[RN] Fix passing config.js to JitsiMeetJS.init

react/features/base/lib-jitsi-meet/middleware.js

@@ -22,24 +22,44 @@ MiddlewareRegistry.register(store => next => action => {
         action.participant.local && store.dispatch(disposeLib());
         break;
 
-    case SET_CONFIG: {
-        const { dispatch, getState } = store;
-        const initialized
-            = getState()['features/base/lib-jitsi-meet'].initialized;
-
-        // XXX If we already have config, that means new config is coming, which
-        // means that we should dispose instance of lib initialized with
-        // previous config first.
-        // TODO Currently 'disposeLib' actually does not dispose lib-jitsi-meet.
-        // This functionality should be implemented.
-        const promise
-            = initialized ? dispatch(disposeLib()) : Promise.resolve();
-
-        promise.then(dispatch(initLib()));
-
-        break;
-    }
+    case SET_CONFIG:
+        return _setConfig(store, next, action);
     }
 
     return next(action);
 });
+
+/**
+ * Notifies the feature base/lib-jitsi-meet that the action SET_CONFIG is being
+ * dispatched within a specific Redux store.
+ *
+ * @param {Store} store - The Redux store in which the specified action is being
+ * dispatched.
+ * @param {Dispatch} next - The Redux dispatch function to dispatch the
+ * specified action to the specified store.
+ * @param {Action} action - The Redux action SET_CONFIG which is being
+ * dispatched in the specified store.
+ * @private
+ * @returns {Object} The new state that is the result of the reduction of the
+ * specified action.
+ */
+function _setConfig(store, next, action) {
+    const { dispatch, getState } = store;
+    const { initialized } = getState()['features/base/lib-jitsi-meet'];
+
+    // XXX Since the config is changing, the library lib-jitsi-meet must be
+    // initialized again with the new config. Consequntly, it may need to be
+    // disposed of first.
+    // TODO Currently, disposeLib actually does not dispose of lib-jitsi-meet
+    // because lib-jitsi-meet does not implement such functionality.
+    const disposeLIbPromise
+        = initialized ? dispatch(disposeLib()) : Promise.resolve();
+
+    // Let the new config into the Redux store (because initLib will read it
+    // from there).
+    const nextState = next(action);
+
+    disposeLIbPromise.then(dispatch(initLib()));
+
+    return nextState;
+}