import { PackageCache } from '../cache/PackageCache';
import { CurrentBuildClient } from '../current';
import { PackageDB } from '../db';
import { FindResourceInfoOptions, PackageInfo, ResourceInfo } from '../package';
import { RegistryClient } from '../registry';
import { LogFunction } from '../utils';
import { VirtualPackage } from '../virtual';
import { LoadStatus, PackageLoader } from './PackageLoader';
export declare enum SafeMode {
    OFF = "OFF",
    FREEZE = "FREEZE",
    CLONE = "CLONE"
}
export type BasePackageLoaderOptions = {
    log?: LogFunction;
    resourceCacheSize?: number;
    safeMode?: SafeMode;
};
export declare class BasePackageLoader implements PackageLoader {
    private packageDB;
    private packageCache;
    private registryClient;
    private currentBuildClient;
    private log;
    private virtualPackages;
    private resourceCache?;
    private safeMode;
    constructor(packageDB: PackageDB, packageCache: PackageCache, registryClient: RegistryClient, currentBuildClient: CurrentBuildClient, options?: BasePackageLoaderOptions);
    loadPackage(name: string, version: string): Promise<LoadStatus>;
    loadVirtualPackage(pkg: VirtualPackage): Promise<LoadStatus>;
    private loadPackageFromCache;
    private loadResourcesFromCache;
    private loadResourceFromCache;
    private loadResource;
    private isCurrentVersionMissingOrStale;
    private getResourceAtPath;
    getPackageLoadStatus(name: string, version: string): LoadStatus;
    findPackageInfos(name: string): PackageInfo[];
    findPackageInfo(name: string, version: string): PackageInfo;
    findPackageJSONs(name: string): any[];
    findPackageJSON(name: string, version: string): any;
    findResourceInfos(key: string, options?: FindResourceInfoOptions): ResourceInfo[];
    findResourceInfo(key: string, options?: FindResourceInfoOptions): ResourceInfo;
    findResourceJSONs(key: string, options?: FindResourceInfoOptions): any[];
    findResourceJSON(key: string, options?: FindResourceInfoOptions): any;
    exportDB(): Promise<{
        mimeType: string;
        data: Buffer;
    }>;
    optimize(): void;
    clear(): void;
}