source: trip-planner-front/node_modules/webpack/lib/container/ContainerEntryModule.js@ 571e0df

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra, Zackary Jackson @ScriptedAlchemy, Marais Rossouw @maraisr
*/

"use strict";

const { OriginalSource, RawSource } = require("webpack-sources");
const AsyncDependenciesBlock = require("../AsyncDependenciesBlock");
const Module = require("../Module");
const RuntimeGlobals = require("../RuntimeGlobals");
const Template = require("../Template");
const makeSerializable = require("../util/makeSerializable");
const ContainerExposedDependency = require("./ContainerExposedDependency");

/** @typedef {import("../../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../ChunkGroup")} ChunkGroup */
/** @typedef {import("../Compilation")} Compilation */
/** @typedef {import("../Module").CodeGenerationContext} CodeGenerationContext */
/** @typedef {import("../Module").CodeGenerationResult} CodeGenerationResult */
/** @typedef {import("../Module").LibIdentOptions} LibIdentOptions */
/** @typedef {import("../Module").NeedBuildContext} NeedBuildContext */
/** @typedef {import("../RequestShortener")} RequestShortener */
/** @typedef {import("../ResolverFactory").ResolverWithOptions} ResolverWithOptions */
/** @typedef {import("../WebpackError")} WebpackError */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/fs").InputFileSystem} InputFileSystem */
/** @typedef {import("./ContainerEntryDependency")} ContainerEntryDependency */

/**
 * @typedef {Object} ExposeOptions
 * @property {string[]} import requests to exposed modules (last one is exported)
 * @property {string} name custom chunk name for the exposed module
 */

const SOURCE_TYPES = new Set(["javascript"]);

class ContainerEntryModule extends Module {
        /**
         * @param {string} name container entry name
         * @param {[string, ExposeOptions][]} exposes list of exposed modules
         * @param {string} shareScope name of the share scope
         */
        constructor(name, exposes, shareScope) {
                super("javascript/dynamic", null);
                this._name = name;
                this._exposes = exposes;
                this._shareScope = shareScope;
        }

        /**
         * @returns {Set<string>} types available (do not mutate)
         */
        getSourceTypes() {
                return SOURCE_TYPES;
        }

        /**
         * @returns {string} a unique identifier of the module
         */
        identifier() {
                return `container entry (${this._shareScope}) ${JSON.stringify(
                        this._exposes
                )}`;
        }

        /**
         * @param {RequestShortener} requestShortener the request shortener
         * @returns {string} a user readable identifier of the module
         */
        readableIdentifier(requestShortener) {
                return `container entry`;
        }

        /**
         * @param {LibIdentOptions} options options
         * @returns {string | null} an identifier for library inclusion
         */
        libIdent(options) {
                return `webpack/container/entry/${this._name}`;
        }

        /**
         * @param {NeedBuildContext} context context info
         * @param {function(WebpackError=, boolean=): void} callback callback function, returns true, if the module needs a rebuild
         * @returns {void}
         */
        needBuild(context, callback) {
                return callback(null, !this.buildMeta);
        }

        /**
         * @param {WebpackOptions} options webpack options
         * @param {Compilation} compilation the compilation
         * @param {ResolverWithOptions} resolver the resolver
         * @param {InputFileSystem} fs the file system
         * @param {function(WebpackError=): void} callback callback function
         * @returns {void}
         */
        build(options, compilation, resolver, fs, callback) {
                this.buildMeta = {};
                this.buildInfo = {
                        strict: true,
                        topLevelDeclarations: new Set(["moduleMap", "get", "init"])
                };

                this.clearDependenciesAndBlocks();

                for (const [name, options] of this._exposes) {
                        const block = new AsyncDependenciesBlock(
                                {
                                        name: options.name
                                },
                                { name },
                                options.import[options.import.length - 1]
                        );
                        let idx = 0;
                        for (const request of options.import) {
                                const dep = new ContainerExposedDependency(name, request);
                                dep.loc = {
                                        name,
                                        index: idx++
                                };

                                block.addDependency(dep);
                        }
                        this.addBlock(block);
                }

                callback();
        }

        /**
         * @param {CodeGenerationContext} context context for code generation
         * @returns {CodeGenerationResult} result
         */
        codeGeneration({ moduleGraph, chunkGraph, runtimeTemplate }) {
                const sources = new Map();
                const runtimeRequirements = new Set([
                        RuntimeGlobals.definePropertyGetters,
                        RuntimeGlobals.hasOwnProperty,
                        RuntimeGlobals.exports
                ]);
                const getters = [];

                for (const block of this.blocks) {
                        const { dependencies } = block;

