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 java.io.File;

 import java.io.FileWriter;

 import java.io.IOException;

 import java.io.Writer;

 import java.net.URL;

 import java.text.SimpleDateFormat;

 import java.util.Collections;

 import java.util.Date;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Locale;

 import java.util.Map;

 import java.util.Properties;

 import java.util.ResourceBundle;

 import org.apache.commons.collections.map.CaseInsensitiveMap;

 import org.apache.maven.execution.MavenSession;

 import org.apache.maven.plugins.annotations.Component;

 import org.apache.maven.plugins.annotations.Mojo;

 import org.apache.maven.plugins.annotations.Parameter;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.reporting.MavenReportException;

 import org.apache.maven.shared.filtering.MavenFileFilter;

 import org.apache.maven.shared.filtering.MavenFileFilterRequest;

 import org.apache.maven.shared.filtering.MavenFilteringException;

 import org.codehaus.plexus.util.FileUtils;

 import org.codehaus.plexus.util.IOUtil;

 import org.codehaus.plexus.util.StringUtils;

 import org.apache.commons.io.input.XmlStreamReader;

 /**

  * Goal which creates a nicely formatted Changes Report in html format from a changes.xml file.

  *

  * @author <a href="mailto:jruiz@exist.com">Johnny R. Ruiz III</a>

  * @version $Id: ChangesMojo.java 1423355 2012-12-18 09:03:16Z ltheussl $

  */

 @Mojo( name = "changes-report", threadSafe = true )

 public class ChangesMojo

     extends AbstractChangesReport

 {

     /**

      * A flag whether the report should also include changes from child modules. If set to <code>false</code>, only

      * the changes from current project will be written to the report.

      *

      * @since 2.5

      */

     @Parameter( defaultValue = "false" )

     private boolean aggregated;

     /**

      * A flag whether the report should also include the dates of individual actions. If set to <code>false</code>, only

      * the dates of releases will be written to the report.

      *

      * @since 2.1

      */

     @Parameter( property = "changes.addActionDate", defaultValue = "false" )

     private boolean addActionDate;

     /**

      * Whether HTML code within an action should be escaped. By changing this to

      * <code>false</code> you can restore the behavior that was in version 2.2

      * of this plugin, allowing you to use HTML code to format the content of an

      * action.

      * <p>

      * <strong>Note:</strong> If you use HTML code in an action you need to

      * place it inside a CDATA section.

      * </p>

      * <strong>Note:</strong> Putting any kind of markup inside a CDATA section

      * might mess up the Changes Report or other generated documents, such as

      * PDFs, that are based on your <code>changes.xml</code> file if you are not

      * careful.

      *

      * @since 2.4

      * @deprecated using markup inside CDATA sections does not work for all output formats!

      */

     @Parameter( defaultValue = "true" )

     private boolean escapeHTML;

     /**

      * The directory for interpolated changes.xml.

      *

      * @since 2.2

      */

     @Parameter( defaultValue = "${project.build.directory}/changes", required = true, readonly = true )

     private File filteredOutputDirectory;

     /**

      * applying filtering filtering "a la" resources plugin

      *

      * @since 2.2

      */

     @Parameter( defaultValue = "false" )

     private boolean filteringChanges;

     /**

      * Template string that is used to discover the URL to use to display an issue report.

      * There are 2 template tokens you can use. <code>%URL%</code>: this is computed by getting the

      * <code>&lt;issueManagement&gt;/&lt;url&gt;</code> value from the POM, and removing the last '/'

      * and everything that comes after it. <code>%ISSUE%</code>: this is the issue number.

      * <p>

      * <strong>Note:</strong> In versions of this plugin prior to 2.0-beta-2 this parameter was called

      * <code>link_template</code>.

      * </p>

      *

      * @since 2.0-beta-2

      * @deprecated As of 2.1 use issueLinkTemplatePerSystem : this one will be with system default

      */

     @Parameter( property = "changes.issueLinkTemplate", defaultValue = "%URL%/ViewIssue.jspa?key=%ISSUE%" )

     private String issueLinkTemplate;

     /**

      * Template strings per system that is used to discover the URL to use to display an issue report. Each key in this

      * map denotes the (case-insensitive) identifier of the issue tracking system and its value gives the URL template.

      * <p>

      * There are 2 template tokens you can use. <code>%URL%</code>: this is computed by getting the

      * <code>&lt;issueManagement&gt;/&lt;url&gt;</code> value from the POM, and removing the last '/'

      * and everything that comes after it. <code>%ISSUE%</code>: this is the issue number.

