579 lines
18 KiB
TypeScript
579 lines
18 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 { removeAccents } from "./accent-helpers";
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export type DiacriticsAccumulator = { pIn: string, pOut: string };
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type Consonant = "b" | "p" | "t" | "T" | "s" | "j" | "ch" | "kh" | "ts" | "dz" | "d" | "D" | "r" | "R" | "z" | "jz" | "G" | "sh" | "x" | "gh" | "f" | "q" | "k" | "g" | "l" | "m" | "n" | "N" | "h" | "w" | "y";
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type Ain = "'"
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type JoiningVowel = "-i-" | "-U-" | "-Ul-";
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type LongVowel = "aa" | "ee" | "e" | "oo" | "o" | "ey" | "uy" | "eyy";
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type ShortVowel = "a" | "i" | "u" | "U";
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export type Phoneme = Consonant | Ain | LongVowel | ShortVowel | JoiningVowel;
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type PhonemeInfo = {
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matches?: string[],
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beginningMatches?: string[],
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endingMatches?: string[],
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consonant?: true,
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diacritic?: string,
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endingOnly?: true,
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takesSukunOnEnding?: true,
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longVowel?: true,
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canStartWithAynBefore?: true,
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useEndingDiacritic?: true,
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ainBlendDiacritic?: string,
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}
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export const zwar = "َ";
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export const zwarakey = "ٙ";
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export const zer = "ِ";
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export const pesh = "ُ";
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export const sukun = "ْ";
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export const hamzaAbove = "ٔ";
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export const tashdeed = "ّ";
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export const wasla = "ٱ";
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export const daggerAlif = "ٰ";
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export const fathahan = "ً";
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export const phonemeTable: Record<Phoneme, PhonemeInfo> = {
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// Consonants
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"b": {
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matches: ["ب"],
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consonant: true,
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},
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"p": {
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matches: ["پ"],
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consonant: true,
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},
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"t": {
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matches: ["ت", "ط"],
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consonant: true,
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},
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"T": {
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matches: ["ټ"],
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consonant: true,
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},
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"s": {
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matches: ["س", "ص", "ث"],
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consonant: true,
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},
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"j": {
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matches: ["ج"],
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consonant: true,
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},
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"ch": {
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matches: ["چ"],
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consonant: true,
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},
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"kh": {
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matches: ["خ"],
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consonant: true,
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},
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"ts": {
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matches: ["څ"],
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consonant: true,
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},
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"dz": {
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matches: ["ځ"],
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consonant: true,
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},
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"d": {
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matches: ["د"],
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consonant: true,
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},
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"D": {
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matches: ["ډ"],
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consonant: true,
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},
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"r": {
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matches: ["ر"],
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consonant: true,
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},
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"R": {
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matches: ["ړ"],
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consonant: true,
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},
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"z": {
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matches: ["ز", "ذ", "ظ", "ض"],
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consonant: true,
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},
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"jz": {
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matches: ["ژ"],
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consonant: true,
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},
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"G": {
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matches: ["ږ"],
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consonant: true,
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},
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"sh": {
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matches: ["ش"],
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consonant: true,
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},
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"x": {
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matches: ["ښ"],
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consonant: true,
