package org.apache.maven.plugins.site.render;
   
   /*
    * 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.artifact.Artifact;
  import org.apache.maven.doxia.site.decoration.DecorationModel;
  import org.apache.maven.doxia.site.decoration.Menu;
  import org.apache.maven.doxia.site.decoration.MenuItem;
  import org.apache.maven.doxia.siterenderer.DocumentRenderer;
  import org.apache.maven.doxia.siterenderer.Renderer;
  import org.apache.maven.doxia.siterenderer.RendererException;
  import org.apache.maven.doxia.siterenderer.RenderingContext;
  import org.apache.maven.doxia.siterenderer.SiteRenderingContext;
  import org.apache.maven.doxia.tools.SiteToolException;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.model.ReportPlugin;
  import org.apache.maven.model.Reporting;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.plugin.descriptor.PluginDescriptor;
  import org.apache.maven.plugins.annotations.Component;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.site.descriptor.AbstractSiteDescriptorMojo;
  import org.apache.maven.reporting.MavenReport;
  import org.apache.maven.reporting.exec.MavenReportExecution;
  import org.apache.maven.reporting.exec.MavenReportExecutor;
  import org.apache.maven.reporting.exec.MavenReportExecutorRequest;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  
  import static org.apache.maven.shared.utils.logging.MessageUtils.buffer;
  
  /**
   * Base class for site rendering mojos.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   *
   */
  public abstract class AbstractSiteRenderingMojo extends AbstractSiteDescriptorMojo
  {
      /**
       * Module type exclusion mappings
       * ex: <code>fml  -> **&#47;*-m1.fml</code>  (excludes fml files ending in '-m1.fml' recursively)
       * <p/>
       * The configuration looks like this:
       * <pre>
       *   &lt;moduleExcludes&gt;
       *     &lt;moduleType&gt;filename1.ext,**&#47;*sample.ext&lt;/moduleType&gt;
       *     &lt;!-- moduleType can be one of 'apt', 'fml' or 'xdoc'. --&gt;
       *     &lt;!-- The value is a comma separated list of           --&gt;
       *     &lt;!-- filenames or fileset patterns.                   --&gt;
       *     &lt;!-- Here's an example:                               --&gt;
       *     &lt;xdoc&gt;changes.xml,navigation.xml&lt;/xdoc&gt;
       *   &lt;/moduleExcludes&gt;
       * </pre>
       */
      @Parameter
      private Map<String, String> moduleExcludes;
  
      /**
       * The location of a Velocity template file to use. When used, skins and the default templates, CSS and images
       * are disabled. It is highly recommended that you package this as a skin instead.
       *
       * @since 2.0-beta-5
       */
      @Parameter( property = "templateFile" )
      private File templateFile;
  
      /**
       * Additional template properties for rendering the site. See
       * <a href="/doxia/doxia-sitetools/doxia-site-renderer/">Doxia Site Renderer</a>.
      */
     @Parameter
     private Map<String, Object> attributes;
 
     /**
      * Site renderer.
      */
     @Component
     protected Renderer siteRenderer;
 
     /**
      * Reports (Maven 2).
      */
     @Parameter( defaultValue = "${reports}", required = true, readonly = true )
     protected List<MavenReport> reports;
 
     /**
      * Alternative directory for xdoc source, useful for m1 to m2 migration
      *
      * @deprecated use the standard m2 directory layout
      */
     @Parameter( defaultValue = "${basedir}/xdocs" )
     private File xdocDirectory;
 
     /**
      * Directory containing generated documentation in source format (Doxia supported markup).
      * This is used to pick up other source docs that might have been generated at build time (by reports or any other
      * build time mean).
      * This directory is expected to have the same structure as <code>siteDirectory</code>
      * (ie. one directory per Doxia-source-supported markup types).
      *
      * todo should we deprecate in favour of reports directly using Doxia Sink API, without this Doxia source
      * intermediate step?
      */
     @Parameter( alias = "workingDirectory", defaultValue = "${project.build.directory}/generated-site" )
     protected File generatedSiteDirectory;
 
