package org.apache.maven.plugins.site;

 /*

  * 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.File;

 import java.io.IOException;

 import java.io.StringWriter;

 import java.io.Writer;

 import java.text.DateFormat;

 import java.text.SimpleDateFormat;

 import java.util.Date;

 import java.util.List;

 import java.util.Locale;

 import org.apache.maven.doxia.site.decoration.DecorationModel;

 import org.apache.maven.doxia.site.decoration.io.xpp3.DecorationXpp3Writer;

 import org.apache.maven.doxia.siterenderer.SiteRenderingContext;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.codehaus.plexus.util.IOUtil;

 import org.codehaus.plexus.util.StringUtils;

 import org.codehaus.plexus.util.WriterFactory;

 import org.codehaus.plexus.util.xml.PrettyPrintXMLWriter;

 import org.codehaus.plexus.util.xml.XMLWriter;

 import org.codehaus.plexus.util.xml.XmlWriterUtil;

 /**

  * Displays the effective site descriptor as an XML for this build, after inheritance and interpolation of

  * <code>site.xml</code>.

  *

  * @author <a href="mailto:hboutemy@apache.org">Hervé Boutemy</a>

  * @version $Id: org.apache.maven.plugins.site.EffectiveSiteMojo.html 816558 2012-05-08 12:00:46Z hboutemy $

  * @goal effective-site

  * @since 2.2

  */

 public class EffectiveSiteMojo

     extends AbstractSiteRenderingMojo

 {

     /**

      * Optional parameter to write the output of this help in a given file, instead of writing to the console.

      * <br/>

      * <b>Note</b>: Could be a relative path.

      *

      * @parameter expression="${output}"

      */

     protected File output;

     /**

      * {@inheritDoc}

      */

     public void execute()

         throws MojoExecutionException, MojoFailureException

     {

         String effectiveSite;

         try

         {

             List<Locale> localesList = siteTool.getAvailableLocales( locales );

             SiteRenderingContext context = createSiteRenderingContext( localesList.get( 0 ) );

             DecorationModel decorationModel = context.getDecoration();

             StringWriter w = new StringWriter();

             XMLWriter writer =

                 new PrettyPrintXMLWriter( w, StringUtils.repeat( " ", XmlWriterUtil.DEFAULT_INDENTATION_SIZE ),

                                           decorationModel.getModelEncoding(), null );

             writeHeader( writer );

             writeEffectiveSite( decorationModel, writer );

             effectiveSite = w.toString();

         }

         catch ( IOException e )

         {

             throw new MojoExecutionException( "Error during site descriptor calculation", e );

         }

         if ( output != null )

         {

             try

             {

                 writeXmlFile( output, effectiveSite );

             }

             catch ( IOException e )

             {

                 throw new MojoExecutionException( "Cannot write effective site descriptor to output: " + output, e );

             }

             if ( getLog().isInfoEnabled() )

             {

                 getLog().info( "Effective site descriptor written to: " + output );

             }

         }

         else

         {

             StringBuffer message = new StringBuffer();

             message.append( "\nEffective site descriptor, after inheritance and interpolation:\n\n" );

             message.append( effectiveSite );

             message.append( "\n" );

             if ( getLog().isInfoEnabled() )

             {

                 getLog().info( message.toString() );

             }

         }

     }

     /**

      * Write comments in the Effective POM/settings header.

      *

      * @param writer not null

      */

     protected static void writeHeader( XMLWriter writer )

     {

         XmlWriterUtil.writeCommentLineBreak( writer );

         XmlWriterUtil.writeComment( writer, " " );

         // Use ISO8601-format for date and time

         DateFormat dateFormat = new SimpleDateFormat( "yyyy-MM-dd'T'hh:mm:ss" );

         XmlWriterUtil.writeComment( writer,

                                     "Generated by Maven Site Plugin on "

                                         + dateFormat.format( new Date( System.currentTimeMillis() ) ) );

         XmlWriterUtil.writeComment( writer, "See: http://maven.apache.org/plugins/maven-site-plugin/" );

         XmlWriterUtil.writeComment( writer, " " );

         XmlWriterUtil.writeCommentLineBreak( writer );

         XmlWriterUtil.writeLineBreak( writer );

     }

     /**

      * Write comments in a normalize way.

      *

      * @param writer not null

      * @param comment not null

      */

     protected static void writeComment( XMLWriter writer, String comment )

     {

         XmlWriterUtil.writeCommentLineBreak( writer );

         XmlWriterUtil.writeComment( writer, " " );

         XmlWriterUtil.writeComment( writer, comment );

         XmlWriterUtil.writeComment( writer, " " );

         XmlWriterUtil.writeCommentLineBreak( writer );

         XmlWriterUtil.writeLineBreak( writer );

     }

     private void writeEffectiveSite( DecorationModel decorationModel, XMLWriter writer )

         throws MojoExecutionException

     {

         String effectiveSite;

         StringWriter sWriter = new StringWriter();

         DecorationXpp3Writer siteWriter = new DecorationXpp3Writer();

         try

         {

             siteWriter.write( sWriter, decorationModel );

         }

         catch ( IOException e )

         {

             throw new MojoExecutionException( "Cannot serialize site descriptor to XML.", e );

         }

         effectiveSite = sWriter.toString();

         writeComment( writer, "Effective site descriptor for project \'" + project.getId() + "\'" );

         writer.writeMarkup( effectiveSite );

     }

     protected static void writeXmlFile( File output, String content )

         throws IOException

     {

         Writer out = null;

         try

         {

             output.getParentFile().mkdirs();

             out = WriterFactory.newXmlWriter( output );

             out.write( content );

             out.flush();

         }

         finally

         {

             IOUtil.close( out );

         }

     }

 }