97 lines
2.1 KiB
JavaScript
97 lines
2.1 KiB
JavaScript
/*
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* Copyright (c) 2010-2018 Tim Düsterhus.
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*
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* Use of this software is governed by the Business Source License
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* included in the LICENSE file.
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*
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* Change Date: 2024-11-01
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*
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* On the date above, in accordance with the Business Source
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* License, use of this software will be governed by version 2
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* or later of the General Public License.
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*/
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define([], function () {
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'use strict'
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class LocalStorageEmulator {
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constructor() {
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this._data = new Map()
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return new Proxy(this, {
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get(target, property) {
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// Check if the property exists on the object or its prototype
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if (
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target.hasOwnProperty(property) ||
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Object.getPrototypeOf(target)[property]
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) {
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return target[property]
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}
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// Otherwise proxy to the underlying map
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return target.getItem(property)
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},
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set(target, property, value) {
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// Check if the property exists on the object or its prototype
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if (
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target.hasOwnProperty(property) ||
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Object.getPrototypeOf(target)[property]
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) {
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target[property] = value
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} else {
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// Proxy to the underlying map
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target.setItem(property, value)
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}
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},
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has(target, property) {
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return (
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target.hasOwnProperty(property) || // check the properties of the object
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Object.getPrototypeOf(target)[property] || // check its prototype
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target._data.has(property)
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) // check the underlying map
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},
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ownKeys(target) {
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// Proxy to the underlying map
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return Array.from(target._data.keys())
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},
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getOwnPropertyDescriptor(target, property) {
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// Make the properties of the map visible
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return {
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enumerable: true,
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configurable: true,
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}
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},
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})
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}
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get length() {
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return this._data.size
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}
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key(n = 0) {
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return Array.from(this._data.keys())[n]
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}
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getItem(key) {
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return this._data.get(key)
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}
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setItem(key, value) {
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this._data.set(key, value)
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}
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removeItem(key) {
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this._data.delete(key)
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}
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clear() {
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this._data.clear()
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}
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*[Symbol.iterator]() {
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yield* this._data.values()
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}
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}
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return LocalStorageEmulator
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})
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