import { SpiderHandle } from '../handle';
export declare type SpiderNavigatorUrlCallback = (h: SpiderHandle) => string | null;
export declare type SpiderNavigatorIsDoneCallback = (h: SpiderHandle) => boolean;
export interface SpiderNavigatorOpts {
    baseTarget: string;
    target: SpiderNavigatorUrlCallback | string;
    isDone?: SpiderNavigatorIsDoneCallback;
}
export interface SpiderNavigatorFetchResponse {
    rawData: string;
    rawResponse: any;
}
export declare abstract class SpiderNavigator {
    protected opts: SpiderNavigatorOpts;
    constructor(opts: SpiderNavigatorOpts);
    protected abstract fetch(target: string, h: SpiderHandle): Promise<SpiderNavigatorFetchResponse>;
    getBaseTarget(): string;
    protected getNext(previousHandle: SpiderHandle): string | null;
    isDone(h: SpiderHandle): boolean;
    attemptFetch(previousHandle: SpiderHandle, iteration: number): Promise<SpiderHandle | null>;
    pause(lengthInMs: number): Promise<void>;
}
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