import type { ImapFlow, MailboxLockObject } from 'imapflow';
import type { EmailAccessor } from '../../accessor/email.ts';
import { type ParsedRfc822 } from './_parse.ts';
export interface FetchedMessage extends ParsedRfc822 {
    uid: string;
    flags: string[];
    /** IMAP's own arrival stamp, ISO-8601, empty when the server omits it. */
    internalDate: string;
}
export interface FolderEntry {
    name: string;
    /** The RFC 6154 special-use attribute the server tagged it with. */
    specialUse: string | null;
}
export declare function listFolderEntries(accessor: EmailAccessor): Promise<FolderEntry[]>;
export declare function listFolders(accessor: EmailAccessor): Promise<string[]>;
/**
 * Selects and locks a mailbox, failing loudly when it does not exist.
 *
 * imapflow reports every refused command as a bare "Command failed" and
 * keeps the server's own words on `responseText`, so a missing mailbox
 * arrives naming neither itself nor the problem. A `responseText` means
 * the server answered and refused, which is the same condition python
 * checks through the SELECT response code.
 */
export declare function lockMailbox(imap: ImapFlow, folder: string): Promise<MailboxLockObject>;
export declare function listMessageUids(accessor: EmailAccessor, folder: string, searchCriteria?: string, maxResults?: number | null): Promise<string[]>;
/**
 * imapflow's search object. AND is expressed by several keys on one
 * object; `or` and `not` nest further objects.
 */
export interface SearchQuery {
    all?: boolean;
    seen?: boolean;
    answered?: boolean;
    flagged?: boolean;
    draft?: boolean;
    deleted?: boolean;
    body?: string;
    text?: string;
    subject?: string;
    from?: string;
    to?: string;
    on?: Date;
    since?: Date;
    before?: Date;
    sentOn?: Date;
    sentSince?: Date;
    sentBefore?: Date;
    not?: SearchQuery;
    or?: SearchQuery[];
}
export declare function parseSearchCriteria(criteria: string): SearchQuery;
export declare function fetchRawMessage(accessor: EmailAccessor, folder: string, uid: string): Promise<Uint8Array>;
export declare function fetchMessage(accessor: EmailAccessor, folder: string, uid: string): Promise<FetchedMessage>;
export declare function fetchHeaders(accessor: EmailAccessor, folder: string, uids: readonly string[]): Promise<FetchedMessage[]>;
export declare function fetchAttachment(accessor: EmailAccessor, folder: string, uid: string, filename: string): Promise<Uint8Array | null>;
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