      * </p>

      * <p>

      * <strong>Note:</strong> The deprecated issueLinkTemplate will be used for a system called "default".

      * </p>

      * <p>

      * <strong>Note:</strong> Starting with version 2.4 you usually don't need

      * to specify this, unless you need to link to an issue management system in

      * your Changes report that isn't supported out of the box. See the

      * <a href="./usage.html">Usage page</a> for more

      * information.

      * </p>

      *

      * @since 2.1

      */

     @Parameter

     private Map issueLinkTemplatePerSystem;

     /**

      * @since 2.2

      */

     @Component

     private MavenFileFilter mavenFileFilter;

     /**

      * Format to use for publishDate. The value will be available with the following expression ${publishDate}

      *

      * @see java.text.SimpleDateFormat

      * @since 2.2

      */

     @Parameter( defaultValue = "yyyy-MM-dd" )

     private String publishDateFormat;

     /**

      * Locale to use for publishDate when formatting

      *

      * @see java.util.Locale

      * @since 2.2

      */

     @Parameter( defaultValue = "en" )

     private String publishDateLocale;

     /**

      * @since 2.2

      */

     @Component

     protected MavenSession session;

     /**

      * @since 2.4

      */

     @Parameter( defaultValue = "${project.issueManagement.system}", readonly = true )

     private String system;

     /**

      * The URI of a file containing all the team members. If this is set to the

      * special value "none", no links will be generated for the team members.

      *

      * @since 2.4

      */

     @Parameter( defaultValue = "team-list.html" )

     private String teamlist;

     /**

      */

     @Parameter( defaultValue = "${project.issueManagement.url}", readonly = true )

     private String url;

     /**

      * The type of the feed to generate.

      *

      * <p>

      * Supported values are:

      * <code>"rss_0.9", "rss_0.91N" (RSS 0.91 Netscape), "rss_0.91U" (RSS 0.91 Userland),

      * "rss_0.92", "rss_0.93", "rss_0.94", "rss_1.0", "rss_2.0", "atom_0.3", "atom_1.0"</code>.

      * </p>

      *

      * <p>If not specified, no feed is generated.</p>

      *

      * @since 2.9

      */

     @Parameter

     private String feedType;

     /**

      * The path of the <code>changes.xml</code> file that will be converted into an HTML report.

      */

     @Parameter( property = "changes.xmlPath", defaultValue = "src/changes/changes.xml" )

     private File xmlPath;

     private ReleaseUtils releaseUtils = new ReleaseUtils( getLog() );

     private CaseInsensitiveMap caseInsensitiveIssueLinkTemplatePerSystem;

     /* --------------------------------------------------------------------- */

     /* Public methods                                                        */

     /* --------------------------------------------------------------------- */

     public boolean canGenerateReport()

     {

         return xmlPath.isFile();

     }

     public void executeReport( Locale locale )

         throws MavenReportException

     {

         Date now = new Date();

         SimpleDateFormat simpleDateFormat =

                 new SimpleDateFormat(publishDateFormat, new Locale(publishDateLocale));

         Properties additionalProperties = new Properties();

         additionalProperties.put("publishDate", simpleDateFormat.format(now));

         ChangesXML changesXml = getChangesFromFile( xmlPath, project, additionalProperties);

         if ( changesXml == null ) return;

         if ( aggregated )

         {

             final String basePath = project.getBasedir().getAbsolutePath();

             final String absolutePath = xmlPath.getAbsolutePath();

             if ( !absolutePath.startsWith( basePath ) )

             {

                 getLog().warn( "xmlPath should be within the project dir for aggregated changes report." );

                 return;

             }

             final String relativePath = absolutePath.substring( basePath.length() );

             List releaseList = changesXml.getReleaseList();

             for ( Iterator iterator = project.getCollectedProjects().iterator(); iterator.hasNext(); )

             {

                 final MavenProject childProject = (MavenProject) iterator.next();

                 final File changesFile = new File( childProject.getBasedir(), relativePath );

                 final ChangesXML childXml = getChangesFromFile( changesFile, childProject, additionalProperties );

                 if ( childXml != null )

                 {

                     releaseList = releaseUtils.mergeReleases( releaseList, childProject.getName(), childXml.getReleaseList() );

                 }

             }

             changesXml.setReleaseList( releaseList );

         }

         ChangesReportGenerator report = new ChangesReportGenerator( changesXml.getReleaseList() );

         report.setAuthor( changesXml.getAuthor() );

         report.setTitle( changesXml.getTitle() );

         report.setEscapeHTML ( escapeHTML );

         // Create a case insensitive version of issueLinkTemplatePerSystem

         // We need something case insensitive to maintain backward compatibility

         if ( issueLinkTemplatePerSystem == null )

