stapp-select/lib/select.js

Select module for stapp - modular state manager

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var stapp_1 = require("stapp");
var constants_1 = require("./constants");
exports.select = function (_a) {
    var name = _a.name, selector = _a.selector, reactOn = _a.reactOn, _b = _a.reactWith, reactWith = _b === void 0 ? [] : _b;
    var _c;
    var selected = stapp_1.createEvent(constants_1.SELECT + "/" + name + ": State was selected");
    var selectReducer = stapp_1.createReducer(null).on(selected, function (state, selectResult) { return selectResult || state; });
    var eventFilter = stapp_1.select(reactOn.concat(stapp_1.initEvent));
    var events = [selected].concat(reactWith);
    var reactEpic = function (event$, _, _a) {
        var getState = _a.getState;
        return event$.pipe(operators_1.filter(eventFilter), operators_1.map(function () { return selector(getState()); }), operators_1.mergeMap(function (result) {
            return rxjs_1.from(events.map(function (eventCreator) { return eventCreator(result); }));
        }));
    };
    return {
        name: constants_1.SELECT + "/" + name,
        state: (_c = {},
            _c[name] = selectReducer,
            _c),
        epic: reactEpic,
        useGlobalObservableConfig: false
    };
};
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