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

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

"use strict";

const DelegatedModule = require("./DelegatedModule");

// options.source
// options.type
// options.context
// options.scope
// options.content
// options.associatedObjectForCache
class DelegatedModuleFactoryPlugin {
        constructor(options) {
                this.options = options;
                options.type = options.type || "require";
                options.extensions = options.extensions || ["", ".js", ".json", ".wasm"];
        }

        apply(normalModuleFactory) {
                const scope = this.options.scope;
                if (scope) {
                        normalModuleFactory.hooks.factorize.tapAsync(
                                "DelegatedModuleFactoryPlugin",
                                (data, callback) => {
                                        const [dependency] = data.dependencies;
                                        const { request } = dependency;
                                        if (request && request.startsWith(`${scope}/`)) {
                                                const innerRequest = "." + request.substr(scope.length);
                                                let resolved;
                                                if (innerRequest in this.options.content) {
                                                        resolved = this.options.content[innerRequest];
                                                        return callback(
                                                                null,
                                                                new DelegatedModule(
                                                                        this.options.source,
                                                                        resolved,
                                                                        this.options.type,
                                                                        innerRequest,
                                                                        request
                                                                )
                                                        );
                                                }
                                                for (let i = 0; i < this.options.extensions.length; i++) {
                                                        const extension = this.options.extensions[i];
                                                        const requestPlusExt = innerRequest + extension;
                                                        if (requestPlusExt in this.options.content) {
                                                                resolved = this.options.content[requestPlusExt];
                                                                return callback(
                                                                        null,
                                                                        new DelegatedModule(
                                                                                this.options.source,
                                                                                resolved,
                                                                                this.options.type,
                                                                                requestPlusExt,
                                                                                request + extension
                                                                        )
                                                                );
                                                        }
                                                }
                                        }
                                        return callback();
                                }
                        );
                } else {
                        normalModuleFactory.hooks.module.tap(
                                "DelegatedModuleFactoryPlugin",
                                module => {
                                        const request = module.libIdent(this.options);
                                        if (request) {
                                                if (request in this.options.content) {
                                                        const resolved = this.options.content[request];
                                                        return new DelegatedModule(
                                                                this.options.source,
                                                                resolved,
                                                                this.options.type,
                                                                request,
                                                                module
                                                        );
                                                }
                                        }
                                        return module;
                                }
                        );
                }
        }
}
module.exports = DelegatedModuleFactoryPlugin;