cherrypick/locales/index.js

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/**
* Languages Loader
*/
const fs = require('fs');
const yaml = require('js-yaml');
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const merge = (...args) => args.reduce((a, c) => ({
...a,
...c,
...Object.entries(a)
.filter(([k]) => c && typeof c[k] === 'object')
.reduce((a, [k, v]) => (a[k] = merge(v, c[k]), a), {})
}), {});
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const languages = [
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'ar-SA',
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'cs-CZ',
'da-DK',
'de-DE',
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'en-US',
'es-ES',
'fr-FR',
'id-ID',
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'it-IT',
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'ja-JP',
'ja-KS',
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'kab-KAB',
'kn-IN',
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'ko-KR',
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'nl-NL',
'no-NO',
'pl-PL',
'pt-PT',
'ru-RU',
'sk-SK',
'th-TH',
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'ug-CN',
'uk-UA',
'vi-VN',
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'zh-CN',
'zh-TW',
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];
const primaries = {
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'en': 'US',
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'ja': 'JP',
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'ko': 'KR',
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'zh': 'CN',
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};
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// 何故か文字列にバックスペース文字が混入することがあり、YAMLが壊れるので取り除く
const clean = (text) => text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '');
const locales = languages.reduce((a, c) => (a[c] = yaml.load(clean(fs.readFileSync(`${__dirname}/${c}.yml`, 'utf-8'))) || {}, a), {});
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module.exports = Object.entries(locales)
.reduce((a, [k ,v]) => (a[k] = (() => {
const [lang] = k.split('-');
switch (k) {
case 'ja-JP': return v;
case 'ja-KS':
case 'en-US': return merge(locales['ja-JP'], v);
default: return merge(
locales['ja-JP'],
locales['en-US'],
locales[`${lang}-${primaries[lang]}`] || {},
v
);
}
})(), a), {});