@rxap/utilities/src/lib/flatten-object.js

A collection of utility functions, types and interfaces.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.flattenObject = flattenObject;
/**
 * This function takes an object and flattens it into a single-level object.
 * Nested properties are represented with dot notation in the resulting object.
 *
 * @export
 * @function flattenObject
 * @param {any} obj - The object to be flattened. This can be of any type, but non-object types will result in an empty object.
 * @param {string} [prefix=''] - An optional prefix to prepend to all property keys in the flattened object. Default is an empty string.
 *
 * @returns {any} - The flattened object. Each key in the returned object represents a path to a property in the original object, with nested properties represented in dot notation. The value of each key is the value of the corresponding property in the original object.
 *
 * @example
 * // returns { 'a.b': 1, 'a.c': 2, d: 3 }
 * flattenObject({ a: { b: 1, c: 2 }, d: 3 });
 *
 * @example
 * // returns { 'prefix.a.b': 1, 'prefix.a.c': 2, 'prefix.d': 3 }
 * flattenObject({ a: { b: 1, c: 2 }, d: 3 }, 'prefix');
 */
function flattenObject(obj, prefix = '') {
    return Object.keys(obj).reduce((acc, k) => {
        const pre = prefix.length ? prefix + '.' : '';
        if (typeof obj[k] === 'object') {
            Object.assign(acc, flattenObject(obj[k], pre + k));
        }
        else {
            acc[pre + k] = obj[k];
        }
        return acc;
    }, {});
}
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