@rxx/core/lib/production/reducer.js

React MVI micro framework.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var flatscan_1 = require("./observable/flatscan");
var SystemEvent;
(function (SystemEvent) {
    SystemEvent["REPLACE_STATE"] = "@System::replace-state";
})(SystemEvent = exports.SystemEvent || (exports.SystemEvent = {}));
function reducer(source, handler, initial, options) {
    return source.pipe(flatscan_1.flatScan(function (state, payload) {
        if (payload.type === SystemEvent.REPLACE_STATE) {
            return payload.payload.state;
        }
        return handler(state, payload);
    }, initial, options));
}
exports.reducer = reducer;