@nteract/myths/lib/epics.js

A redux-observable framework for better locality of dependencies

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeMakeRootEpic = exports.makeEpics = void 0;
const redux_observable_1 = require("redux-observable");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const makeEpic = (pkg, myth, dispatch, filterBy) => (action$, state$) => action$.pipe(filterBy, operators_1.withLatestFrom(state$.pipe(operators_1.map(state => state.__private__[pkg]))), operators_1.mergeMap(([action, state]) => { var _a; return (_a = dispatch(action, state, myth)) !== null && _a !== void 0 ? _a : rxjs_1.EMPTY; }));
exports.makeEpics = (pkg, myth, definition) => {
    var _a, _b;
    const epics = [];
    for (const { when, dispatch } of (_a = definition.andAlso) !== null && _a !== void 0 ? _a : []) {
        epics.push(makeEpic(pkg, myth, dispatch, operators_1.filter(when)));
    }
    for (const dispatch of (_b = definition.thenDispatch) !== null && _b !== void 0 ? _b : []) {
        epics.push(makeEpic(pkg, myth, dispatch, redux_observable_1.ofType(myth.type)));
    }
    return epics;
};
exports.makeMakeRootEpic = (myths) => () => redux_observable_1.combineEpics(...Object.values(myths).map(myth => redux_observable_1.combineEpics(...myth.epics)));
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