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

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

"use strict";

const makeSerializable = require("../util/makeSerializable");
const HarmonyExportInitFragment = require("./HarmonyExportInitFragment");
const NullDependency = require("./NullDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("./HarmonyExportInitFragment").UnusedExports} UnusedExports */
/** @typedef {import("./HarmonyExportInitFragment").ExportMap} ExportMap */

class HarmonyExportSpecifierDependency extends NullDependency {
        /**
         * Creates an instance of HarmonyExportSpecifierDependency.
         * @param {string} id the id
         * @param {string} name the name
         */
        constructor(id, name) {
                super();
                this.id = id;
                this.name = name;
        }

        get type() {
                return "harmony export specifier";
        }

        /**
         * Returns the exported names
         * @param {ModuleGraph} moduleGraph module graph
         * @returns {ExportsSpec | undefined} export names
         */
        getExports(moduleGraph) {
                return {
                        exports: [this.name],
                        priority: 1,
                        terminalBinding: true,
                        dependencies: undefined
                };
        }

        /**
         * Gets module evaluation side effects state.
         * @param {ModuleGraph} moduleGraph the module graph
         * @returns {ConnectionState} how this dependency connects the module to referencing modules
         */
        getModuleEvaluationSideEffectsState(moduleGraph) {
                return false;
        }

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

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

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

HarmonyExportSpecifierDependency.Template = class HarmonyExportSpecifierDependencyTemplate extends (
        NullDependency.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,
                { module, moduleGraph, initFragments, runtime, concatenationScope }
        ) {
                const dep = /** @type {HarmonyExportSpecifierDependency} */ (dependency);
                if (concatenationScope) {
                        concatenationScope.registerExport(dep.name, dep.id);
                        return;
                }
                const used = moduleGraph
                        .getExportsInfo(module)
                        .getUsedName(dep.name, runtime);
                if (!used) {
                        /** @type {UnusedExports} */
                        const set = new Set();
                        set.add(dep.name || "namespace");
                        initFragments.push(
                                new HarmonyExportInitFragment(module.exportsArgument, undefined, set)
                        );
                        return;
                }

                /** @type {ExportMap} */
                const map = new Map();
                map.set(used, `/* binding */ ${dep.id}`);
                initFragments.push(
                        new HarmonyExportInitFragment(module.exportsArgument, map, undefined)
                );
        }
};

module.exports = HarmonyExportSpecifierDependency;