import type { EmailAccessor } from '../../accessor/email.ts';
import { type FetchedMessage } from './client.ts';
export declare function msgFilename(subject: string, uid: string): string;
/**
 * Picks the YYYY-MM-DD directory a message files under.
 *
 * The `Date:` header wins, because it is the timestamp the sender wrote
 * and the one himalaya's date conditions search on (SENTON / SENTSINCE /
 * SENTBEFORE). It is also optional, and a message without it used to
 * fall straight to the epoch, collapsing the mount's only organizing
 * axis into a single 1970 directory. IMAP's own INTERNALDATE (RFC 3501,
 * server-assigned and always present) fills that hole.
 */
export declare function dateBucket(message: FetchedMessage): string;
export declare const readdir: import("@struktoai/mirage-core/core/hierarchy/probe").ReaddirFn<EmailAccessor>;
//# sourceMappingURL=readdir.d.ts.map