webpack/lib/DependencyTemplates.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

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

"use strict";

const createHash = require("./util/createHash");

/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./DependencyTemplate")} DependencyTemplate */
/** @typedef {typeof import("./util/Hash")} Hash */

/** @typedef {new (...args: any[]) => Dependency} DependencyConstructor */

class DependencyTemplates {
	/**
	 * @param {string | Hash} hashFunction the hash function to use
	 */
	constructor(hashFunction = "md4") {
		/** @type {Map<Function, DependencyTemplate>} */
		this._map = new Map();
		/** @type {string} */
		this._hash = "31d6cfe0d16ae931b73c59d7e0c089c0";
		this._hashFunction = hashFunction;
	}

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

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

	/**
	 * @param {string} part additional hash contributor
	 * @returns {void}
	 */
	updateHash(part) {
		const hash = createHash(this._hashFunction);
		hash.update(`${this._hash}${part}`);
		this._hash = /** @type {string} */ (hash.digest("hex"));
	}

	getHash() {
		return this._hash;
	}

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

module.exports = DependencyTemplates;