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},
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"gh": {
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matches: ["غ"],
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consonant: true,
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},
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"f": {
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matches: ["ف"],
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consonant: true,
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},
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"q": {
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matches: ["ق"],
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consonant: true,
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},
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"k": {
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matches: ["ک"],
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consonant: true,
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},
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"g": {
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matches: ["ګ"],
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consonant: true,
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},
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"l": {
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matches: ["ل"],
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consonant: true,
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},
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"m": {
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matches: ["م"],
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consonant: true,
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},
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"n": {
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matches: ["ن"],
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consonant: true,
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},
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"N": {
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matches: ["ڼ"],
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consonant: true,
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},
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"h": {
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matches: ["ه", "ح"],
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consonant: true,
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takesSukunOnEnding: true,
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},
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"w": {
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matches: ["و"],
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consonant: true,
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},
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"y": {
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matches: ["ی"],
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consonant: true,
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},
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// Ain
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"'": {
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matches: ["ع", "ئ"],
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consonant: true,
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},
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// Joining Vowels
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"-i-": {
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},
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"-U-": {
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matches: [" و ", "و"],
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},
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"-Ul-": {
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matches: ["ال"],
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},
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// Long Vowels
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"aa": {
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matches: ["ا", "أ"],
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beginningMatches: ["آ", "ا"],
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endingMatches: ["ا", "یٰ"],
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longVowel: true,
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ainBlendDiacritic: zwar,
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},
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"ee": {
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matches: ["ی"],
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longVowel: true,
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endingMatches: ["ي"],
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diacritic: zer,
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canStartWithAynBefore: true,
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ainBlendDiacritic: zer,
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},
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"e": {
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matches: ["ې"],
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longVowel: true,
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},
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"o": {
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matches: ["و"],
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longVowel: true,
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},
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"oo": {
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matches: ["و"],
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longVowel: true,
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diacritic: pesh,
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useEndingDiacritic: true,
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ainBlendDiacritic: pesh,
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},
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"ey": {
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matches: ["ی"],
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longVowel: true,
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endingMatches: ["ی"],
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},
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"uy": {
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matches: ["ۍ"],
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longVowel: true,
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endingOnly: true,
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},
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"eyy": {
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matches: ["ئ"],
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longVowel: true,
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endingOnly: true,
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},
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// Short Vowels
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"a": {
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diacritic: zwar,
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endingMatches: ["ه"],
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beginningMatches: ["ا", "ع"],
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// canComeAfterHeyEnding: true,
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},
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"u": {
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diacritic: zwarakey,
