122 lines
4.7 KiB
JavaScript
122 lines
4.7 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.LocalStorageStore = void 0;
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var key_value_filesystem_1 = require("../generic/key_value_filesystem");
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var api_error_1 = require("../core/api_error");
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var global_1 = require("../core/global");
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/**
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* Some versions of FF and all versions of IE do not support the full range of
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* 16-bit numbers encoded as characters, as they enforce UTF-16 restrictions.
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* @url http://stackoverflow.com/questions/11170716/are-there-any-characters-that-are-not-allowed-in-localstorage/11173673#11173673
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* @hidden
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*/
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var supportsBinaryString = false, binaryEncoding;
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try {
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global_1.default.localStorage.setItem("__test__", String.fromCharCode(0xD800));
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supportsBinaryString = global_1.default.localStorage.getItem("__test__") === String.fromCharCode(0xD800);
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}
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catch (e) {
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// IE throws an exception.
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supportsBinaryString = false;
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}
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binaryEncoding = supportsBinaryString ? 'binary_string' : 'binary_string_ie';
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if (!Buffer.isEncoding(binaryEncoding)) {
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// Fallback for non BrowserFS implementations of buffer that lack a
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// binary_string format.
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binaryEncoding = "base64";
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}
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/**
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* A synchronous key-value store backed by localStorage.
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*/
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var LocalStorageStore = /** @class */ (function () {
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function LocalStorageStore() {
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}
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LocalStorageStore.prototype.name = function () {
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return LocalStorageFileSystem.Name;
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};
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LocalStorageStore.prototype.clear = function () {
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global_1.default.localStorage.clear();
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};
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LocalStorageStore.prototype.beginTransaction = function (type) {
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// No need to differentiate.
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return new key_value_filesystem_1.SimpleSyncRWTransaction(this);
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};
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LocalStorageStore.prototype.get = function (key) {
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try {
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var data = global_1.default.localStorage.getItem(key);
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if (data !== null) {
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return Buffer.from(data, binaryEncoding);
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}
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}
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catch (e) {
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// Do nothing.
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}
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// Key doesn't exist, or a failure occurred.
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return undefined;
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};
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LocalStorageStore.prototype.put = function (key, data, overwrite) {
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try {
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if (!overwrite && global_1.default.localStorage.getItem(key) !== null) {
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// Don't want to overwrite the key!
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return false;
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}
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global_1.default.localStorage.setItem(key, data.toString(binaryEncoding));
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return true;
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}
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catch (e) {
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throw new api_error_1.ApiError(api_error_1.ErrorCode.ENOSPC, "LocalStorage is full.");
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}
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};
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LocalStorageStore.prototype.del = function (key) {
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try {
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global_1.default.localStorage.removeItem(key);
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}
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catch (e) {
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throw new api_error_1.ApiError(api_error_1.ErrorCode.EIO, "Unable to delete key " + key + ": " + e);
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}
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};
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return LocalStorageStore;
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}());
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exports.LocalStorageStore = LocalStorageStore;
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/**
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* A synchronous file system backed by localStorage. Connects our
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* LocalStorageStore to our SyncKeyValueFileSystem.
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*/
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var LocalStorageFileSystem = /** @class */ (function (_super) {
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__extends(LocalStorageFileSystem, _super);
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/**
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* Creates a new LocalStorage file system using the contents of `localStorage`.
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*/
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function LocalStorageFileSystem() {
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return _super.call(this, { store: new LocalStorageStore() }) || this;
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}
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/**
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* Creates a LocalStorageFileSystem instance.
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*/
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LocalStorageFileSystem.Create = function (options, cb) {
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cb(null, new LocalStorageFileSystem());
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};
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LocalStorageFileSystem.isAvailable = function () {
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return typeof global_1.default.localStorage !== 'undefined';
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};
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LocalStorageFileSystem.Name = "LocalStorage";
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LocalStorageFileSystem.Options = {};
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return LocalStorageFileSystem;
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}(key_value_filesystem_1.SyncKeyValueFileSystem));
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exports.default = LocalStorageFileSystem;
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//# sourceMappingURL=LocalStorage.js.map
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