/*
    * This file is part of dependency-check-maven.
    *
    * Licensed 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.
   *
   * Copyright (c) 2015 Jeremy Long. All Rights Reserved.
   */
  package org.owasp.dependencycheck.maven;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Locale;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.plugins.annotations.LifecyclePhase;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.owasp.dependencycheck.utils.Settings;
  
  /**
   * Maven Plugin that purges the local copy of the NVD data.
   *
   * @author Jeremy Long
   */
  @Mojo(
          name = "purge",
          defaultPhase = LifecyclePhase.GENERATE_RESOURCES,
          threadSafe = false,
          requiresDependencyResolution = ResolutionScope.NONE,
          requiresOnline = true,
          aggregator = true
  )
  public class PurgeMojo extends BaseDependencyCheckMojo {
  
      /**
       * Returns false; this mojo cannot generate a report.
       *
       * @return <code>false</code>
       */
      @Override
      public boolean canGenerateReport() {
          return false;
      }
  
      /**
       * Purges the local copy of the NVD.
       *
       * @throws MojoExecutionException thrown if there is an exception executing
       * the goal
       * @throws MojoFailureException thrown if dependency-check is configured to
       * fail the build
       */
      @Override
      public void runCheck() throws MojoExecutionException, MojoFailureException {
  
          if (getConnectionString() != null && !getConnectionString().isEmpty()) {
              final String msg = "Unable to purge the local NVD when using a non-default connection string";
              if (this.isFailOnError()) {
                  throw new MojoFailureException(msg);
              }
              getLog().error(msg);
          } else {
              populateSettings();
              File db;
              try {
                  db = new File(Settings.getDataDirectory(), "dc.h2.db");
                  if (db.exists()) {
                      if (db.delete()) {
                          getLog().info("Database file purged; local copy of the NVD has been removed");
                      } else {
                          final String msg = String.format("Unable to delete '%s'; please delete the file manually", db.getAbsolutePath());
                          if (this.isFailOnError()) {
                              throw new MojoFailureException(msg);
                          }
                          getLog().error(msg);
                      }
                  } else {
                      final String msg = String.format("Unable to purge database; the database file does not exists: %s", db.getAbsolutePath());
                      if (this.isFailOnError()) {
                          throw new MojoFailureException(msg);
                      }
                      getLog().error(msg);
                  }
              } catch (IOException ex) {
                  final String msg = "Unable to delete the database";
                  if (this.isFailOnError()) {
                      throw new MojoExecutionException(msg, ex);
                  }
                  getLog().error(msg);
             }
             Settings.cleanup();
         }
     }
 
     /**
      * Returns the report name.
      *
      * @param locale the location
      * @return the report name
      */
     @Override
     public String getName(Locale locale) {
         return "dependency-check-purge";
     }
 
     /**
      * Gets the description of the Dependency-Check report to be displayed in
      * the Maven Generated Reports page.
      *
      * @param locale The Locale to get the description for
      * @return the description
      */
     @Override
     public String getDescription(Locale locale) {
         return "Purges the local cache of the NVD dataT.";
     }
 
 }