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

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

"use strict";

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

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../AsyncDependenciesBlock")} AsyncDependenciesBlock */
/** @typedef {import("../Dependency").ReferencedExports} ReferencedExports */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Entrypoint")} Entrypoint */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */

/**
 * Represents the worker dependency runtime component.
 * @typedef {object} WorkerDependencyOptions
 * @property {string=} publicPath public path for the worker
 * @property {boolean=} needNewUrl true when need generate `new URL(...)`, otherwise false
 */

class WorkerDependency extends ModuleDependency {
        /**
         * Creates an instance of WorkerDependency.
         * @param {string} request request
         * @param {Range} range range
         * @param {WorkerDependencyOptions} workerDependencyOptions options
         */
        constructor(request, range, workerDependencyOptions) {
                super(request);
                this.range = range;
                // If options are updated, don't forget to update the hash and serialization functions
                /** @type {WorkerDependencyOptions} */
                this.options = workerDependencyOptions;
                /** Cache the hash */
                /** @type {undefined | string} */
                this._hashUpdate = undefined;
        }

        /**
         * 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) {
                return Dependency.NO_EXPORTS_REFERENCED;
        }

        get type() {
                return "new Worker()";
        }

        get category() {
                return "worker";
        }

        /**
         * Updates the hash with the data contributed by this instance.
         * @param {Hash} hash hash to be updated
         * @param {UpdateHashContext} context context
         * @returns {void}
         */
        updateHash(hash, context) {
                if (this._hashUpdate === undefined) {
                        this._hashUpdate = JSON.stringify(this.options);
                }
                hash.update(this._hashUpdate);
        }

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

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

WorkerDependency.Template = class WorkerDependencyTemplate extends (
        ModuleDependency.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) {
                const { chunkGraph, moduleGraph, runtimeRequirements } = templateContext;
                const dep = /** @type {WorkerDependency} */ (dependency);
                const block = /** @type {AsyncDependenciesBlock} */ (
                        moduleGraph.getParentBlock(dependency)
                );
                const entrypoint = /** @type {Entrypoint} */ (
                        chunkGraph.getBlockChunkGroup(block)
                );
                const chunk = entrypoint.getEntrypointChunk();
                // We use the workerPublicPath option if provided, else we fallback to the RuntimeGlobal publicPath
                const workerImportBaseUrl = dep.options.publicPath
                        ? `"${dep.options.publicPath}"`
                        : RuntimeGlobals.publicPath;

                runtimeRequirements.add(RuntimeGlobals.publicPath);
                runtimeRequirements.add(RuntimeGlobals.baseURI);
                runtimeRequirements.add(RuntimeGlobals.getChunkScriptFilename);

                const workerImportStr = `/* worker import */ ${workerImportBaseUrl} + ${
                        RuntimeGlobals.getChunkScriptFilename
                }(${JSON.stringify(chunk.id)}), ${RuntimeGlobals.baseURI}`;

                source.replace(
                        dep.range[0],
                        dep.range[1] - 1,
                        dep.options.needNewUrl ? `new URL(${workerImportStr})` : workerImportStr
                );
        }
};

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

module.exports = WorkerDependency;