source: trip-planner-front/node_modules/webpack/lib/container/options.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

/** @template T @typedef {(string | Record<string, string | string[] | T>)[] | Record<string, string | string[] | T>} ContainerOptionsFormat */

/**
 * @template T
 * @template N
 * @param {ContainerOptionsFormat<T>} options options passed by the user
 * @param {function(string | string[], string) : N} normalizeSimple normalize a simple item
 * @param {function(T, string) : N} normalizeOptions normalize a complex item
 * @param {function(string, N): void} fn processing function
 * @returns {void}
 */
const process = (options, normalizeSimple, normalizeOptions, fn) => {
        const array = items => {
                for (const item of items) {
                        if (typeof item === "string") {
                                fn(item, normalizeSimple(item, item));
                        } else if (item && typeof item === "object") {
                                object(item);
                        } else {
                                throw new Error("Unexpected options format");
                        }
                }
        };
        const object = obj => {
                for (const [key, value] of Object.entries(obj)) {
                        if (typeof value === "string" || Array.isArray(value)) {
                                fn(key, normalizeSimple(value, key));
                        } else {
                                fn(key, normalizeOptions(value, key));
                        }
                }
        };
        if (!options) {
                return;
        } else if (Array.isArray(options)) {
                array(options);
        } else if (typeof options === "object") {
                object(options);
        } else {
                throw new Error("Unexpected options format");
        }
};

/**
 * @template T
 * @template R
 * @param {ContainerOptionsFormat<T>} options options passed by the user
 * @param {function(string | string[], string) : R} normalizeSimple normalize a simple item
 * @param {function(T, string) : R} normalizeOptions normalize a complex item
 * @returns {[string, R][]} parsed options
 */
const parseOptions = (options, normalizeSimple, normalizeOptions) => {
        /** @type {[string, R][]} */
        const items = [];
        process(options, normalizeSimple, normalizeOptions, (key, value) => {
                items.push([key, value]);
        });
        return items;
};

/**
 * @template T
 * @param {string} scope scope name
 * @param {ContainerOptionsFormat<T>} options options passed by the user
 * @returns {Record<string, string | string[] | T>} options to spread or pass
 */
const scope = (scope, options) => {
        /** @type {Record<string, string | string[] | T>} */
        const obj = {};
        process(
                options,
                item => /** @type {string | string[] | T} */ (item),
                item => /** @type {string | string[] | T} */ (item),
                (key, value) => {
                        obj[
                                key.startsWith("./") ? `${scope}${key.slice(1)}` : `${scope}/${key}`
                        ] = value;
                }
        );
        return obj;
};

exports.parseOptions = parseOptions;
exports.scope = scope;