     /**
      * The current Maven session.
      */
     @Parameter( defaultValue = "${session}", readonly = true, required = true )
     protected MavenSession mavenSession;
 
     /**
      * replaces previous reportPlugins parameter, that was injected by Maven core from
      * reporting section: but this new configuration format has been abandoned.
      *
      * @since 3.7.1
      */
     @Parameter( defaultValue = "${project.reporting}", readonly = true )
     private Reporting reporting;
 
     /**
      * Whether to generate the summary page for project reports: project-info.html.
      *
      * @since 2.3
      */
     @Parameter( property = "generateProjectInfo", defaultValue = "true" )
     private boolean generateProjectInfo;
 
     /**
      * Specifies the input encoding.
      *
      * @since 2.3
      */
     @Parameter( property = "encoding", defaultValue = "${project.build.sourceEncoding}" )
     private String inputEncoding;
 
     /**
      * Specifies the output encoding.
      *
      * @since 2.3
      */
     @Parameter( property = "outputEncoding", defaultValue = "${project.reporting.outputEncoding}" )
     private String outputEncoding;
 
     @Component
     protected MavenReportExecutor mavenReportExecutor;
 
     /**
      * Gets the input files encoding.
      *
      * @return The input files encoding, never <code>null</code>.
      */
     protected String getInputEncoding()
     {
         return ( StringUtils.isEmpty( inputEncoding ) ) ? ReaderFactory.FILE_ENCODING : inputEncoding;
     }
 
     /**
      * Gets the effective reporting output files encoding.
      *
      * @return The effective reporting output file encoding, never <code>null</code>.
      */
     protected String getOutputEncoding()
     {
         return ( outputEncoding == null ) ? ReaderFactory.UTF_8 : outputEncoding;
     }
 
     /**
      * Whether to save Velocity processed Doxia content (<code>*.&lt;ext&gt;.vm</code>)
      * to <code>${generatedSiteDirectory}/processed</code>.
      *
      * @since 3.5
      */
     @Parameter
     private boolean saveProcessedContent;
 
     protected void checkInputEncoding()
     {
         if ( StringUtils.isEmpty( inputEncoding ) )
         {
             getLog().warn( "Input file encoding has not been set, using platform encoding "
                 + ReaderFactory.FILE_ENCODING + ", i.e. build is platform dependent!" );
         }
     }
 
     protected List<MavenReportExecution> getReports()
         throws MojoExecutionException
     {
         MavenReportExecutorRequest mavenReportExecutorRequest = new MavenReportExecutorRequest();
         mavenReportExecutorRequest.setLocalRepository( localRepository );
         mavenReportExecutorRequest.setMavenSession( mavenSession );
         mavenReportExecutorRequest.setProject( project );
         mavenReportExecutorRequest.setReportPlugins( getReportingPlugins() );
 
         List<MavenReportExecution> allReports = mavenReportExecutor.buildMavenReports( mavenReportExecutorRequest );
 
         // filter out reports that can't be generated
         List<MavenReportExecution> reportExecutions = new ArrayList<>( allReports.size() );
         for ( MavenReportExecution exec : allReports )
         {
             if ( exec.canGenerateReport() )
             {
                 reportExecutions.add( exec );
             }
         }
         return reportExecutions;
     }
 
     /**
      * Get the report plugins from reporting section, adding if necessary (i.e. not excluded)
      * default reports (i.e. maven-project-info-reports)
      *
      * @return the effective list of reports
      * @since 3.7.1
      */
     private ReportPlugin[] getReportingPlugins()
     {
         List<ReportPlugin> reportingPlugins = reporting.getPlugins();
 
