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<?php defined('SYSPATH') or die('No direct script access.');
/**
* Inflector helper class.
*
* $Id: inflector.php 1970 2008-02-06 21:54:29Z Shadowhand $
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class inflector {

/**
* Checks if a word is defined as uncountable.
*
* @param string word to check
* @return boolean
*/
public static function uncountable($str)
{
static $uncountables = NULL;

if ($uncountables === NULL)
{
// Makes a mirrored array, eg: foo => foo
$uncountables = array_flip(Kohana::lang('inflector'));
}

return isset($uncountables[$str]);
}

/**
* Makes a plural word singular.
*
* @param string word to singularize
* @return string
*/
public static function singular($str, $count = NULL)
{
static $cache;

$str = trim($str);

// Cache key name
$key = $str.$count;

// We can just return uncountable words
if (inflector::uncountable($str))
return $str;

if (is_string($count) AND ctype_digit($count))
{
// Convert to integer when using a digit string
$count = (int) $count;
}

if ($cache === NULL)
{
// Initialize the cache
$cache = array();
}
else
{
// Already pluralized
if (isset($cache[$key]))
return $cache[$key];
}

// Do nothing with a single count
if (is_int($count) AND $count === 0 OR $count > 1)
return $str;

$end = substr($str, -3);

if ($end == 'ies')
{
$str = substr($str, 0, strlen($str) - 3).'y';
}
elseif ($end == 'ses' OR $end == 'zes' OR $end == 'xes')
{
$str = substr($str, 0, strlen($str) - 2);
}
elseif (substr($str, -1) == 's')
{
$str = substr($str, 0, strlen($str) - 1);
}

return $cache[$key] = $str;
}

/**
* Makes a singular word plural.
*
* @param string word to pluralize
* @return string
*/
public static function plural($str, $count = NULL)
{
static $cache;

$str = trim($str);

// Cache key name
$key = $str.$count;

// We can just return uncountable words
if (inflector::uncountable($str))
return $str;

if (is_string($count) AND ctype_digit($count))
{
// Convert to integer when using a digit string
$count = (int) $count;
}

if ($cache === NULL)
{
// Initialize the cache
$cache = array();
}
else
{
// Already pluralized
if (isset($cache[$key]))
return $cache[$key];
}

// If the count is one, do not pluralize
if ($count === 1)
return $str;

$end = substr($str, -1);
$low = (strcmp($end, strtolower($end)) === 0) ? TRUE : FALSE;

if (preg_match('/[sxz]$/i', $str) OR preg_match('/[^aeioudgkprt]h$/i', $str))
{
$end = 'es';
$str .= ($low == FALSE) ? strtoupper($end) : $end;
}
elseif (preg_match('/[^aeiou]y$/i', $str))
{
$end = 'ies';
$end = ($low == FALSE) ? strtoupper($end) : $end;
$str = substr_replace($str, $end, -1);
}
else
{
$end = 's';
$str .= ($low == FALSE) ? strtoupper($end) : $end;
}

// Set the cache and return
return $cache[$key] = $str;
}

/**
* Makes a phrase camel case.
*
* @param string phrase to camelize
* @return string
*/
public static function camelize($str)
{
$str = 'x'.strtolower(trim($str));
$str = ucwords(preg_replace('/[\s_]+/', ' ', $str));

return substr(str_replace(' ', '', $str), 1);
}

/**
* Makes a phrase underscored instead of spaced.
*
* @param string phrase to underscore
* @return string
*/
public static function underscore($str)
{
return preg_replace('/\s+/', '_', trim($str));
}

/**
* Makes an underscored or dashed phrase human-reable.
*
* @param string phrase to make human-reable
* @return string
*/
public static function humanize($str)
{
return preg_replace('/[_-]+/', ' ', trim($str));
}

} // End inflector
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