512 lines
15 KiB
PHP
512 lines
15 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\String\Inflector;
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final class EnglishInflector implements InflectorInterface
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{
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/**
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* Map English plural to singular suffixes.
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*
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* @see http://english-zone.com/spelling/plurals.html
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*/
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private const PLURAL_MAP = [
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// First entry: plural suffix, reversed
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// Second entry: length of plural suffix
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// Third entry: Whether the suffix may succeed a vocal
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// Fourth entry: Whether the suffix may succeed a consonant
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// Fifth entry: singular suffix, normal
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon)
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['a', 1, true, true, ['on', 'um']],
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// nebulae (nebula)
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['ea', 2, true, true, 'a'],
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// services (service)
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['secivres', 8, true, true, 'service'],
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// mice (mouse), lice (louse)
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['eci', 3, false, true, 'ouse'],
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// geese (goose)
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['esee', 4, false, true, 'oose'],
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// fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius)
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['i', 1, true, true, 'us'],
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// men (man), women (woman)
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['nem', 3, true, true, 'man'],
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// children (child)
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['nerdlihc', 8, true, true, 'child'],
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// oxen (ox)
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['nexo', 4, false, false, 'ox'],
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// indices (index), appendices (appendix), prices (price)
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['seci', 4, false, true, ['ex', 'ix', 'ice']],
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// selfies (selfie)
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['seifles', 7, true, true, 'selfie'],
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// zombies (zombie)
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['seibmoz', 7, true, true, 'zombie'],
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// movies (movie)
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['seivom', 6, true, true, 'movie'],
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// conspectuses (conspectus), prospectuses (prospectus)
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['sesutcep', 8, true, true, 'pectus'],
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// feet (foot)
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['teef', 4, true, true, 'foot'],
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// geese (goose)
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['eseeg', 5, true, true, 'goose'],
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// teeth (tooth)
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['hteet', 5, true, true, 'tooth'],
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// news (news)
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['swen', 4, true, true, 'news'],
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// series (series)
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['seires', 6, true, true, 'series'],
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// babies (baby)
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['sei', 3, false, true, 'y'],
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// accesses (access), addresses (address), kisses (kiss)
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['sess', 4, true, false, 'ss'],
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// analyses (analysis), ellipses (ellipsis), fungi (fungus),
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// neuroses (neurosis), theses (thesis), emphases (emphasis),
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// oases (oasis), crises (crisis), houses (house), bases (base),
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// atlases (atlas)
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['ses', 3, true, true, ['s', 'se', 'sis']],
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// objectives (objective), alternative (alternatives)
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['sevit', 5, true, true, 'tive'],
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// drives (drive)
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['sevird', 6, false, true, 'drive'],
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// lives (life), wives (wife)
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['sevi', 4, false, true, 'ife'],
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// moves (move)
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['sevom', 5, true, true, 'move'],
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf), caves (cave), staves (staff)
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['sev', 3, true, true, ['f', 've', 'ff']],
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// axes (axis), axes (ax), axes (axe)
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['sexa', 4, false, false, ['ax', 'axe', 'axis']],
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// indexes (index), matrixes (matrix)
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['sex', 3, true, false, 'x'],
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// quizzes (quiz)
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['sezz', 4, true, false, 'z'],
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// bureaus (bureau)
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['suae', 4, false, true, 'eau'],
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// fees (fee), trees (tree), employees (employee)
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['see', 3, true, true, 'ee'],
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// edges (edge)
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['segd', 4, true, true, 'dge'],
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// roses (rose), garages (garage), cassettes (cassette),
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// waltzes (waltz), heroes (hero), bushes (bush), arches (arch),
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// shoes (shoe)
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['se', 2, true, true, ['', 'e']],
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// tags (tag)
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['s', 1, true, true, ''],
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// chateaux (chateau)
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['xuae', 4, false, true, 'eau'],
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// people (person)
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['elpoep', 6, true, true, 'person'],
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];
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/**
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* Map English singular to plural suffixes.
