forked from akai/readest
Huang Xin
51 lines
1.6 KiB
TypeScript
51 lines
1.6 KiB
TypeScript
export const localizeNumber = (num: number, language: string, isIndex = false): string => {
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const lang = language.toLowerCase();
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const isChinese = lang.startsWith('zh');
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if (!isChinese) {
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return num.toString();
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}
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const isTraditional = lang.includes('tw') || lang.includes('hk');
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const baseDigits = isTraditional ? '零壹貳叁肆伍陸柒捌玖' : '零一二三四五六七八九';
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const zeroChar = isIndex ? '〇' : '零';
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const digits = baseDigits.replace('零', zeroChar);
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const units = isTraditional
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? ['', '拾', '佰', '仟', '萬', '億']
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: ['', '十', '百', '千', '万', '亿'];
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const str = String(num);
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const len = str.length;
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let result = '';
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for (let i = 0; i < len; i++) {
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const n = Number(str[i]);
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const pos = len - i - 1;
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if (n !== 0) {
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result += digits[n]! + units[pos % 4]!;
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} else if (!result.endsWith(zeroChar) && i < len - 1) {
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result += zeroChar;
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}
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if (pos === 4) result += units[4];
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if (pos === 8) result += units[5];
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}
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result = result
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.replace(new RegExp(`${zeroChar}+$`), '')
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.replace(`${zeroChar}萬`, '萬')
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.replace(`${zeroChar}万`, '万')
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.replace(new RegExp(`${zeroChar}+`, 'g'), zeroChar);
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if (!isIndex) {
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if (isTraditional) {
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result = result
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.replace(/^貳$/, '兩')
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.replace(/(^|[^壹貳叁肆伍陸柒捌玖])貳([^佰仟萬億壹貳叁肆伍陸柒捌玖]|$)/g, '$1兩$2');
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} else {
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result = result
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.replace(/^二$/, '两')
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.replace(/(^|[^一二三四五六七八九])二([^百千万亿一二三四五六七八九]|$)/g, '$1两$2');
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}
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}
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return result;
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};
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