source: frontend/node_modules/enhanced-resolve/lib/ModulesInHierarchicalDirectoriesPlugin.js

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

"use strict";

const { modulesResolveHandler } = require("./ModulesUtils");

/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */

module.exports = class ModulesInHierarchicalDirectoriesPlugin {
        /**
         * @param {string | ResolveStepHook} source source
         * @param {string | string[]} directories directories
         * @param {string | ResolveStepHook} target target
         */
        constructor(source, directories, target) {
                this.source = source;
                this.directories = /** @type {string[]} */ [...directories];
                this.target = target;
        }

        /**
         * @param {Resolver} resolver the resolver
         * @returns {void}
         */
        apply(resolver) {
                const target = resolver.ensureHook(this.target);
                resolver
                        .getHook(this.source)
                        .tapAsync(
                                "ModulesInHierarchicalDirectoriesPlugin",
                                (request, resolveContext, callback) => {
                                        modulesResolveHandler(
                                                resolver,
                                                this.directories,
                                                target,
                                                request,
                                                resolveContext,
                                                callback,
                                        );
                                },
                        );
        }
};