'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _actions = require('./actions');

var _constants = require('./constants');

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

function swallow() {}

function warnAboutConfusingFiltering(blacklist, whitelist) {
    blacklist.filter(function (item) {
        return whitelist.indexOf(item) !== -1;
    }).forEach(function (item) {
        console.warn( // eslint-disable-line no-console
        '[redux-storage] Action ' + item + ' is on BOTH black- and whitelist.' + ' This is most likely a mistake!');
    });
}

exports.default = function (engine) {
    var actionBlacklist = arguments.length <= 1 || arguments[1] === undefined ? [] : arguments[1];
    var actionWhitelist = arguments.length <= 2 || arguments[2] === undefined ? [] : arguments[2];

    // Also don't save if we process our own actions
    var blacklistedActions = [].concat(_toConsumableArray(actionBlacklist), [_constants.LOAD, _constants.SAVE]);

    if (process.env.NODE_ENV !== 'production') {
        warnAboutConfusingFiltering(actionBlacklist, actionWhitelist);
    }

    return function (_ref) {
        var dispatch = _ref.dispatch;
        var getState = _ref.getState;

        return function (next) {
            return function (action) {
                var result = next(action);

                var isOnBlacklist = blacklistedActions.indexOf(action.type) !== -1;
                var isOnWhitelist = actionWhitelist.length === 0 ? true // Don't filter if the whitelist is empty
                : actionWhitelist.indexOf(action.type) !== -1;

                // Skip blacklisted actions
                if (!isOnBlacklist && isOnWhitelist) {
                    (function () {
                        var saveState = getState();
                        var dispatchSave = function dispatchSave() {
                            return dispatch((0, _actions.save)(saveState));
                        };
                        engine.save(saveState).then(dispatchSave)['catch'](swallow);
                    })();
                }

                return result;
            };
        };
    };
};
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