/// <reference types="node" />
import { EventEmitter } from "stream";
import { PopCommand } from "../shared/PopCommand";
import { PopSocket } from "../shared/PopSocket";
import { PopServer } from "./PopServer";
import { PopServerSession } from "./PopServerSession";
import { PopServerStream } from "./PopServerStream";
export declare class PopServerConnection extends EventEmitter {
    readonly server: PopServer;
    readonly popSocket: PopSocket;
    readonly session: PopServerSession;
    udata: any;
    protected stream: PopServerStream;
    /**
     * Constructs a new PopServerConnection.
     * @param popSocket the socket.
     */
    constructor(server: PopServer, popSocket: PopSocket, session: PopServerSession);
    /**
     * Begins the server connection (listens and sends initial line).
     * @returns ourselves.
     */
    begin(): Promise<void>;
    /**
     * Gets called when the socket closed.
     * @param had_error if there was an error (net-only).
     */
    protected _handleClose(had_error: boolean): void;
    /**
     * Handles a single pop command.
     * @param data the command date.
     */
    protected _handleCommand(data: string): Promise<void>;
    /**
     * Handles the QUIT command.
     */
    protected _handleQuitCommand(): Promise<void>;
    /**
     * Handles the NOOP command.
     */
    protected _handleNoopCommand(): void;
    /**
     * Handles the capability command.
     */
    protected _handleCapabilityCommand(): void;
    /**
     * Handles the TOP command.
     * @param command the command.
     */
    protected _handleTopCommand(command: PopCommand): Promise<void>;
    /**
     * Handles the APOP command.
     * @param command the command.
     */
    protected _handleApopCommand(command: PopCommand): Promise<void>;
    /**
     * Handles the RSET command.
     */
    protected _handleResetCommand(): void;
    /**
     * Handles the LIST command.
     * @param command the command.
     */
    protected _handleListCommand(command: PopCommand): void;
    /**
     * Handles the DELE command.
     * @param command the command.
     */
    protected _handleDeleteCommand(command: PopCommand): void;
    /**
     * Handles the RETR command.
     * @param command the command.
     */
    protected _handleRetreiveCommand(command: PopCommand): Promise<void>;
    /**
     * Handles the STAT command.
     */
    protected _handleStatisticsCommand(): void;
    /**
     * Handles the UIDL command.
     */
    protected _handleUidListCommand(command: PopCommand): void;
    /**
     * Handles the lang command.
     * @param command the command.
     */
    protected _handleLanguageCommand(command: PopCommand): void;
    /**
     * Handles the user command.
     * @param command the command.
     */
    protected _handleUserCommand(command: PopCommand): Promise<void>;
    /**
     * Handles the pass command.
     * @param command the command.
     */
    protected _handle_pass(command: PopCommand): Promise<void>;
    /**
     * Gets called when a command is not implemented.
     *
     * @param command the command.
     */
    protected _handleNotImplemented(command: PopCommand): void;
}