🌐(i18n) create package i18n

The package i18n will handle the
internationalization of the applications.
It will parse the frontend code and extract
the translations to be send to the crowdin
platform.

src/frontend/packages/i18n/__tests__/translations.test.ts

@@ -0,0 +1,47 @@
+import { execSync } from 'child_process';
+import fs from 'fs';
+
+describe('checks all the frontend translation are made', () => {
+  it('checks missing translation. If this test fails, go to https://crowdin.com/', () => {
+    // Extract the translations
+    execSync(
+      'yarn extract-translation:impress -c ./i18next-parser.config.jest.mjs',
+    );
+    const outputCrowdin = './locales/impress/translations-crowdin.json';
+    const jsonCrowdin = JSON.parse(fs.readFileSync(outputCrowdin, 'utf8'));
+    const listKeysCrowdin = Object.keys(jsonCrowdin).sort();
+
+    // Check the translations in the app impress
+    const outputimpress = '../../apps/impress/src/i18n/translations.json';
+    const jsonimpress = JSON.parse(fs.readFileSync(outputimpress, 'utf8'));
+
+    // Our keys are in english, so we don't need to check the english translation
+    Object.keys(jsonimpress)
+      .filter((key) => key !== 'en')
+      .forEach((key) => {
+        const listKeysimpress = Object.keys(jsonimpress[key].translation).sort();
+        const missingKeys = listKeysCrowdin.filter(
+          (element) => !listKeysimpress.includes(element),
+        );
+        const additionalKeys = listKeysimpress.filter(
+          (element) => !listKeysCrowdin.includes(element),
+        );
+
+        if (missingKeys.length > 0) {
+          console.log(
+            `Missing keys in impress translations that should be translated in Crowdin, got to https://crowdin.com/ :`,
+            missingKeys,
+          );
+        }
+
+        if (additionalKeys.length > 0) {
+          console.log(
+            `Additional keys in impress translations that seems not present in this branch:`,
+            additionalKeys,
+          );
+        }
+
+        expect(missingKeys.length).toBe(0);
+      });
+  });
+});