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.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.changes.model.Release;
  
  /**
   * Goal which checks that the changes.xml file has the necessary data to
   * generate an announcement or a report for the current release.
   *
   * @author Justin Edelson
   * @author Dennis Lundberg
   * @since 2.4
   */
  @Mojo( name = "changes-check", threadSafe = true )
  public class ChangesCheckMojo
      extends AbstractChangesMojo
  {
      /**
       * The format that a correct release date should have. This value will be
       * used as a pattern to try to create a date.
       */
      @Parameter( property = "changes.releaseDateFormat", defaultValue = "yyyy-MM-dd" )
      private String releaseDateFormat;
  
      /**
       * Version of the artifact.
       */
      @Parameter( property = "changes.version", defaultValue = "${project.version}", required = true )
      private String version;
  
      /**
       * The path of the <code>changes.xml</code> file that will be checked.
       */
      @Parameter( property = "changes.xmlPath", defaultValue = "src/changes/changes.xml" )
      private File xmlPath;
  
      /**
       * Flag controlling snapshot processing. If set, versions ending with <code>-SNAPSHOT</code> won't be checked.
       *
       * @since 2.7
       */
      @Parameter( property = "changes.skipSnapshots", defaultValue = "false" )
      private boolean skipSnapshots;
  
      private ReleaseUtils releaseUtils = new ReleaseUtils( getLog() );
  
      /**
       * Check that the latest release contains a valid release date.
       *
       * @throws MojoExecutionException
       */
      public void execute()
          throws MojoExecutionException
      {
          // Run only at the execution root
          if ( runOnlyAtExecutionRoot && !isThisTheExecutionRoot() )
          {
              getLog().info( "Skipping the changes check in this project because it's not the Execution Root" );
          }
          else
          {
              if ( this.version.endsWith( "-SNAPSHOT" ) && this.skipSnapshots )
              {
                  getLog().info( "Skipping snapshot version '" + this.version + "'." );
              }
              else if ( xmlPath.exists() )
              {
                  ChangesXML xml = new ChangesXML( xmlPath, getLog() );
                  ReleaseUtils releaseUtils = new ReleaseUtils( getLog() );
                  Release release =
                      releaseUtils.getLatestRelease( releaseUtils.convertReleaseList( xml.getReleaseList() ), version );
  
                 if ( !isValidDate( release.getDateRelease(), releaseDateFormat ) )
                 {
                     throw new MojoExecutionException(
                         "The file " + xmlPath.getAbsolutePath() + " has an invalid release date." );
 
                 }
             }
             else
             {
                 getLog().warn( "The file " + xmlPath.getAbsolutePath() + " does not exist." );
             }
         }
     }
 
     /**
      * Use the pattern to try to parse a Date from the given string.
      *
      * @param string A date as text
      * @param pattern A pattern that can be used by {@link SimpleDateFormat}
      * @return <code>true</code> if the string can be parsed as a date using the pattern, otherwise <code>false</code>
      */
     protected static boolean isValidDate( String string, String pattern )
     {
         if ( StringUtils.isEmpty( string ) )
         {
             return false;
         }
 
         if ( StringUtils.isEmpty( pattern ) )
         {
             return false;
         }
 
         try
         {
             SimpleDateFormat df = new SimpleDateFormat( pattern );
             df.parse( string );
             return true;
         }
         catch ( ParseException e )
         {
             return false;
         }
     }
 }