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<?php

// +-----------------------------------------------------------------------+

// | PhpWebGallery - a PHP based picture gallery                           |

// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |

// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |

// +-----------------------------------------------------------------------+

// | branch        : BSF (Best So Far)

// | file          : $RCSfile: functions.inc.php,v $

// | last update   : $Date: 2005/05/02 20:44:27 $

// | last modifier : $Author: plg $

// | revision      : $Revision: 1.55.2.1 $

// +-----------------------------------------------------------------------+

// | This program 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                                          |

// |                                                                       |

// | This program 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 this program; if not, write to the Free Software           |

// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |

// | USA.                                                                  |

// +-----------------------------------------------------------------------+

include_once( PHPWG_ROOT_PATH .'include/functions_user.inc.php' );

include_once( PHPWG_ROOT_PATH .'include/functions_session.inc.php' );

include_once( PHPWG_ROOT_PATH .'include/functions_category.inc.php' );

include_once( PHPWG_ROOT_PATH .'include/functions_xml.inc.php' );

include_once( PHPWG_ROOT_PATH .'include/functions_group.inc.php' );

include_once( PHPWG_ROOT_PATH .'include/functions_html.inc.php' );

//----------------------------------------------------------- generic functions

// get_boolean transforms a string to a boolean value. If the string is

// "false" (case insensitive), then the boolean value false is returned. In

// any other case, true is returned.

function get_boolean( $string )

{

  $boolean = true;

  if ( preg_match( '/^false$/i', $string ) )

  {

    $boolean = false;

  }

  return $boolean;

}

/**

 * returns boolean string 'true' or 'false' if the given var is boolean

 *

 * @param mixed $var

 * @return mixed

 */

function boolean_to_string($var)

{

  if (is_bool($var))

  {

    if ($var)

    {

      return 'true';

    }

    else

    {

      return 'false';

    }

  }

  else

  {

    return $var;

  }

}

// array_remove removes a value from the given array if the value existed in

// this array.

function array_remove( $array, $value )

{

  $output = array();

  foreach ( $array as $v ) {

    if ( $v != $value ) array_push( $output, $v );

  }

  return $output;

}

// The function get_moment returns a float value coresponding to the number

// of seconds since the unix epoch (1st January 1970) and the microseconds

// are precised : e.g. 1052343429.89276600

function get_moment()

{

  $t1 = explode( ' ', microtime() );

  $t2 = explode( '.', $t1[0] );

  $t2 = $t1[1].'.'.$t2[1];

  return $t2;

}

// The function get_elapsed_time returns the number of seconds (with 3

// decimals precision) between the start time and the end time given.

function get_elapsed_time( $start, $end )

{

  return number_format( $end - $start, 3, '.', ' ').' s';

}

// - The replace_space function replaces space and '-' characters

//   by their HTML equivalent  &nbsb; and −

// - The function does not replace characters in HTML tags

// - This function was created because IE5 does not respect the

//   CSS "white-space: nowrap;" property unless space and minus

//   characters are replaced like this function does.

// - Example :

//                 <div class="foo">My friend</div>

//               ( 01234567891111111111222222222233 )

//               (           0123456789012345678901 )

// becomes :

//             <div class="foo">My&nbsp;friend</div>

function replace_space( $string )

{

  //return $string;

  $return_string = '';

  // $remaining is the rest of the string where to replace spaces characters

  $remaining = $string;

  // $start represents the position of the next '<' character

  // $end   represents the position of the next '>' character

  $start = 0;

  $end = 0;

  $start = strpos ( $remaining, '<' ); // -> 0

  $end   = strpos ( $remaining, '>' ); // -> 16

  // as long as a '<' and his friend '>' are found, we loop

  while ( is_numeric( $start ) and is_numeric( $end ) )

  {

    // $treatment is the part of the string to treat

    // In the first loop of our example, this variable is empty, but in the

    // second loop, it equals 'My friend'

    $treatment = substr ( $remaining, 0, $start );

    // Replacement of ' ' by his equivalent ' '

    $treatment = str_replace( ' ', ' ', $treatment );

    $treatment = str_replace( '-', '−', $treatment );

    // composing the string to return by adding the treated string and the

    // following HTML tag -> 'My&nbsp;friend</div>'

    $return_string.= $treatment.substr( $remaining, $start, $end-$start+1 );

    // the remaining string is deplaced to the part after the '>' of this

    // loop

    $remaining = substr ( $remaining, $end + 1, strlen( $remaining ) );

    $start = strpos ( $remaining, '<' );

    $end   = strpos ( $remaining, '>' );

  }

  $treatment = str_replace( ' ', ' ', $remaining );

  $treatment = str_replace( '-', '−', $treatment );

  $return_string.= $treatment;

  return $return_string;

}

// get_extension returns the part of the string after the last "."

function get_extension( $filename )

{

  return substr( strrchr( $filename, '.' ), 1, strlen ( $filename ) );

}

// get_filename_wo_extension returns the part of the string before the last

// ".".

