util i18nUserSettingDetector.ts

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  import { Request, Response } from 'express'
import { LanguageDetectorInterfaceOptions } from 'i18next-express-middleware'
 
export default {
  name: 'userSettingDetector',
 
  lookup(req: Request, res: Response, options?: LanguageDetectorInterfaceOptions) {
    let lang = ''
    const { user } = req as any
 
    Iif (user) {
      if ('lang' in user) {
        lang = user.lang || null
      }
    }
 
    return lang
  },
 
  cacheUserlanguage(req, res, lng, options) {
    // nothing to do
  },
}