typedux/dist/esm/util/PropertyChain.js

Slightly adjusted Redux (awesome by default) for TS

import { isNumber, toNumber } from "@3fv/guard";
export function continuePropertyChain(state, data, keyPath = []) {
    keyPath = keyPath || [];
    // noinspection DuplicatedCode
    return new Proxy((overrideCallback) => {
        // TRACK FIRST PROP ACCESS
        const firstGet = keyPath.map(() => true);
        // CHECK IF KEY SHOULD BE NUMBER
        function resolveKey(value, key, index) {
            if (firstGet[index]) {
                if (Array.isArray(value)) {
                    const keyNum = toNumber(key);
                    if (isNumber(keyNum)) {
                        key = keyPath[index] = keyNum;
                    }
                }
                firstGet[index] = false;
            }
            return key;
        }
        const getter = (state) => keyPath.reduce((value, key, index) => {
            return value[resolveKey(value, key, index)];
        }, state);
        return overrideCallback(getter, keyPath);
    }, {
        get: (target, key) => {
            return continuePropertyChain(state, undefined, [...keyPath, key]);
        }
    });
}
/**
 * Start a new prop chain of the type specified
 *
 * @param state
 */
export function propertyChain(state = undefined) {
    return continuePropertyChain(state, state);
}
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