// get_filename_wo_extension( 'test.tar.gz' ) -> 'test.tar'

function get_filename_wo_extension( $filename )

{

  return substr( $filename, 0, strrpos( $filename, '.' ) );

}

/**

 * returns an array contening sub-directories, excluding "CVS"

 *

 * @param string $dir

 * @return array

 */

function get_dirs($directory)

{

  $sub_dirs = array();

  if ($opendir = opendir($directory))

  {

    while ($file = readdir($opendir))

    {

      if ($file != '.'

          and $file != '..'

          and is_dir($directory.'/'.$file)

          and $file != 'CVS')

      {

        array_push($sub_dirs, $file);

      }

    }

  }

  return $sub_dirs;

}

// The get_picture_size function return an array containing :

//      - $picture_size[0] : final width

//      - $picture_size[1] : final height

// The final dimensions are calculated thanks to the original dimensions and

// the maximum dimensions given in parameters.  get_picture_size respects

// the width/height ratio

function get_picture_size( $original_width, $original_height,

                           $max_width, $max_height )

{

  $width = $original_width;

  $height = $original_height;

  $is_original_size = true;

  if ( $max_width != "" )

  {

    if ( $original_width > $max_width )

    {

      $width = $max_width;

      $height = floor( ( $width * $original_height ) / $original_width );

    }

  }

  if ( $max_height != "" )

  {

    if ( $original_height > $max_height )

    {

      $height = $max_height;

      $width = floor( ( $height * $original_width ) / $original_height );

      $is_original_size = false;

    }

  }

  if ( is_numeric( $max_width ) and is_numeric( $max_height )

       and $max_width != 0 and $max_height != 0 )

  {

    $ratioWidth = $original_width / $max_width;

    $ratioHeight = $original_height / $max_height;

    if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) )

    {

      if ( $ratioWidth < $ratioHeight )

      { 

        $width = floor( $original_width / $ratioHeight );

        $height = $max_height;

      }

      else

      { 

        $width = $max_width; 

        $height = floor( $original_height / $ratioWidth );

      }

      $is_original_size = false;

    }

  }

  $picture_size = array();

  $picture_size[0] = $width;

  $picture_size[1] = $height;

  return $picture_size;

}

//-------------------------------------------- PhpWebGallery specific functions

/**

 * returns an array with a list of {language_code => language_name}

 *

 * @returns array

 */

function get_languages()

{

  $dir = opendir(PHPWG_ROOT_PATH.'language');

  $languages = array();

  while ($file = readdir($dir))

  {

    $path = PHPWG_ROOT_PATH.'language/'.$file;

    if (is_dir($path) and !is_link($path) and file_exists($path.'/iso.txt'))

    {

      list($language_name) = @file($path.'/iso.txt');

      $languages[$file] = $language_name;

    }

  }

  closedir($dir);

  @asort($languages);

  @reset($languages);

  return $languages;

}

/**

 * replaces the $search into <span style="$style">$search</span> in the

 * given $string.

 *

 * case insensitive replacements, does not replace characters in HTML tags

 *

 * @param string $string

 * @param string $search

 * @param string $style

 * @return string

 */

function add_style( $string, $search, $style )

{

  //return $string;

  $return_string = '';

  $remaining = $string;

  $start = 0;

  $end = 0;

  $start = strpos ( $remaining, '<' );

  $end   = strpos ( $remaining, '>' );

  while ( is_numeric( $start ) and is_numeric( $end ) )

  {

    $treatment = substr ( $remaining, 0, $start );

    $treatment = preg_replace( '/('.$search.')/i',

                               '<span style="'.$style.'">\\0</span>',

                               $treatment );

    $return_string.= $treatment.substr( $remaining, $start, $end-$start+1 );