         // MSITE-806: add default report plugin like done in maven-model-builder DefaultReportingConverter
         boolean hasMavenProjectInfoReportsPlugin = false;
         for ( ReportPlugin plugin : reportingPlugins )
         {
             if ( "org.apache.maven.plugins".equals( plugin.getGroupId() )
                 && "maven-project-info-reports-plugin".equals( plugin.getArtifactId() ) )
             {
                 hasMavenProjectInfoReportsPlugin = true;
                 break;
             }
         }
 
         if ( !reporting.isExcludeDefaults() && !hasMavenProjectInfoReportsPlugin )
         {
             ReportPlugin mpir = new ReportPlugin();
             mpir.setArtifactId( "maven-project-info-reports-plugin" );
             reportingPlugins.add( mpir );
         }
         return reportingPlugins.toArray( new ReportPlugin[reportingPlugins.size()] );
     }
 
     protected SiteRenderingContext createSiteRenderingContext( Locale locale )
         throws MojoExecutionException, IOException, MojoFailureException
     {
         DecorationModel decorationModel = prepareDecorationModel( locale );
         if ( attributes == null )
         {
             attributes = new HashMap<>();
         }
 
         if ( attributes.get( "project" ) == null )
         {
             attributes.put( "project", project );
         }
 
         if ( attributes.get( "inputEncoding" ) == null )
         {
             attributes.put( "inputEncoding", getInputEncoding() );
         }
 
         if ( attributes.get( "outputEncoding" ) == null )
         {
             attributes.put( "outputEncoding", getOutputEncoding() );
         }
 
         // Put any of the properties in directly into the Velocity context
         for ( Map.Entry<Object, Object> entry : project.getProperties().entrySet() )
         {
             attributes.put( (String) entry.getKey(), entry.getValue() );
         }
 
         SiteRenderingContext context;
         if ( templateFile != null )
         {
             getLog().info( buffer().a( "Rendering content with " ).strong( templateFile
                 + " template file" ).a( '.' ).toString() );
 
             if ( !templateFile.exists() )
             {
                 throw new MojoFailureException( "Template file '" + templateFile + "' does not exist" );
             }
             context = siteRenderer.createContextForTemplate( templateFile, attributes, decorationModel,
                                                              project.getName(), locale );
         }
         else
         {
             try
             {
                 Artifact skinArtifact =
                     siteTool.getSkinArtifactFromRepository( localRepository, repositories, decorationModel );
 
                 getLog().info( buffer().a( "Rendering content with " ).strong( skinArtifact.getId()
                     + " skin" ).a( '.' ).toString() );
 
                 context = siteRenderer.createContextForSkin( skinArtifact, attributes, decorationModel,
                                                              project.getName(), locale );
             }
             catch ( SiteToolException e )
             {
                 throw new MojoExecutionException( "SiteToolException while preparing skin: " + e.getMessage(), e );
             }
             catch ( RendererException e )
             {
                 throw new MojoExecutionException( "RendererException while preparing context for skin: "
                     + e.getMessage(), e );
             }
         }
 
         // Generate static site
         context.setRootDirectory( project.getBasedir() );
         if ( !locale.getLanguage().equals( Locale.getDefault().getLanguage() ) )
         {
             context.addSiteDirectory( new File( siteDirectory, locale.getLanguage() ) );
             context.addModuleDirectory( new File( xdocDirectory, locale.getLanguage() ), "xdoc" );
             context.addModuleDirectory( new File( xdocDirectory, locale.getLanguage() ), "fml" );
         }
         else
         {
             context.addSiteDirectory( siteDirectory );
             context.addModuleDirectory( xdocDirectory, "xdoc" );
             context.addModuleDirectory( xdocDirectory, "fml" );
         }
 
         if ( moduleExcludes != null )
         {
             context.setModuleExcludes( moduleExcludes );
         }
 
         if ( saveProcessedContent )
         {
             context.setProcessedContentOutput( new File( generatedSiteDirectory, "processed" ) );
         }
 
         return context;
     }
 
     /**
      * Go through the list of reports and process each one like this:
      * <ul>
      * <li>Add the report to a map of reports keyed by filename having the report itself as value
      * <li>If the report is not yet in the map of documents, add it together with a suitable renderer
      * </ul>
      *
      * @param reports A List of MavenReports
      * @param documents A Map of documents, keyed by filename
      * @param locale the Locale the reports are processed for.
      * @return A map with all reports keyed by filename having the report itself as value.
      * The map will be used to populate a menu.
      */
     protected Map<String, MavenReport> locateReports( List<MavenReportExecution> reports,
                                                       Map<String, DocumentRenderer> documents, Locale locale )
     {
         // copy Collection to prevent ConcurrentModificationException
         List<MavenReportExecution> filtered = new ArrayList<>( reports );
 
