✨(frontend) sync user and frontend language

On Language change in the frontend,
the user language is updated via API.
If user language is available, it will
be preferred and set in the frontend.

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to
 - 🚸(backend) improve users similarity search and sort results #391
 - ♻️(frontend) simplify stores #402
 - ✨(frontend) update $css Box props type to add styled components RuleSet #423
+- ✨(frontend) sync user and frontend language #401
 
 ## Fixed
 

src/backend/core/api/serializers.py

@@ -18,7 +18,7 @@ class UserSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = models.User
-        fields = ["id", "email", "full_name", "short_name"]
+        fields = ["id", "email", "full_name", "short_name", "language"]
         read_only_fields = ["id", "email", "full_name", "short_name"]
 
 

src/backend/demo/defaults.py

@@ -7,17 +7,12 @@
 }
 
 DEV_USERS = [
+    {"username": "impress", "email": "[email protected]", "language": "en-us"},
+    {"username": "user-e2e-webkit", "email": "[email protected]", "language": "en-us"},
+    {"username": "user-e2e-firefox", "email": "[email protected]", "language": "en-us"},
     {
-        "username": "impress",
-        "email": "[email protected]",
+        "username": "user-e2e-chromium",
+        "email": "[email protected]",
+        "language": "en-us",
     },
-    {
-        "username": "user-e2e-webkit",
-        "email": "[email protected]",
-    },
-    {
-        "username": "user-e2e-firefox",
-        "email": "[email protected]",
-    },
-    {"username": "user-e2e-chromium", "email": "[email protected]"},
 ]

src/backend/demo/management/commands/create_demo.py

@@ -172,7 +172,8 @@ def create_demo(stdout):
                     is_superuser=False,
                     is_active=True,
                     is_staff=False,
-                    language=random.choice(settings.LANGUAGES)[0],
+                    language=dev_user["language"]
+                    or random.choice(settings.LANGUAGES)[0],
                 )
             )
 

src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts

@@ -9,41 +9,6 @@ test.beforeEach(async ({ page }) => {
 });
 
 test.describe('Doc Editor', () => {
-  test('it check translations of the slash menu when changing language', async ({
-    page,
-    browserName,
-  }) => {
-    await createDoc(page, 'doc-toolbar', browserName, 1);
-
-    const header = page.locator('header').first();
-    const editor = page.locator('.ProseMirror');
-    // Trigger slash menu to show english menu
-    await editor.click();
-    await editor.fill('/');
-    await expect(page.getByText('Headings', { exact: true })).toBeVisible();
-    await header.click();
-    await expect(page.getByText('Headings', { exact: true })).toBeHidden();
-
-    // Reset menu
-    await editor.click();
-    await editor.fill('');
-
-    // Change language to French
-    await header.click();
-    await header.getByRole('combobox').getByText('English').click();
-    await header.getByRole('option', { name: 'Français' }).click();
-    await expect(
-      header.getByRole('combobox').getByText('Français'),
-    ).toBeVisible();
-
-    // Trigger slash menu to show french menu
-    await editor.click();
-    await editor.fill('/');
-    await expect(page.getByText('Titres', { exact: true })).toBeVisible();
-    await header.click();
-    await expect(page.getByText('Titres', { exact: true })).toBeHidden();
-  });
-
   test('it checks default toolbar buttons are displayed', async ({
     page,
     browserName,

src/frontend/apps/e2e/__tests__/app-impress/doc-member-create.spec.ts

@@ -111,19 +111,13 @@ test.describe('Document create member', () => {
     await expect(page.getByText(`Invitation sent to ${email}`)).toBeVisible();
     const responseCreateInvitation = await responsePromiseCreateInvitation;
     expect(responseCreateInvitation.ok()).toBeTruthy();
-    expect(
-      responseCreateInvitation.request().headers()['content-language'],
-    ).toBe('en-us');
 
