mirror of https://github.com/webpack/webpack.git
87 lines
1.7 KiB
JavaScript
87 lines
1.7 KiB
JavaScript
/*
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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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const writeObject = (obj, write, values) => {
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const keys = Object.keys(obj);
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for (const key of keys) {
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const value = obj[key];
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if (
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value !== null &&
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typeof value === "object" &&
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value.constructor &&
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value.constructor === Object
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) {
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// nested object
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write(true);
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write(key);
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writeObject(value, write, values);
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write(false);
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} else {
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write(key);
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values.push(value);
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}
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}
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};
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class PlainObjectSerializer {
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serialize(obj, { write }) {
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if (Array.isArray(obj)) {
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write(obj.length);
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for (const item of obj) {
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write(item);
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}
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} else {
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const values = [];
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writeObject(obj, write, values);
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write(null);
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for (const value of values) {
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write(value);
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}
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}
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}
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deserialize({ read }) {
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let key = read();
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if (typeof key === "number") {
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const array = [];
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for (let i = 0; i < key; i++) {
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array.push(read());
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}
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return array;
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} else {
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const keys = [];
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let hasNested = key === true;
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while (key !== null) {
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keys.push(key);
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key = read();
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if (key === true) {
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hasNested = true;
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}
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}
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let currentObj = {};
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const stack = hasNested && [];
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for (let i = 0; i < keys.length; i++) {
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const key = keys[i];
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if (key === true) {
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// enter nested object
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const objectKey = keys[++i];
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const newObj = {};
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currentObj[objectKey] = newObj;
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stack.push(currentObj);
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currentObj = newObj;
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} else if (key === false) {
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// leave nested object
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currentObj = stack.pop();
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} else {
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currentObj[key] = read();
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}
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}
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return currentObj;
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}
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}
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}
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module.exports = PlainObjectSerializer;
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