335 lines
12 KiB
C#
335 lines
12 KiB
C#
using FreeSql;
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using LiveForum.Code.Base;
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using LiveForum.IService.Messages;
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using LiveForum.IService.Others;
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using LiveForum.IService.Users;
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using LiveForum.Model;
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using LiveForum.Model.Dto.Users;
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using LiveForum.Model.Events;
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using Microsoft.Extensions.Logging;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text.Json;
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using System.Threading.Tasks;
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namespace LiveForum.Service.Messages
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{
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/// <summary>
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/// 消息事件处理器实现
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/// 将事件转换为数据库消息记录（重量级，包含用户信息查询和快照构造）
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/// </summary>
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public class MessageEventHandler : IMessageEventHandler
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{
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private readonly IBaseRepository<T_Messages> _messagesRepository;
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private readonly IBaseRepository<T_Users> _usersRepository;
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private readonly IBaseRepository<T_Posts> _postsRepository;
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private readonly IBaseRepository<T_Comments> _commentsRepository;
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private readonly IUserInfoService _userInfoService;
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private readonly ILogger<MessageEventHandler> _logger;
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public MessageEventHandler(
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IBaseRepository<T_Messages> messagesRepository,
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IBaseRepository<T_Users> usersRepository,
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IBaseRepository<T_Posts> postsRepository,
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IBaseRepository<T_Comments> commentsRepository,
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IUserInfoService userInfoService,
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ILogger<MessageEventHandler> logger)
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{
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_messagesRepository = messagesRepository;
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_usersRepository = usersRepository;
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_postsRepository = postsRepository;
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_commentsRepository = commentsRepository;
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_userInfoService = userInfoService;
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_logger = logger;
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}
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/// <summary>
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/// 处理点赞事件
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/// </summary>
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public async Task HandleLikeEventAsync(LikeEvent evt)
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{
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try
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{
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// 幂等性检查
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if (await IsEventProcessedAsync(evt.EventId))
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{
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_logger.LogWarning("[EventHandler] 事件已处理过，跳过: {EventId}", evt.EventId);
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return;
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}
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// 查询触发者用户信息
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var sender = await _usersRepository.Select
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.Where(x => x.Id == evt.TriggerId)
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.FirstAsync();
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if (sender == null)
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{
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_logger.LogWarning("[EventHandler] 用户不存在，跳过点赞消息创建: TriggerId={TriggerId}", evt.TriggerId);
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return;
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}
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// 使用服务转换为 UserInfoDto（自动获取认证类型数据）
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var senderInfo = await _userInfoService.ToUserInfoDtoAsync(sender);
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// 组装消息标题和内容
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string messageTitle;
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string messageContent;
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if (evt.ContentType == 1)
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{
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messageTitle = $"点赞了我的帖子";
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messageContent = $"帖子标题：{evt.Content?.PostTitle ?? ""}";
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}
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else if (evt.ContentType == 2)
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{
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messageTitle = $"点赞了我的评论";
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messageContent = $"评论内容：{TruncateText(evt.Content?.CommentContent, 50)}";
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}
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else if (evt.ContentType == 3) // 送花
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{
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messageTitle = $"给我送花";
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messageContent = evt.Content?.PostTitle ?? ""; // "送了 X 朵花"
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}
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else
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{
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messageTitle = $"点赞了我";
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messageContent = "";
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}
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// 序列化用户信息
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var senderInfoJson = JsonSerializer.Serialize(senderInfo, new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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});
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var contentSnapshotJson = JsonSerializer.Serialize(evt.Content, new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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});
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// 创建消息记录
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var message = new T_Messages
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{
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ReceiverId = evt.ReceiverId,
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SenderId = evt.TriggerId,
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MessageType = 2, // 点赞消息
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MessageTitle = messageTitle,
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MessageContent = messageContent,
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ContentType = evt.ContentType,
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ContentId = evt.ContentId,
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IsRead = false,
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SenderInfo = senderInfoJson,
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EventId = evt.EventId,
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ContentSnapshot = contentSnapshotJson,
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CreatedAt = evt.OccurredAt
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};
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await _messagesRepository.InsertAsync(message);
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_logger.LogInformation(
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"[EventHandler] 点赞消息已创建: EventId={EventId}, ContentType={ContentType}, ContentId={ContentId}",
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evt.EventId, evt.ContentType, evt.ContentId);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex,
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"[EventHandler] 处理点赞事件失败: EventId={EventId}",
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evt.EventId);
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throw;
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}
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}
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/// <summary>
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/// 处理评论回复事件
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/// </summary>
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public async Task HandleCommentReplyEventAsync(CommentReplyEvent evt)
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{
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try
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{
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// 幂等性检查
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if (await IsEventProcessedAsync(evt.EventId))
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{
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_logger.LogWarning("[EventHandler] 事件已处理过，跳过: {EventId}", evt.EventId);
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return;
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}
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// 查询触发者用户信息
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var sender = await _usersRepository.Select
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.Where(x => x.Id == evt.TriggerId)
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.FirstAsync();
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if (sender == null)