         {

             caseInsensitiveIssueLinkTemplatePerSystem = new CaseInsensitiveMap();

         }

         else

         {

             caseInsensitiveIssueLinkTemplatePerSystem = new CaseInsensitiveMap( issueLinkTemplatePerSystem );

         }

         // Set good default values for issue management systems here, but only

         // if they have not been configured already by the user

         addIssueLinkTemplate( ChangesReportGenerator.DEFAULT_ISSUE_SYSTEM_KEY, issueLinkTemplate );

         addIssueLinkTemplate( "Bitbucket", "%URL%/issue/%ISSUE%" );

         addIssueLinkTemplate( "Bugzilla", "%URL%/show_bug.cgi?id=%ISSUE%" );

         addIssueLinkTemplate( "GitHub", "%URL%/%ISSUE%" );

         addIssueLinkTemplate( "GoogleCode", "%URL%/detail?id=%ISSUE%" );

         addIssueLinkTemplate( "JIRA", "%URL%/%ISSUE%" );

         addIssueLinkTemplate( "Mantis", "%URL%/view.php?id=%ISSUE%" );

         addIssueLinkTemplate( "MKS", "%URL%/viewissue?selection=%ISSUE%" );

         addIssueLinkTemplate( "Redmine", "%URL%/issues/show/%ISSUE%" );

         addIssueLinkTemplate( "Scarab", "%URL%/issues/id/%ISSUE%" );

         addIssueLinkTemplate( "SourceForge", "http://sourceforge.net/support/tracker.php?aid=%ISSUE%" );

         addIssueLinkTemplate( "SourceForge2", "%URL%/%ISSUE%" );

         addIssueLinkTemplate( "Trac", "%URL%/ticket/%ISSUE%" );

         addIssueLinkTemplate( "Trackplus", "%URL%/printItem.action?key=%ISSUE%" );

         addIssueLinkTemplate( "YouTrack", "%URL%/issue/%ISSUE%" );

         // @todo Add more issue management systems here

         // Remember to also add documentation in usage.apt.vm

         // Show the current issueLinkTemplatePerSystem configuration

         logIssueLinkTemplatePerSystem( caseInsensitiveIssueLinkTemplatePerSystem );

         report.setIssueLinksPerSystem( caseInsensitiveIssueLinkTemplatePerSystem );

         report.setSystem( system );

         report.setTeamlist ( teamlist );

         report.setUrl( url );

         report.setAddActionDate( addActionDate );

         if ( StringUtils.isEmpty( url ) )

         {

             getLog().warn( "No issue management URL defined in POM. Links to your issues will not work correctly." );

         }

         boolean feedGenerated = false;

         if ( StringUtils.isNotEmpty( feedType ) )

         {

             feedGenerated = generateFeed( changesXml, locale );

         }

         report.setLinkToFeed( feedGenerated );

         report.doGenerateReport( getBundle( locale ), getSink() );

         // Copy the images

         copyStaticResources();

     }

     public String getDescription( Locale locale )

     {

         return getBundle( locale ).getString( "report.issues.description" );

     }

     public String getName( Locale locale )

     {

         return getBundle( locale ).getString( "report.issues.name" );

     }

     public String getOutputName()

     {

         return "changes-report";

     }

     /* --------------------------------------------------------------------- */

     /* Private methods                                                       */

     /* --------------------------------------------------------------------- */

     /**

      * Parses specified changes.xml file. It also makes filtering if needed. If specified file doesn't exist

      * it will log warning and return <code>null</code>.

      *

      * @param changesXml changes xml file to parse

      * @param project maven project to parse changes for

      * @param additionalProperties additional properties used for filtering

      * @return parsed <code>ChangesXML</code> instance or null if file doesn't exist

      * @throws MavenReportException if any errors occurs while parsing

      */

     private ChangesXML getChangesFromFile( File changesXml, MavenProject project, Properties additionalProperties )

         throws MavenReportException

     {

         if ( !changesXml.exists() )

         {

             getLog().warn( "changes.xml file " + changesXml.getAbsolutePath() + " does not exist." );

             return null;

         }

         if ( filteringChanges )

         {

             if ( !filteredOutputDirectory.exists() )

             {

                 filteredOutputDirectory.mkdirs();

             }

             XmlStreamReader xmlStreamReader = null;

             try

             {

                 // so we get encoding from the file itself

                 xmlStreamReader = new XmlStreamReader( changesXml );

                 String encoding = xmlStreamReader.getEncoding();

