configcat-js/lib/Cache.js

ConfigCat is a configuration as a service that lets you manage your features and configurations without actually deploying new code.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.fromUtf8Base64 = exports.toUtf8Base64 = exports.getLocalStorage = exports.LocalStorageCache = void 0;
var configcat_common_1 = require("configcat-common");
var LocalStorageCache = /** @class */ (function () {
    function LocalStorageCache(storage) {
        this.storage = storage;
    }
    LocalStorageCache.setup = function (kernel, localStorageGetter) {
        var localStorage = (localStorageGetter !== null && localStorageGetter !== void 0 ? localStorageGetter : getLocalStorage)();
        if (localStorage) {
            kernel.defaultCacheFactory = function (options) { return new configcat_common_1.ExternalConfigCache(new LocalStorageCache(localStorage), options.logger); };
        }
        return kernel;
    };
    LocalStorageCache.prototype.set = function (key, value) {
        this.storage.setItem(key, toUtf8Base64(value));
    };
    LocalStorageCache.prototype.get = function (key) {
        var configString = this.storage.getItem(key);
        if (configString) {
            return fromUtf8Base64(configString);
        }
    };
    return LocalStorageCache;
}());
exports.LocalStorageCache = LocalStorageCache;
function getLocalStorage() {
    var testKey = "__configcat_localStorage_test";
    try {
        var storage = window.localStorage;
        storage.setItem(testKey, testKey);
        var retrievedItem = void 0;
        try {
            retrievedItem = storage.getItem(testKey);
        }
        finally {
            storage.removeItem(testKey);
        }
        if (retrievedItem === testKey) {
            return storage;
        }
    }
    catch (err) { /* intentional no-op */ }
    return null;
}
exports.getLocalStorage = getLocalStorage;
function toUtf8Base64(str) {
    str = encodeURIComponent(str);
    str = str.replace(/%([0-9A-F]{2})/g, function (_, p1) { return String.fromCharCode(parseInt(p1, 16)); });
    return btoa(str);
}
exports.toUtf8Base64 = toUtf8Base64;
function fromUtf8Base64(str) {
    str = atob(str);
    str = str.replace(/[%\x80-\xFF]/g, function (m) { return "%" + m.charCodeAt(0).toString(16); });
    return decodeURIComponent(str);
}
exports.fromUtf8Base64 = fromUtf8Base64;