import { SessionState } from './session-state.interface';
import { SessionStore } from './session-store';
/**
 * Representation of a server/database/file session.
 *
 * @export
 * @class Session
 */
export declare class Session {
    private readonly store;
    private readonly state;
    private readonly oldFlash;
    private oldId;
    private status;
    /**
     * Retuns the user ID. If the session is anonymous, the value is null.
     *
     * @readonly
     * @type {(string|number|null)}
     * @memberof Session
     */
    get userId(): string | number | null;
    /**
     * Returns true if the session has expired due to inactivity
     * or because it reached the maximum lifetime allowed.
     *
     * @readonly
     * @type {boolean}
     * @memberof Session
     */
    get isExpired(): boolean;
    /**
     * Returns the session expiration time in seconds.
     *
     * @readonly
     * @type {number}
     * @memberof Session
     */
    get expirationTime(): number;
    constructor(store: SessionStore, state: SessionState, options: {
        exists: boolean;
    });
    /**
     * Sets or replaces the userId associated with the session.
     *
     * @param {({ id: number|string })} user - The user containing the ID.
     * @memberof Session
     */
    setUser(user: {
        id: number | string | object;
    } | {
        _id: number | string | object;
    }): void;
    /**
     * Adds or replaces an element in the session. This operation is not saved
     * in the saved unless you call the "commit" function.
     *
     * @param {string} key - The property key.
     * @param {*} value - The property value.
     * @param {{ flash?: boolean }} [options={}] If flash is true, the key/value
     * will be erased at the end of the next request.
     * @memberof Session
     */
    set(key: string, value: any, options?: {
        flash?: boolean;
    }): void;
    /**
     * Gets the value of a key in the session content.
     *
     * @template T
     * @param {string} key - The property key.
     * @returns {(T | undefined)} The property value.
     * @memberof Session
     */
    get<T>(key: string): T | undefined;
    get<T>(key: string, defaultValue: any): T;
    /**
     * Gets the session ID.
     *
     * @returns {string} - The session ID.
     * @memberof Session
     */
    getToken(): string;
    /**
     * Regenerates the session with a new ID. It is recommended
     * to regenerate the session ID after any privilege level change
     * within the associated user session.
     *
     * Common scenario: an anonymous user is authenticated.
     *
     * @returns {Promise<void>}
     * @memberof Session
     */
    regenerateID(): Promise<void>;
    /**
     * Destroys the session.
     *
     * @returns {Promise<void>}
     * @memberof Session
     */
    destroy(): Promise<void>;
    /**
     * Returns true if the method `destroy` has previously been called.
     *
     * @readonly
     * @type {boolean}
     * @memberof Session
     */
    get isDestroyed(): boolean;
    /**
     * Saves or updates the session and extends its lifetime.
     *
     * If the session has already been destroyed, an error is thrown.
     *
     * This function calls periodically the store method "cleanUpExpiredSessions".
     *
     * @returns {Promise<void>}
     * @memberof Session
     */
    commit(): Promise<void>;
    /**
     * Returns the current time in seconds.
     *
     * @private
     * @returns {number} The current time.
     * @memberof Session
     */
    private getTime;
    private shouldCleanUpExpiredSessions;
    private getTimeouts;
}