79 lines
2.6 KiB
C#
79 lines
2.6 KiB
C#
using Mapster;
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using Microsoft.Extensions.Caching.Distributed;
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using Microsoft.Extensions.Configuration;
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using Volo.Abp.Application.Services;
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using Volo.Abp.Caching;
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using Yi.Framework.AiHub.Application.Contracts.Dtos.Announcement;
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using Yi.Framework.AiHub.Application.Contracts.IServices;
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using Yi.Framework.AiHub.Domain.Entities;
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using Yi.Framework.SqlSugarCore.Abstractions;
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namespace Yi.Framework.AiHub.Application.Services;
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/// <summary>
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/// 公告服务
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/// </summary>
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public class AnnouncementService : ApplicationService, IAnnouncementService
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{
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private readonly ISqlSugarRepository<AnnouncementAggregateRoot> _announcementRepository;
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private readonly IConfiguration _configuration;
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private readonly IDistributedCache<AnnouncementCacheDto> _announcementCache;
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private const string AnnouncementCacheKey = "AiHub:Announcement";
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public AnnouncementService(
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ISqlSugarRepository<AnnouncementAggregateRoot> announcementRepository,
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IConfiguration configuration,
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IDistributedCache<AnnouncementCacheDto> announcementCache)
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{
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_announcementRepository = announcementRepository;
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_configuration = configuration;
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_announcementCache = announcementCache;
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}
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/// <summary>
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/// 获取公告信息
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/// </summary>
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public async Task<List<AnnouncementLogDto>> GetAsync()
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{
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// 使用 GetOrAddAsync 从缓存获取或添加数据，缓存1小时
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var cacheData = await _announcementCache.GetOrAddAsync(
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AnnouncementCacheKey,
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async () => await LoadAnnouncementDataAsync(),
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() => new DistributedCacheEntryOptions
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{
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AbsoluteExpirationRelativeToNow = TimeSpan.FromHours(1)
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}
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);
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return cacheData?.Logs ?? new List<AnnouncementLogDto>();
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}
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/// <summary>
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/// 从数据库加载公告数据
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/// </summary>
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private async Task<AnnouncementCacheDto> LoadAnnouncementDataAsync()
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{
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// 1️⃣ 一次性查出全部公告（不排序）
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var logs = await _announcementRepository._DbQueryable
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.ToListAsync();
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var now = DateTime.Now;
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// 2️⃣ 内存中处理排序
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var orderedLogs = logs
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.OrderByDescending(x =>
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x.StartTime <= now &&
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(x.EndTime == null || x.EndTime >= now)
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)
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.ThenByDescending(x => x.StartTime)
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.ToList();
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// 转换为 DTO
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var logDtos = orderedLogs.Adapt<List<AnnouncementLogDto>>();
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return new AnnouncementCacheDto
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{
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Logs = logDtos
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};
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}
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}
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