     // Check user added
     await expect(
       page.getByText(`User ${user.email} added to the document.`),
     ).toBeVisible();
     const responseAddUser = await responsePromiseAddUser;
     expect(responseAddUser.ok()).toBeTruthy();
-    expect(responseAddUser.request().headers()['content-language']).toBe(
-      'en-us',
-    );
 
     const listInvitation = page.getByLabel('List invitation card');
     await expect(listInvitation.locator('li').getByText(email)).toBeVisible();
@@ -225,46 +219,6 @@ test.describe('Document create member', () => {
     expect(responseCreateInvitationFail.ok()).toBeFalsy();
   });
 
-  test('The invitation endpoint get the language of the website', async ({
-    page,
-    browserName,
-  }) => {
-    await createDoc(page, 'user-invitation', browserName, 1);
-
-    const header = page.locator('header').first();
-    await header.getByRole('combobox').getByText('EN').click();
-    await header.getByRole('option', { name: 'FR' }).click();
-
-    await page.getByRole('button', { name: 'Partager' }).click();
-
-    const inputSearch = page.getByLabel(
-      /Trouver un membre à ajouter au document/,
-    );
-
-    const email = randomName('[email protected]', browserName, 1)[0];
-    await inputSearch.fill(email);
-    await page.getByRole('option', { name: email }).click();
-
-    // Choose a role
-    await page.getByRole('combobox', { name: /Choisissez un rôle/ }).click();
-    await page.getByRole('option', { name: 'Administrateur' }).click();
-
-    const responsePromiseCreateInvitation = page.waitForResponse(
-      (response) =>
-        response.url().includes('/invitations/') && response.status() === 201,
-    );
-
-    await page.getByRole('button', { name: 'Valider' }).click();
-
-    // Check invitation sent
-    await expect(page.getByText(`Invitation envoyée à ${email}`)).toBeVisible();
-    const responseCreateInvitation = await responsePromiseCreateInvitation;
-    expect(responseCreateInvitation.ok()).toBeTruthy();
-    expect(
-      responseCreateInvitation.request().headers()['content-language'],
-    ).toBe('fr-fr');
-  });
-
   test('it manages invitation', async ({ page, browserName }) => {
     await createDoc(page, 'user-invitation', browserName, 1);
 

src/frontend/apps/e2e/__tests__/app-impress/language.spec.ts

@@ -1,20 +1,25 @@
 import { expect, test } from '@playwright/test';
 
+import { createDoc } from './common';
+
 test.beforeEach(async ({ page }) => {
   await page.goto('/');
 });
 
 test.describe('Language', () => {
-  test('checks the language picker', async ({ page }) => {
+  test('checks language switching', async ({ page }) => {
+    const header = page.locator('header').first();
+
+    // initial language should be english
     await expect(
       page.getByRole('button', {
         name: 'Create a new document',
       }),
     ).toBeVisible();
 
-    const header = page.locator('header').first();
-    await header.getByRole('combobox').getByText('English').click();
-    await header.getByRole('option', { name: 'Français' }).click();
+    // switch to french
+    await waitForLanguageSwitch(page, TestLanguage.French);
+
     await expect(
       header.getByRole('combobox').getByText('Français'),
     ).toBeVisible();
@@ -63,12 +68,80 @@ test.describe('Language', () => {
     // Check for English 404 response
     await check404Response('Not found.');
 
-    // Switch language to French
-    const header = page.locator('header').first();
-    await header.getByRole('combobox').getByText('English').click();
-    await header.getByRole('option', { name: 'Français' }).click();
+    await waitForLanguageSwitch(page, TestLanguage.French);
 
