package org.apache.maven.plugin.changes;

 /*

  * 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.io.IOUtils;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.artifact.factory.ArtifactFactory;

 import org.apache.maven.artifact.repository.ArtifactRepository;

 import org.apache.maven.artifact.resolver.ArtifactNotFoundException;

 import org.apache.maven.artifact.resolver.ArtifactResolutionException;

 import org.apache.maven.artifact.resolver.ArtifactResolver;

 import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;

 import org.apache.maven.artifact.versioning.VersionRange;

 import org.apache.maven.doxia.sink.render.RenderingContext;

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

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

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

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

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

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

 import org.apache.maven.doxia.siterenderer.sink.SiteRendererSink;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.reporting.AbstractMavenReport;

 import org.apache.maven.reporting.MavenReportException;

 import org.codehaus.plexus.i18n.I18N;

 import org.codehaus.plexus.util.ReaderFactory;

 import java.io.File;

 import java.io.FileOutputStream;

 import java.io.OutputStreamWriter;

 import java.io.IOException;

 import java.io.Writer;

 import java.util.HashMap;

 import java.util.Locale;

 import java.util.Map;

 /**

  * Base class with the things that should be in AbstractMavenReport anyway.

  *

  * Note: This file was copied from r415312 of AbstractProjectInfoReport in

  * maven-project-info-reports, as a work-around to MCHANGES-88.

  *

  * @author <a href="mailto:brett@apache.org">Brett Porter</a>

  *

  */

 public abstract class AbstractChangesReport

     extends AbstractMavenReport

 {

     /**

      * Report output directory. Note that this parameter is only relevant if the goal is run from the command line or

      * from the default build lifecycle. If the goal is run indirectly as part of a site generation, the output

      * directory configured in the Maven Site Plugin is used instead.

      * 

      * @parameter default-value="${project.reporting.outputDirectory}"

      */

     private File outputDirectory;

     /**

      * Report output encoding. Note that this parameter is only relevant if the goal is run from the command line or

      * from the default build lifecycle. If the goal is run indirectly as part of a site generation, the output

      * encoding configured in the Maven Site Plugin is used instead.

      *

      * @parameter expression="${outputEncoding}" default-value="${project.reporting.outputEncoding}"

      * @since 2.4

      */

     private String outputEncoding;

     /**

      * Doxia Site Renderer.

      *

      * @component

      */

     protected Renderer siteRenderer;

     /**

      * The Maven Project.

      *

      * @parameter expression="${project}"

      * @required

      * @readonly

      */

     protected MavenProject project;

     /**

      * Local Repository.

      *

      * @parameter expression="${localRepository}"

      * @required

      * @readonly

      */

     protected ArtifactRepository localRepository;

     /**

      * @component

      */

     protected ArtifactResolver resolver;

     /**

      * @component

      */

     protected ArtifactFactory factory;

     /**

      * Internationalization.

      *

      * @component

      */

     protected I18N i18n;

     private File getSkinArtifactFile()

         throws MojoExecutionException

     {

         Skin skin = Skin.getDefaultSkin();

         String version = skin.getVersion();

         Artifact artifact;

         try

         {

             if ( version == null )

             {

                 version = Artifact.RELEASE_VERSION;

             }

             VersionRange versionSpec = VersionRange.createFromVersionSpec( version );

             artifact = factory.createDependencyArtifact( skin.getGroupId(), skin.getArtifactId(), versionSpec, "jar",

                                                          null, null );

             resolver.resolve( artifact, project.getRemoteArtifactRepositories(), localRepository );

         }

         catch ( InvalidVersionSpecificationException e )

         {

             throw new MojoExecutionException( "The skin version '" + version + "' is not valid: " + e.getMessage() );

         }

         catch ( ArtifactResolutionException e )

         {

             throw new MojoExecutionException( "Unable to find skin", e );

         }

         catch ( ArtifactNotFoundException e )

         {

             throw new MojoExecutionException( "The skin does not exist: " + e.getMessage() );

         }

         return artifact.getFile();

     }

     public void execute()

         throws MojoExecutionException

     {

         if ( !canGenerateReport() )

         {

             return;

         }

         // TODO: push to a helper? Could still be improved by taking more of the site information from the site plugin

         FileOutputStream fileOutputStream = null;

         try

         {

             DecorationModel model = new DecorationModel();

             model.setBody( new Body() );

             Map<String, String> attributes = new HashMap<String, String>();

             attributes.put( "outputEncoding", getOutputEncoding() );

             Locale locale = Locale.getDefault();

             SiteRenderingContext siteContext = siteRenderer.createContextForSkin( getSkinArtifactFile(), attributes,

                                                                                   model, getName( locale ), locale );

             siteContext.setOutputEncoding( getOutputEncoding() );

             RenderingContext context = new RenderingContext( outputDirectory, getOutputName() + ".html" );

             SiteRendererSink sink = new SiteRendererSink( context );

             generate( sink, locale );

             outputDirectory.mkdirs();

             File file = new File( outputDirectory, getOutputName() + ".html" );

             fileOutputStream = new FileOutputStream( file ) ;

             Writer writer = new OutputStreamWriter( fileOutputStream, getOutputEncoding() );

             siteRenderer.generateDocument( writer, sink, siteContext );

             siteRenderer.copyResources( siteContext, new File( project.getBasedir(), "src/site/resources" ),

                                         outputDirectory );

         }

         catch ( RendererException e )

         {

             throw new MojoExecutionException(

                 "An error has occurred in " + getName( Locale.ENGLISH ) + " report generation.", e );

         }

         catch ( IOException e )

         {

             throw new MojoExecutionException(

                 "An error has occurred in " + getName( Locale.ENGLISH ) + " report generation.", e );

         }

         catch ( MavenReportException e )

         {

             throw new MojoExecutionException(

                 "An error has occurred in " + getName( Locale.ENGLISH ) + " report generation.", e );

         }

         finally {

             IOUtils.closeQuietly( fileOutputStream );

         }

     }

     /**

      * @see org.apache.maven.reporting.AbstractMavenReport#getOutputDirectory()

      */

     protected String getOutputDirectory()

     {

         return outputDirectory.getAbsolutePath();

     }

     /**

      * Get the effective reporting output file encoding.

      *

      * @return The effective reporting output file encoding, never <code>null</code>.

      * @since 2.4

      */

     protected String getOutputEncoding()

     {

         return ( outputEncoding != null ) ? outputEncoding : ReaderFactory.UTF_8;

     }

     /**

      * @see org.apache.maven.reporting.AbstractMavenReport#getProject()

      */

     protected MavenProject getProject()

     {

         return project;

     }

     /**

      * @see org.apache.maven.reporting.AbstractMavenReport#getSiteRenderer()

      */

     protected Renderer getSiteRenderer()

     {

         return siteRenderer;

     }

 }