romaji-to-kana-ng/fesm2015/romaji-to-kana-ng.js

Angular module providing a pipe for converting romaji to kana

import { Pipe, NgModule } from '@angular/core';

const kanaMap = {
    // standard hiragana
    'nn': 'ん', 'wa': 'わ', 'ra': 'ら', 'ya': 'や', 'ma': 'ま', 'ba': 'ば', 'ha': 'は', 'na': 'な', 'da': 'だ', 'ta': 'た', 'za': 'ざ', 'sa': 'さ', 'ga': 'が', 'ka': 'か', 'a': 'あ',
    'ri': 'り', 'mi': 'み', 'bi': 'び', 'hi': 'ひ', 'ni': 'に', 'di': 'ぢ', 'chi': 'ち', 'ji': 'じ', 'shi': 'し', 'gi': 'ぎ', 'ki': 'き', 'i': 'い',
    'ru': 'る', 'yu': 'ゆ', 'mu': 'む', 'bu': 'ぶ', 'fu': 'ふ', 'nu': 'ぬ', 'du': 'づ', 'tsu': 'つ', 'zu': 'ず', 'su': 'す', 'gu': 'ぐ', 'ku': 'く', 'u': 'う',
    're': 'れ', 'me': 'め', 'be': 'べ', 'he': 'へ', 'ne': 'ね', 'de': 'で', 'te': 'て', 'ze': 'ぜ', 'se': 'せ', 'ge': 'げ', 'ke': 'け', 'e': 'え',
    'wo': 'を', 'ro': 'ろ', 'yo': 'よ', 'mo': 'も', 'bo': 'ぼ', 'ho': 'ほ', 'no': 'の', 'do': 'ど', 'to': 'と', 'zo': 'ぞ', 'so': 'そ', 'go': 'ご', 'ko': 'こ', 'o': 'お',
    // little ya, yu, and yo
    'kya': 'きゃ', 'kyu': 'きゅ', 'kyo': 'きょ',
    'gya': 'ぎゃ', 'gyu': 'ぎゅ', 'gyo': 'ぎょ',
    'sya': 'しゃ', 'syu': 'しゅ', 'syo': 'しょ',
    'jya': 'じゃ', 'jyu': 'じゅ', 'jyo': 'じょ',
    'cya': 'ちゃ', 'cyu': 'ちゅ', 'cyo': 'ちょ',
    'nya': 'にゃ', 'nyu': 'にゅ', 'nyo': 'にょ',
    'hya': 'ひゃ', 'hyu': 'ひゅ', 'hyo': 'ひょ',
    'bya': 'びゃ', 'byu': 'びゅ', 'byo': 'びょ',
    'mya': 'みゃ', 'myu': 'みゅ', 'myo': 'みょ',
    'pya': 'ぴゃ', 'pyu': 'ぴゅ', 'pyo': 'ぴょ',
    'rya': 'りゃ', 'ryu': 'りゅ', 'ryo': 'りょ',
    // standard katakana
    'NN': 'ン', 'WA': 'ワ', 'RA': 'ラ', 'YA': 'ヤ', 'MA': 'マ', 'BA': 'バ', 'HA': 'ハ', 'NA': 'ナ', 'DA': 'ダ', 'TA': 'タ', 'ZA': 'ザ', 'SA': 'サ', 'GA': 'ガ', 'KA': 'カ', 'A': 'ア',
    'RI': 'リ', 'MI': 'ミ', 'BI': 'ビ', 'HI': 'ヒ', 'NI': 'ニ', 'DI': 'ヂ', 'CHI': 'チ', 'JI': 'ジ', 'SHI': 'シ', 'GI': 'ギ', 'KI': 'キ', 'I': 'イ',
    'RU': 'ル', 'YU': 'ユ', 'MU': 'ム', 'BU': 'ブ', 'FU': 'フ', 'NU': 'ヌ', 'DU': 'ヅ', 'TSU': 'ツ', 'ZU': 'ズ', 'SU': 'ス', 'GU': 'グ', 'KU': 'ク', 'U': 'ウ',
    'RE': 'レ', 'ME': 'メ', 'BE': 'ベ', 'HE': 'ヘ', 'NE': 'ネ', 'DE': 'デ', 'TE': 'テ', 'ZE': 'ゼ', 'SE': 'セ', 'GE': 'ゲ', 'KE': 'ケ', 'E': 'エ',
    'WO': 'ヲ', 'RO': 'ロ', 'YO': 'ヨ', 'MO': 'モ', 'BO': 'ボ', 'HO': 'ホ', 'NO': 'ノ', 'DO': 'ド', 'TO': 'ト', 'ZO': 'ゾ', 'SO': 'ソ', 'GO': 'ゴ', 'KO': 'コ', 'O': 'オ',
    // little ya yu and yo katakana
    'KYA': 'キャ', 'KYU': 'キュ', 'KYO': 'キョ',
    'GYA': 'ギャ', 'GYU': 'ギュ', 'GYO': 'ギョ',
    'SYA': 'シャ', 'SYU': 'シュ', 'SYO': 'ショ',
    'JYA': 'ジャ', 'JYU': 'ジュ', 'JYO': 'ジョ',
    'CYA': 'チャ', 'CYU': 'チュ', 'CYO': 'チョ',
    'NYA': 'ニャ', 'NYU': 'ニュ', 'NYO': 'ニョ',
    'HYA': 'ヒャ', 'HYU': 'ヒュ', 'HYO': 'ヒョ',
    'BYA': 'ビャ', 'BYU': 'ビュ', 'BYO': 'ビョ',
    'MYA': 'ミャ', 'MYU': 'ミュ', 'MYO': 'ミョ',
    'PYA': 'ピャ', 'PYU': 'ピュ', 'PYO': 'ピョ',
    'RYA': 'リャ', 'RYU': 'リュ', 'RYO': 'リョ',
    // others
    '-': 'ー' // long vowel
};
const katakanaRegExp = /[\u30a0-\u30ff]/g; // matches only katakana characters
const specialCharAndKanaRegExp = /[!@#$%^&*(),.?":{}|<>\ _\u3040-\u30ff]/g; // matches kana and special characters
class RomajiToKanaPipe {
    transform(value, ...args) {
        if (!value)
            return;
        let acc = '';
        let valueArr = value.split('');
        let result = '';
        while (valueArr.length) {
            acc += valueArr.shift();
