package org.apache.maven.artifact.repository;
   
   /*
    * 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.util.Calendar;
  import java.util.Date;
  import java.util.TimeZone;
  
  /**
   * Describes a set of policies for a repository to use under certain conditions.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   */
  public class ArtifactRepositoryPolicy
  {
      public static final String UPDATE_POLICY_NEVER = "never";
  
      public static final String UPDATE_POLICY_ALWAYS = "always";
  
      public static final String UPDATE_POLICY_DAILY = "daily";
  
      public static final String UPDATE_POLICY_INTERVAL = "interval";
  
      public static final String CHECKSUM_POLICY_FAIL = "fail";
  
      public static final String CHECKSUM_POLICY_WARN = "warn";
  
      public static final String CHECKSUM_POLICY_IGNORE = "ignore";
  
      private boolean enabled;
  
      private String updatePolicy;
  
      private String checksumPolicy;
  
      public ArtifactRepositoryPolicy()
      {
          this( true, null, null );
      }
  
      public ArtifactRepositoryPolicy( ArtifactRepositoryPolicy policy )
      {
          this( policy.isEnabled(), policy.getUpdatePolicy(), policy.getChecksumPolicy() );
      }
  
      public ArtifactRepositoryPolicy( boolean enabled, String updatePolicy, String checksumPolicy )
      {
          this.enabled = enabled;
  
          if ( updatePolicy == null )
          {
              updatePolicy = UPDATE_POLICY_DAILY;
          }
          this.updatePolicy = updatePolicy;
  
          if ( checksumPolicy == null )
          {
              checksumPolicy = CHECKSUM_POLICY_WARN;
          }
          this.checksumPolicy = checksumPolicy;
      }
  
      public void setEnabled( boolean enabled )
      {
          this.enabled = enabled;
      }
  
      public void setUpdatePolicy( String updatePolicy )
      {
          if ( updatePolicy != null )
          {
              this.updatePolicy = updatePolicy;
          }
      }
  
      public void setChecksumPolicy( String checksumPolicy )
      {
          if ( checksumPolicy != null )
          {
              this.checksumPolicy = checksumPolicy;
          }
      }
 
     public boolean isEnabled()
     {
         return enabled;
     }
 
     public String getUpdatePolicy()
     {
         return updatePolicy;
     }
 
     public String getChecksumPolicy()
     {
         return checksumPolicy;
     }
 
     public boolean checkOutOfDate( Date lastModified )
     {
         boolean checkForUpdates = false;
 
         if ( UPDATE_POLICY_ALWAYS.equals( updatePolicy ) )
         {
             checkForUpdates = true;
         }
         else if ( UPDATE_POLICY_DAILY.equals( updatePolicy ) )
         {
             // Get local midnight boundary
             Calendar cal = Calendar.getInstance();
 
             cal.set( Calendar.HOUR_OF_DAY, 0 );
             cal.set( Calendar.MINUTE, 0 );
             cal.set( Calendar.SECOND, 0 );
             cal.set( Calendar.MILLISECOND, 0 );
 
             if ( cal.getTime().after( lastModified ) )
             {
                 checkForUpdates = true;
             }
         }
         else if ( updatePolicy.startsWith( UPDATE_POLICY_INTERVAL ) )
         {
             String s = updatePolicy.substring( UPDATE_POLICY_INTERVAL.length() + 1 );
             int minutes = Integer.valueOf( s );
             Calendar cal = Calendar.getInstance();
             cal.add( Calendar.MINUTE, -minutes );
             if ( cal.getTime().after( lastModified ) )
             {
                 checkForUpdates = true;
             }
         }
         // else assume "never"
         return checkForUpdates;
     }
 
     @Override
     public String toString()
     {
         StringBuilder buffer = new StringBuilder( 64 );
         buffer.append( "{enabled=" );
         buffer.append( enabled );
         buffer.append( ", checksums=" );
         buffer.append( checksumPolicy );
         buffer.append( ", updates=" );
         buffer.append( updatePolicy );
         buffer.append( "}" );
         return buffer.toString();
     }
 
     public void merge( ArtifactRepositoryPolicy policy )
     {
         if ( policy != null && policy.isEnabled() )
         {
             setEnabled( true );
 
             if ( ordinalOfChecksumPolicy( policy.getChecksumPolicy() ) < ordinalOfChecksumPolicy( getChecksumPolicy() ) )
             {
                 setChecksumPolicy( policy.getChecksumPolicy() );
             }
 
             if ( ordinalOfUpdatePolicy( policy.getUpdatePolicy() ) < ordinalOfUpdatePolicy( getUpdatePolicy() ) )
             {
                 setUpdatePolicy( policy.getUpdatePolicy() );
             }
         }
     }
 
     private int ordinalOfChecksumPolicy( String policy )
     {
         if ( ArtifactRepositoryPolicy.CHECKSUM_POLICY_FAIL.equals( policy ) )
         {
             return 2;
         }
         else if ( ArtifactRepositoryPolicy.CHECKSUM_POLICY_IGNORE.equals( policy ) )
         {
             return 0;
         }
         else
         {
             return 1;
         }
     }
 
     private int ordinalOfUpdatePolicy( String policy )
     {
         if ( ArtifactRepositoryPolicy.UPDATE_POLICY_DAILY.equals( policy ) )
         {
             return 1440;
         }
         else if ( ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS.equals( policy ) )
         {
             return 0;
         }
         else if ( policy != null && policy.startsWith( ArtifactRepositoryPolicy.UPDATE_POLICY_INTERVAL ) )
         {
             String s = policy.substring( UPDATE_POLICY_INTERVAL.length() + 1 );
             return Integer.valueOf( s );
         }
         else
         {
             return Integer.MAX_VALUE;
         }
     }
 
 }