source: frontend/node_modules/webpack/lib/container/FallbackDependency.js

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

"use strict";

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

/** @typedef {import("./RemoteModule").ExternalRequests} ExternalRequests */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

class FallbackDependency extends Dependency {
        /**
         * Creates an instance of FallbackDependency.
         * @param {ExternalRequests} requests requests
         */
        constructor(requests) {
                super();
                /** @type {ExternalRequests} */
                this.requests = requests;
        }

        /**
         * Returns an identifier to merge equal requests.
         * @returns {string | null} an identifier to merge equal requests
         */
        getResourceIdentifier() {
                return `fallback ${this.requests.join(" ")}`;
        }

        get type() {
                return "fallback";
        }

        get category() {
                return "esm";
        }

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

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         * @returns {FallbackDependency} deserialize fallback dependency
         */
        static deserialize(context) {
                const { read } = context;
                const obj = new FallbackDependency(read());
                obj.deserialize(context);
                return obj;
        }
}

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

module.exports = FallbackDependency;