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*
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* @see http://english-zone.com/spelling/plurals.html
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*/
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private const SINGULAR_MAP = [
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// First entry: singular suffix, reversed
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// Second entry: length of singular suffix
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// Third entry: Whether the suffix may succeed a vocal
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// Fourth entry: Whether the suffix may succeed a consonant
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// Fifth entry: plural suffix, normal
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// criterion (criteria)
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['airetirc', 8, false, false, 'criterion'],
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// nebulae (nebula)
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['aluben', 6, false, false, 'nebulae'],
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// children (child)
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['dlihc', 5, true, true, 'children'],
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// prices (price)
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['eci', 3, false, true, 'ices'],
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// services (service)
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['ecivres', 7, true, true, 'services'],
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// lives (life), wives (wife)
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['efi', 3, false, true, 'ives'],
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// selfies (selfie)
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['eifles', 6, true, true, 'selfies'],
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// movies (movie)
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['eivom', 5, true, true, 'movies'],
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// lice (louse)
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['esuol', 5, false, true, 'lice'],
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// mice (mouse)
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['esuom', 5, false, true, 'mice'],
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// geese (goose)
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['esoo', 4, false, true, 'eese'],
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// houses (house), bases (base)
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['es', 2, true, true, 'ses'],
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// geese (goose)
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['esoog', 5, true, true, 'geese'],
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// caves (cave)
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['ev', 2, true, true, 'ves'],
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// drives (drive)
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['evird', 5, false, true, 'drives'],
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// objectives (objective), alternative (alternatives)
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['evit', 4, true, true, 'tives'],
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// moves (move)
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['evom', 4, true, true, 'moves'],
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// staves (staff)
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['ffats', 5, true, true, 'staves'],
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf)
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['ff', 2, true, true, 'ffs'],
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf)
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['f', 1, true, true, ['fs', 'ves']],
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// arches (arch)
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['hc', 2, true, true, 'ches'],
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// bushes (bush)
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['hs', 2, true, true, 'shes'],
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// teeth (tooth)
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['htoot', 5, true, true, 'teeth'],
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon)
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['mu', 2, true, true, 'a'],
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// men (man), women (woman)
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['nam', 3, true, true, 'men'],
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// people (person)
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['nosrep', 6, true, true, ['persons', 'people']],
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon)
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['noi', 3, true, true, 'ions'],
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// coupon (coupons)
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['nop', 3, true, true, 'pons'],
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// seasons (season), treasons (treason), poisons (poison), lessons (lesson)
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['nos', 3, true, true, 'sons'],
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon)
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['no', 2, true, true, 'a'],
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// echoes (echo)
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['ohce', 4, true, true, 'echoes'],
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// heroes (hero)
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['oreh', 4, true, true, 'heroes'],
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// atlases (atlas)
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['salta', 5, true, true, 'atlases'],
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// irises (iris)
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['siri', 4, true, true, 'irises'],
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// analyses (analysis), ellipses (ellipsis), neuroses (neurosis)
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// theses (thesis), emphases (emphasis), oases (oasis),
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// crises (crisis)
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['sis', 3, true, true, 'ses'],
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// accesses (access), addresses (address), kisses (kiss)
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['ss', 2, true, false, 'sses'],
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// syllabi (syllabus)
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['suballys', 8, true, true, 'syllabi'],
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// buses (bus)
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['sub', 3, true, true, 'buses'],
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// circuses (circus)
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['suc', 3, true, true, 'cuses'],
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// conspectuses (conspectus), prospectuses (prospectus)
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['sutcep', 6, true, true, 'pectuses'],
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// fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius)
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['su', 2, true, true, 'i'],
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// news (news)
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['swen', 4, true, true, 'news'],
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// feet (foot)
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['toof', 4, true, true, 'feet'],
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// chateaux (chateau), bureaus (bureau)
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['uae', 3, false, true, ['eaus', 'eaux']],
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// oxen (ox)
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['xo', 2, false, false, 'oxen'],
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// hoaxes (hoax)
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['xaoh', 4, true, false, 'hoaxes'],
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// indices (index)
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['xedni', 5, false, true, ['indicies', 'indexes']],
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// boxes (box)
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['xo', 2, false, true, 'oxes'],
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// indexes (index), matrixes (matrix)
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['x', 1, true, false, ['cies', 'xes']],
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// appendices (appendix)
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['xi', 2, false, true, 'ices'],
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// babies (baby)
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['y', 1, false, true, 'ies'],
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// quizzes (quiz)
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['ziuq', 4, true, false, 'quizzes'],
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// waltzes (waltz)
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['z', 1, true, true, 'zes'],
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];
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/**
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* A list of words which should not be inflected, reversed.
