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(/]*)>/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], ``); } } 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(//i, ``); } return result; }, };