidator( new String[] { "http", "https" } );
  
      /**
       * Get the input stream using ISO-8859-1 as charset from an URL.
       *
       * @param url not null
       * @param settings not null to handle proxy settings
       * @return the ISO-8859-1 inputstream found.
       * @throws IOException if any
       * @see #getInputStream(URL, Settings, String)
       */
      public static String getInputStream( URL url, Settings settings )
          throws IOException
      {
          return getInputStream( url, settings, "ISO-8859-1" );
      }
  
      /**
       * Get the input stream from an URL.
       *
       * @param url not null
       * @param settings not null to handle proxy settings
       * @param encoding the wanted encoding for the inputstream. If null, encoding will be "ISO-8859-1".
       * @return the inputstream found depending the wanted encoding.
       * @throws IOException if any
       */
      public static String getInputStream( URL url, Settings settings, String encoding )
          throws IOException
      {
          String scheme = url.getProtocol();
          if ( !"file".equals( scheme ) )
          {
              Proxy proxy = settings.getActiveProxy();
              if ( proxy != null )
              {
                  if ( "http".equals( scheme ) || "https".equals( scheme ) )
                  {
                      scheme = "http.";
                  }
                  else if ( "ftp".equals( scheme ) )
                  {
                      scheme = "ftp.";
                  }
                  else
                  {
                      scheme = "";
                  }
 
                 String host = proxy.getHost();
                 if ( !StringUtils.isEmpty( host ) )
                 {
                     Properties p = System.getProperties();
                     p.setProperty( scheme + "proxySet", "true" );
                     p.setProperty( scheme + "proxyHost", host );
                     p.setProperty( scheme + "proxyPort", String.valueOf( proxy.getPort() ) );
                     if ( !StringUtils.isEmpty( proxy.getNonProxyHosts() ) )
                     {
                         p.setProperty( scheme + "nonProxyHosts", proxy.getNonProxyHosts() );
                     }
 
                     final String userName = proxy.getUsername();
                     if ( !StringUtils.isEmpty( userName ) )
                     {
                         final String pwd = StringUtils.isEmpty( proxy.getPassword() ) ? "" : proxy.getPassword();
                         Authenticator.setDefault( new Authenticator()
                         {
                             /** {@inheritDoc} */
                             protected PasswordAuthentication getPasswordAuthentication()
                             {
                                 return new PasswordAuthentication( userName, pwd.toCharArray() );
                             }
                         } );
                     }
                 }
             }
         }
 
         InputStream in = null;
         try
         {
             in = url.openStream();
 
             if ( encoding == null )
             {
                 return IOUtil.toString( in, "ISO-8859-1" );
             }
             return IOUtil.toString( in, encoding );
         }
         finally
         {
             IOUtil.close( in );
         }
     }
 
     /**
      * @param factory not null
      * @param artifact not null
      * @param mavenProjectBuilder not null
      * @param remoteRepositories not null
      * @param localRepository not null
      * @return the artifact url or null if an error occurred.
      */
     public static String getArtifactUrl( ArtifactFactory factory, Artifact artifact,
                                          MavenProjectBuilder mavenProjectBuilder, List remoteRepositories,
                                          ArtifactRepository localRepository )
     {
         if ( Artifact.SCOPE_SYSTEM.equals( artifact.getScope() ) )
         {
             return null;
         }
 
         Artifact copyArtifact = ArtifactUtils.copyArtifact( artifact );
         if ( !"pom".equals( copyArtifact.getType() ) )
         {
             copyArtifact = factory.createProjectArtifact( copyArtifact.getGroupId(), copyArtifact.getArtifactId(),
                                                              copyArtifact.getVersion(), copyArtifact.getScope() );
         }
         try
         {
             MavenProject pluginProject =
                 mavenProjectBuilder.buildFromRepository( copyArtifact,
                                                          remoteRepositories == null ? Collections.EMPTY_LIST
                                                                          : remoteRepositories, localRepository );
 
             if ( isArtifactUrlValid( pluginProject.getUrl() ) )
             {
                 return pluginProject.getUrl();
             }
 
             return null;
         }
         catch ( ProjectBuildingException e )
         {
             return null;
         }
     }
 
     /**
      * @param artifactId not null
      * @param link could be null
      * @return the artifactId cell with or without a link pattern
      * @see AbstractMavenReportRenderer#linkPatternedText(String)
      */
     public static String getArtifactIdCell( String artifactId, String link )
     {
         if ( StringUtils.isEmpty( link ) )
         {
             return artifactId;
         }
 
         return "{" + artifactId + "," + link + "}";
     }
 
     /**
      * @param url not null
      * @return <code>true</code> if the url is valid, <code>false</code> otherwise.
      */
     public static boolean isArtifactUrlValid( String url )
     {
         if ( StringUtils.isEmpty( url ) )
         {
             return false;
         }
 
         return URL_VALIDATOR.isValid( url );
     }
 }