feat: include query parameters in locale redirect (#6132)

* feat: include query parameters in locale redirect

* refactor: code cleanup

---------

Co-authored-by: Nicolas Giard <github@ngpixel.com>

server/controllers/common.js

@@ -4,6 +4,7 @@ const pageHelper = require('../helpers/page')
 const _ = require('lodash')
 const CleanCSS = require('clean-css')
 const moment = require('moment')
+const qs = require('querystring')
 
 /* global WIKI */
 
@@ -420,7 +421,8 @@ router.get('/*', async (req, res, next) => {
 
   if (isPage) {
     if (WIKI.config.lang.namespacing && !pageArgs.explicitLocale) {
-      return res.redirect(`/${pageArgs.locale}/${pageArgs.path}`)
+      const query = !_.isEmpty(req.query) ? `?${qs.stringify(req.query)}` : ''
+      return res.redirect(`/${pageArgs.locale}/${pageArgs.path}${query}`)
     }
 
     req.i18n.changeLanguage(pageArgs.locale)