typedux/dist/umd/selectors/SelectorChain.js

Slightly adjusted Redux (awesome by default) for TS

var __read = (this && this.__read) || function (o, n) {
    var m = typeof Symbol === "function" && o[Symbol.iterator];
    if (!m) return o;
    var i = m.call(o), r, ar = [], e;
    try {
        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
    }
    catch (error) { e = { error: error }; }
    finally {
        try {
            if (r && !r.done && (m = i["return"])) m.call(i);
        }
        finally { if (e) throw e.error; }
    }
    return ar;
};
var __spread = (this && this.__spread) || function () {
    for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
    return ar;
};
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "@3fv/guard"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.selectorChain = void 0;
    var guard_1 = require("@3fv/guard");
    function continueSelectorChain(store, state, data, keyPath) {
        if (keyPath === void 0) { keyPath = []; }
        keyPath = keyPath || [];
        // noinspection DuplicatedCode
        var nextSelector = (function () {
            // TRACK FIRST PROP ACCESS
            var firstGet = keyPath.map(function () { return true; });
            // CHECK IF KEY SHOULD BE NUMBER
            function resolveKey(value, key, index) {
                if (firstGet[index]) {
                    if (Array.isArray(value)) {
                        var keyNum = guard_1.toNumber(key);
                        if (guard_1.isNumber(keyNum)) {
                            key = keyPath[index] = keyNum;
                        }
                    }
                    firstGet[index] = false;
                }
                return key;
            }
            function getterFn(state) {
                return keyPath.reduce(function (value, key, index) {
                    return value[resolveKey(value, key, index)];
                }, state);
            }
            var getter = Object.assign(getterFn, {
                subscribe: function (listener) {
                    return store.observe(getterFn, listener);
                }
            });
            return getter; // overrideCallback(getter, keyPath)
        });
        return (new Proxy(nextSelector, {
            get: function (target, key) {
                return continueSelectorChain(store, state, undefined, __spread(keyPath, [key]));
            }
        }));
    }
    //PropChainType<S, S,SelectorChainDataAccessor<S,S>>
    function selectorChain(store, state) {
        return continueSelectorChain(store, state, state);
    }
    exports.selectorChain = selectorChain;
});
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