source: frontend/node_modules/webpack/lib/LoaderOptionsPlugin.js

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

"use strict";

const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
const NormalModule = require("./NormalModule");

/** @typedef {import("../declarations/plugins/LoaderOptionsPlugin").LoaderOptionsPluginOptions} LoaderOptionsPluginOptions */
/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./ModuleFilenameHelpers").MatchObject} MatchObject  */

/**
 * Defines the loader context type used by this module.
 * @template T
 * @typedef {import("../declarations/LoaderContext").LoaderContext<T>} LoaderContext
 */

const PLUGIN_NAME = "LoaderOptionsPlugin";

class LoaderOptionsPlugin {
        /**
         * Creates an instance of LoaderOptionsPlugin.
         * @param {LoaderOptionsPluginOptions & MatchObject} options options object
         */
        constructor(options = {}) {
                // If no options are set then generate empty options object
                if (typeof options !== "object") options = {};
                if (!options.test) {
                        options.test = () => true;
                }
                /** @type {LoaderOptionsPluginOptions & MatchObject} */
                this.options = options;
        }

        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.validate.tap(PLUGIN_NAME, () => {
                        compiler.validate(
                                () => require("../schemas/plugins/LoaderOptionsPlugin.json"),
                                this.options,
                                {
                                        name: "Loader Options Plugin",
                                        baseDataPath: "options"
                                },
                                (options) =>
                                        require("../schemas/plugins/LoaderOptionsPlugin.check")(options)
                        );
                });

                compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
                        NormalModule.getCompilationHooks(compilation).loader.tap(
                                PLUGIN_NAME,
                                (context, module) => {
                                        const resource = module.resource;
                                        if (!resource) return;
                                        const i = resource.indexOf("?");
                                        if (
                                                ModuleFilenameHelpers.matchObject(
                                                        this.options,
                                                        i < 0 ? resource : resource.slice(0, i)
                                                )
                                        ) {
                                                for (const key of Object.keys(this.options)) {
                                                        if (key === "include" || key === "exclude" || key === "test") {
                                                                continue;
                                                        }

                                                        /** @type {LoaderContext<EXPECTED_ANY> & Record<string, EXPECTED_ANY>} */
                                                        (context)[key] = this.options[key];
                                                }
                                        }
                                }
                        );
                });
        }
}

module.exports = LoaderOptionsPlugin;