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<?php
/**
* @version $Id$
* @package Koowa_Inflector
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
* @link http://www.nooku.org
*/
/**
* KInflector to pluralize and singularize English nouns.
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Inflector
* @static
*/
class KInflector
{
/**
* Rules for pluralizing and singularizing of nouns.
*
* @var array
*/
protected static $_rules = array
(
'pluralization' => array(
'/move$/i' => 'moves',
'/sex$/i' => 'sexes',
'/child$/i' => 'children',
'/man$/i' => 'men',
'/foot$/i' => 'feet',
'/person$/i' => 'people',
'/taxon$/i' => 'taxa',
'/(quiz)$/i' => '$1zes',
'/^(ox)$/i' => '$1en',
'/(m|l)ouse$/i' => '$1ice',
'/(matr|vert|ind|suff)ix|ex$/i'=> '$1ices',
'/(x|ch|ss|sh)$/i' => '$1es',
'/([^aeiouy]|qu)y$/i' => '$1ies',
'/(?:([^f])fe|([lr])f)$/i' => '$1$2ves',
'/sis$/i' => 'ses',
'/([ti]|addend)um$/i' => '$1a',
'/(alumn|formul)a$/i' => '$1ae',
'/(buffal|tomat|her)o$/i' => '$1oes',
'/(bu)s$/i' => '$1ses',
'/(alias|status)$/i' => '$1es',
'/(octop|vir)us$/i' => '$1i',
'/(gen)us$/i' => '$1era',
'/(ax|test)is$/i' => '$1es',
'/s$/i' => 's',
'/$/' => 's',
),
'singularization' => array(
'/cookies$/i' => 'cookie',
'/moves$/i' => 'move',
'/sexes$/i' => 'sex',
'/children$/i' => 'child',
'/men$/i' => 'man',
'/feet$/i' => 'foot',
'/people$/i' => 'person',
'/taxa$/i' => 'taxon',
'/databases$/i' => 'database',
'/(quiz)zes$/i' => '\1',
'/(matr|suff)ices$/i' => '\1ix',
'/(vert|ind)ices$/i' => '\1ex',
'/^(ox)en/i' => '\1',
'/(alias|status)es$/i' => '\1',
'/(alias|status)$/i' => '\1',
'/(tomato|hero|buffalo)es$/i' => '\1',
'/([octop|vir])i$/i' => '\1us',
'/(gen)era$/i' => '\1us',
'/(cris|^ax|test)es$/i' => '\1is',
'/(shoe)s$/i' => '\1',
'/(o)es$/i' => '\1',
'/(bus)es$/i' => '\1',
'/([m|l])ice$/i' => '\1ouse',
'/(x|ch|ss|sh)es$/i' => '\1',
'/(m)ovies$/i' => '\1ovie',
'/(s)eries$/i' => '\1eries',
'/([^aeiouy]|qu)ies$/i' => '\1y',
'/([lr])ves$/i' => '\1f',
'/(tive)s$/i' => '\1',
'/(hive)s$/i' => '\1',
'/([^f])ves$/i' => '\1fe',
'/(^analy)ses$/i' => '\1sis',
'/((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$/i' => '\1\2sis',
'/([ti]|addend)a$/i' => '\1um',
'/(alumn|formul)ae$/i' => '$1a',
'/(n)ews$/i' => '\1ews',
'/(.*)ss$/i' => '\1ss',
'/(.*)s$/i' => '\1',
),
'countable' => array(
'aircraft',
'cannon',
'deer',
'equipment',
'fish',
'information',
'money',
'moose',
'rice',
'series',
'sheep',
'species',
'swine',
)
);
/**
* Cache of pluralized and singularized nouns.
*
* @var array
*/
protected static $_cache = array(
'singularized' => array(),
'pluralized' => array()
);
/**
* Constructor
*
* Prevent creating instances of this class by making the contructor private
*/
private function __construct() {}
/**
* Add a word to the cache, useful to make exceptions or to add words in
* other languages
*
* @param string Singular word
* @param string Plural word
*/
public static function addWord($singular, $plural)
{
self::$_cache['pluralized'][$singular] = $plural;
self::$_cache['singularized'][$plural] = $singular;
self::$_cache['singularized'][$singular] = $singular;
self::$_cache['pluralized'][$plural] = $plural;
}
/**
* Singular English word to plural.
*
* @param string Word to pluralize
* @return string Plural noun
*/
public static function pluralize($word)
{
//Make sure we have the singular
$word = self::singularize($word);
//Get the cached noun of it exists
if(isset(self::$_cache['pluralized'][$word])) {
return self::$_cache['pluralized'][$word];
}
//Create the plural noun
if (in_array($word, self::$_rules['countable'])) {
$_cache['pluralized'][$word] = $word;
return $word;
}
foreach (self::$_rules['pluralization'] as $regexp => $replacement)
{
$matches = null;
$plural = preg_replace($regexp, $replacement, $word, -1, $matches);
if ($matches > 0) {
$_cache['pluralized'][$word] = $plural;
return $plural;
}
}
return $word;
}
/**
* Plural English word to singular.
*
* @param string Word to singularize.
