116 lines
3.7 KiB
TypeScript
116 lines
3.7 KiB
TypeScript
/**
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* Copyright (c) 2021 lingdocs.com
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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import { makePsString } from "./p-text-helpers";
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import * as T from "../types";
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/**
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* Returns a Pashto string (or string with Length options) ensuring that
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* the accent is on front
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*
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* @param s
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*/
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export function accentOnFront(s: T.SingleOrLengthOpts<T.PsString>): T.SingleOrLengthOpts<T.PsString> {
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if ("long" in s) {
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return {
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short: accentOnFront(s.short) as T.PsString,
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long: accentOnFront(s.long) as T.PsString,
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};
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}
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return {
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...s,
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f: accentSyllable(removeAccents(s.f)),
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};
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}
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/**
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* Ensures an accent on a past participle ie. leedúley, préxey, azmóyuley
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*
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* @param s - the Pashto string (with Pashto and Phonetics) to ensure the accent on
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*/
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export function accentPastParticiple(s: T.PsString): T.PsString {
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// check for accent placing in words like wáayuley and azmóyuley
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const accentFallsOnThirdLast = (syls: string[]) => {
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if (syls.length < 3) return false;
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const secondLast = syls[syls.length-2];
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const thirdLast = syls[syls.length-3];
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const lastLetterOfThirdLast = thirdLast.slice(-1);
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return (
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(secondLast === "ul") && (lastLetterOfThirdLast === "y")
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);
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}
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// remove all accents
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const accentsRemoved = removeAccents(s.f);
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// split up the syllables (preserving the spaces)
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const syllables = splitUpSyllables(accentsRemoved);
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// add an accent on the appropriate syllable
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const n = accentFallsOnThirdLast(syllables) ? 2 : 1;
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const accentedF = accentFSylsOnNFromEnd(syllables, n);
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return makePsString(s.p, accentedF);
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}
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export function splitUpSyllables(s: string): string[] {
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return s.match(/ |([^a|e|i|o|u| ]*(aa|a|ey|ee|e|oo|o|i|u)[^a|e|i|o|u| ]*)/g) as string[];
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}
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/**
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* Returns a phonetic string with the accent placed n syllables from the end
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*
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* @param syls - an array of syllables in phonetic strings without accents (including spaces as extra items)
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* @param n - the number of syllables from the end to put the accent
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*/
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export function accentFSylsOnNFromEnd(syls: string[], n: number): string {
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return [
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...syls.slice(0, syls.length-(n+1)), // before accent
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accentSyllable(syls[syls.length-(n+1)]), // syllable to be accented
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...(n !== 0) ? syls.slice(syls.length-n) : [], // after syllable to be accented
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].join("");
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}
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export function accentOnNFromEnd(ps: T.PsString, n: number): T.PsString {
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const fSyls = splitUpSyllables(removeAccents(ps.f));
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return makePsString(
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ps.p,
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accentFSylsOnNFromEnd(fSyls, n),
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);
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}
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function accentSyllable(s: string): string {
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const replacer = [
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{ vowel: "a", accented: "á" },
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{ vowel: "e", accented: "é" },
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{ vowel: "i", accented: "í" },
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{ vowel: "o", accented: "ó" },
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{ vowel: "u", accented: "ú" },
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{ vowel: "U", accented: "Ú" },
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];
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return s.replace(/a|e|i|o|u|U/, (match) => {
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const r = replacer.find((x) => x.vowel === match);
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/* istanbul ignore next */
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return r?.accented || "";
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});
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}
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export function removeAccents(s: T.PsString): T.PsString;
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export function removeAccents(s: string): string;
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export function removeAccents(s: T.PsString | string): T.PsString | string {
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if (typeof s !== "string") {
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return makePsString(
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s.p,
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removeAccents(s.f),
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);
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}
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return s.replace(/á/g, "a")
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.replace(/é/g, "e")
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.replace(/í/g, "i")
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.replace(/ó/g, "o")
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.replace(/ú/g, "u")
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.replace(/Á/g, "A")
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.replace(/Ú/g, "U");
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}
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