import type { Session, SessionData, SessionStorage, unstable_MiddlewareFunction, unstable_RouterContextProvider } from "react-router";
/**
 * Creates a session middleware that uses the provided session storage object
 * to manage session data.
 *
 * The session middleware will read the session data from the request cookies,
 * and store it in the context for the rest of the middleware or loaders and
 * actions to use.
 *
 * After the middleware chain is done, the session data will be compared to the
 * initial data, and if it changed, the session will be commited to the storage
 * and a Set-Cookie header will be added to the response.
 *
 * This middleware also helps implement rolling sessions by setting the session
 * cookie on every response.
 *
 * @param sessionStorage The session storage object used by the middleware
 * @param shouldCommit A function that compares the previous and next session data
 * to determine if it changed and needs to be commited. Defaults to a function that always returns true.
 * @returns The session middleware and a function to get the session from the context
 *
 * @example
 * // app/middlewares/session.ts
 * import { sessionStorage } from "~/session";
 * import { unstable_createSessionMiddleware } from "remix-utils";
 *
 * export const [sessionMiddleware, getSession] =
 *   unstable_createSessionMiddleware(sessionStorage);
 *
 * // app/root.tsx
 * import { sessionMiddleware } from "~/middlewares/session";
 * export const unstable_middleware = [sessionMiddleware];
 *
 * // app/routes/_index.tsx
 * import { getSession } from "~/middlewares/session";
 *
 * export async function loader({ context }: Route.LoaderArgs) {
 *   let session = getSession(context);
 *   session.set("key", "value"); // This will be commited automatically
 *   return { data: session.get("data") };
 * }
 */
export declare function unstable_createSessionMiddleware<Data = SessionData, FlashData = Data>(sessionStorage: SessionStorage<Data, FlashData>, shouldCommit?: unstable_createSessionMiddleware.ShouldCommitFunction<Data>): unstable_createSessionMiddleware.ReturnType<Data, FlashData>;
export declare namespace unstable_createSessionMiddleware {
    type GetSessionFunction<Data, FlashData> = (context: unstable_RouterContextProvider) => Session<Data, FlashData>;
    type ShouldCommitFunction<Data> = (prev: Partial<Data>, next: Partial<Data>) => boolean;
    type ReturnType<Data, FlashData> = [
        unstable_MiddlewareFunction<Response>,
        GetSessionFunction<Data, FlashData>
    ];
}