* @return string Singular noun
*/
public static function singularize($word)
{
//Get the cached noun of it exists
if(isset(self::$_cache['singularized'][$word])) {
return self::$_cache['singularized'][$word];
}
//Create the singular noun
if (in_array($word, self::$_rules['countable'])) {
$_cache['singularized'][$word] = $word;
return $word;
}
foreach (self::$_rules['singularization'] as $regexp => $replacement)
{
$matches = null;
$singular = preg_replace($regexp, $replacement, $word, -1, $matches);
if ($matches > 0) {
$_cache['singularized'][$word] = $singular;
return $singular;
}
}
return $word;
}
/**
* Returns given word as CamelCased
*
* Converts a word like "foo_bar" or "foo bar" to "FooBar". It
* will remove non alphanumeric characters from the word, so
* "who's online" will be converted to "WhoSOnline"
*
* @param string $word Word to convert to camel case
* @return string UpperCamelCasedWord
*/
public static function camelize($word)
{
$word = preg_replace('/[^a-zA-Z0-9\s]/', ' ', $word);
$word = str_replace(' ', '', ucwords(strtolower(str_replace('_', ' ', $word))));
return $word;
}
/**
* Converts a word "into_it_s_underscored_version"
*
* Convert any "CamelCased" or "ordinary Word" into an "underscored_word".
*
* @param string $word Word to underscore
* @return string Underscored word
*/
public static function underscore($word)
{
$word = preg_replace('/(\s)+/', '_', $word);
$word = strtolower(preg_replace('/(?<=\\w)([A-Z])/', '_\\1', $word));
return $word;
}
/**
* Convert any "CamelCased" word into an array of strings
*
* Returns an array of strings each of which is a substring of string formed
* by splitting it at the camelcased letters.
*
* @param string Word to explode
* @return array Array of strings
*/
public static function explode($word)
{
$result = explode('_', self::underscore($word));
return $result;
}
/**
* Convert an array of strings into a "CamelCased" word
*
* @param array $words Array to implode
* @return string UpperCamelCasedWord
*/
public static function implode($words)
{
$result = self::camelize(implode('_', $words));
return $result;
}
/**
* Returns a human-readable string from $word
*
* Returns a human-readable string from $word, by replacing
* underscores with a space, and by upper-casing the initial
* character by default.
*
* @param string $word String to "humanize"
* @return string Human-readable word
*/
public static function humanize($word)
{
$result = ucwords(strtolower(str_replace("_", " ", $word)));
return $result;
}
/**
* Converts a class name to its table name according to Koowa
* naming conventions.
*
* Converts "Person" to "people"
*
* @param string $className Class name for getting related table_name.
* @return string plural_table_name
* @see classify
*/
public static function tableize($className)
{
$result = self::underscore($className);
if(!self::isPlural($className)) {
$result = self::pluralize($result);
}
return $result;
}
/**
* Converts a table name to its class name according to Koowa
* naming conventions.
*
* Converts "people" to "Person"
*
* @see tableize
* @param string $table_name Table name for getting related ClassName.
* @return string SingularClassName
*/
public static function classify($tableName)
{
$result = self::camelize(self::singularize($tableName));
return $result;
}
/**
* Returns camelBacked version of a string.
*
* Same as camelize but first char is lowercased
*
* @param string $string
* @return string
* @see camelize
*/
public static function variablize($string)
{
$string = self::camelize(self::underscore($string));
$result = strtolower(substr($string, 0, 1));
$variable = preg_replace('/\\w/', $result, $string, 1);
return $variable;
}
/**
* Check to see if an English word is singular
*
* @param string $string The word to check
* @return boolean
*/
public static function isSingular($string)
{
// Check cache assuming the string is plural.
$singular = isset(self::$_cache['singularized'][$string]) ? self::$_cache['singularized'][$string] : null;
$plural = $singular && isset(self::$_cache['pluralized'][$singular]) ? self::$_cache['pluralized'][$singular] : null;
if($singular && $plural) {
return $plural != $string;
}
// If string is not in the cache, try to pluralize and singularize it.
return self::singularize(self::pluralize($string)) == $string;
}
/**
* Check to see if an Enlish word is plural
*
* @param string $string
* @return boolean
*/
public static function isPlural($string)
{
// Check cache assuming the string is singular.
$plural = isset(self::$_cache['pluralized'][$string]) ? self::$_cache['pluralized'][$string] : null;
$singular = $plural && isset(self::$_cache['singularized'][$plural]) ? self::$_cache['singularized'][$plural] : null;
if($plural && $singular) {
return $singular != $string;
}
// If string is not in the cache, try to singularize and pluralize it.
return self::pluralize(self::singularize($string)) == $string;
}
/**
* Gets a part of a CamelCased word by index
*
* Use a negative index to start at the last part of the word (-1 is the
* last part)
*
* @param string Word
* @param integer Index of the part
* @param string Default value
*/
public static function getPart($string, $index, $default = null)
{
$parts = self::explode($string);
if($index < 0) {
$index = count($parts) + $index;
}
return isset($parts[$index]) ? $parts[$index] : $default;
}
}
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