import { GalleryCacheService } from './cache.gallery.service';
import { Media } from './Media';
import { MediaIcon } from './MediaIcon';
import { PersonDTO } from '../../../../common/entities/PersonDTO';
export declare enum ThumbnailLoadingPriority {
    extraHigh = 4,
    high = 3,
    medium = 2,
    low = 1
}
export declare class ThumbnailLoaderService {
    private galleryCacheService;
    que: Array<ThumbnailTask>;
    runningRequests: number;
    constructor(galleryCacheService: GalleryCacheService);
    run: () => void;
    removeTask(taskEntry: ThumbnailTaskEntity): void;
    loadIcon(media: MediaIcon, priority: ThumbnailLoadingPriority, listener: ThumbnailLoadingListener): ThumbnailTaskEntity;
    loadImage(media: Media, priority: ThumbnailLoadingPriority, listener: ThumbnailLoadingListener): ThumbnailTaskEntity;
    loadPersonThumbnail(person: PersonDTO, priority: ThumbnailLoadingPriority, listener: ThumbnailLoadingListener): ThumbnailTaskEntity;
    private load;
    private getNextTask;
    private taskReady;
}
export interface ThumbnailLoadingListener {
    onStartedLoading: () => void;
    onLoad: () => void;
    onError: (error: Event | string) => void;
}
export interface ThumbnailTaskEntity {
    priority: ThumbnailLoadingPriority;
    listener: ThumbnailLoadingListener;
    parentTask: ThumbnailTask;
}
interface ThumbnailTask {
    inProgress: boolean;
    taskEntities: Array<ThumbnailTaskEntity>;
    path: string;
    onLoaded: () => void;
}
export {};