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84 lines
2.2 KiB
84 lines
2.2 KiB
'use strict';
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const {
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VOID, PRIMITIVE, ARRAY, OBJECT, DATE, REGEXP, MAP, SET, ERROR, BIGINT
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} = require('./types.js');
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const env = typeof self === 'object' ? self : globalThis;
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const deserializer = ($, _) => {
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const as = (out, index) => {
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$.set(index, out);
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return out;
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};
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const unpair = index => {
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if ($.has(index))
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return $.get(index);
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const [type, value] = _[index];
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switch (type) {
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case PRIMITIVE:
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case VOID:
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return as(value, index);
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case ARRAY: {
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const arr = as([], index);
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for (const index of value)
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arr.push(unpair(index));
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return arr;
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}
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case OBJECT: {
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const object = as({}, index);
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for (const [key, index] of value)
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object[unpair(key)] = unpair(index);
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return object;
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}
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case DATE:
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return as(new Date(value), index);
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case REGEXP: {
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const {source, flags} = value;
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return as(new RegExp(source, flags), index);
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}
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case MAP: {
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const map = as(new Map, index);
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for (const [key, index] of value)
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map.set(unpair(key), unpair(index));
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return map;
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}
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case SET: {
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const set = as(new Set, index);
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for (const index of value)
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set.add(unpair(index));
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return set;
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}
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case ERROR: {
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const {name, message} = value;
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return as(new env[name](message), index);
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}
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case BIGINT:
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return as(BigInt(value), index);
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case 'BigInt':
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return as(Object(BigInt(value)), index);
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case 'ArrayBuffer':
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return as(new Uint8Array(value).buffer, value);
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case 'DataView': {
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const { buffer } = new Uint8Array(value);
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return as(new DataView(buffer), value);
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}
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}
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return as(new env[type](value), index);
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};
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return unpair;
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};
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/**
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* @typedef {Array<string,any>} Record a type representation
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*/
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/**
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* Returns a deserialized value from a serialized array of Records.
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* @param {Record[]} serialized a previously serialized value.
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* @returns {any}
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*/
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const deserialize = serialized => deserializer(new Map, serialized)(0);
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exports.deserialize = deserialize;
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