<?php
          // Keeps file coded in UTF-8 without BOM : é
include_once (LCAS_PATH.'include/constants.php');
load_language('plugin.lang', LCAS_PATH);


/**
 * Splits a multi-byte string in a array of each of its characters.
 * Many thanks to adjwilli in
 * http://www.php.net/manual/fr/function.mb-split.php#80046
 *
 * @param string s: string to split
 *
 * @return : array of each character of s
*/
function LCAS_mbStringToArray($s) {
  $l = mb_strlen($s); $a = array();
  while ($l) {
    $a[] = mb_substr($s, 0, 1, 'UTF-8');
    $s = mb_substr($s, 1, $l, 'UTF-8');
    $l = mb_strlen($s);
  }
  return $a;
}


/**
 * Changes the characters of the given string as stated by values of
 * $conf['insensitive_case_logon'] and $conf['LCAS_replacement_set'].
 *
 * @param mix s: string
 *
 * @return : string modified as stated
*/
function LCAS_change_case($Username, $Opt)
{
  global $conf;
  
  if ($Opt == '0' and !isset($conf['LCAS_replacement_set'][0]))
   return $Username;
  if ($Opt == '0') return $Username; // to be removed once rule 0 is done
  $Option = intval($Opt);
  if (!isset($Opt) or ($Option < 0) or ($Option > 3)) return $Username;
  
  include(LCAS_PATH.'include/LCAS_replacement_set.inc.php');

  // Build an array of characters that must be replaced
  // $rep_char is the replacement character ; $char_rep_arr is an array of 
  // characters which have to be replaced. ie :
  // if
  // $conf['LCAS_replacement_set'][$Option]['e'] ='é è'
  // then
  // $char_rep_arr['é'] = 'e' ; $char_rep_arr['è'] = 'e'.
  $char_rep_arr = array();
  foreach (
   $conf['LCAS_replacement_set'][$Option]
   as $rep_char => $char_rep_list
  ) {
    $t = explode(' ', $char_rep_list);
    foreach ($t as $c) $char_rep_arr[$c] = $rep_char;
  }
  
  // Replacement in each string of $Username of the characters
  // that needs to be replaced
  $t = LCAS_mbStringToArray($Username); $r ='';
  foreach ($t as $c) {
    if (array_key_exists($c, $char_rep_arr))
     $r.= $char_rep_arr[$c];
    else
     $r.= $c;
  }
  
  // Return of the result
  return $r;
}


/* Function called from LCAS_admin.php to send notification email */
function LCAS_SendMail($id, $username)
{
  global $conf;

  $conf_LCAS= unserialize($conf['LoginCaseAccentsSensitivity']);
  
	include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');

/* We have to get the user's language in database */
  $query ='
SELECT user_id, language
FROM '.USER_INFOS_TABLE.'
WHERE user_id = '.$id.'
;';
  $data = pwg_db_fetch_assoc(pwg_query($query));

/* Check if user is already registered (profile changing) - If not (new registration), language is set to current gallery language */
  if (empty($data))
  {
/* And switch gallery to this language before using personalized and multilangual contents */
    $language = pwg_get_session_var( 'lang_switch', $user['language'] );
    switch_lang_to($language);
  }
  else
  {
/* And switch gallery to this language before using personalized and multilangual contents */
    switch_lang_to($data['language']);
    load_language('plugin.lang', LCAS_PATH);
  }

  $subject = '['.$conf['gallery_title'].'] '.l10n_args(get_l10n_args('Username_updated_for_%s', stripslashes($username)));

  if (isset($conf_LCAS[2]) and $conf_LCAS[2] <> '')
  {
    if (function_exists('get_user_language_desc'))
    {
      $customtxt = get_user_language_desc($conf_LCAS[2])."\n\n";
    }
    else $customtxt = l10n($conf_LCAS[2])."\n\n"; 
  }

/* Send the email with subject and contents */
  pwg_mail($email, array(
    'subject' => $subject,
    'content' => ($customtxt),
  ));

/* Switching back to default language */
switch_lang_back();
}


/* Function called from LCAS_admin.php and main.inc.php to get the plugin version and name */
function LCAS_PluginInfos($dir)
{
  $path = $dir;

  $plg_data = implode( '', file($path.'main.inc.php') );
  if ( preg_match("|Plugin Name: (.*)|", $plg_data, $val) )
  {
    $plugin['name'] = trim( $val[1] );
  }
  if (preg_match("|Version: (.*)|", $plg_data, $val))
  {
    $plugin['version'] = trim($val[1]);
  }
  if ( preg_match("|Plugin URI: (.*)|", $plg_data, $val) )
  {
    $plugin['uri'] = trim($val[1]);
  }
  if ($desc = load_language('description.txt', $path.'/', array('return' => true)))
  {
    $plugin['description'] = trim($desc);
  }
  elseif ( preg_match("|Description: (.*)|", $plg_data, $val) )
  {
    $plugin['description'] = trim($val[1]);
  }
  if ( preg_match("|Author: (.*)|", $plg_data, $val) )
  {
    $plugin['author'] = trim($val[1]);
  }
  if ( preg_match("|Author URI: (.*)|", $plg_data, $val) )
  {
    $plugin['author uri'] = trim($val[1]);
  }
  if (!empty($plugin['uri']) and strpos($plugin['uri'] , 'extension_view.php?eid='))
  {
    list( , $extension) = explode('extension_view.php?eid=', $plugin['uri']);
    if (is_numeric($extension)) $plugin['extension'] = $extension;
  }
// IMPORTANT SECURITY !
  $plugin = array_map('htmlspecialchars', $plugin);

  return $plugin ;
}


// Tri les doublons
function CompareTransformedUser($a, $b)
{
	return strcmp($a['transformed'], $b['transformed']);
}


