55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
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'use strict';
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const Reach = require('./reach');
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const internals = {};
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exports.keys = function (obj, options = {}) {
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return options.symbols !== false ? Reflect.ownKeys(obj) : Object.getOwnPropertyNames(obj); // Defaults to true
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};
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exports.store = function (source, keys) {
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const storage = new Map();
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for (let i = 0; i < keys.length; ++i) {
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const key = keys[i];
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const value = Reach(source, key);
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if (typeof value === 'object' ||
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typeof value === 'function') {
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storage.set(key, value);
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internals.reachSet(source, key, undefined);
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}
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}
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return storage;
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};
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exports.restore = function (copy, source, storage) {
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for (const [key, value] of storage) {
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internals.reachSet(copy, key, value);
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internals.reachSet(source, key, value);
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}
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};
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internals.reachSet = function (obj, key, value) {
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const path = Array.isArray(key) ? key : key.split('.');
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let ref = obj;
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for (let i = 0; i < path.length; ++i) {
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const segment = path[i];
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if (i + 1 === path.length) {
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ref[segment] = value;
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}
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ref = ref[segment];
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}
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};
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