jiti-meet/react/features/base/config/middleware.js

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// @flow
import { MiddlewareRegistry } from '../redux';
import { SET_CONFIG } from './actionTypes';
/**
* The middleware of the feature {@code base/config}.
*
* @param {Store} store - The redux store.
* @private
* @returns {Function}
*/
MiddlewareRegistry.register(store => next => action => {
switch (action.type) {
case SET_CONFIG:
return _setConfig(store, next, action);
}
return next(action);
});
/**
* Notifies the feature {@code base/config} that the {@link SET_CONFIG} redux
* action is being {@code dispatch}ed in a specific redux store.
*
* @param {Store} store - The redux store in which the specified {@code action}
* is being dispatched.
* @param {Dispatch} next - The redux {@code dispatch} function to dispatch the
* specified {@code action} in the specified {@code store}.
* @param {Action} action - The redux action which is being {@code dispatch}ed
* in the specified {@code store}.
* @private
* @returns {*} The return value of {@code next(action)}.
*/
function _setConfig({ getState }, next, action) {
// The reducer is doing some alterations to the config passed in the action,
// so make sure it's the final state by waiting for the action to be
// reduced.
const result = next(action);
// FIXME On Web we rely on the global 'config' variable which gets altered
// multiple times, before it makes it to the reducer. At some point it may
// not be the global variable which is being modified anymore due to
// different merge methods being used along the way. The global variable
// must be synchronized with the final state resolved by the reducer.
if (typeof window.config !== 'undefined') {
window.config = getState()['features/base/config'];
}
return result;
}