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4e1096a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | import { detectLanguage, getLanguageInfo, isSameLang, isValidLang } from '@/utils/lang';
import type { Transformer } from './types';
export const languageTransformer: Transformer = {
name: 'language',
transform: async (ctx) => {
const primaryLanguage = ctx.primaryLanguage;
let result = ctx.content;
const attrsMatch = result.match(/<html\b([^>]*)>/i);
if (attrsMatch) {
let attrs = attrsMatch[1] || '';
const langRegex = / lang="([^"]*)"/i;
const xmlLangRegex = / xml:lang="([^"]*)"/i;
const xmlLangMatch = attrs.match(xmlLangRegex);
const langMatch = attrs.match(langRegex);
const docLang = langMatch?.[1] || xmlLangMatch?.[1];
if (!isValidLang(docLang) || !isSameLang(docLang, primaryLanguage)) {
const mainContent = result.replace(/<[^>]+>/g, ' ');
const lang =
isValidLang(primaryLanguage) && primaryLanguage !== 'en'
? primaryLanguage
: detectLanguage(mainContent);
const languageInfo = getLanguageInfo(lang || '');
const newLangAttr = ` lang="${lang}"`;
const newXmlLangAttr = ` xml:lang="${lang}"`;
const dirAttr = languageInfo?.direction === 'rtl' ? ' dir="rtl"' : '';
attrs = langMatch ? attrs.replace(langRegex, newLangAttr) : attrs + newLangAttr + dirAttr;
attrs = xmlLangMatch
? attrs.replace(xmlLangRegex, newXmlLangAttr)
: attrs + newXmlLangAttr + dirAttr;
result = result.replace(attrsMatch[0], `<html${attrs}>`);
}
} else {
const lang =
isValidLang(primaryLanguage) && primaryLanguage !== 'en'
? primaryLanguage
: detectLanguage(result.replace(/<[^>]+>/g, ' '));
const languageInfo = getLanguageInfo(lang || '');
const dirAttr = languageInfo?.direction === 'rtl' ? ' dir="rtl"' : '';
const newAttrs = ` lang="${lang}" xml:lang="${lang}" ${dirAttr}`;
result = result.replace(/<html>/i, `<html${newAttrs}>`);
}
return result;
},
};
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