From 45dc14d77b5dacf5be42f04578c288653c9e7d45 Mon Sep 17 00:00:00 2001
From: nanxun <nanxun@nxsir.cn>
Date: Tue, 4 Nov 2025 16:17:23 +0800
Subject: [PATCH] =?UTF-8?q?add(IConversationService)=EF=BC=9A=E6=B7=BB?=
 =?UTF-8?q?=E5=8A=A0=E4=BC=9A=E8=AF=9D=E6=9C=8D=E5=8A=A1=E6=8E=A5=E5=8F=A3?=
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---
 backend/IM_API/Dtos/ClearConversationsDto.cs  | 26 +++++++++++++++++++
 .../Services/IConversationService.cs          | 21 +++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 backend/IM_API/Dtos/ClearConversationsDto.cs
 create mode 100644 backend/IM_API/Interface/Services/IConversationService.cs

diff --git a/backend/IM_API/Dtos/ClearConversationsDto.cs b/backend/IM_API/Dtos/ClearConversationsDto.cs
new file mode 100644
index 0000000..0d8c5c9
--- /dev/null
+++ b/backend/IM_API/Dtos/ClearConversationsDto.cs
@@ -0,0 +1,26 @@
+namespace IM_API.Dtos
+{
+    public class ClearConversationsDto
+    {
+        public int UserId { get; set; }
+        /// <summary>
+        /// 聊天类型
+        /// </summary>
+        public ChatType ChatType { get; set; }
+        /// <summary>
+        /// 目标ID，聊天类型为群则为群id，私聊为用户id
+        /// </summary>
+        public int TargetId { get; set; }
+    }
+    public enum ChatType
+    {
+        /// <summary>
+        /// 私聊
+        /// </summary>
+        single = 0,
+        /// <summary>
+        /// 私聊
+        /// </summary>
+        group = 1
+    }
+}
diff --git a/backend/IM_API/Interface/Services/IConversationService.cs b/backend/IM_API/Interface/Services/IConversationService.cs
new file mode 100644
index 0000000..9c4bf63
--- /dev/null
+++ b/backend/IM_API/Interface/Services/IConversationService.cs
@@ -0,0 +1,21 @@
+using IM_API.Dtos;
+using IM_API.Models;
+
+namespace IM_API.Interface.Services
+{
+    public interface IConversationService
+    {
+        /// <summary>
+        /// 清除消息会话
+        /// </summary>
+        /// <param name="clearConversationsDto"></param>
+        /// <returns></returns>
+        Task<bool> ClearConversationsAsync(ClearConversationsDto clearConversationsDto);
+        /// <summary>
+        /// 获取用户当前消息会话
+        /// </summary>
+        /// <param name="userId">用户id</param>
+        /// <returns></returns>
+        Task<Conversation> GetConversationsAsync(int userId);
+    }
+}