/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { Observable } from 'rxjs';
import { Path, PathFragment } from '../path';
export type FileBuffer = ArrayBuffer;
export type FileBufferLike = ArrayBufferLike;
export interface HostWatchOptions {
    readonly persistent?: boolean;
    readonly recursive?: boolean;
}
export declare enum HostWatchEventType {
    Changed = 0,
    Created = 1,
    Deleted = 2,
    Renamed = 3
}
export type Stats<T extends object = {}> = T & {
    isFile(): boolean;
    isDirectory(): boolean;
    readonly size: number;
    readonly atime: Date;
    readonly mtime: Date;
    readonly ctime: Date;
    readonly birthtime: Date;
};
export interface HostWatchEvent {
    readonly time: Date;
    readonly type: HostWatchEventType;
    readonly path: Path;
}
export interface HostCapabilities {
    synchronous: boolean;
}
export interface ReadonlyHost<StatsT extends object = {}> {
    readonly capabilities: HostCapabilities;
    read(path: Path): Observable<FileBuffer>;
    list(path: Path): Observable<PathFragment[]>;
    exists(path: Path): Observable<boolean>;
    isDirectory(path: Path): Observable<boolean>;
    isFile(path: Path): Observable<boolean>;
    stat(path: Path): Observable<Stats<StatsT> | null> | null;
}
export interface Host<StatsT extends object = {}> extends ReadonlyHost<StatsT> {
    write(path: Path, content: FileBufferLike): Observable<void>;
    delete(path: Path): Observable<void>;
    rename(from: Path, to: Path): Observable<void>;
    watch(path: Path, options?: HostWatchOptions): Observable<HostWatchEvent> | null;
}