     // Check for French 404 response
     await check404Response('Pas trouvé.');
   });
+
+  test('it check translations of the slash menu when changing language', async ({
+    page,
+    browserName,
+  }) => {
+    await createDoc(page, 'doc-toolbar', browserName, 1);
+
+    const header = page.locator('header').first();
+    const editor = page.locator('.ProseMirror');
+    // Trigger slash menu to show english menu
+    await editor.click();
+    await editor.fill('/');
+    await expect(page.getByText('Headings', { exact: true })).toBeVisible();
+    await header.click();
+    await expect(page.getByText('Headings', { exact: true })).toBeHidden();
+
+    // Reset menu
+    await editor.click();
+    await editor.fill('');
+
+    // Change language to French
+    await waitForLanguageSwitch(page, TestLanguage.French);
+
+    // Trigger slash menu to show french menu
+    await editor.click();
+    await editor.fill('/');
+    await expect(page.getByText('Titres', { exact: true })).toBeVisible();
+    await header.click();
+    await expect(page.getByText('Titres', { exact: true })).toBeHidden();
+  });
 });
+
+test.afterEach(async ({ page }) => {
+  // Switch back to English - important for other tests to run as expected
+  await waitForLanguageSwitch(page, TestLanguage.English);
+});
+
+// language helper
+export const TestLanguage = {
+  English: {
+    label: 'English',
+    expectedLocale: ['en-us'],
+  },
+  French: {
+    label: 'Français',
+    expectedLocale: ['fr-fr'],
+  },
+} as const;
+
+type TestLanguageKey = keyof typeof TestLanguage;
+type TestLanguageValue = (typeof TestLanguage)[TestLanguageKey];
+
+export async function waitForLanguageSwitch(
+  page: Page,
+  lang: TestLanguageValue,
+) {
+  const header = page.locator('header').first();
+  await header.getByRole('combobox').click();
+
+  const [response] = await Promise.all([
+    page.waitForResponse(
+      (resp) =>
+        resp.url().includes('/user') && resp.request().method() === 'PATCH',
+    ),
+    header.getByRole('option', { name: lang.label }).click(),
+  ]);
+
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+  const updatedUserResponse = await response.json();
+
+  expect(lang.expectedLocale).toContain(updatedUserResponse.language);
+}

src/frontend/apps/impress/src/core/AppProvider.tsx

@@ -3,7 +3,6 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { useEffect } from 'react';
 
 import { useCunninghamTheme } from '@/cunningham';
-import '@/i18n/initI18n';
 import { useResponsiveStore } from '@/stores/';
 
 import { Auth } from './auth/';

src/frontend/apps/impress/src/core/auth/api/types.ts

@@ -4,10 +4,12 @@
  * @property {string} id - The id of the user.
  * @property {string} email - The email of the user.
  * @property {string} name - The name of the user.
+ * @property {string} language - The language of the user.
  */
 export interface User {
   id: string;
   email: string;
   full_name: string;
   short_name: string;
+  language: string;
 }

src/frontend/apps/impress/src/core/config/ConfigProvider.tsx

@@ -3,11 +3,15 @@ import { PropsWithChildren, useEffect } from 'react';
 
 import { Box } from '@/components';
 import { useCunninghamTheme } from '@/cunningham';
+import i18n from '@/i18n/initI18n';
 import { useSentryStore } from '@/stores/useSentryStore';
 
+import { useAuthStore } from '../auth';
+
 import { useConfig } from './api/useConfig';
 
 export const ConfigProvider = ({ children }: PropsWithChildren) => {
+  const { userData } = useAuthStore();
   const { data: conf } = useConfig();
   const { setSentry } = useSentryStore();
   const { setTheme } = useCunninghamTheme();
@@ -28,6 +32,23 @@ export const ConfigProvider = ({ children }: PropsWithChildren) => {
     setTheme(conf.FRONTEND_THEME);
   }, [conf?.FRONTEND_THEME, setTheme]);
 
+  useEffect(() => {
+    if (!userData?.language || !conf?.LANGUAGES) {
+      return;
+    }
+
+    conf.LANGUAGES.some(([available_lang]) => {
+      if (
+        userData.language === available_lang && // language is expected by user
+        i18n.language !== available_lang // language not set as expected
+      ) {
+        void i18n.changeLanguage(available_lang); // change language to expected
+        return true;
+      }
+      return false;
+    });
+  }, [conf?.LANGUAGES, userData?.language]);
+
   if (!conf) {
     return (
       <Box $height="100vh" $width="100vw" $align="center" $justify="center">

src/frontend/apps/impress/src/features/docs/doc-editor/components/BlockNoteEditor.tsx

@@ -103,7 +103,7 @@ export const BlockNoteEditor = ({
   } = useCreateDocAttachment();
   const { setHeadings, resetHeadings } = useHeadingStore();
   const { i18n } = useTranslation();
-  const lang = i18n.language;
+  const lang = i18n.resolvedLanguage;
 
   const uploadFile = useCallback(
     async (file: File) => {