import { AppState, JupyterHostRecord, ServerConfig, HostRef } from "@nteract/types";
/**
 * Creates a server configuration from details about a given Jupyter host.
 *
 * @param   host    The Jupyter host we are connected to
 *
 * @returns         An object contain the endpoint, token
 */
export declare const serverConfig: (host: JupyterHostRecord) => ServerConfig;
/**
 * Returns the host the nteract application is connected to.
 */
export declare const currentHost: (state: AppState) => import("@nteract/types").HostRecord;
/**
 * Returns the type of host the nteract application is currently connected
 * to. This is set to "jupyter" by default.
 */
export declare const currentHostType: import("reselect").OutputSelector<AppState, "jupyter" | "local" | "empty" | null, (res: import("@nteract/types").HostRecord) => "jupyter" | "local" | "empty" | null>;
/**
 * Returns true if the host we are currently connected to is a Jupyter
 * kernel.
 */
export declare const isCurrentHostJupyter: import("reselect").OutputSelector<AppState, boolean, (res: "jupyter" | "local" | "empty" | null) => boolean>;
/**
 * Returns whether or not we are currently connected to the kernel through
 * a websocket connection.
 */
export declare const isCurrentKernelJupyterWebsocket: import("reselect").OutputSelector<AppState, boolean, (res1: "jupyter" | "local" | "empty" | null, res2: "unknown" | "websocket" | "zeromq" | null) => boolean>;
/**
 * Returns whether or not we are currently connected to the kernel through
 * a ZeroMQ connection.
 */
export declare const isCurrentKernelZeroMQ: import("reselect").OutputSelector<AppState, boolean, (res1: "jupyter" | "local" | "empty" | null, res2: "unknown" | "websocket" | "zeromq" | null) => boolean>;
/**
 * Returns the hosts currently registered on the application by their refs.
 *
 * @param state   The crrent application state
 */
export declare const hostsByRef: (state: AppState) => import("immutable").Map<string, import("@nteract/types").HostRecord>;
/**
 * Returns the HostRef associated with a HostRecord.
 *
 * ```
 * const host = makeJupyterHostRecord({ endpoint: "https://example.com "});
 * const ref = selectors.hostRefByHostRecord(state, { host });
 * ```
 *
 * @param state     The current application state
 * @param { host }  An object containing the hostRecord to retrieve an HostRef for
 */
export declare const hostRefByHostRecord: (state: AppState, { host }: {
    host: JupyterHostRecord;
}) => string | undefined;
/**
 * Returns the HostRecord associated with a hostRef.
 *
 * ```
 * const hostRef = "someHostRef";
 * const hostRecord = selectors.hostRecordByHostRef(state, { hostRef });
 * ```
 * @param state         The current application sate
 * @param { hostRef }   An object containing the hostRef to retrieve a record for
 */
export declare const hostRecordByHostRef: (state: AppState, { hostRef }: {
    hostRef: HostRef;
}) => import("immutable").RecordOf<import("@nteract/types").JupyterHostRecordProps> | import("immutable").RecordOf<import("@nteract/types").LocalHostRecordProps> | import("immutable").RecordOf<import("@nteract/types").EmptyHost> | undefined;