source: frontend/node_modules/webpack/lib/dependencies/ExternalModuleDependency.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Ivan Kopeykin @vankop
*/

"use strict";

const makeSerializable = require("../util/makeSerializable");
const CachedConstDependency = require("./CachedConstDependency");
const ExternalModuleInitFragment = require("./ExternalModuleInitFragment");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("../dependencies/ExternalModuleInitFragment").ArrayImportSpecifiers} ArrayImportSpecifiers */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

class ExternalModuleDependency extends CachedConstDependency {
        /**
         * Creates an instance of ExternalModuleDependency.
         * @param {string} module module
         * @param {ArrayImportSpecifiers} importSpecifiers import specifiers
         * @param {string | undefined} defaultImport default import
         * @param {string} expression expression
         * @param {Range | null} range range
         * @param {string} identifier identifier
         * @param {number=} place place where we inject the expression
         */
        constructor(
                module,
                importSpecifiers,
                defaultImport,
                expression,
                range,
                identifier,
                place = CachedConstDependency.PLACE_MODULE
        ) {
                super(expression, range, identifier, place);

                this.importedModule = module;
                this.specifiers = importSpecifiers;
                this.default = defaultImport;
        }

        /**
         * Create hash update.
         * @returns {string} hash update
         */
        _createHashUpdate() {
                return `${this.importedModule}${JSON.stringify(this.specifiers)}${
                        this.default || "null"
                }${super._createHashUpdate()}`;
        }

        /**
         * Serializes this instance into the provided serializer context.
         * @param {ObjectSerializerContext} context context
         */
        serialize(context) {
                super.serialize(context);
                const { write } = context;
                write(this.importedModule);
                write(this.specifiers);
                write(this.default);
        }

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         */
        deserialize(context) {
                super.deserialize(context);
                const { read } = context;
                this.importedModule = read();
                this.specifiers = read();
                this.default = read();
        }
}

makeSerializable(
        ExternalModuleDependency,
        "webpack/lib/dependencies/ExternalModuleDependency"
);

ExternalModuleDependency.Template = class ExternalModuleDependencyTemplate extends (
        CachedConstDependency.Template
) {
        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Dependency} dependency the dependency for which the template should be applied
         * @param {ReplaceSource} source the current replace source which can be modified
         * @param {DependencyTemplateContext} templateContext the context object
         * @returns {void}
         */
        apply(dependency, source, templateContext) {
                super.apply(dependency, source, templateContext);
                const dep = /** @type {ExternalModuleDependency} */ (dependency);
                const { chunkInitFragments, runtimeTemplate } = templateContext;

                chunkInitFragments.push(
                        new ExternalModuleInitFragment(
                                `${runtimeTemplate.supportNodePrefixForCoreModules() ? "node:" : ""}${
                                        dep.importedModule
                                }`,
                                dep.specifiers,
                                dep.default
                        )
                );
        }
};

module.exports = ExternalModuleDependency;