import GirafeSingleton from '../../base/GirafeSingleton';
/**
 * Manages user data storage and retrieval across different storage sources.
 * The class supports localStorage and server as storage options (server-side implementation currently not available).
 * It provides functionality to set, get, save, and delete user data while maintaining the flexibility to target specific paths
 * within the user data object.
 */
declare class UserDataManager extends GirafeSingleton {
    private readonly storageKey;
    private source?;
    private readonly WARNING_UNKNOWN_SOURCE;
    private readonly WARNING_NOT_IMPLEMENTED;
    setSource(source: string): void;
    /**
     * Retrieves a specific part of the user data defined by the storage path.
     * @param storagePath path in the user data object to the requested value.
     * @param forceLocalStorage if true, reads user data from the local storage, ignoring the source.
     * @returns the partial user data object.
     */
    getUserData(storagePath: string, forceLocalStorage?: boolean): unknown;
    /**
     * Saves user data to a specific path in the storage.
     * @param storagePath path in the user data object where the value is saved to.
     * @param newValue user data value to save.
     * @param forceLocalStorage if true, saves user data to the local storage, ignoring the source.
     */
    saveUserData(storagePath: string, newValue: unknown, forceLocalStorage?: boolean): void;
    /**
     * Delete a specific part of the user data defined by the storage path.
     * @param storagePath path in the user data object that will be deleted.
     * @param forceLocalStorage if true, deletes user data in the local storage, ignoring the source.
     */
    deleteUserData(storagePath: string, forceLocalStorage?: boolean): void;
    /**
     * Deletes all user data in storage.
     * @param forceLocalStorage Force deletion from local storage regardless of the currently set data source.
     */
    deleteAllUserData(forceLocalStorage?: boolean): void;
    /**
     * Helper: Load data from the user data storage.
     * @param forceLocalStorage forces loading data from local storage, independent of the specified source.
     * @returns the full user data object in the storage.
     */
    private load;
    /**
     * Helper: Save user data to storage.
     * @param fullUserDataObject full user data object that is saved.
     * @param forceLocalStorage forces saving data to local storage, independent of the specified source.
     * @private
     */
    private save;
    /**
     * Helper: Determines if a particular operation should use the local browser storage.
     */
    private isInLocalStorage;
}
export default UserDataManager;