Merge pull request #51 from datopian/feature/i18n-next10

Configure i18n for Portaljs

packages/portal/README.md

@@ -1,8 +1,8 @@
 <h1 align="center">
 
-  🌀 Portal.JS<br/>
+🌀 Portal.JS<br/>
-  The javascript framework for<br/>
+The javascript framework for<br/>
-  data portals
+data portals
 
 </h1>
 
@@ -102,6 +102,61 @@ Note that we don't have Apollo Server but we connect CKAN API using [`apollo-lin
 
 For development/debugging purposes, we suggest installing the Chrome extension - https://chrome.google.com/webstore/detail/apollo-client-developer-t/jdkknkkbebbapilgoeccciglkfbmbnfm.
 
+#### i18n configuration
+
+Portal.js is configured by default to support both `English` and `French` subpath for language translation. But for subsequent users, this following steps can be used to configure i18n for other languages;
+
+1.  Update ` next.config.js`, to add more languages to the i18n locales
+
+```js
+i18n: {
+  locales: ['en', 'fr', 'nl-NL'], // add more language to the list
+  defaultLocale: 'en',  // set the default language to use
+},
+```
+
+2. Create a folder for the language in `locales` --> `locales/en-Us`
+
+3. In the language folder, different namespace files (json) can be created for each translation. For the `index.js` use-case, I named it `common.json`
+
+```json
+// locales/en/common.json
+{
+   "title" : "Portal js in English",
+}
+
+// locales/fr/common.json
+{
+   "title" : "Portal js in French",
+}
+```
+
+4. To use on pages using Server-side Props.
+
+```js
+import { loadNamespaces } from './_app';
+import useTranslation from 'next-translate/useTranslation';
+
+const Home: React.FC = ()=> {
+  const { t } = useTranslation();
+  return (
+    <div>{t(`common:title`)}</div> // we use common and title base on the common.json data
+  );
+};
+
+export const getServerSideProps: GetServerSideProps = async ({ locale }) => {
+      ........  ........
+  return {
+    props : {
+      _ns:  await loadNamespaces(['common'], locale),
+    }
+  };
+};
+
+```
+
+5. Go to the browser and view the changes using language subpath like this `http://localhost:3000` and `http://localhost:3000/fr`. **Note** The subpath also activate chrome language Translator
+
 #### Pre-fetch data in the server-side
 
 When visiting a dataset page, you may want to fetch the dataset metadata in the server-side. To do so, you can use `getServerSideProps` function from NextJS:

packages/portal/jest.config.js

@@ -16,7 +16,7 @@ module.exports = {
     '<rootDir>/postcss.config.js',
   ],
   transform: {
-    '^.+\\.(js|jsx|ts|tsx)$': '<rootDir>/node_modules/babel-jest',
+    '^.+\\.(js|jsx|ts|tsx)$': 'babel-jest',
     '^.+\\.css$': '<rootDir>/config/jest/cssTransform.js',
   },
   transformIgnorePatterns: [

packages/portal/locales/en/common.json

@@ -0,0 +1,4 @@
+{
+  "title": "Portal in English",
+  "description": "At Datahub, we have over thousands of datasets for free and a Premium Data Service for additional or customised data with guaranteed updates."
+}

packages/portal/locales/fr/common.json

@@ -0,0 +1,4 @@
+{
+  "title": "Portal in french",
+  "description": "Chez Datahub, nous avons plus de milliers d'ensembles de données gratuitement et un service de données Premium pour des données supplémentaires ou personnalisées avec des mises à jour garanties."
+}

packages/portal/next.config.js

@@ -25,6 +25,10 @@ module.exports = (phase, { defaultConfig }) => {
     }
 
     return {
+      i18n: {
+        locales: ['en', 'fr', 'nl-NL'],
+        defaultLocale: 'en',
+      },
       publicRuntimeConfig: {
         DMS: dms ? dms.replace(/\/?$/, '') : 'http://mock.ckan',
         CMS: cms ? cms.replace(/\/?$/, '') : 'oddk.home.blog',
@@ -32,6 +36,10 @@ module.exports = (phase, { defaultConfig }) => {
     };
   }
   return {
+    i18n: {
+      locales: ['en', 'fr', 'nl-NL'],
+      defaultLocale: 'en',
+    },
     publicRuntimeConfig: {
       DMS: dms ? dms.replace(/\/?$/, '') : 'https://demo.ckan.org',
       CMS: cms ? cms.replace(/\/?$/, '') : 'oddk.home.blog',