                 File resultFile = new File( filteredOutputDirectory, project.getGroupId() + "." + project.getArtifactId() + "-changes.xml" );

                 final MavenFileFilterRequest mavenFileFilterRequest =

                         new MavenFileFilterRequest( changesXml, resultFile, true, project, Collections.EMPTY_LIST, false,

                                 encoding, session, additionalProperties );

                 mavenFileFilter.copyFile( mavenFileFilterRequest );

                 changesXml = resultFile;

             }

             catch ( IOException e )

             {

                 throw new MavenReportException( "Exception during filtering changes file : " + e.getMessage(), e );

             }

             catch ( MavenFilteringException e )

             {

                 throw new MavenReportException( "Exception during filtering changes file : " + e.getMessage(), e );

             }

             finally

             {

                 if ( xmlStreamReader != null )

                 {

                     IOUtil.close( xmlStreamReader );

                 }

             }

         }

         return new ChangesXML( changesXml, getLog() );

     }

     /**

      * Add the issue link template for the given issue management system,

      * but only if it has not already been configured.

      *

      * @param system The issue management system

      * @param issueLinkTemplate The issue link template to use

      * @since 2.4

      */

     private void addIssueLinkTemplate( String system, String issueLinkTemplate )

     {

         if ( caseInsensitiveIssueLinkTemplatePerSystem == null )

         {

             caseInsensitiveIssueLinkTemplatePerSystem = new CaseInsensitiveMap();

         }

         if ( !caseInsensitiveIssueLinkTemplatePerSystem.containsKey( system ) )

         {

             caseInsensitiveIssueLinkTemplatePerSystem.put( system, issueLinkTemplate );

         }

     }

     private void copyStaticResources()

         throws MavenReportException

     {

         final String pluginResourcesBase = "org/apache/maven/plugin/changes";

         String resourceNames[] = {

             "images/add.gif",

             "images/fix.gif",

             "images/icon_help_sml.gif",

             "images/remove.gif",

             "images/rss.png",

             "images/update.gif" };

         try

         {

             getLog().debug( "Copying static resources." );

             for ( int i = 0; i < resourceNames.length; i++ )

             {

                 URL url = this.getClass().getClassLoader().getResource( pluginResourcesBase + "/" + resourceNames[i] );

                 FileUtils.copyURLToFile( url, new File( getReportOutputDirectory(), resourceNames[i] ) );

             }

         }

         catch ( IOException e )

         {

             throw new MavenReportException( "Unable to copy static resources." );

         }

     }

     private ResourceBundle getBundle( Locale locale )

     {

         return ResourceBundle.getBundle( "changes-report", locale, this.getClass().getClassLoader() );

     }

     protected String getTeamlist()

     {

         return teamlist;

     }

     private void logIssueLinkTemplatePerSystem( Map issueLinkTemplatePerSystem )

     {

         if ( getLog().isDebugEnabled() )

         {

             if ( issueLinkTemplatePerSystem == null )

             {

                 getLog().debug( "No issueLinkTemplatePerSystem configuration was found" );

             }

             else

             {

                 Iterator iterator = issueLinkTemplatePerSystem.entrySet().iterator();

                 while ( iterator.hasNext() )

                 {

                     Map.Entry entry = (Map.Entry) iterator.next();

                     getLog().debug( "issueLinkTemplatePerSystem[" + entry.getKey() + "] = " + entry.getValue() );

                 }

             }

         }

     }

     private boolean generateFeed( final ChangesXML changesXml, final Locale locale )

     {

         getLog().debug( "Generating " + feedType + " feed." );

         boolean success = true;

         final FeedGenerator feed = new FeedGenerator( locale );

         feed.setLink( project.getUrl() + "/changes-report.html" ); // TODO: better way?

         feed.setTitle( project.getName() + ": " + changesXml.getTitle() );

         feed.setAuthor( changesXml.getAuthor() );

         feed.setDateFormat( new SimpleDateFormat( publishDateFormat, new Locale( publishDateLocale ) ) );

         Writer writer = null;

         try

         {

             writer = new FileWriter( new File( getReportOutputDirectory(), "changes.rss" ) );

             feed.export( changesXml.getReleaseList(), feedType, writer );

         }

         catch ( IOException ex )

         {

             success = false;

             getLog().warn( "Failed to create rss feed: " + ex.getMessage() );

             getLog().debug( ex );

         }

         finally

         {

             try

             {

                 if ( writer != null )

                 {

                     writer.close();

                 }

             }

             catch ( IOException ex )

             {

                 getLog().warn( "Failed to close writer: " + ex.getMessage() );

                 getLog().debug( ex );

             }

         }

         return success;

     }

 }