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khosb/includes/kohana/system/classes/Kohana/Inflector.php
2012-12-21 12:59:09 +11:00

270 lines
6.9 KiB
PHP

<?php defined('SYSPATH') OR die('No direct script access.');
/**
* Inflector helper class. Inflection is changing the form of a word based on
* the context it is used in. For example, changing a word into a plural form.
*
* [!!] Inflection is only tested with English, and is will not work with other languages.
*
* @package Kohana
* @category Helpers
* @author Kohana Team
* @copyright (c) 2007-2012 Kohana Team
* @license http://kohanaframework.org/license
*/
class Kohana_Inflector {
/**
* @var array cached inflections
*/
protected static $cache = array();
/**
* @var array uncountable words
*/
protected static $uncountable;
/**
* @var array irregular words
*/
protected static $irregular;
/**
* Checks if a word is defined as uncountable. An uncountable word has a
* single form. For instance, one "fish" and many "fish", not "fishes".
*
* Inflector::uncountable('fish'); // TRUE
* Inflector::uncountable('cat'); // FALSE
*
* If you find a word is being pluralized improperly, it has probably not
* been defined as uncountable in `config/inflector.php`. If this is the
* case, please report [an issue](http://dev.kohanaphp.com/projects/kohana3/issues).
*
* @param string $str word to check
* @return boolean
*/
public static function uncountable($str)
{
if (Inflector::$uncountable === NULL)
{
// Cache uncountables
Inflector::$uncountable = Kohana::$config->load('inflector')->uncountable;
// Make uncountables mirrored
Inflector::$uncountable = array_combine(Inflector::$uncountable, Inflector::$uncountable);
}
return isset(Inflector::$uncountable[strtolower($str)]);
}
/**
* Makes a plural word singular.
*
* echo Inflector::singular('cats'); // "cat"
* echo Inflector::singular('fish'); // "fish", uncountable
*
* You can also provide the count to make inflection more intelligent.
* In this case, it will only return the singular value if the count is
* greater than one and not zero.
*
* echo Inflector::singular('cats', 2); // "cats"
*
* [!!] Special inflections are defined in `config/inflector.php`.
*
* @param string $str word to singularize
* @param integer $count count of thing
* @return string
* @uses Inflector::uncountable
*/
public static function singular($str, $count = NULL)
{
// $count should always be a float
$count = ($count === NULL) ? 1.0 : (float) $count;
// Do nothing when $count is not 1
if ($count != 1)
return $str;
// Remove garbage
$str = strtolower(trim($str));
// Cache key name
$key = 'singular_'.$str.$count;
if (isset(Inflector::$cache[$key]))
return Inflector::$cache[$key];
if (Inflector::uncountable($str))
return Inflector::$cache[$key] = $str;
if (empty(Inflector::$irregular))
{
// Cache irregular words
Inflector::$irregular = Kohana::$config->load('inflector')->irregular;
}
if ($irregular = array_search($str, Inflector::$irregular))
{
$str = $irregular;
}
elseif (preg_match('/us$/', $str))
{
// http://en.wikipedia.org/wiki/Plural_form_of_words_ending_in_-us
// Already singular, do nothing
}
elseif (preg_match('/[sxz]es$/', $str) OR preg_match('/[^aeioudgkprt]hes$/', $str))
{
// Remove "es"
$str = substr($str, 0, -2);
}
elseif (preg_match('/[^aeiou]ies$/', $str))
{
// Replace "ies" with "y"
$str = substr($str, 0, -3).'y';
}
elseif (substr($str, -1) === 's' AND substr($str, -2) !== 'ss')
{
// Remove singular "s"
$str = substr($str, 0, -1);
}
return Inflector::$cache[$key] = $str;
}
/**
* Makes a singular word plural.
*
* echo Inflector::plural('fish'); // "fish", uncountable
* echo Inflector::plural('cat'); // "cats"
*
* You can also provide the count to make inflection more intelligent.
* In this case, it will only return the plural value if the count is
* not one.
*
* echo Inflector::singular('cats', 3); // "cats"
*
* [!!] Special inflections are defined in `config/inflector.php`.
*
* @param string $str word to pluralize
* @param integer $count count of thing
* @return string
* @uses Inflector::uncountable
*/
public static function plural($str, $count = NULL)
{
// $count should always be a float
$count = ($count === NULL) ? 0.0 : (float) $count;
// Do nothing with singular
if ($count == 1)
return $str;
// Remove garbage
$str = trim($str);
// Cache key name
$key = 'plural_'.$str.$count;
// Check uppercase
$is_uppercase = ctype_upper($str);
if (isset(Inflector::$cache[$key]))
return Inflector::$cache[$key];
if (Inflector::uncountable($str))
return Inflector::$cache[$key] = $str;
if (empty(Inflector::$irregular))
{
// Cache irregular words
Inflector::$irregular = Kohana::$config->load('inflector')->irregular;
}
if (isset(Inflector::$irregular[$str]))
{
$str = Inflector::$irregular[$str];
}
elseif (preg_match('/[sxz]$/', $str) OR preg_match('/[^aeioudgkprt]h$/', $str))
{
$str .= 'es';
}
elseif (preg_match('/[^aeiou]y$/', $str))
{
// Change "y" to "ies"
$str = substr_replace($str, 'ies', -1);
}
else
{
$str .= 's';
}
// Convert to uppsecase if nessasary
if ($is_uppercase)
{
$str = strtoupper($str);
}
// Set the cache and return
return Inflector::$cache[$key] = $str;
}
/**
* Makes a phrase camel case. Spaces and underscores will be removed.
*
* $str = Inflector::camelize('mother cat'); // "motherCat"
* $str = Inflector::camelize('kittens in bed'); // "kittensInBed"
*
* @param string $str phrase to camelize
* @return string
*/
public static function camelize($str)
{
$str = 'x'.strtolower(trim($str));
$str = ucwords(preg_replace('/[\s_]+/', ' ', $str));
return substr(str_replace(' ', '', $str), 1);
}
/**
* Converts a camel case phrase into a spaced phrase.
*
* $str = Inflector::decamelize('houseCat'); // "house cat"
* $str = Inflector::decamelize('kingAllyCat'); // "king ally cat"
*
* @param string $str phrase to camelize
* @param string $sep word separator
* @return string
*/
public static function decamelize($str, $sep = ' ')
{
return strtolower(preg_replace('/([a-z])([A-Z])/', '$1'.$sep.'$2', trim($str)));
}
/**
* Makes a phrase underscored instead of spaced.
*
* $str = Inflector::underscore('five cats'); // "five_cats";
*
* @param string $str phrase to underscore
* @return string
*/
public static function underscore($str)
{
return preg_replace('/\s+/', '_', trim($str));
}
/**
* Makes an underscored or dashed phrase human-readable.
*
* $str = Inflector::humanize('kittens-are-cats'); // "kittens are cats"
* $str = Inflector::humanize('dogs_as_well'); // "dogs as well"
*
* @param string $str phrase to make human-readable
* @return string
*/
public static function humanize($str)
{
return preg_replace('/[_-]+/', ' ', trim($str));
}
} // End Inflector