package org.apache.archiva.redback.integration.util;
   
   /*
    * 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.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Date;
  
  /**
   * DateUtils
   *
   * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>
   *
   */
  public class DateUtils
  {
      /**
       * Provided a date you will get a timestamp and the age/old that you want
       *
       * @param date   the date to compare to now.
       * @param suffix the suffix in the age string.  using "ago" here would result in "2006 Aug 23, 11:43 pm - 12 days ago"
       * @return the formated string.
       */
      public static String formatWithAge( Date date, String suffix )
      {
          return formatWithAge( date, "EEE, d MMM yyyy HH:mm:ss Z", suffix );
      }
  
      /**
       * Provided a date you will get a timestamp and the age/old that you want.
       *
       * @param date       the date to compare to now.
       * @param dateFormat the {@link SimpleDateFormat} format string to use for the date.
       * @param suffix     the suffix in the age string.  using "ago" here would result in "2006 Aug 23, 11:43 pm - 12 days ago"
       * @return the formated string.
       */
      public static String formatWithAge( Date date, String dateFormat, String suffix )
      {
          if ( date == null )
          {
              return null;
          }
  
          SimpleDateFormat format = new SimpleDateFormat( dateFormat );
  
          StringBuilder out = new StringBuilder();
          out.append( format.format( date ) );
          out.append( " - " );
  
          Calendar now = Calendar.getInstance();
          Calendar then = Calendar.getInstance();
          then.setTime( date );
  
          long diffMillis = now.getTimeInMillis() - then.getTimeInMillis();
  
          long days = diffMillis / ( 24 * 60 * 60 * 1000 );
          long hours = diffMillis / ( 60 * 60 * 1000 );
          long minutes = diffMillis / ( 60 * 1000 );
          long seconds = diffMillis / ( 1000 );
  
          if ( days > 0 )
          {
              out.append( String.valueOf( days ) ).append( " day" );
              if ( days > 1 )
              {
                  out.append( 's' );
              }
          }
          else if ( hours > 0 )
          {
              out.append( String.valueOf( hours ) ).append( " hour" );
              if ( hours > 1 )
              {
                  out.append( 's' );
              }
          }
          else if ( minutes > 0 )
          {
              out.append( String.valueOf( minutes ) ).append( " minute" );
              if ( minutes > 1 )
              {
                  out.append( 's' );
             }
         }
         else if ( seconds > 0 )
         {
             out.append( String.valueOf( seconds ) ).append( " second" );
             if ( seconds > 1 )
             {
                 out.append( 's' );
             }
         }
 
         out.append( ' ' ).append( suffix );
 
         return out.toString();
     }
 }