;;; inflections.el ---

;; Copyright (C) 2006 Dmitry Galinsky <dima dot exe at gmail dot com>

;; Authors: Dmitry Galinsky <dima dot exe at gmail dot com>,

;;          Howard Yeh <hayeah at gmail dot com>

;; Keywords: ruby rails languages oop

;; $URL$

;; $Id$

;;; License

;; 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; either version 2

;; of the License, or (at your option) any later version.

;; 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.

;;; Code:

(defvar inflection-singulars    nil)

(defvar inflection-plurals      nil)

(defvar inflection-irregulars   nil)

(defvar inflection-uncountables nil)

(defmacro define-inflectors (&rest specs)

  `(progn

     ,@(loop for (type . rest) in specs collect

	   (case type

	     (:singular `(push ',rest inflection-singulars))

	     (:plural `(push ',rest inflection-plurals))

	     (:irregular `(push ',rest inflection-irregulars))

	     (:uncountable `(setf inflection-uncountables

				  (append ',rest inflection-uncountables)))))))

(define-inflectors

  (:plural "$" "s")

  (:plural "s$" "s")

  (:plural "\\(ax\\|test\\)is$" "\\1es")

  (:plural "\\(octop\\|vir\\)us$" "\\1i")

  (:plural "\\(alias\\|status\\)$" "\\1es")

  (:plural "\\(bu\\)s$" "\\1ses")

  (:plural "\\(buffal\\|tomat\\)o$" "\\1oes")

  (:plural "\\([ti]\\)um$" "\\1a")

  (:plural "sis$" "ses")

  (:plural "\\(?:\\([^f]\\)fe\\|\\([lr]\\)f\\)$" "\\1\\2ves")

  (:plural "\\(hive\\)$" "\\1s")

  (:plural "\\([^aeiouy]\\|qu\\)y$" "\\1ies")

  (:plural "\\(x\\|ch\\|ss\\|sh\\)$" "\\1es")

  (:plural "\\(matr\\|vert\\|ind\\)ix\\|ex$" "\\1ices")

  (:plural "\\([m\\|l]\\)ouse$" "\\1ice")

  (:plural "^\\(ox\\)$" "\\1en")

  (:plural "\\(quiz\\)$" "\\1zes")

  (:singular "s$" "")

  (:singular "\\(n\\)ews$" "\\1ews")

  (:singular "\\([ti]\\)a$" "\\1um")

  (:singular "\\(\\(a\\)naly\\|\\(b\\)a\\|\\(d\\)iagno\\|\\(p\\)arenthe\\|\\(p\\)rogno\\|\\(s\\)ynop\\|\\(t\\)he\\)ses$" "\\1\\2sis")

  (:singular "\\(^analy\\)ses$" "\\1sis")

  (:singular "\\([^f]\\)ves$" "\\1fe")

  (:singular "\\(hive\\)s$" "\\1")

  (:singular "\\(tive\\)s$" "\\1")

  (:singular "\\([lr]\\)ves$" "\\1f")

  (:singular "\\([^aeiouy]\\|qu\\)ies$" "\\1y")

  (:singular "\\(s\\)eries$" "\\1eries")

  (:singular "\\(m\\)ovies$" "\\1ovie")

  (:singular "\\(x\\|ch\\|ss\\|sh\\)es$" "\\1")

  (:singular "\\([m\\|l]\\)ice$" "\\1ouse")

  (:singular "\\(bus\\)es$" "\\1")

  (:singular "\\(o\\)es$" "\\1")

  (:singular "\\(shoe\\)s$" "\\1")

  (:singular "\\(cris\\|ax\\|test\\)es$" "\\1is")

  (:singular "\\(octop\\|vir\\)i$" "\\1us")

  (:singular "\\(alias\\|status\\)es$" "\\1")

  (:singular "^\\(ox\\)en" "\\1")

  (:singular "\\(vert\\|ind\\)ices$" "\\1ex")

  (:singular "\\(matr\\)ices$" "\\1ix")

  (:singular "\\(quiz\\)zes$" "\\1")

  (:irregular "stratum" "strate")

  (:irregular "syllabus" "syllabi")

  (:irregular "radius" "radii")

  (:irregular "addendum" "addenda")

  (:irregular "cactus" "cacti")

  (:irregular "child" "children")

  (:irregular "corpus" "corpora")

  (:irregular "criterion" "criteria")

  (:irregular "datum" "data")

  (:irregular "genus" "genera")

  (:irregular "man" "men")

  (:irregular "medium" "media")

  (:irregular "move" "moves")

  (:irregular "person" "people")

  (:irregular "man" "men")

  (:irregular "child" "children")

  (:irregular "sex" "sexes")

  (:irregular "move" "moves")

  (:uncountable "equipment" "information" "rice" "money" "species" "series" "fish" "sheep" "news"))

(defun singularize-string (str)

  (when (stringp str)

    (or (car (member str inflection-uncountables))

        (caar (member* (downcase str) inflection-irregulars :key 'cadr :test 'equal))

        (loop for (from to) in inflection-singulars

              for singular = (string=~ from str (sub to))

              when singular do (return singular))

        str)))

(defun pluralize-string (str)

  (when (stringp str)

    (or (car (member str inflection-uncountables))

        (cadar (member* (downcase str) inflection-irregulars :key 'car :test 'equal))

        (loop for (from to) in inflection-plurals

              for plurals = (string=~ from str (sub to))

              when plurals do (return plurals))

        str)))

(provide 'inflections)