frontend/middleware.ts (view raw)
1import {getToken} from 'next-auth/jwt';
2import {NextRequest, NextResponse} from 'next/server';
3import {
4 ProfileDocument,
5 Enum_Userspermissionsuser_Lang as SupportedLocales,
6} from './generated/graphql';
7import {print} from 'graphql/language/printer';
8import {getCookie} from './lib/cookies';
9
10const PUBLIC_FILE = /\.(.*)$/;
11const FALLBACK_LANGUAGE = process.env.FALLBACK_LANGUAGE || 'en';
12
13export async function middleware(req: NextRequest) {
14 const isIgnoredPath =
15 req.nextUrl.pathname.startsWith('/_next') ||
16 req.nextUrl.pathname.includes('/api/') ||
17 req.nextUrl.pathname.startsWith('/graphql') ||
18 PUBLIC_FILE.test(req.nextUrl.pathname);
19
20 if (isIgnoredPath) return null;
21
22 const locale = await getRegisteredUserLanguage(req) ||
23 getCookie('NEXT_LOCALE', req.headers.get('cookie')) ||
24 getBrowserPreferredSupportedLanguage(req) ||
25 FALLBACK_LANGUAGE;
26
27 if (req.nextUrl.locale !== locale) {
28 return NextResponse.redirect(
29 new URL(
30 `/${locale}${req.nextUrl.pathname}${req.nextUrl.search || ''}`,
31 req.url
32 )
33 );
34 }
35}
36
37const getRegisteredUserLanguage = async (req) => {
38 const token = await getToken({
39 req,
40 secret: process.env.NEXTAUTH_SECRET,
41 });
42
43 const {STRAPI_URL = 'http://localhost:1337'} = process.env;
44 return fetch(`${STRAPI_URL}/graphql/`, {
45 method: 'POST',
46 headers: {
47 'Content-Type': 'application/json',
48 authorization: token?.jwt ? `Bearer ${token.jwt}` : '',
49 },
50 body: JSON.stringify({query: print(ProfileDocument)}),
51 })
52 .then(async response => {
53 const {data} = await response.json();
54 return data?.me?.profile?.lang;
55 })
56 .catch(console.error);
57};
58
59const getBrowserPreferredSupportedLanguage = (req): SupportedLocales => {
60 const browserAcceptedLanguages = req.headers
61 .get('accept-language')
62 ?.split(',');
63 let browserPreferredSupportedLanguage = null;
64 browserAcceptedLanguages?.every(locale => {
65 const lang = locale.split('-')?.[0].toLowerCase();
66
67 if (Object.keys(SupportedLocales).includes(lang)) {
68 browserPreferredSupportedLanguage = lang;
69 } else {
70 return false;
71 }
72 });
73 return browserPreferredSupportedLanguage;
74};