    $remaining = substr ( $remaining, $end + 1, strlen( $remaining ) );

    $start = strpos ( $remaining, '<' );

    $end   = strpos ( $remaining, '>' );

  }

  $treatment = preg_replace( '/('.$search.')/i',

                             '<span style="'.$style.'">\\0</span>',

                             $remaining );

  $return_string.= $treatment;

  return $return_string;

}

// replace_search replaces a searched words array string by the search in

// another style for the given $string.

function replace_search( $string, $search )

{

  // FIXME : with new advanced search, this function needs a rewrite

  return $string;

  $words = explode( ',', $search );

  $style = 'background-color:white;color:red;';

  foreach ( $words as $word ) {

    $string = add_style( $string, $word, $style );

  }

  return $string;

}

function pwg_log( $file, $category, $picture = '' )

{

  global $conf, $user;

  if ($conf['log'])

  {

    $query = '

INSERT INTO '.HISTORY_TABLE.'

  (date,login,IP,file,category,picture)

  VALUES

  (NOW(),

  \''.(($user['id'] == 2) ? 'guest' : addslashes($user['username'])).'\',

  \''.$_SERVER['REMOTE_ADDR'].'\',

  \''.addslashes($file).'\',

  \''.addslashes($category).'\',

  \''.addslashes($picture).'\')

;';

    pwg_query($query);

  }

}

// format_date returns a formatted date for display. The date given in

// argument can be a unixdate (number of seconds since the 01.01.1970) or an

// american format (2003-09-15). By option, you can show the time. The

// output is internationalized.

//

// format_date( "2003-09-15", 'us', true ) -> "Monday 15 September 2003 21:52"

function format_date($date, $type = 'us', $show_time = false)

{

  global $lang;

  list($year,$month,$day,$hour,$minute,$second) = array(0,0,0,0,0,0);

  switch ( $type )

  {

    case 'us' :

    {

      list($year,$month,$day) = explode('-', $date);

      break;

    }

    case 'unix' :

    {

      list($year,$month,$day,$hour,$minute) =

        explode('.', date('Y.n.j.G.i', $date));

      break;

    }

    case 'mysql_datetime' :

    {

      preg_match('/^(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})$/',

                 $date, $out);

      list($year,$month,$day,$hour,$minute,$second) =

        array($out[1],$out[2],$out[3],$out[4],$out[5],$out[6]);

      break;

    }

  }

  $formated_date = '';

  // before 1970, Microsoft Windows can't mktime

  if ($year >= 1970)

  {

    // we ask midday because Windows think it's prior to midnight with a

    // zero and refuse to work

    $formated_date.= $lang['day'][date('w', mktime(12,0,0,$month,$day,$year))];

  }

  $formated_date.= ' '.$day;

  $formated_date.= ' '.$lang['month'][(int)$month];

  $formated_date.= ' '.$year;

  if ($show_time)

  {

    $formated_date.= ' '.$hour.':'.$minute;

  }

  return $formated_date;

}

// notify sends a email to every admin of the gallery

function notify( $type, $infos = '' )

{

  global $conf;

  $headers = 'From: <'.$conf['mail_webmaster'].'>'."\n";

  $headers.= 'Reply-To: '.$conf['mail_webmaster']."\n";

  $headers.= 'X-Mailer: PhpWebGallery, PHP '.phpversion();

  $options = '-f '.$conf['mail_webmaster'];

  // retrieving all administrators

  $query = 'SELECT username,mail_address,language';

  $query.= ' FROM '.USERS_TABLE;

  $query.= " WHERE status = 'admin'";

  $query.= ' AND mail_address IS NOT NULL';

  $query.= ';';

  $result = pwg_query( $query );

  while ( $row = mysql_fetch_array( $result ) )

  {

    $to = $row['mail_address'];

    include( PHPWG_ROOT_PATH.'language/'.$row['language'].'/common.lang.php' );

    $content = $lang['mail_hello']."\n\n";

    switch ( $type )

    {

    case 'upload' :

      $subject = $lang['mail_new_upload_subject'];

      $content.= $lang['mail_new_upload_content'];

      break;

    case 'comment' :

      $subject = $lang['mail_new_comment_subject'];

      $content.= $lang['mail_new_comment_content'];

      break;

    }

    $infos = str_replace( ' ',  ' ', $infos );

    $infos = str_replace( '−', '-', $infos );

