49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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class Serializer {
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constructor(middlewares, context) {
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this.serializeMiddlewares = middlewares.slice();
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this.deserializeMiddlewares = middlewares.slice().reverse();
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this.context = context;
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}
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serialize(obj, context) {
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const ctx = { ...context, ...this.context };
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let current = obj;
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for (const middleware of this.serializeMiddlewares) {
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if (current instanceof Promise) {
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current = current.then(
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data => data && middleware.serialize(data, context)
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);
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} else if (current) {
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try {
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current = middleware.serialize(current, ctx);
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} catch (err) {
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current = Promise.reject(err);
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}
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} else break;
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}
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return current;
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}
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deserialize(value, context) {
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const ctx = { ...context, ...this.context };
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/** @type {any} */
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let current = value;
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for (const middleware of this.deserializeMiddlewares) {
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if (current instanceof Promise) {
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current = current.then(data => middleware.deserialize(data, context));
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} else {
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current = middleware.deserialize(current, ctx);
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}
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}
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return current;
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}
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}
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module.exports = Serializer;
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