refract-redux-xstream/index.es.js

Refract bindings for Redux with xstream: harness the power of reactive programming to supercharge your components!

import xs from 'xstream';
import dropRepeats from 'xstream/extra/dropRepeats';

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Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0

THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.

See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */

var __assign = Object.assign || function __assign(t) {
    for (var s, i = 1, n = arguments.length; i < n; i++) {
        s = arguments[i];
        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
    }
    return t;
};

var observeFactory = function (store) {
    return function (actionOrSelector) {
        if (typeof actionOrSelector === 'string') {
            var unsubscribe_1;
            return xs.create({
                start: function (listener) {
                    unsubscribe_1 = store.addActionListener(actionOrSelector, listener.next.bind(listener));
                },
                stop: function () {
                    unsubscribe_1();
                }
            });
        }
        if (typeof actionOrSelector === 'function') {
            return xs
                .from(store)
                .map(actionOrSelector)
                .compose(dropRepeats());
        }
    };
};

var defaultOptions = {
    eventsPrefix: '@@event/',
    methodName: 'observe'
};
function refractStoreEnhancer(options) {
    if (options === void 0) { options = {}; }
    var opts = __assign({}, defaultOptions, options);
    return function (createStore) { return function (reducer, initialState, enhancer) {
        var actionListeners = {};
        var store = createStore(reducer, initialState, enhancer);
        var dispatch = store.dispatch;
        store.dispatch = function (action) {
            var result;
            var hasType = action && action.type;
            var isEvent = opts.eventsPrefix &&
                hasType &&
                action.type.indexOf(opts.eventsPrefix) === 0;
            if (!isEvent) {
                result = dispatch(action);
            }
            if (hasType && actionListeners[action.type]) {
                actionListeners[action.type].forEach(function (listener) {
                    return listener(action);
                });
            }
            return result;
        };
        store.addActionListener = function (actionType, listener) {
            actionListeners[actionType] = (actionListeners[actionType] || []).concat(listener);
            return function () {
                actionListeners[actionType] = actionListeners[actionType].filter(function (l) { return listener !== l; });
            };
        };
        store[opts.methodName] = observeFactory(store);
        return store;
    }; };
}

export { refractStoreEnhancer as refractEnhancer };