         Map<String, MavenReport> reportsByOutputName = new LinkedHashMap<>();
         for ( MavenReportExecution mavenReportExecution : filtered )
         {
             MavenReport report = mavenReportExecution.getMavenReport();
 
             String outputName = report.getOutputName() + ".html";
 
             // Always add the report to the menu, see MSITE-150
             reportsByOutputName.put( report.getOutputName(), report );
 
             if ( documents.containsKey( outputName ) )
             {
                 String reportMojoInfo =
                     ( mavenReportExecution.getGoal() == null ) ? "" : ( " ("
                         + mavenReportExecution.getPlugin().getArtifactId() + ':'
                         + mavenReportExecution.getPlugin().getVersion() + ':' + mavenReportExecution.getGoal() + ')' );
 
                 getLog().info( "Skipped \"" + report.getName( locale ) + "\" report" + reportMojoInfo + ", file \""
                                    + outputName + "\" already exists." );
 
                 reports.remove( mavenReportExecution );
             }
             else
             {
                 String reportMojoInfo = mavenReportExecution.getPlugin().getGroupId() + ':'
                     + mavenReportExecution.getPlugin().getArtifactId() + ':'
                     + mavenReportExecution.getPlugin().getVersion() + ':' + mavenReportExecution.getGoal();
                 RenderingContext renderingContext = new RenderingContext( siteDirectory, outputName, reportMojoInfo );
                 DocumentRenderer renderer =
                     new ReportDocumentRenderer( mavenReportExecution, renderingContext, getLog() );
                 documents.put( outputName, renderer );
             }
         }
         return reportsByOutputName;
     }
 
     /**
      * Go through the collection of reports and put each report into a list for the appropriate category. The list is
      * put into a map keyed by the name of the category.
      *
      * @param reports A Collection of MavenReports
      * @return A map keyed category having the report itself as value
      */
     protected Map<String, List<MavenReport>> categoriseReports( Collection<MavenReport> reports )
     {
         Map<String, List<MavenReport>> categories = new LinkedHashMap<>();
         for ( MavenReport report : reports )
         {
             List<MavenReport> categoryReports = categories.get( report.getCategoryName() );
             if ( categoryReports == null )
             {
                 categoryReports = new ArrayList<>();
                 categories.put( report.getCategoryName(), categoryReports );
             }
             categoryReports.add( report );
         }
         return categories;
     }
 
     /**
      * Locate every document to be rendered for given locale:<ul>
      * <li>handwritten content, ie Doxia files,</li>
      * <li>reports,</li>
      * <li>"Project Information" and "Project Reports" category summaries.</li>
      * </ul>
      *
      * @param context the site context
      * @param reports the documents
      * @param locale the locale
      * @return the documents and their renderers
      * @throws IOException in case of file reading issue
      * @throws RendererException in case of Doxia rendering issue
      * @see CategorySummaryDocumentRenderer
      */
     protected Map<String, DocumentRenderer> locateDocuments( SiteRenderingContext context,
                                                              List<MavenReportExecution> reports, Locale locale )
         throws IOException, RendererException
     {
         Map<String, DocumentRenderer> documents = siteRenderer.locateDocumentFiles( context, true );
 
         Map<String, MavenReport> reportsByOutputName = locateReports( reports, documents, locale );
 