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endingMatches: ["ه"],
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},
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"i": {
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diacritic: zer,
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endingMatches: ["ه"],
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beginningMatches: ["ا", "ع"],
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// takesDiacriticBeforeGurdaHeyEnding: true,
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// canBeWasla: true,
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},
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"U": {
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diacritic: pesh,
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endingMatches: ["ه"],
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// takesDiacriticBeforeGurdaHeyEnding: true,
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beginningMatches: ["ا", "ع"],
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},
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}
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/**
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* splits a phonetics string into an array of Phonemes
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*
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* will error if there is an illeagal phonetics character
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*
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* @param fIn a phonetics string
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* @returns an array of phonemes
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*/
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export function splitFIntoPhonemes(fIn: string): Phoneme[] {
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const singleLetterPhonemes: Phoneme[] = ["a", "i", "u", "o", "e", "U", "b", "p", "t", "T", "s", "j", "d", "D", "r", "R", "z", "G", "x", "f", "q", "k", "g", "l", "m", "n", "N", "h", "w", "y", "'"];
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const quadrigraphs: Phoneme[] = ["-Ul-"];
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const trigraphs: Phoneme[] = ["eyy", "-i-", "-U-"];
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const digraphs: Phoneme[] = ["aa", "ee", "ey", "oo", "kh", "gh", "ts", "dz", "jz", "ch", "sh"];
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const endingDigraphs: Phoneme[] = ["uy"];
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const willIgnore = ["?", " ", "`", ".", "…", ",", "-"];
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const result: Phoneme[] = [];
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const f = removeAccents(fIn).replace(/ă/g, "a");
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let index = 0;
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while (index < f.length) {
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const isLastTwoLetters = (index === f.length - 2 || f[index + 2] === " ");
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const threeLetterChunk = f.slice(index, index + 3) as Phoneme;
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const fourLetterChunk = f.slice(index, index + 4) as Phoneme;
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if (quadrigraphs.includes(fourLetterChunk)) {
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result.push(fourLetterChunk);
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index += 4;
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continue;
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}
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if (trigraphs.includes(threeLetterChunk)) {
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result.push(threeLetterChunk);
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index += 3;
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continue;
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}
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const twoLetterChunk = f.slice(index, index + 2) as Phoneme;
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if (
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digraphs.includes(twoLetterChunk) ||
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(isLastTwoLetters && endingDigraphs.includes(twoLetterChunk))
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) {
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result.push(twoLetterChunk);
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index += 2;
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continue;
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}
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const singleLetter = f.slice(index, index + 1) as Phoneme;
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if (!willIgnore.includes(singleLetter)) {
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if (!singleLetterPhonemes.includes(singleLetter)) {
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throw new Error(`illegal phonetic character: ${singleLetter}`);
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}
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result.push(singleLetter);
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}
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index++;
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}
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return result;
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}
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export enum PhonemeStatus {
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LeadingLongVowel,
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LeadingConsonantOrShortVowel,
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DoubleConsonantTashdeed,
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EndingWithHeyHim,
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DirectMatch,
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DirectMatchAfterSukun,
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EndingWithHeyHimFromSukun,
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ShortVowel,
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PersianSilentWWithAa,
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ArabicWasla,
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Izafe,
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EndOfDuParticle,
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ShortAEndingAfterHeem,
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AlefDaggarEnding,
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SilentAinAfterAlef,
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AinWithLongAAtBeginning,
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LongAinVowelMissingComma,
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ShortAinVowelMissingComma,
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ShortAinVowelMissingCommaAfterAlefStart,
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AinBeginningAfterShortVowel,
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AlefWithHamza,
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AlefWithHamzaWithGlottalStop,
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WoEndingO,
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ShortAForAlefBeforeFathatan,
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NOnFathatan,
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HamzaOnWow,
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ArabicDefiniteArticleUl,
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OoPrefix,
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AlefHamzaBeg,