            // if the acc contains a kana character or a special character reset acc and continue
            if (acc.match(specialCharAndKanaRegExp)) {
                result += acc;
                acc = '';
                continue;
            }
            // check if there is mixed casing
            if (acc.match(/[a-z]/g) && acc.match(/[A-Z]/g)) {
                result += acc[0];
                acc = acc.slice(1);
            }
            const mappedValue = kanaMap[acc];
            if (!!mappedValue) {
                result += mappedValue;
                acc = '';
            }
            else if (acc.length == 3) {
                // logic for a double consonant
                // check if the top is equal to the next char
                if (acc[0] == acc[1]) {
                    const mappedTail = kanaMap[acc.slice(1)];
                    if (!!mappedTail) {
                        result += this.makeDoubleConsonant(mappedTail);
                        acc = '';
                        continue;
                    }
                    else {
                        // peek at the next character
                        const nextChar = valueArr.slice(0, 1); // using a slice since we don't know if there actually is another character
                        const fourCharMatch = kanaMap[acc.slice(1).concat(...nextChar)];
                        // we found something like jjya or ggya
                        if (!!fourCharMatch) {
                            result += this.makeDoubleConsonant(fourCharMatch);
                            acc = '';
                            valueArr.shift(); // remove the character we peeked at
                            continue;
                        }
                    }
                }
                // attempt one last match before giving up on these 3
                const match = kanaMap[acc.slice(1)];
                // this will occur if we have something like kga
                result += acc[0];
                if (!!match) {
                    result += match;
                    acc = '';
                    continue;
                }
                else {
                    // remove the first character and allow this set to go through another pass
                    // we might have a 3 character match like gya coming up
                    acc = acc.slice(1);
                    continue;
                }
            }
        }
        // add any leftovers to the result and return it
        return result + acc;
    }
    makeDoubleConsonant(kana) {
        // choose which little tsu to use based on if it is katakana
        return kana.match(katakanaRegExp) ? `ッ${kana}` : `っ${kana}`;
    }
}
RomajiToKanaPipe.decorators = [
    { type: Pipe, args: [{
                name: 'romajiToKana'
            },] }
];

class KanaPipeNgModule {
}
KanaPipeNgModule.decorators = [
    { type: NgModule, args: [{
                declarations: [RomajiToKanaPipe],
                imports: [],
                exports: [RomajiToKanaPipe]
            },] }
];

/*
 * Public API Surface of romaji-to-kana
 */

/**
 * Generated bundle index. Do not edit.
 */

export { KanaPipeNgModule, RomajiToKanaPipe };
//# sourceMappingURL=romaji-to-kana-ng.js.map