source: frontend/node_modules/webpack/lib/DependencyTemplates.js

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

"use strict";

const { DEFAULTS } = require("./config/defaults");
const createHash = require("./util/createHash");

/** @typedef {import("./Compilation").DependencyConstructor} DependencyConstructor */
/** @typedef {import("./DependencyTemplate")} DependencyTemplate */
/** @typedef {import("./util/Hash").HashFunction} HashFunction */

class DependencyTemplates {
        /**
         * Creates an instance of DependencyTemplates.
         * @param {HashFunction} hashFunction the hash function to use
         */
        constructor(hashFunction = DEFAULTS.HASH_FUNCTION) {
                /** @type {Map<DependencyConstructor, DependencyTemplate>} */
                this._map = new Map();
                /** @type {string} */
                this._hash = "31d6cfe0d16ae931b73c59d7e0c089c0";
                /** @type {HashFunction} */
                this._hashFunction = hashFunction;
        }

        /**
         * Returns template for this dependency.
         * @param {DependencyConstructor} dependency Constructor of Dependency
         * @returns {DependencyTemplate | undefined} template for this dependency
         */
        get(dependency) {
                return this._map.get(dependency);
        }

        /**
         * Updates value using the provided dependency.
         * @param {DependencyConstructor} dependency Constructor of Dependency
         * @param {DependencyTemplate} dependencyTemplate template for this dependency
         * @returns {void}
         */
        set(dependency, dependencyTemplate) {
                this._map.set(dependency, dependencyTemplate);
        }

        /**
         * Updates the hash with the data contributed by this instance.
         * @param {string} part additional hash contributor
         * @returns {void}
         */
        updateHash(part) {
                const hash = createHash(this._hashFunction);
                hash.update(`${this._hash}${part}`);
                this._hash = hash.digest("hex");
        }

        getHash() {
                return this._hash;
        }

        clone() {
                const newInstance = new DependencyTemplates(this._hashFunction);
                newInstance._map = new Map(this._map);
                newInstance._hash = this._hash;
                return newInstance;
        }
}

module.exports = DependencyTemplates;