/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Ivan Kopeykin @vankop
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*/
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"use strict";
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const InitFragment = require("../InitFragment");
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const makeSerializable = require("../util/makeSerializable");
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("../Generator").GenerateContext} GenerateContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
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/** @typedef {Map<string, Set<string>>} ImportSpecifiers */
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/**
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* @extends {InitFragment<GenerateContext>}
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*/
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class ExternalModuleInitFragment extends InitFragment {
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/**
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* @param {string} importedModule imported module
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* @param {Array<{ name: string, value?: string }> | ImportSpecifiers} specifiers import specifiers
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* @param {string=} defaultImport default import
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*/
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constructor(importedModule, specifiers, defaultImport) {
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super(
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undefined,
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InitFragment.STAGE_CONSTANTS,
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0,
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`external module imports|${importedModule}|${defaultImport || "null"}`
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);
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this.importedModule = importedModule;
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if (Array.isArray(specifiers)) {
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/** @type {ImportSpecifiers} */
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this.specifiers = new Map();
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for (const { name, value } of specifiers) {
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let specifiers = this.specifiers.get(name);
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if (!specifiers) {
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specifiers = new Set();
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this.specifiers.set(name, specifiers);
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}
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specifiers.add(value || name);
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}
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} else {
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this.specifiers = specifiers;
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}
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this.defaultImport = defaultImport;
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}
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/**
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* @param {ExternalModuleInitFragment} other other
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* @returns {ExternalModuleInitFragment} ExternalModuleInitFragment
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*/
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merge(other) {
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const newSpecifiersMap = new Map(this.specifiers);
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for (const [name, specifiers] of other.specifiers) {
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if (newSpecifiersMap.has(name)) {
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const currentSpecifiers =
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/** @type {Set<string>} */
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(newSpecifiersMap.get(name));
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for (const spec of specifiers) currentSpecifiers.add(spec);
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} else {
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newSpecifiersMap.set(name, specifiers);
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}
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}
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return new ExternalModuleInitFragment(
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this.importedModule,
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newSpecifiersMap,
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this.defaultImport
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);
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}
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/**
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* @param {GenerateContext} context context
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* @returns {string | Source | undefined} the source code that will be included as initialization code
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*/
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getContent({ runtimeRequirements }) {
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const namedImports = [];
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for (const [name, specifiers] of this.specifiers) {
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for (const spec of specifiers) {
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if (spec === name) {
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namedImports.push(name);
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} else {
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namedImports.push(`${name} as ${spec}`);
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}
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}
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}
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let importsString =
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namedImports.length > 0 ? `{${namedImports.join(",")}}` : "";
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if (this.defaultImport) {
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importsString = `${this.defaultImport}${
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importsString ? `, ${importsString}` : ""
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}`;
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}
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return `import ${importsString} from ${JSON.stringify(
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this.importedModule
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)};`;
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}
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/**
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* @param {ObjectSerializerContext} context context
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*/
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serialize(context) {
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super.serialize(context);
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const { write } = context;
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write(this.importedModule);
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write(this.specifiers);
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write(this.defaultImport);
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}
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/**
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* @param {ObjectDeserializerContext} context context
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*/
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deserialize(context) {
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super.deserialize(context);
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const { read } = context;
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this.importedModule = read();
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this.specifiers = read();
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this.defaultImport = read();
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}
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}
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makeSerializable(
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ExternalModuleInitFragment,
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"webpack/lib/dependencies/ExternalModuleInitFragment"
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);
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module.exports = ExternalModuleInitFragment;
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