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GlottalStopBeforeOo,
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OoAfterGlottalStopOo,
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EndingSmallH,
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}
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export function stateInfo({ state, i, phonemes, phoneme }: {
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state: DiacriticsAccumulator,
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i: number,
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phonemes: Phoneme[],
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phoneme: Phoneme,
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}) {
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const isOutOfWord = (char: string) => !char || char === " ";
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const prevPLetter = last(state.pOut);
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const currentPLetter = state.pIn[0];
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const nextPLetter = state.pIn[1];
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const nextPhoneme = phonemes[i+1];
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const previousPhoneme = i > 0 && phonemes[i-1];
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const lastThreePLetters = last(state.pOut, 3) + last(state.pOut, 2) + prevPLetter;
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const isBeginningOfWord = (state.pOut === "" || prevPLetter === " ") || (previousPhoneme === "-Ul-" && prevPLetter === "ل") || (["دَر", "وَر"].includes(lastThreePLetters) || (last(state.pOut, 2) + prevPLetter) === "را");
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const isEndOfWord = isOutOfWord(nextPLetter);
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const phonemeInfo = phonemeTable[phoneme];
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const previousPhonemeInfo = (!isBeginningOfWord && i > 0) && phonemeTable[phonemes[i-1]];
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// const nextPhoneme = (phonemes.length > (i + 1)) && phonemes[i+1];
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// const nextPhonemeInfo = nextPhoneme ? phonemeTable[nextPhoneme] : undefined;
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const doubleConsonant = previousPhonemeInfo && (phonemeInfo.consonant && previousPhonemeInfo.consonant);
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const needsSukun = (doubleConsonant && ((previousPhoneme !== phoneme) || phonemeInfo.matches?.includes(currentPLetter))) // || (isEndOfWord && phonemeInfo.takesSukunOnEnding);
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const useAinBlendDiacritics = (!isBeginningOfWord && (phonemeInfo.ainBlendDiacritic && currentPLetter === "ع"));
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const diacritic = useAinBlendDiacritics
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? phonemeInfo.ainBlendDiacritic
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: isEndOfWord
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? ((!phonemeInfo.longVowel || phonemeInfo.useEndingDiacritic) ? phonemeInfo.diacritic : undefined) : phonemeInfo.diacritic;
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const lastWordEndedW = (char: string) => ((prevPLetter === char && !currentPLetter) || (prevPLetter === " " && last(state.pOut, 2) === char));
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function getPhonemeState(): PhonemeStatus {
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if (isBeginningOfWord && phoneme === "aa" && phonemeInfo.beginningMatches?.includes(currentPLetter)) {
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return PhonemeStatus.DirectMatch;
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}
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if (isBeginningOfWord && phoneme === "oo" && currentPLetter === "و") {
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return PhonemeStatus.OoPrefix;
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}
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if (isBeginningOfWord && (phonemeInfo.longVowel && !phonemeInfo.endingOnly)) {
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if (phoneme !== "aa" && currentPLetter !== "ا" && !phonemeInfo.matches?.includes(nextPLetter)) {
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throw Error("phonetics error - needs alef prefix");
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}
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return PhonemeStatus.LeadingLongVowel;
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}
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if (isBeginningOfWord && (phonemeInfo.beginningMatches?.includes(currentPLetter) || phonemeInfo.matches?.includes(currentPLetter))) {
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return PhonemeStatus.LeadingConsonantOrShortVowel;
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}
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if (isBeginningOfWord && phoneme === "aa" && currentPLetter === "ع" && nextPLetter === "ا") {
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return PhonemeStatus.AinWithLongAAtBeginning;
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}
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if (currentPLetter === "ا" && nextPLetter === "ع" && phoneme === "aa" && nextPhoneme !== "'") {
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return PhonemeStatus.SilentAinAfterAlef;
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}
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// console.log("------");
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// console.log("phoneme", phoneme);
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// console.log("state", state);
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// console.log("prevPLetter is space", prevPLetter === " ");
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// console.log("------");
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if (isBeginningOfWord && phoneme === "u" && prevPLetter === " " && lastNonWhitespace(state.pOut) === "د") {
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return PhonemeStatus.EndOfDuParticle
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}
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if (isBeginningOfWord && phoneme === "-Ul-" && currentPLetter === "ا" && nextPLetter === "ل") {
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return PhonemeStatus.ArabicDefiniteArticleUl;
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}
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if (phoneme === "a" && nextPhoneme === "'" && phonemes[i+2] === "a" && currentPLetter === "أ") {
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return PhonemeStatus.AlefHamzaBeg;
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}
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if (phoneme === "a" && previousPhoneme === "U" && currentPLetter === "و") {
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return PhonemeStatus.HamzaOnWow;
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}
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if (phoneme === "a" && currentPLetter === "ا" && nextPLetter === fathahan) {
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return PhonemeStatus.ShortAForAlefBeforeFathatan;
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}
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if (phoneme === "'" && currentPLetter === "و" && nextPLetter === "و") {
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return PhonemeStatus.GlottalStopBeforeOo;
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}
