import { Logger, ResourceCache } from '@foxpage/foxpage-types';
export type DiskCacheOption = {
    appId: string;
    type: string;
    logger?: Logger;
};
/**
 * disk cache
 *
 * @export
 * @class DiskCache
 * @implements {ResourceCache<T>}
 * @template T
 */
export declare class DiskCache<T> implements ResourceCache<T> {
    diskCache: Map<string, {
        filePath: string;
        hash: string;
    }>;
    private appId;
    private type;
    private logger?;
    constructor(opt: DiskCacheOption);
    getCurCount(): number;
    /**
     * set disk cache
     *
     * @param {string} id
     * @param {T} resource
     * @return {*}  {Promise<void>}
     */
    set(id: string, resource: T): Promise<void>;
    /**
     * get content from disk
     *
     * @param {string} id
     * @return {*}  {(Promise<T | null | undefined>)}
     */
    get(id: string): Promise<T | null | undefined>;
    /**
     * check if exist the content
     *
     * @param {string} id
     * @return {*}  {Promise<boolean>}
     */
    has(id: string): Promise<boolean>;
    /**
     * update delete status for delete action
     *
     * @param {string} id
     * @param {boolean} all true: remove all files of the dir, false: only remove the invalid files
     * @return {*}  {Promise<void>}
     * @memberof DiskCache
     */
    delete(id: string, all?: boolean): Promise<void>;
    private getRootDir;
    private generateFilePath;
    private computeMD5Hash;
    private getFiles;
    /**
     * destroy the instance
     *
     */
    destroy(): void;
}