snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

react/features/base/i18n/middleware.ts

@@ -0,0 +1,76 @@
+import { SET_DYNAMIC_BRANDING_DATA } from '../../dynamic-branding/actionTypes';
+import { getConferenceState } from '../conference/functions';
+import { SET_CONFIG } from '../config/actionTypes';
+import MiddlewareRegistry from '../redux/MiddlewareRegistry';
+
+import { I18NEXT_INITIALIZED, LANGUAGE_CHANGED } from './actionTypes';
+import { changeLanguageBundle } from './functions';
+import i18next, { SUPPORTED_NS } from './i18next';
+import logger from './logger';
+
+/**
+ * Implements the entry point of the middleware of the feature base/i18n.
+ *
+ * @param {Store} store - The redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(store => next => action => {
+    switch (action.type) {
+    case SET_CONFIG: {
+        // When config.js is fetched asynchronously (no window.config at boot),
+        // configLanguageDetector returns undefined and i18next falls back. Once
+        // the store has the config, apply its defaultLanguage if it differs
+        // from what i18next picked.
+        const defaultLanguage = action.config?.defaultLanguage;
+
+        if (defaultLanguage && defaultLanguage !== i18next.language) {
+            i18next.changeLanguage(defaultLanguage).catch(err => {
+                logger.log('Error applying defaultLanguage from config', err);
+            });
+        }
+        break;
+    }
+    case I18NEXT_INITIALIZED:
+    case LANGUAGE_CHANGED:
+    case SET_DYNAMIC_BRANDING_DATA: {
+        const { language } = i18next;
+        const data = action.type === SET_DYNAMIC_BRANDING_DATA
+            ? action.value
+            : store.getState()['features/dynamic-branding'];
+        const labels = data?.labels;
+
+        if (language && labels?.[language]) {
+            changeLanguageBundle(language, labels[language])
+            .catch(err => {
+                logger.log('Error setting dynamic language bundle', err);
+            });
+        }
+
+        SUPPORTED_NS.forEach(ns => {
+            const nsLabels = data?.[`labels-${ns}`];
+
+            if (language && nsLabels?.[language]) {
+                changeLanguageBundle(language, nsLabels[language], ns)
+                    .catch(err => {
+                        logger.log(`Error setting dynamic language bundle for ${ns}`, err);
+                    });
+            }
+        });
+
+        // Update transcription language, if applicable.
+        if (action.type === SET_DYNAMIC_BRANDING_DATA) {
+            const { defaultTranscriptionLanguage } = action.value;
+
+            if (typeof defaultTranscriptionLanguage !== 'undefined') {
+                const { conference } = getConferenceState(store.getState());
+
+                conference?.setTranscriptionLanguage(defaultTranscriptionLanguage);
+            }
+        }
+
+        break;
+    }
+    }
+
+    return next(action);
+});