import { Page } from '../Class/Page';
import { Asset } from '../Class/Asset';
import { Url } from '../Class/Url';
export declare class BaseCrawler {
    private _settings;
    private _pages;
    private _assets;
    private _pagesCrawled;
    private _assetsCrawled;
    private _pagesToFollow;
    private _running;
    private _activeThreads;
    private hooks;
    constructor(settings: CrawlerSettings);
    toString(): string;
    getCrawledPages(): Page[];
    getCrawledAssets(): Asset[];
    getPages(): Page[];
    getAssets(): Asset[];
    run(hooks: CrawlerHooks): void;
    /**
     * Crawls the starting page's robots.txt and sitemap.xml files.
     * Calls the appropriate hooks when they are loaded.
     */
    private crawlingMeta;
    private crawlingPageRunner;
    private crawlingAssetRunner;
    private startPageThread;
    private startAssetThread;
    private canPageCrawl;
    private canAssetCrawl;
    canRun(): boolean;
    /**
     * Kill the crawler (stop all activity)
     */
    kill(): void;
    /**
     * Enqueue a page to be crawled
     * @param url Url to enqueue
     */
    enquequePage(url: Url): void;
    /**
     * Enqueue an asset to be crawled
     * @param url Url to enqueue
     */
    enquequeAsset(url: Url): void;
}