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[Form] Added FormUtil::singularify()
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‎src/Symfony/Component/Form/Util/FormUtil.php‎

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Original file line numberDiff line numberDiff line change
@@ -16,6 +16,181 @@
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*/
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abstract class FormUtil
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{
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const PLURAL_SUFFIX = 0;
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const PLURAL_SUFFIX_LENGTH = 1;
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const PLURAL_SUFFIX_AFTER_VOCAL = 2;
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const PLURAL_SUFFIX_AFTER_CONS = 3;
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const SINGULAR_SUFFIX = 4;
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/**
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* Map english plural to singular suffixes
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*
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* @var array
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*
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* @see http://english-zone.com/spelling/plurals.html
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* @see http://www.scribd.com/doc/3271143/List-of-100-Irregular-Plural-Nouns-in-English
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*/
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static private $pluralMap = array(
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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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array('a', 1, true, true, array('on', 'um')),
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// nebulae (nebula)
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array('ea', 2, true, true, 'a'),
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// mice (mouse), lice (louse)
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array('eci', 3, false, true, 'ouse'),
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// geese (goose)
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array('esee', 4, false, true, 'oose'),
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// fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius)
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array('i', 1, true, true, 'us'),
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// men (man), women (woman)
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array('nem', 3, true, true, 'man'),
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// children (child)
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array('nerdlihc', 8, true, true, 'child'),
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// oxen (ox)
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array('nexo', 4, false, false, 'ox'),
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// indices (index), appendices (appendix)
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array('seci', 4, false, true, array('ex', 'ix')),
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// babies (baby)
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array('sei', 3, false, true, 'y'),
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// analyses (analysis), ellipses (ellipsis), funguses (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), kisses (kiss)
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array('ses', 3, true, true, array('s', 'se', 'sis')),
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// lives (life), wives (wife)
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array('sevi', 4, false, true, 'ife'),
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf)
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array('sev', 3, true, true, 'f'),
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// axes (axis)
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array('sexa', 4, false, false, 'axis'),
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// indexes (index), matrixes (matrix)
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array('sex', 3, true, false, 'x'),
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// quizzes (quiz)
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array('sezz', 4, true, false, 'z'),
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// bureaus (bureau)
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array('suae', 4, false, true, 'eau'),
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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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array('se', 2, true, true, array('', 'e')),
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// tags (tag)
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array('s', 1, true, true, ''),
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// chateaux (chateau)
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array('xuae', 4, false, true, 'eau'),
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);
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/**
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* Returns the singular form of a word
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*
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* If the method can't determine the form with certainty, an array of the
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* possible singulars is returned.
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*
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* @param string $plural A word in plural form
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* @return string|array The singular form or an array of possible singular
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* forms
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*/
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static public function singularify($plural)
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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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// The outer loop $i iterates over the entries of the plural table
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// The inner loop $j iterates over the characters of the plural suffix
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// in the plural table to compare them with the characters of the actual
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// given plural suffix
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for ($i = 0, $numPlurals = count(self::$pluralMap); $i < $numPlurals; ++$i) {
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$suffix = self::$pluralMap[$i][self::PLURAL_SUFFIX];
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$suffixLength = self::$pluralMap[$i][self::PLURAL_SUFFIX_LENGTH];
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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 (!self::$pluralMap[$i][self::PLURAL_SUFFIX_AFTER_VOCAL] && $nextIsVocal) {
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break;
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}
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if (!self::$pluralMap[$i][self::PLURAL_SUFFIX_AFTER_CONS] && !$nextIsVocal) {
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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 = self::$pluralMap[$i][self::SINGULAR_SUFFIX];
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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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$singulars = array();
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foreach ($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 === $pluralLength) {
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break;
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}
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}
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}
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// Convert teeth to tooth, feet to foot
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if (false !== ($pos = strpos($plural, 'ee'))) {
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return substr_replace($plural, 'oo', $pos, 2);
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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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* Returns whether the given choice is a group.
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*

