31 lines
888 B
JavaScript
31 lines
888 B
JavaScript
const languageCodes = Object.keys(require('../lib/languages'))
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const codes = {
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zh: 'cn',
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'zh-hk': 'cn',
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'zh-cn': 'cn',
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'zh-sq': 'zh-SQ',
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'zh-tw': 'zh-TW'
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}
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function convertLanguageCode (language) {
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const languageLowerCase = language.toLowerCase()
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return codes[languageLowerCase] || languageLowerCase.substring(0, 2)
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}
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module.exports = function detectLanguage (req, res, next) {
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// determine language code from first part of URL, or default to English
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// /en/articles/foo
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// ^^
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const firstPartOfPath = req.path.split('/')[1]
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req.language = languageCodes.includes(firstPartOfPath) ? firstPartOfPath : 'en'
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// Detecting browser language by user preference + value
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if (req.headers['accept-language']) {
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const browserLanguage = req.headers['accept-language'].split(';')[0]
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req.userLanguage = convertLanguageCode(browserLanguage)
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}
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return next()
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}
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