<?php

// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery                                  |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2009 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | 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.                                                                  |
// +-----------------------------------------------------------------------+

// Keeps file coded in UTF-8 without BOM : é

if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

global $ec_conf, $page, $ec_conf_index, $ec_conf_default,
       $ec_conf_possible_values;

// $ec_conf initalization

// $ec_conf has numeric indexes (instead of string keys like 'activated',
// 'howto'...) because of its first reading, done with the "explode" function.
// It would be  very easy to build a string keys indexed array, thanks to
// following instructions :
/*
$t = pwg_db_fetch_row(pwg_query("
  SELECT `value`
  FROM `".CONFIG_TABLE."`
  WHERE `param` = 'event_cats';
"));
$ec_conf_temp = explode(',', $t[0]);
$ec_conf = array(); $i = 0;
foreach ($ec_conf_default as $k => $v) $ec_conf[$k] = ec_conf_temp[$i++];
*/
// Though, I prefer to keep $ec_conf with numeric indexes, so to be compelled
// to go through function change_ec_conf() to modify ec_conf, and thus update
// the DB at the same time.

//----------------------------------------------------------------------------
// The following lines allow to change the number of configuration items, the
// default values they can have, and also their possible other values, very
// quickly.

// Gives configuration items names and default values. Only strings.
$ec_conf_default = array( // PLUGIN CONFIGURATION ($ec_conf) :
                          // ---------------------------------
  'activated'             // plugin activated, 0 or 1
    => '0',               // 
                          // 
  'howto'                 // whether the small aknowledgement message has
    => '0',               // already been displayed, 0 or 1
                          // 
  'dup_allow'             // duplication allowance :
    => '2',               //   0 : no account ;
                          //   1 : all accounts ;
                          //   2 : specified by group and user ids ;
                          // 
  'duplic_display'        // duplication link display in the menubar :
    => '2',               //   0 : "Register" for everybody ;
                          //   1 : "Duplicate" for everybody ;
                          //   2 : "Register" only for generic accounts,
                          //       "Duplicate" for all other accounts ;
                          // 
  'auto_code_dg_nb'       // number of digits when creating a new code
    => '10',              // automatically, several values
                          // 
  'unknown_code'          // what to do in case an unknown code is used with
    => '1',               // "autolog" parameter :
                          //   0 : nothing (display home page, index.php (not
                          //       logged in of course)) ;
                          //   1 : display "access denied" page ;
                          //   2 : display an Additional Page precised below.
                          // 
  'unknown_code_ap_id'    // the id of the Additional Page which must be used
    => '0',               // in case of usage of an unknow code, several vals.
                          // 
  'comment_display'       // the way the comment is displayed in "entries"
    => '1',               // tab : 0, as tooltip ; 1, on a line under code
                          // 
  'in_help_display'       // whether the help banner is displayed.
    => '1',               // 0: not displayed ; 1 : displayed (surprising !)
                          // 
  'display_connection'    // whether the "Connection" link must be displayed
    => '0',               // for generic users, 0 or 1.
);

// Gives possible values. In case values cannot be predicted, just provide an
// empty array : array() .
$ec_conf_possible_values = array(
  'activated'          => array('0', '1'),
  'howto'              => array('0', '1'),
  'dup_allow'          => array('0', '1', '2'),
  'duplic_display'     => array('0', '1', '2'),
  'auto_code_dg_nb'    => array( '4',  '5',  '8', '10', '12', '15',
                                '16', '20', '24', '25', '30', '32'),
  'unknown_code'       => array('0', '1', '2'),
  'unknown_code_ap_id' => array(),
  'comment_display'    => array('0', '1'),
  'in_help_display'    => array('0', '1'),
  'display_connection' => array('0', '1'),
);

// Once these lines have been updated, you don't need to change anything
// else. Everything is managed by the code ; the only effect being that
// existing configuration values in the DB are reset to their default
// values -- normally not a harmful effect.
//----------------------------------------------------------------------------

$ec_conf_index = array_flip(array_keys($ec_conf_default));

$t = array(); $u = '0'; $v = false;
$r = pwg_query("
  SELECT `value`
  FROM `".CONFIG_TABLE."`
  WHERE `param` = 'event_cats';
");
if (pwg_db_num_rows($r)) {
  $t = pwg_db_fetch_row($r);
  $v = (count($ec_conf = explode(',', $t[0])) == count($ec_conf_index));
  $u = $ec_conf[0];
}
// $v is false
//   _ if the entry in the table doesn't exist ;
//   _ if the entry in the table exists, but its number of parameters is
//     different than the number of default parameters.
// $u is '0' if the plugin has not yet been activated, '1' if it has been.
if (!$v) {
  $ec_conf = array_values($ec_conf_default);
  change_ec_conf('activated', $u); // writes in the DB
}
// now :
//   _ the number of parameters is the same in the DB as the number of
//     default parameters ;
//   _ the parameters have the default values if needed ;
//   _ the plugin shows it is active if it is the case.
unset($t, $u, $v);

/*
 * change_ec_conf($c, $v)
 * updates Event Cats configuration values in the database as well as in
 * $ec_conf.
 *
 * @param
 *   $c : conf value to update ;
 *   $v : value to give to $ec_conf[$c].
 * @return
 *   true or false whether the change was OK or not
 */
function change_ec_conf($c, $v) {
  global $ec_conf, $page, $ec_conf_index, $ec_conf_possible_values;
  if (array_key_exists($c, $ec_conf_index)) {
    if (
      count($ec_conf_possible_values[$c]) == 0 or
      in_array($v, $ec_conf_possible_values[$c])
    ) {
      $ec_conf[$ec_conf_index[$c]] = $v;
      return (pwg_query("
        UPDATE `".CONFIG_TABLE."`
        SET `value` = \"".implode(',', $ec_conf)."\"
        WHERE `param` = 'event_cats';
      ") !== false);
    }
    else {
      $page['errors'][] = 'Bad change_ec_conf value';
      return false;
    }
  }
  else {
    $page['errors'][] = 'Bad change_ec_conf index';
    return false;
  }
}

/*
 * read_ec_conf($c)
 * returns the value in $ec_conf using string keys.
 *
 * @param
 *   $c : conf value to update ;
 * @return
 *   $ec_conf value
 */
function read_ec_conf($c) {
  global $ec_conf, $page, $ec_conf_index;
  if (array_key_exists($c, $ec_conf_index))
   return $ec_conf[$ec_conf_index[$c]];
  else {
    $page['errors'][] = 'Bad read_ec_conf index';
    return false;
  }
}

?>