<?php

  /*
   * Free IT Foundation
   * Free Technology Serving Knowledge
   * http://www.free-it-foundation.org
   * 
   * This file is part of Knowledge Box.
   * 
   * Knowledge Box is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   * 
   * Knowledge Box is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with Knowledge Box.  If not, see <http://www.gnu.org/licenses/>.
   */
   
  
  /*
   * formatDateAsInConfig ()
   */
  function formatDateAsInConfig ($day, $month, $year, $format, $separator)
  {
    $format = $format->getStringValue ();
    $separator = $separator->getStringValue ();
    
    // day
    $format = str_replace ('dd', (string) $day, $format);
    $format = str_replace ('d', (int) $day, $format);

    // month
    $format = str_replace ('mm', (string) $month, $format);
    $format = str_replace ('m', (int) $month, $format);

    // year
    $format = str_replace ('yyyy', (int) $year, $format);
    $format = str_replace ('yy', substr ((string) $year, -2), $format);

    // separator
    $format = str_replace ('.', $separator, $format);

    // return
    return $format;
  }

  /*
   * unformatDateAsInConfig ()
   */
  function unformatDateAsInConfig ($date, $format, $separator)
  {
    $format = $format->getStringValue ();
    $separator = $separator->getStringValue ();
    
    // parts
    $parts = explode ($separator, $date);

    // format
    $format = explode ('.', $format);

    // position of information
    foreach ($format as $pos => $value)
    {
      // day
      if (substr ($value, 0, 1) == 'd')
        $day = $parts [$pos];
      
      // month
      elseif (substr ($value, 0, 1) == 'm')
        $month = $parts [$pos];
      
      // year
      elseif (substr ($value, 0, 1) == 'y')
        $year = $parts [$pos];
    }
    
    // format
    if ((int) $day < 10)
      $day = '0' . (int) $day;
    if ((int) $month < 10)
      $month = '0' . (int) $month;
    if ((int) $year < 10)
      $year = '0' . (int) $year;
    if ((int) $year >= 50 && (int) $year <= 99)
      $year = '19' . $year;
    elseif ((int) $year >= 0 && (int) $year < 50)
      $year = '20' . $year;
    
    // return
    return (string) $year . (string) $month . (string) $day;
  }

?>