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