AIKKEY_WPFWin7/AIK.Service/IService/IImageCacheService.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Media.Imaging;

namespace AIK.Service.IService
{
    public interface IImageCacheService
    {
        /// <summary>
        /// 异步获取图片。优先从缓存中获取，若不存在或已过期则从网络下载。
        /// </summary>
        /// <param name="imageUrl">第三方图片地址</param>
        /// <param name="cacheKey">自定义缓存键（可选）</param>
        /// <returns>缓存的图片</returns>
        Task<BitmapImage> GetImageAsync(string imageUrl, string cacheKey = null, CancellationToken cancellationToken = default);

        /// <summary>
        /// 异步获取图片。优先从缓存中获取，若不存在或已过期则从网络下载。
        /// </summary>
        /// <param name="imageUrl">第三方图片地址</param>
        /// <param name="cacheKey">自定义缓存键（可选）</param>
        /// <returns>缓存的图片</returns>
        Task<BitmapImage> GetImageByLocalPathAsync(string imageUrl, string cacheKey = null, CancellationToken cancellationToken = default);
        /// <summary>
        /// 返回本地存储的文件路径
        /// </summary>
        /// <param name="imageUrl"></param>
        /// <param name="cacheKey"></param>
        /// <param name="cancellationToken"></param>
        /// <returns>缓存的图片文件本地路径</returns>
        Task<string> GetImagePathAsync(string imageUrl, string cacheKey = null, CancellationToken cancellationToken = default);
        /// <summary>
        /// 清除所有过期的缓存文件。
        /// </summary>
        Task ClearExpiredCacheAsync();

        /// <summary>
        /// 强制清除所有缓存（内存和磁盘）。
        /// </summary>
        Task ClearAllCacheAsync();
    }
}