import * as express from 'express';
import { ModuleInfo } from '../module';
import { BaseStartupTask } from './';
export declare const SESSION_COOKIE_NAME = "tendril.session.id";
export declare const POOL_KEY_SESSION = "$tendril-session-store-connection";
export declare const WARN_NO_SECRET = "[SessionStage]: Warning! No app.session.options.secret configured! A random string will be generated and used however this means user sessionswill not be valid if the application restarts!";
/**
 * SessionSupportTask enables http session middleware for modules that declare it.
 *
 * Enabling session support on a parent module will make it available for
 * all the children module as well so no need to repeat.
 *
 * This will configure session support for EACH module that declares
 * "app.session.enable = true". A app.session.options.secret SHOULD be provided
 * for signing cookies (to detect tampering). If it is not supplied the
 * following takes place:
 *
 * 1. The value is read from process.env.SESSION_SECRET or
 * 2. the value is read from process.env.COOKIE_SECRET or
 * 3. the value is read from process.env.SECRET otherwise
 * 4. a random string is generated (sessions will not survive app restarts).
 *
 * Note: If a session store is specified, this task will attempt to open its
 * connection and add it to the global pool.
 */
export declare class SessionSupportTask extends BaseStartupTask {
    name: string;
    execute(mod: ModuleInfo): Promise<void>;
}
/**
 * handleSessionTTL is responsible for:
 * 1. Removing session values that have reached TTL 0.
 * 2. Decrementing session values that have their TTL set.
 * @private
 */
export declare const handleSessionTTL: (req: express.Request, _: express.Response, next: express.NextFunction) => void;