packages/portal/package.json

@@ -38,7 +38,8 @@
     "graphql-tag": "^2.10.3",
     "html-react-parser": "^0.13.0",
     "markdown-it": "^11.0.0",
-    "next": "9.4.2",
+    "next": "^10.0.3",
+    "next-translate": "^0.20.2",
     "qs": "^6.9.4",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",

packages/portal/pages/_app.tsx

@@ -3,9 +3,27 @@ import { ApolloProvider } from '@apollo/react-hooks';
 import { useApollo } from '../lib/apolloClient';
 import { DEFAULT_THEME } from '../themes';
 import { applyTheme } from '../themes/utils';
-
+import I18nProvider from 'next-translate/I18nProvider';
+import { useRouter } from 'next/router';
 import '../styles/app.css';
 
+interface I8nObject {
+  [property: string]: any;
+}
+
+export async function loadNamespaces(
+  namespaces: string[],
+  lang: string
+): Promise<I8nObject> {
+  const res = {};
+  for (const ns of namespaces) {
+    res[ns] = await import(`../locales/${lang}/${ns}.json`).then(
+      (m) => m.default
+    );
+  }
+  return res;
+}
+
 type Props = {
   Component: any;
   pageProps: any;
@@ -14,6 +32,7 @@ type Props = {
 const MyApp: React.FC<Props> = ({ Component, pageProps }) => {
   const apolloClient = useApollo(pageProps.initialApolloState);
   const [theme] = useState(DEFAULT_THEME); // setTheme
+  const router = useRouter();
 
   useEffect(() => {
     /**
@@ -25,9 +44,11 @@ const MyApp: React.FC<Props> = ({ Component, pageProps }) => {
   }, [theme]);
 
   return (
+    <I18nProvider lang={router.locale} namespaces={pageProps._ns}>
       <ApolloProvider client={apolloClient}>
         <Component {...pageProps} />
       </ApolloProvider>
+    </I18nProvider>
   );
 };
 

packages/portal/pages/index.tsx

@@ -5,11 +5,20 @@ import Nav from '../components/home/Nav';
 import Recent from '../components/home/Recent';
 import Form from '../components/search/Form';
 import { SEARCH_QUERY } from '../graphql/queries';
+import { loadNamespaces } from './_app';
+import useTranslation from 'next-translate/useTranslation';
 
-const Home: React.FC = () => (
+const Home: React.FC<{ locale: any; locales: any }> = ({
+  locale,
+  locales,
+}) => {
+  const { t } = useTranslation();
+
+  return (
+    <>
       <div className="container mx-auto">
         <Head>
-      <title>Portal</title>
+          <title>{t(`common:title`)}</title>
           <link rel="icon" href="/favicon.ico" />
         </Head>
         <Nav />
@@ -20,9 +29,7 @@ const Home: React.FC = () => (
               <span className="text-orange-500">Datahub</span>
             </h1>
             <p className="text-md font-light mb-3 w-4/5">
-          At Datahub, we have over thousands of datasets for free and a Premium
+              {t(`common:description`)}
-          Data Service for additional or customised data with guaranteed
-          updates.
             </p>
             <Form />
           </div>
@@ -32,9 +39,14 @@ const Home: React.FC = () => (
         </section>
         <Recent />
       </div>
-);
+    </>
+  );
+};
 
-export const getServerSideProps: GetServerSideProps = async () => {
+export const getServerSideProps: GetServerSideProps = async ({
+  locale,
+  locales,
+}) => {
   const apolloClient = initializeApollo();
 
   await apolloClient.query({
@@ -48,6 +60,9 @@ export const getServerSideProps: GetServerSideProps = async () => {
   return {
     props: {
       initialApolloState: apolloClient.cache.extract(),
+      _ns: await loadNamespaces(['common'], locale),
+      locale,
+      locales,
     },
   };
 };