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

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

"use strict";

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

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("./NullDependency").RawRuntimeRequirements} RawRuntimeRequirements */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/Hash")} Hash */

class RuntimeRequirementsDependency extends NullDependency {
        /**
         * Creates an instance of RuntimeRequirementsDependency.
         * @param {RawRuntimeRequirements} runtimeRequirements runtime requirements
         */
        constructor(runtimeRequirements) {
                super();
                this.runtimeRequirements = new Set(runtimeRequirements);
                /** @type {undefined | string} */
                this._hashUpdate = undefined;
        }

        /**
         * 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 = `${[...this.runtimeRequirements].join()}`;
                }
                hash.update(this._hashUpdate);
        }

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

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

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

RuntimeRequirementsDependency.Template = class RuntimeRequirementsDependencyTemplate 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, { runtimeRequirements }) {
                const dep = /** @type {RuntimeRequirementsDependency} */ (dependency);
                for (const req of dep.runtimeRequirements) {
                        runtimeRequirements.add(req);
                }
        }
};

module.exports = RuntimeRequirementsDependency;