/* MIT License http://www.opensource.org/licenses/mit-license.php */ "use strict"; /** @typedef {import("./SerializerMiddleware").Context} Context */ /** * @template T, K * @typedef {import("./SerializerMiddleware")<T, K>} SerializerMiddleware */ class Serializer { /** * @param {SerializerMiddleware<any, any>[]} middlewares serializer middlewares * @param {Context} [context] context */ constructor(middlewares, context) { this.serializeMiddlewares = middlewares.slice(); this.deserializeMiddlewares = middlewares.slice().reverse(); this.context = context; } /** * @param {TODO | Promise<TODO>} obj object * @param {Context} context context object * @returns {Promise<TODO>} 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 = /** @type {Promise<TODO>} */ (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 {TODO | Promise<TODO>} value value * @param {Context} context object * @returns {Promise<TODO>} result */ deserialize(value, context) { const ctx = { ...context, ...this.context }; let current = value; for (const middleware of this.deserializeMiddlewares) { current = current && typeof current.then === "function" ? /** @type {Promise<TODO>} */ (current).then(data => middleware.deserialize(data, ctx) ) : middleware.deserialize(current, ctx); } return current; } } module.exports = Serializer;