webpack/lib/serialization/Serializer.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports 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
*/

"use strict";

/**
 * @template T, K
 * @typedef {import("./SerializerMiddleware")<T, K>} SerializerMiddleware
 */

class Serializer {
	/**
	 * @param {SerializerMiddleware<any, any>[]} middlewares serializer middlewares
	 * @param {TODO=} context context
	 */
	constructor(middlewares, context) {
		this.serializeMiddlewares = middlewares.slice();
		this.deserializeMiddlewares = middlewares.slice().reverse();
		this.context = context;
	}

	/**
	 * @param {any} obj object
	 * @param {TODO} context content
	 * @returns {Promise<any>} result
	 */
	serialize(obj, context) {
		const ctx = { ...context, ...this.context };
		let current = obj;
		for (const middleware of this.serializeMiddlewares) {
			if (current && typeof current.then === "function") {
				current = current.then(data => data && middleware.serialize(data, ctx));
			} else if (current) {
				try {
					current = middleware.serialize(current, ctx);
				} catch (err) {
					current = Promise.reject(err);
				}
			} else break;
		}
		return current;
	}

	/**
	 * @param {any} value value
	 * @param {TODO} context context
	 * @returns {Promise<any>} result
	 */
	deserialize(value, context) {
		const ctx = { ...context, ...this.context };
		/** @type {any} */
		let current = value;
		for (const middleware of this.deserializeMiddlewares) {
			if (current && typeof current.then === "function") {
				current = current.then(data => middleware.deserialize(data, ctx));
			} else {
				current = middleware.deserialize(current, ctx);
			}
		}
		return current;
	}
}

module.exports = Serializer;