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*/
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private const UNINFLECTED = [
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'',
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// data
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'atad',
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// deer
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'reed',
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// feedback
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'kcabdeef',
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// fish
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'hsif',
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// info
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'ofni',
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// moose
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'esoom',
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// series
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'seires',
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// sheep
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'peehs',
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// species
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'seiceps',
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];
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/**
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* {@inheritdoc}
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*/
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public function singularize(string $plural): array
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{
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$pluralRev = strrev($plural);
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$lowerPluralRev = strtolower($pluralRev);
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$pluralLength = \strlen($lowerPluralRev);
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// Check if the word is one which is not inflected, return early if so
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if (\in_array($lowerPluralRev, self::UNINFLECTED, true)) {
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return [$plural];
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}
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// The outer loop iterates over the entries of the plural table
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// The inner loop $j iterates over the characters of the plural suffix
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// in the plural table to compare them with the characters of the actual
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// given plural suffix
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foreach (self::PLURAL_MAP as $map) {
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$suffix = $map[0];
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$suffixLength = $map[1];
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$j = 0;
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// Compare characters in the plural table and of the suffix of the
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// given plural one by one
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while ($suffix[$j] === $lowerPluralRev[$j]) {
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// Let $j point to the next character
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++$j;
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// Successfully compared the last character
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// Add an entry with the singular suffix to the singular array
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if ($j === $suffixLength) {
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// Is there any character preceding the suffix in the plural string?
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if ($j < $pluralLength) {
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$nextIsVocal = false !== strpos('aeiou', $lowerPluralRev[$j]);
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if (!$map[2] && $nextIsVocal) {
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// suffix may not succeed a vocal but next char is one
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break;
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}
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if (!$map[3] && !$nextIsVocal) {
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// suffix may not succeed a consonant but next char is one
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break;
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}
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}
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$newBase = substr($plural, 0, $pluralLength - $suffixLength);
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$newSuffix = $map[4];
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// Check whether the first character in the plural suffix
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// is uppercased. If yes, uppercase the first character in
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// the singular suffix too
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$firstUpper = ctype_upper($pluralRev[$j - 1]);
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if (\is_array($newSuffix)) {
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$singulars = [];
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foreach ($newSuffix as $newSuffixEntry) {
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$singulars[] = $newBase.($firstUpper ? ucfirst($newSuffixEntry) : $newSuffixEntry);
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}
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return $singulars;
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}
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return [$newBase.($firstUpper ? ucfirst($newSuffix) : $newSuffix)];
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}
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// Suffix is longer than word
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if ($j === $pluralLength) {
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break;
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}
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}
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}
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// Assume that plural and singular is identical
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return [$plural];
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}
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/**
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* {@inheritdoc}
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*/
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public function pluralize(string $singular): array
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{
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$singularRev = strrev($singular);
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$lowerSingularRev = strtolower($singularRev);
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$singularLength = \strlen($lowerSingularRev);
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// Check if the word is one which is not inflected, return early if so
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if (\in_array($lowerSingularRev, self::UNINFLECTED, true)) {
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return [$singular];
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}
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// The outer loop iterates over the entries of the singular table
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// The inner loop $j iterates over the characters of the singular suffix
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// in the singular table to compare them with the characters of the actual
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// given singular suffix
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foreach (self::SINGULAR_MAP as $map) {
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$suffix = $map[0];
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$suffixLength = $map[1];
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$j = 0;
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// Compare characters in the singular table and of the suffix of the
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// given plural one by one
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while ($suffix[$j] === $lowerSingularRev[$j]) {
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// Let $j point to the next character
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++$j;
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// Successfully compared the last character
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// Add an entry with the plural suffix to the plural array
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if ($j === $suffixLength) {
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// Is there any character preceding the suffix in the plural string?
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if ($j < $singularLength) {
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$nextIsVocal = false !== strpos('aeiou', $lowerSingularRev[$j]);
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if (!$map[2] && $nextIsVocal) {
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// suffix may not succeed a vocal but next char is one
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break;
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}
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if (!$map[3] && !$nextIsVocal) {
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// suffix may not succeed a consonant but next char is one
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break;
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}
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}
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$newBase = substr($singular, 0, $singularLength - $suffixLength);
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$newSuffix = $map[4];
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// Check whether the first character in the singular suffix
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// is uppercased. If yes, uppercase the first character in
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// the singular suffix too
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$firstUpper = ctype_upper($singularRev[$j - 1]);
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if (\is_array($newSuffix)) {
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$plurals = [];
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foreach ($newSuffix as $newSuffixEntry) {
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$plurals[] = $newBase.($firstUpper ? ucfirst($newSuffixEntry) : $newSuffixEntry);
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}
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return $plurals;
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}
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return [$newBase.($firstUpper ? ucfirst($newSuffix) : $newSuffix)];
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}
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// Suffix is longer than word
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if ($j === $singularLength) {
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break;
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}
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}
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}
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// Assume that plural is singular with a trailing `s`
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return [$singular.'s'];
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}
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}
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