‎tests/Symfony/Tests/Component/Form/Util/FormUtilTest.php‎

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@@ -77,4 +77,122 @@ public function testIsChoiceSelected($expected, $choice, $value)
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{
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$this->assertSame($expected, FormUtil::isChoiceSelected($choice, $value));
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}
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public function singularifyProvider()
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{
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// see http://english-zone.com/spelling/plurals.html
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// see http://www.scribd.com/doc/3271143/List-of-100-Irregular-Plural-Nouns-in-English
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return array(
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array('tags', 'tag'),
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array('alumni', 'alumnus'),
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array('funguses', array('fungus', 'funguse', 'fungusis')),
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array('fungi', 'fungus'),
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array('axes', 'axis'),
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array('appendices', array('appendex', 'appendix')),
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array('indices', array('index', 'indix')),
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array('indexes', 'index'),
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array('children', 'child'),
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array('men', 'man'),
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array('women', 'woman'),
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array('oxen', 'ox'),
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array('bacteria', array('bacterion', 'bacterium')),
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array('criteria', array('criterion', 'criterium')),
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array('feet', 'foot'),
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array('nebulae', 'nebula'),
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array('babies', 'baby'),
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array('hooves', 'hoof'),
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array('chateaux', 'chateau'),
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array('echoes', array('echo', 'echoe')),
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array('analyses', array('analys', 'analyse', 'analysis')),
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array('theses', array('thes', 'these', 'thesis')),
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array('foci', 'focus'),
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array('focuses', array('focus', 'focuse', 'focusis')),
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array('oases', array('oas', 'oase', 'oasis')),
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array('matrices', array('matrex', 'matrix')),
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array('matrixes', 'matrix'),
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array('bureaus', 'bureau'),
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array('bureaux', 'bureau'),
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array('beaux', 'beau'),
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array('data', array('daton', 'datum')),
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array('phenomena', array('phenomenon', 'phenomenum')),
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array('strata', array('straton', 'stratum')),
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array('geese', 'goose'),
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array('teeth', 'tooth'),
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array('antennae', 'antenna'),
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array('antennas', 'antenna'),
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array('houses', array('hous', 'house', 'housis')),
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array('arches', array('arch', 'arche')),
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array('atlases', array('atlas', 'atlase', 'atlasis')),
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// array('axes', 'axe'),
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array('batches', array('batch', 'batche')),
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array('bushes', array('bush', 'bushe')),
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array('buses', array('bus', 'buse', 'busis')),
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array('calves', 'calf'),
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array('circuses', array('circus', 'circuse', 'circusis')),
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array('crises', array('cris', 'crise', 'crisis')),
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array('dwarves', 'dwarf'),
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array('elves', 'elf'),
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array('emphases', array('emphas', 'emphase', 'emphasis')),
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array('faxes', 'fax'),
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array('halves', 'half'),
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array('heroes', array('hero', 'heroe')),
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array('hoaxes', 'hoax'),
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array('irises', array('iris', 'irise', 'irisis')),
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array('kisses', array('kiss', 'kisse', 'kissis')),
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array('knives', 'knife'),
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array('lives', 'life'),
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array('lice', 'louse'),
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array('mice', 'mouse'),
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array('neuroses', array('neuros', 'neurose', 'neurosis')),
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array('plateaux', 'plateau'),
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array('poppies', 'poppy'),
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array('quizzes', 'quiz'),
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array('scarves', 'scarf'),
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array('spies', 'spy'),
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array('stories', 'story'),
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array('syllabi', 'syllabus'),
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array('thieves', 'thief'),
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array('waltzes', array('waltz', 'waltze')),
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array('wharves', 'wharf'),
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array('wives', 'wife'),
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array('ions', 'ion'),
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array('bases', array('bas', 'base', 'basis')),
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array('cars', 'car'),
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array('cassettes', array('cassett', 'cassette')),
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array('lamps', 'lamp'),
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array('hats', 'hat'),
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array('cups', 'cup'),
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array('boxes', 'box'),
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array('sandwiches', array('sandwich', 'sandwiche')),
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array('suitcases', array('suitcas', 'suitcase', 'suitcasis')),
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array('roses', array('ros', 'rose', 'rosis')),
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array('garages', array('garag', 'garage')),
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array('shoes', array('sho', 'shoe')),
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array('days', 'day'),
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array('boys', 'boy'),
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array('roofs', 'roof'),
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array('cliffs', 'cliff'),
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array('sheriffs', 'sheriff'),
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array('discos', 'disco'),
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array('pianos', 'piano'),
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array('photos', 'photo'),
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array('trees', array('tre', 'tree')),
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array('bees', array('be', 'bee')),
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array('cheeses', array('chees', 'cheese', 'cheesis')),
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array('radii', 'radius'),
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// test casing: if the first letter was uppercase, it should remain so
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array('Men', 'Man'),
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array('GrandChildren', 'GrandChild'),
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array('SubTrees', array('SubTre', 'SubTree')),
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);
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}
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/**
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* @dataProvider singularifyProvider
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*/
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public function testSingularify($plural, $singular)
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{
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$this->assertEquals($singular, FormUtil::singularify($plural));
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}
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}

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