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