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Nick Lockwood
103 lines
3.6 KiB
Swift
103 lines
3.6 KiB
Swift
//
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// Singularize.swift
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// SwiftFormat
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//
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// Created by Nick Lockwood on 02/01/2024.
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// Copyright 2024 Nick Lockwood
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//
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// Distributed under the permissive MIT license
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// Get the latest version from here:
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//
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// https://github.com/nicklockwood/SwiftFormat
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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import Foundation
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/// Inspired by https://github.com/Cosmo/GrammaticalNumber
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private let rules: [(String, replacement: String)] = [
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("s$", ""),
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("eaux$", "eau"),
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("ae$", "a"),
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("era$", "us"),
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("(e)ae$", "$1us"),
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("(ss)$", "$1"),
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("(tt?)i$", "$1o"),
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("([tivdl])a$", "$1um"),
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("(i)ves$", "$1fe"),
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("([alr]|oo|ie)ves$", "$1f"),
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("([th]ive)s$", "$1"),
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("([^aeiouy]|qu)ies$", "$1y"),
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("(ov|mb)ies$", "$1ie"),
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("(x|ch|ss|sh)es$", "$1"),
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("([ml])ice$", "$1ouse"),
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("(d)ice$", "$1ie"),
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("(bus|ato)es$", "$1"),
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("(cris|test)es$", "$1is"),
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("^(pra|a)xes$", "$1xis"),
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("([sz])es$", "$1"),
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("(ace|ase)s$", "$1"),
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("(ias)es$", "$1"),
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("(z)zes$", "$1"),
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("((ba|grou)se)s$", "$1"),
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("(x)en", "$1"),
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("(oa|ly|gno|op|the|ip)ses$", "$1sis"),
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("(rt|ind|ap|cod)ices$", "$1ex"),
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("(tr|end)ices$", "$1ix"),
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("(oc|radi|vir|octop|alumn|cill|cact|fung|ul|ab)i$", "$1us"),
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("(vir)ii$", "$1us"),
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("(quiz)zes$", "$1"),
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("(pe)ople$", "$1rson"),
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("(m)en$", "$1an"),
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("(child)ren$", "$1"),
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("(t)eeth$", "$1ooth"),
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("(g)eese$", "$1oose"),
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("(iteri|en)a$", "$1on"),
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// Uncountable
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("(bison|craft|deer|equipment|fish|fruit|grouse|money|news|offspring)$", "$1"),
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("(info(rmation)?|rice|salmon|series|sheep|shrimp|species|swine|trout|tuna)$", "$1"),
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// It's very rare to actually want "datum" or "medium"
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("(data|media)$", "$1"),
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]
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extension String {
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func singularized() -> String? {
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guard let (rule, replacement) = (rules.reversed().first { rule, _ in
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range(of: rule, options: [.regularExpression, .caseInsensitive], range: nil, locale: nil) != nil
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}) else {
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return nil
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}
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return replacingOccurrences(of: rule, with: replacement, options: [.regularExpression, .caseInsensitive])
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.removingPrefix("all")
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}
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func removingPrefix(_ prefix: String) -> String? {
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if hasPrefix(prefix.lowercased()) {
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let string = dropFirst(prefix.count)
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return string.first.map { "\($0.lowercased())\(string.dropFirst())" }
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}
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if hasPrefix(prefix.capitalized) {
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let string = dropFirst(prefix.count)
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return string.first.map { "\($0.uppercased())\(string.dropFirst())" }
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}
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return self
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}
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}
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