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<?php
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// +-----------------------------------------------------------------------+
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// | PhpWebGallery - a PHP based picture gallery                           |
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// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
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// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
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// +-----------------------------------------------------------------------+
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// | branch        : BSF (Best So Far)
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// | file          : $RCSfile: functions_metadata.inc.php,v $
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// | last update   : $Date: 2005/01/07 23:10:51 $
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// | last modifier : $Author: plg $
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// | revision      : $Revision: 1.4 $
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// +-----------------------------------------------------------------------+
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// | This program is free software; you can redistribute it and/or modify  |
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// | it under the terms of the GNU General Public License as published by  |
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// | the Free Software Foundation                                          |
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// |                                                                       |
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// | This program is distributed in the hope that it will be useful, but   |
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// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
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// | General Public License for more details.                              |
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// |                                                                       |
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// | You should have received a copy of the GNU General Public License     |
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// | along with this program; if not, write to the Free Software           |
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// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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// | USA.                                                                  |
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// +-----------------------------------------------------------------------+
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/**
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 * returns informations from IPTC metadata, mapping is done at the beginning
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 * of the function
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 *
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 * @param string $filename
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 * @return array
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 */
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function get_iptc_data($filename, $map)
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{
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  $result = array();
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  // Read IPTC data
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  $iptc = array();
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  $imginfo = array();
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  getimagesize($filename, $imginfo);
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  if (isset($imginfo['APP13']))
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  {
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    $iptc = iptcparse($imginfo['APP13']);
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    if (is_array($iptc))
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    {
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      $rmap = array_flip($map);
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      foreach (array_keys($rmap) as $iptc_key)
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      {
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        if (isset($iptc[$iptc_key][0]))
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        {
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          if ($iptc_key == '2#025')
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          {
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            $value = implode(',',
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                             array_map('clean_iptc_value',$iptc[$iptc_key]));
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          }
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          else
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          {
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            $value = clean_iptc_value($iptc[$iptc_key][0]);
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          }
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          foreach (array_keys($map, $iptc_key) as $pwg_key)
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          {
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            $result[$pwg_key] = $value;
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          }
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        }
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      }
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    }
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  }
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  return $result;
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}
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/**
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 * return a cleaned IPTC value
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 *
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 * @param string value
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 * @return string
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 */
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function clean_iptc_value($value)
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{
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  // strip leading zeros (weird Kodak Scanner software)
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  while ($value[0] == chr(0))
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  {
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    $value = substr($value, 1);
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  }
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  // remove binary nulls
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  $value = str_replace(chr(0x00), ' ', $value);
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  return $value;
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}
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?>