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{
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_logger.LogWarning("[EventHandler] 用户不存在，跳过回复消息创建: TriggerId={TriggerId}", evt.TriggerId);
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return;
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}
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// 使用服务转换为 UserInfoDto（自动获取认证类型数据）
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var senderInfo = await _userInfoService.ToUserInfoDtoAsync(sender);
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// 组装消息标题
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string messageTitle;
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if (evt.IsDirectComment)
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{
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messageTitle = $"评论了你的帖子";
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}
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else
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{
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messageTitle = $"回复了我的评论";
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}
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string messageContent = $"回复内容：{TruncateText(evt.CommentContent, 50)}";
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// 序列化用户信息
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var senderInfoJson = JsonSerializer.Serialize(senderInfo, new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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});
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// 组装内容快照
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var contentSnapshot = new ContentSnapshot
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{
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PostId = evt.PostId,
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PostTitle = evt.PostTitle,
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CommentId = evt.CommentId,
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CommentContent = evt.CommentContent
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};
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var contentSnapshotJson = JsonSerializer.Serialize(contentSnapshot, new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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});
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// 创建消息记录
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var message = new T_Messages
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{
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ReceiverId = evt.ReceiverId,
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SenderId = evt.TriggerId,
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MessageType = 1, // 回复消息
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MessageTitle = messageTitle,
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MessageContent = messageContent,
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MyCommentContent = evt.MyCommentContent, // 保存我的评论内容
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ContentType = 2, // 评论类型
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ContentId = evt.CommentId,
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IsRead = false,
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SenderInfo = senderInfoJson,
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EventId = evt.EventId,
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ContentSnapshot = contentSnapshotJson,
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CreatedAt = evt.OccurredAt
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};
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await _messagesRepository.InsertAsync(message);
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_logger.LogInformation(
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"[EventHandler] 评论回复消息已创建: EventId={EventId}, CommentId={CommentId}, IsDirectComment={IsDirectComment}",
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evt.EventId, evt.CommentId, evt.IsDirectComment);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex,
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"[EventHandler] 处理评论回复事件失败: EventId={EventId}",
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evt.EventId);
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throw;
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}
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}
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/// <summary>
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/// 处理自定义消息事件
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/// </summary>
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public async Task HandleCustomMessageEventAsync(CustomMessageEvent evt)
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{
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try
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{
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// 幂等性检查
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if (await IsEventProcessedAsync(evt.EventId))
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{
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_logger.LogWarning("[EventHandler] 事件已处理过，跳过: {EventId}", evt.EventId);
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return;
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}
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// 查询触发者用户信息
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var sender = await _usersRepository.Select
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.Where(x => x.Id == evt.TriggerId)
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.FirstAsync();
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if (sender == null)
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{
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_logger.LogWarning("[EventHandler] 用户不存在，跳过自定义消息创建: TriggerId={TriggerId}", evt.TriggerId);
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return;
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}
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// 使用服务转换为 UserInfoDto（自动获取认证类型数据）
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var senderInfo = await _userInfoService.ToUserInfoDtoAsync(sender);
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// 序列化用户信息
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var senderInfoJson = JsonSerializer.Serialize(senderInfo, new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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});
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// 创建消息记录
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var message = new T_Messages
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{
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ReceiverId = evt.ReceiverId,
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SenderId = evt.TriggerId,
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MessageType = evt.MessageType, // 1-回复，2-点赞
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MessageTitle = evt.Title,
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MessageContent = evt.Content,
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MyCommentContent = evt.MyCommentContent,
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ContentType = 0, // 自定义消息没有具体内容类型
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ContentId = null,
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IsRead = false,
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SenderInfo = senderInfoJson,
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EventId = evt.EventId,
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ContentSnapshot = null,
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CreatedAt = evt.OccurredAt
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};
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await _messagesRepository.InsertAsync(message);
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_logger.LogInformation(
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"[EventHandler] 自定义消息已创建: EventId={EventId}, MessageType={MessageType}",
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evt.EventId, evt.MessageType);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex,
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"[EventHandler] 处理自定义消息事件失败: EventId={EventId}",
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evt.EventId);
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throw;
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}
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}
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/// <summary>
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/// 检查事件是否已经处理过（幂等性检查）
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/// </summary>
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private async Task<bool> IsEventProcessedAsync(string eventId)
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{
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if (string.IsNullOrEmpty(eventId))
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{
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return false;
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}
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var exists = await _messagesRepository.Select
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.Where(x => x.EventId == eventId)
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.AnyAsync();
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return exists;
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}
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/// <summary>
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/// 截断文本
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/// </summary>
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private string TruncateText(string text, int maxLength)
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{
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if (string.IsNullOrEmpty(text) || text.Length <= maxLength)
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{
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return text ?? "";
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}
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return text.Substring(0, maxLength) + "...";
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}
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}
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}
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