import { EventEmitter } from 'events';
import { QueueItem } from './queue';
import FilesystemBackend, { FSBackend } from './cache-backend-fs';

export default class Cache extends EventEmitter {
  datastore: FSBackend;
  constructor(cacheLoadParameter: string[], cacheBackend: () => void);

  setCacheData(queueObject: QueueItem, data: any, callback?: () => void): void;
  getCacheData(queueObject: QueueItem, callback?: (error?: Error, data?: any) => void): void;
  saveCache(): void;
}

export { FilesystemBackend, Cache };