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if (phoneme === "oo" && previousPhoneme === "'" && currentPLetter === "و" && prevPLetter === hamzaAbove) {
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return PhonemeStatus.OoAfterGlottalStopOo;
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}
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if (phoneme === "'" && last(state.pOut, 2) === "ع" && isOutOfWord(last(state.pOut, 3))) {
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return PhonemeStatus.AinBeginningAfterShortVowel;
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}
|
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if (!isBeginningOfWord && phoneme === "aa" && currentPLetter === "و" && nextPLetter === "ا") {
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return PhonemeStatus.PersianSilentWWithAa;
|
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}
|
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if (!isBeginningOfWord && phoneme === "i" && currentPLetter === "ا" && nextPLetter === "ل") {
|
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return PhonemeStatus.ArabicWasla;
|
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}
|
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if (phoneme === "-i-" && isBeginningOfWord) {
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return PhonemeStatus.Izafe;
|
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}
|
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if (phoneme === "a" && currentPLetter === "أ") {
|
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return PhonemeStatus.AlefWithHamza;
|
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}
|
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if (phoneme === "'" && nextPhoneme === "a" && currentPLetter === "أ") {
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return PhonemeStatus.AlefWithHamzaWithGlottalStop;
|
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}
|
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if (currentPLetter === "ع" && phoneme !== "'" && nextPhoneme !== "'") {
|
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if (phonemeInfo.diacritic && !phonemeInfo.longVowel) {
|
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return PhonemeStatus.ShortAinVowelMissingComma;
|
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}
|
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if ((last(state.pOut, 2) === "ا") && isOutOfWord(last(state.pOut, 3))) {
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return PhonemeStatus.ShortAinVowelMissingCommaAfterAlefStart;
|
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}
|
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}
|
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if (useAinBlendDiacritics) {
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return PhonemeStatus.LongAinVowelMissingComma;
|
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}
|
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if (((!isBeginningOfWord && doubleConsonant) || prevPLetter === " ") && (previousPhoneme === phoneme) && !phonemeInfo.matches?.includes(currentPLetter)) {
|
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return PhonemeStatus.DoubleConsonantTashdeed;
|
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}
|
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if (phoneme === "aa" && currentPLetter === "ی" && nextPLetter === daggerAlif) {
|
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return PhonemeStatus.AlefDaggarEnding;
|
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}
|
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if (phoneme === "a" && lastWordEndedW("ح")) {
|
||
return PhonemeStatus.ShortAEndingAfterHeem;
|
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}
|
||
if (isEndOfWord && ((phoneme === "u" && currentPLetter === "ه") || (phoneme === "h" && ["ه", "ح"].includes(currentPLetter)))) {
|
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return needsSukun ? PhonemeStatus.EndingWithHeyHimFromSukun : PhonemeStatus.EndingWithHeyHim;
|
||
}
|
||
if ((phonemeInfo.matches?.includes(currentPLetter) || (isEndOfWord && phonemeInfo.endingMatches?.includes(currentPLetter)) || (phoneme === "m" && currentPLetter === "ن" && nextPLetter === "ب"))) {
|
||
return needsSukun ? PhonemeStatus.DirectMatchAfterSukun : PhonemeStatus.DirectMatch;
|
||
}
|
||
if (phonemeInfo.diacritic && !phonemeInfo.longVowel) {
|
||
return PhonemeStatus.ShortVowel;
|
||
}
|
||
if (phoneme === "o" && previousPhoneme === "w" && lastWordEndedW("و")) {
|
||
return PhonemeStatus.WoEndingO;
|
||
}
|
||
if (isEndOfWord && phoneme === "n" && currentPLetter === fathahan && prevPLetter === "ا") {
|
||
return PhonemeStatus.NOnFathatan;
|
||
}
|
||
// console.log("errored", "current", phoneme, "next", nextPhoneme);
|
||
// console.log("bad phoneme is ", phoneme);
|
||
throw new Error("phonetics error - no status found for phoneme: " + phoneme);
|
||
}
|
||
|
||
const phs = getPhonemeState();
|
||
|
||
return {
|
||
phs, phonemeInfo, diacritic, prevPLetter,
|
||
};
|
||
};
|
||
|
||
|
||
/**
|
||
* returns the nth last character of a string
|
||
*
|
||
* @param s
|
||
*/
|
||
export function last(s: string, n = 1) {
|
||
return s[s.length - n];
|
||
}
|
||
|
||
export function advanceP(state: DiacriticsAccumulator, n: number = 1): DiacriticsAccumulator {
|
||
return {
|
||
pIn: state.pIn.slice(n),
|
||
pOut: state.pOut + state.pIn.slice(0, n),
|
||
};
|
||
}
|
||
|
||
/**
|
||
* moves back to the last character that wasn't a " " or "."
|
||
*
|
||
* @param state
|
||
* @returns
|
||
*/
|
||
export function reverseP(state: DiacriticsAccumulator): DiacriticsAccumulator {
|
||
const reversed = [...state.pOut].reverse();
|
||
const howFar = reversed.findIndex((c) => ![" ", "."].includes(c));
|
||
return {
|
||
pIn: state.pOut.slice(-howFar) + state.pIn,
|
||
pOut: state.pOut.slice(0, -howFar),
|
||
};
|
||
}
|
||
|
||
export const addP = (toAdd: string | undefined) => (state: DiacriticsAccumulator): DiacriticsAccumulator => {
|
||
return {
|
||
...state,
|
||
pOut: toAdd ? (state.pOut + toAdd) : state.pOut,
|
||
};
|
||
};
|
||
|
||
export const overwriteP = (toWrite: string) => (state: DiacriticsAccumulator): DiacriticsAccumulator => {
|
||
return {
|
||
pIn: state.pIn.slice(1),
|
||
pOut: state.pOut + toWrite,
|
||
};
|
||
};
|
||
|
||
/**
|
||
* returns the last letter before any whitespace (" " / ".")
|
||
*
|
||
* @param s
|
||
* @returns
|
||
*/
|
||
export function lastNonWhitespace(s: string): string {
|
||
const reversed = [...s].reverse();
|
||
const lastIndex = reversed.findIndex((c) => ![" ", "."].includes(c));
|
||
const penultimateChar = reversed[lastIndex];
|
||
return penultimateChar;
|
||
}
|
||
|
||
export function getCurrentNext(state: DiacriticsAccumulator): { current: string, next: string} {
|
||
return {
|
||
current: state.pIn[0],
|
||
next: state.pIn[1],
|
||
};
|
||
}
|
||
|
||
// export function advanceForAin(state: DiacriticsAccumulator): DiacriticsAccumulator {
|
||
// const { current } = getCurrentNext(state);
|
||
// return (current === "ع") ? advanceP(state) : state;
|
||
// }
|
||
|
||
export function advanceForHamzaMid(state: DiacriticsAccumulator): DiacriticsAccumulator {
|
||
const { current, next } = getCurrentNext(state);
|
||
if (current === "ئ" && next && next !== "ئ") {
|
||
return advanceP(state);
|
||
}
|
||
return state;
|
||
}
|
||
|
||
export function advanceForHamza(state: DiacriticsAccumulator): DiacriticsAccumulator {
|
||
const { current, next } = getCurrentNext(state);
|
||
if (current === "ه" && (!next || next === " ")) {
|
||
return advanceP(state);
|
||
}
|
||
// if (current === "ع") {
|
||
// return advanceP(state);
|
||
// }
|
||
return state;
|
||
}
|
||
|