                        const modules = dependencies.map(dependency => {
                                const dep = /** @type {ContainerExposedDependency} */ (dependency);
                                return {
                                        name: dep.exposedName,
                                        module: moduleGraph.getModule(dep),
                                        request: dep.userRequest
                                };
                        });

                        let str;

                        if (modules.some(m => !m.module)) {
                                str = runtimeTemplate.throwMissingModuleErrorBlock({
                                        request: modules.map(m => m.request).join(", ")
                                });
                        } else {
                                str = `return ${runtimeTemplate.blockPromise({
                                        block,
                                        message: "",
                                        chunkGraph,
                                        runtimeRequirements
                                })}.then(${runtimeTemplate.returningFunction(
                                        runtimeTemplate.returningFunction(
                                                `(${modules
                                                        .map(({ module, request }) =>
                                                                runtimeTemplate.moduleRaw({
                                                                        module,
                                                                        chunkGraph,
                                                                        request,
                                                                        weak: false,
                                                                        runtimeRequirements
                                                                })
                                                        )
                                                        .join(", ")})`
                                        )
                                )});`;
                        }

                        getters.push(
                                `${JSON.stringify(modules[0].name)}: ${runtimeTemplate.basicFunction(
                                        "",
                                        str
                                )}`
                        );
                }

                const source = Template.asString([
                        `var moduleMap = {`,
                        Template.indent(getters.join(",\n")),
                        "};",
                        `var get = ${runtimeTemplate.basicFunction("module, getScope", [
                                `${RuntimeGlobals.currentRemoteGetScope} = getScope;`,
                                // reusing the getScope variable to avoid creating a new var (and module is also used later)
                                "getScope = (",
                                Template.indent([
                                        `${RuntimeGlobals.hasOwnProperty}(moduleMap, module)`,
                                        Template.indent([
                                                "? moduleMap[module]()",
                                                `: Promise.resolve().then(${runtimeTemplate.basicFunction(
                                                        "",
                                                        "throw new Error('Module \"' + module + '\" does not exist in container.');"
                                                )})`
                                        ])
                                ]),
                                ");",
                                `${RuntimeGlobals.currentRemoteGetScope} = undefined;`,
                                "return getScope;"
                        ])};`,
                        `var init = ${runtimeTemplate.basicFunction("shareScope, initScope", [
                                `if (!${RuntimeGlobals.shareScopeMap}) return;`,
                                `var oldScope = ${RuntimeGlobals.shareScopeMap}[${JSON.stringify(
                                        this._shareScope
                                )}];`,
                                `var name = ${JSON.stringify(this._shareScope)}`,
                                `if(oldScope && oldScope !== shareScope) throw new Error("Container initialization failed as it has already been initialized with a different share scope");`,
                                `${RuntimeGlobals.shareScopeMap}[name] = shareScope;`,
                                `return ${RuntimeGlobals.initializeSharing}(name, initScope);`
                        ])};`,
                        "",
                        "// This exports getters to disallow modifications",
                        `${RuntimeGlobals.definePropertyGetters}(exports, {`,
                        Template.indent([
                                `get: ${runtimeTemplate.returningFunction("get")},`,
                                `init: ${runtimeTemplate.returningFunction("init")}`
                        ]),
                        "});"
                ]);

                sources.set(
                        "javascript",
                        this.useSourceMap || this.useSimpleSourceMap
                                ? new OriginalSource(source, "webpack/container-entry")
                                : new RawSource(source)
                );

                return {
                        sources,
                        runtimeRequirements
                };
        }

        /**
         * @param {string=} type the source type for which the size should be estimated
         * @returns {number} the estimated size of the module (must be non-zero)
         */
        size(type) {
                return 42;
        }

        serialize(context) {
                const { write } = context;
                write(this._name);
                write(this._exposes);
                write(this._shareScope);
                super.serialize(context);
        }

        static deserialize(context) {
                const { read } = context;
                const obj = new ContainerEntryModule(read(), read(), read());
                obj.deserialize(context);
                return obj;
        }
}

makeSerializable(
        ContainerEntryModule,
        "webpack/lib/container/ContainerEntryModule"
);

module.exports = ContainerEntryModule;