    $content.= "\n\n".$infos;

    $content.= "\n\n-- \nPhpWebGallery ".PHPWG_VERSION;

    $content = wordwrap( $content, 72 );

    @mail( $to, $subject, $content, $headers, $options );

  }

}

function pwg_write_debug()

{

  global $debug;

  $fp = @fopen( './log/debug.log', 'a+' );

  fwrite( $fp, "\n\n" );

  fwrite( $fp, $debug );

  fclose( $fp );

}

function pwg_query($query)

{

  global $conf,$page;

  $start = get_moment();

  $result = mysql_query($query) or my_error($query."\n");

  $time = get_moment() - $start;

  if (!isset($page['count_queries']))

  {

    $page['count_queries'] = 0;

    $page['queries_time'] = 0;

  }

  $page['count_queries']++;

  $page['queries_time']+= $time;

  if ($conf['show_queries'])

  {

    $output = '';

    $output.= '<pre>['.$page['count_queries'].'] ';

    $output.= "\n".$query;

    $output.= "\n".'(this query time : ';

    $output.= number_format($time, 3, '.', ' ').' s)</b>';

    $output.= "\n".'(total SQL time  : ';

    $output.= number_format($page['queries_time'], 3, '.', ' ').' s)';

    $output.= '</pre>';

    echo $output;

  }

  return $result;

}

function pwg_debug( $string )

{

  global $debug,$t2,$count_queries;

  $now = explode( ' ', microtime() );

  $now2 = explode( '.', $now[0] );

  $now2 = $now[1].'.'.$now2[1];

  $time = number_format( $now2 - $t2, 3, '.', ' ').' s';

  $debug.= '['.$time.', ';

  $debug.= $count_queries.' queries] : '.$string;

  $debug.= "\n";

}

/**

 * Redirects to the given URL

 *

 * Note : once this function called, the execution doesn't go further

 * (presence of an exit() instruction.

 *

 * @param string $url

 * @return void

 */

function redirect( $url )

{

  global $user, $template, $lang_info, $conf, $lang, $t2, $page;

  // $refresh, $url_link and $title are required for creating an automated

  // refresh page in header.tpl

  $refresh = 0;

  $url_link = $url;

  $title = 'redirection';

  include( PHPWG_ROOT_PATH.'include/page_header.php' );

  $template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );

  $template->parse('redirect');

  include( PHPWG_ROOT_PATH.'include/page_tail.php' );

  exit();

}

/**

 * returns $_SERVER['QUERY_STRING'] whitout keys given in parameters

 *

 * @param array $rejects

 * @returns string

 */

function get_query_string_diff($rejects = array())

{

  $query_string = '';

  $str = $_SERVER['QUERY_STRING'];

  parse_str($str, $vars);

  $is_first = true;

  foreach ($vars as $key => $value)

  {

    if (!in_array($key, $rejects))

    {

      if ($is_first)

      {

        $query_string.= '?';

        $is_first = false;

      }

      else

      {

        $query_string.= '&';

      }

      $query_string.= $key.'='.$value;

    }

  }

  return $query_string;

}

/**

 * returns available templates

 */

function get_templates()

{

  return get_dirs(PHPWG_ROOT_PATH.'template');

}

/**

 * returns thumbnail filepath (or distant URL if thumbnail is remote) for a

 * given element

 *

 * the returned string can represente the filepath of the thumbnail or the

 * filepath to the corresponding icon for non picture elements

 *

 * @param string path

 * @param string tn_ext

 * @return string

 */

function get_thumbnail_src($path, $tn_ext = '')

{

  global $conf, $user;

  if ($tn_ext != '')

  {

    $src = substr_replace(get_filename_wo_extension($path),

                          '/thumbnail/'.$conf['prefix_thumbnail'],

                          strrpos($path,'/'),

                          1);

    $src.= '.'.$tn_ext;

  }

  else

  {

    $src = PHPWG_ROOT_PATH;

    $src.= 'template/'.$user['template'].'/mimetypes/';

    $src.= strtolower(get_extension($path)).'.png';

  }

  return $src;

}

// my_error returns (or send to standard output) the message concerning the

// error occured for the last mysql query.

function my_error($header)

{

  $error = '<pre>';

  $error.= $header;

  $error.= '[mysql error '.mysql_errno().'] ';

  $error.= mysql_error();

  $error.= '</pre>';

  die ($error);

}

?>