         // TODO: I want to get rid of categories eventually. There's no way to add your own in a fully i18n manner
         Map<String, List<MavenReport>> categories = categoriseReports( reportsByOutputName.values() );
 
         siteTool.populateReportsMenu( context.getDecoration(), locale, categories );
         populateReportItems( context.getDecoration(), locale, reportsByOutputName );
 
         if ( categories.containsKey( MavenReport.CATEGORY_PROJECT_INFORMATION ) && generateProjectInfo )
         {
             // add "Project Information" category summary document
             List<MavenReport> categoryReports = categories.get( MavenReport.CATEGORY_PROJECT_INFORMATION );
 
             RenderingContext renderingContext =
                 new RenderingContext( siteDirectory, "project-info.html",
                                       getSitePluginInfo() + ":CategorySummaryDocumentRenderer" );
             String title = i18n.getString( "site-plugin", locale, "report.information.title" );
             String desc1 = i18n.getString( "site-plugin", locale, "report.information.description1" );
             String desc2 = i18n.getString( "site-plugin", locale, "report.information.description2" );
             DocumentRenderer renderer = new CategorySummaryDocumentRenderer( renderingContext, title, desc1, desc2,
                                                                              i18n, categoryReports, getLog() );
 
             if ( !documents.containsKey( renderer.getOutputName() ) )
             {
                 documents.put( renderer.getOutputName(), renderer );
             }
             else
             {
                 getLog().info( "Category summary '" + renderer.getOutputName() + "' skipped; already exists" );
             }
         }
 
         if ( categories.containsKey( MavenReport.CATEGORY_PROJECT_REPORTS ) )
         {
             // add "Project Reports" category summary document
             List<MavenReport> categoryReports = categories.get( MavenReport.CATEGORY_PROJECT_REPORTS );
             RenderingContext renderingContext =
                 new RenderingContext( siteDirectory, "project-reports.html",
                                       getSitePluginInfo() + ":CategorySummaryDocumentRenderer" );
             String title = i18n.getString( "site-plugin", locale, "report.project.title" );
             String desc1 = i18n.getString( "site-plugin", locale, "report.project.description1" );
             String desc2 = i18n.getString( "site-plugin", locale, "report.project.description2" );
             DocumentRenderer renderer = new CategorySummaryDocumentRenderer( renderingContext, title, desc1, desc2,
                                                                              i18n, categoryReports, getLog() );
 
             if ( !documents.containsKey( renderer.getOutputName() ) )
             {
                 documents.put( renderer.getOutputName(), renderer );
             }
             else
             {
                 getLog().info( "Category summary '" + renderer.getOutputName() + "' skipped; already exists" );
             }
         }
         return documents;
     }
 
     private String getSitePluginInfo()
     {
         PluginDescriptor pluginDescriptor = (PluginDescriptor) getPluginContext().get( "pluginDescriptor" );
         return pluginDescriptor.getId();
     }
     protected void populateReportItems( DecorationModel decorationModel, Locale locale,
                                         Map<String, MavenReport> reportsByOutputName )
     {
         for ( Menu menu : decorationModel.getMenus() )
         {
             populateItemRefs( menu.getItems(), locale, reportsByOutputName );
         }
     }
 
     private void populateItemRefs( List<MenuItem> items, Locale locale, Map<String, MavenReport> reportsByOutputName )
     {
         for ( Iterator<MenuItem> i = items.iterator(); i.hasNext(); )
         {
             MenuItem item = i.next();
 
             if ( item.getRef() != null )
             {
                 MavenReport report = reportsByOutputName.get( item.getRef() );
 
                 if ( report != null )
                 {
                     if ( item.getName() == null )
                     {
                         item.setName( report.getName( locale ) );
                     }
 
                     if ( item.getHref() == null || item.getHref().length() == 0 )
                     {
                         item.setHref( report.getOutputName() + ".html" );
                     }
                 }
                 else
                 {
                     getLog().warn( "Unrecognised reference: '" + item.getRef() + "'" );
                     i.remove();
                 }
             }
 
             populateItemRefs( item.getItems(), locale, reportsByOutputName );
         }
     }
 }