@nteract/myths/lib/reducer.js

A redux-observable framework for better locality of dependencies

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeRootReducer = exports.makeReducer = void 0;
const immutable_1 = __importDefault(require("immutable"));
exports.makeReducer = (reduce, appliesTo) => reduce === undefined
    ? (state, _action) => state
    : (state, action) => {
        if (appliesTo(action)) {
            return (reduce(state, action) || state);
        }
        else {
            return state;
        }
    };
exports.makeRootReducer = (myths, initialState) => (state = immutable_1.default.Record(initialState)(), action) => {
    const applicableMyths = Object
        .values(myths)
        .filter(myth => myth.appliesTo(action));
    if (applicableMyths.length === 0) {
        return state;
    }
    else if (applicableMyths[0].reduce === undefined) {
        return state;
    }
    else {
        return applicableMyths[0].reduce(state, action);
    }
};
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