import { BaseService } from '../../services/abstract/baseService';
import { StorageItem } from './models/storageItem';
export declare enum LocalStorageKeys {
    apiKey = "Storyteller.apiKey",
    ampEnvironment = "Storyteller.ampEnvironment",
    ampVersion = "Storyteller.ampVersion",
    clipLikes = "Storyteller.clipLikes",
    clipShares = "Storyteller.clipShares",
    clipsViewed = "Storyteller.clipsViewed",
    customEnvironment = "Storyteller.customEnvironment",
    customInstanceHost = "Storyteller.customInstanceHost",
    environment = "Storyteller.environment",
    forceShowShareButton = "Storyteller.forceShowShareButton",
    hasShownInstructions = "Storyteller.hasShownInstructions",
    pollAnswerMap = "Storyteller.pollAnswerMap",
    polls = "Storyteller.polls",
    quizAnswerMap = "Storyteller.quizAnswerMap",
    quizAnsweredCorrectlyMap = "Storyteller.quizAnsweredCorrectlyMap",
    quizzes = "Storyteller.quizzes",
    recentStoryPlaybackMode = "Storyteller.recentStoryPlaybackMode",
    settings = "Storyteller.settings",
    storiesReadMap = "Storyteller.storiesReadMap",
    user = "Storyteller.user",
    userAttributes = "Storyteller.userAttributesStorage",
    userId = "Storyteller.userId",
    webSdkEnvironment = "Storyteller.webSdkEnvironment",
    webSdkVersion = "Storyteller.webSdkVersion"
}
declare class LocalStorageService extends BaseService {
    static sharedInstance: LocalStorageService;
    protected logTag: string;
    private localStorageSupported;
    private storage_;
    constructor();
    hasItem(key: LocalStorageKeys): boolean;
    add(key: LocalStorageKeys, item: unknown): void;
    getAllItems(): StorageItem<any>[];
    getAllValues(): any[];
    get<T>(key: LocalStorageKeys): T | null;
    remove(key: LocalStorageKeys): void;
    clear(): void;
    private canKeyBeStored_;
    private isFallbackValueDefined_;
    private isLocalStorageValueDefined_;
    private onEventTrackingOptionsUpdated_;
    /**
     * In some cases, the values stored in local storage might get removed after Storyteller
     * is initialised, for example after a user interacts with a cookie banner. We keep track
     * of the important values in local memory and restore them if they are missing.
     * More details https://stormideas.atlassian.net/browse/ST-11121
     */
    private restoreIfUnavailable_;
    /**
     * See comment on restoreIfUnavailable_ function.
     */
    private shouldValueHaveFallback_;
}
declare const _default: LocalStorageService;
export default _default;