// Fonctionnel mais optimisable
function LCAS_GetDuplicates($source) {
	$users      = array();
	$duplicates = array();
	
	// Liste des utilisateurs uniques
	foreach($source as $user) {
		if (isset($users[$user['transformed']])) {
			$users[$user['transformed']] += 1;
		}
		else {
			$users[$user['transformed']] = 1;
		}
	}
	
	// On récupère les doublons
	foreach($source as $user) {
		if ($users[$user['transformed']] > 1) {
			array_push($duplicates, $user);
		}
	}
	
	// Trier le tableau
	usort($duplicates, 'CompareTransformedUser');
	
	return $duplicates;
}


/**
 * Retreive duplicate users according of case and or accent sensitivity
 * 
 * @param : $rule for LCAS_change_case())
 * 
 * @return : List of duplicate $username 
 * 
 */
function LCAS_get_user_list($rule)
{
	global $conf, $page;
  
  $users = array();

	/* search users depending expiration date */
  $query = '
SELECT DISTINCT u.'.$conf['user_fields']['id'].' AS id,
                u.'.$conf['user_fields']['username'].' AS username,
                u.'.$conf['user_fields']['email'].' AS email
FROM '.USERS_TABLE.' AS u
;';

	$result = pwg_query($query);
      
  while ($row = pwg_db_fetch_assoc($result))
  {
  	$user = $row;
  	$user['transformed'] = LCAS_change_case($user['username'], $rule, false); 
    array_push($users, $user);
	}

	return LCAS_GetDuplicates($users);
}


// Cleaning obsolete files at plugin upgrade
function LCAS_clean_obsolete_files()
{
  if (file_exists(LCAS_PATH.'obsolete.list')
    and $old_files = file(LCAS_PATH.'obsolete.list', FILE_IGNORE_NEW_LINES)
    and !empty($old_files))
  {
    array_push($old_files, 'obsolete.list');
    foreach($old_files as $old_file)
    {
      $path = LCAS_PATH.$old_file;
      if (is_file($path))
      {
        @unlink($path);
      }
    }
  }
}


/**
 * Function called from main.inc.php - For test on username case sensitivity
 * Have to be deleted before first release build
 * 
 * @param : $username typed in by user for identification
 * 
 * @return : $username found in database 
 * 
 */
function LCAS_SearchCaseUsername($username, $rule)
{
  global $conf;

  $username_c = LCAS_change_case($username, $rule);

  if (isset($username))
  {    
    $LCAS_users = array();
    
    $q = pwg_query("
      SELECT ".$conf['user_fields']['username']." AS username
      FROM `".USERS_TABLE."`;
    ");
    while ($r = pwg_db_fetch_assoc($q))
     $LCAS_users[$r['username']] =
      LCAS_change_case($r['username'], $rule);
     // $LCAS_users is now an associative table where the key is the account
     // as registered in the DB, and the value is this same account,
     // transformed as stated by $rule.

    $users_found = array_keys($LCAS_users, $username_c);
    // $users_found is now a table of which the values are all the accounts
    // which can be written as stated by $rule the same way as $username can
    if (count($users_found) != 1) // If ambiguous, don't allow transformed
     return $username;            // writing but normal writing will work
    else
     return $users_found[0];
  }
}


/*
 * str_from_var3($var)
 * returns a string easing array var informations displaying in Piwigo :
 *   _ the string return value starts with"<p style = "text-align:left;">" ;
 *   _ all "TAB" characters (chr(10)) are replaced by "<br>" ;
 *   _ all spaces are replaced by "&nbsp;".
 *
 * @param
 *   $var : variable to display
 * @return
 *   string easy to display in Piwigo
 */
function str_from_var3($var) {
  return
   '<p style = "text-align:left;">'.
   str_replace(
    chr(10),'<br>',
    str_replace(' ','&nbsp;', print_r /* var_dump */ ($var,true))
   ).
   '</p>';
}


// DebugLog function
function DebugLog($var1, $var2, $var3, $var4, $var5)
{
   $fo=fopen (LCAS_PATH.'admin/debuglog.txt','a') ;
   fwrite($fo,"======================\n") ;
   fwrite($fo,'le ' . date('D, d M Y H:i:s') . "\r\n");
   fwrite($fo, "\n" . $var1 . "\r\n") ;
   fwrite($fo, "\n" . $var2 . "\r\n") ;
   fwrite($fo, "\n" . $var3 . "\r\n") ;
   fwrite($fo, "\n" . $var4 . "\r\n") ;
   fwrite($fo, "\n" . $var5 . "\r\n") ;
   fclose($fo) ;
}
?>