47 lines
1.2 KiB
Dart
47 lines
1.2 KiB
Dart
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//library inflection2.singular_verb;
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import 'dart:convert';
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import 'irregular_plural_verbs.dart';
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import 'util.dart';
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class SingularVerbEncoder extends Converter<String, String> {
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final List<List> _inflectionRules = [];
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SingularVerbEncoder() {
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irregularPluralVerbs.forEach((singular, plural) {
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addInflectionRule(plural, (Match m) => singular);
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});
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[
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[r'$', (Match m) => 's'],
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[r'([^aeiou])y$', (Match m) => '${m[1]}ies'],
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[r'(z)$', (Match m) => '${m[1]}es'],
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[r'(ss|zz|x|h|o|us)$', (Match m) => '${m[1]}es'],
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[r'(ed)$', (Match m) => '${m[1]}']
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]
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.reversed
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.forEach((rule) => addInflectionRule(rule.first as String, rule.last));
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}
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void addInflectionRule(String singular, dynamic plural) {
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_inflectionRules.add([new RegExp(singular, caseSensitive: false), plural]);
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}
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@override
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String convert(String word) {
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if (!word.isEmpty) {
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for (var r in _inflectionRules) {
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var pattern = r.first as RegExp;
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if (pattern.hasMatch(word)) {
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return word.replaceAllMapped(pattern, r.last as MatchToString);
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}
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}
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}
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return word;
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}
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}
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final Converter<String, String> SINGULARVERB = new SingularVerbEncoder();
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