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

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

"use strict";

const Dependency = require("../Dependency");
const makeSerializable = require("../util/makeSerializable");
const ModuleDependency = require("./ModuleDependency");

/** @typedef {import("../ContextModule")} ContextModule */
/** @typedef {import("../Dependency").RawReferencedExports} RawReferencedExports */
/** @typedef {import("../Dependency").ReferencedExports} ReferencedExports */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */

class ContextElementDependency extends ModuleDependency {
        /**
         * Creates an instance of ContextElementDependency.
         * @param {string} request request
         * @param {string | undefined} userRequest user request
         * @param {string | undefined} typePrefix type prefix
         * @param {string} category category
         * @param {RawReferencedExports | null=} referencedExports referenced exports
         * @param {string=} context context
         * @param {ImportAttributes=} attributes import assertions
         */
        constructor(
                request,
                userRequest,
                typePrefix,
                category,
                referencedExports,
                context,
                attributes
        ) {
                super(request);

                if (userRequest) {
                        this.userRequest = userRequest;
                }

                this._typePrefix = typePrefix;
                this._category = category;
                this.referencedExports = referencedExports;
                this._context = context || undefined;
                this.attributes = attributes;
        }

        get type() {
                if (this._typePrefix) {
                        return `${this._typePrefix} context element`;
                }

                return "context element";
        }

        get category() {
                return this._category;
        }

        /**
         * Returns an identifier to merge equal requests.
         * @returns {string | null} an identifier to merge equal requests
         */
        getResourceIdentifier() {
                let str = super.getResourceIdentifier();
                if (this.attributes) {
                        str += `|attributes${JSON.stringify(this.attributes)}`;
                }
                return str;
        }

        /**
         * Returns list of exports referenced by this dependency
         * @param {ModuleGraph} moduleGraph module graph
         * @param {RuntimeSpec} runtime the runtime for which the module is analysed
         * @returns {ReferencedExports} referenced exports
         */
        getReferencedExports(moduleGraph, runtime) {
                if (!this.referencedExports) return Dependency.EXPORTS_OBJECT_REFERENCED;
                /** @type {ReferencedExports} */
                const refs = [];
                for (const referencedExport of this.referencedExports) {
                        if (
                                this._typePrefix === "import()" &&
                                referencedExport[0] === "default"
                        ) {
                                const selfModule =
                                        /** @type {ContextModule} */
                                        (moduleGraph.getParentModule(this));
                                const importedModule =
                                        /** @type {Module} */
                                        (moduleGraph.getModule(this));
                                const exportsType = importedModule.getExportsType(
                                        moduleGraph,
                                        selfModule.options.namespaceObject === "strict"
                                );
                                if (
                                        exportsType === "default-only" ||
                                        exportsType === "default-with-named"
                                ) {
                                        return Dependency.EXPORTS_OBJECT_REFERENCED;
                                }
                        }
                        refs.push({
                                name: referencedExport,
                                canMangle: false
                        });
                }
                return refs;
        }

        /**
         * Serializes this instance into the provided serializer context.
         * @param {ObjectSerializerContext} context context
         */
        serialize(context) {
                const { write } = context;
                write(this._typePrefix);
                write(this._category);
                write(this.referencedExports);
                write(this.attributes);
                super.serialize(context);
        }

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         */
        deserialize(context) {
                const { read } = context;
                this._typePrefix = read();
                this._category = read();
                this.referencedExports = read();
                this.attributes = read();
                super.deserialize(context);
        }
}

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

module.exports = ContextElementDependency;