完成进入会话消息自动已读

src/main/resources/com/bao/dating/mapper/ChatRecordsMapper.xml

@@ -32,18 +32,36 @@
     </insert>
 
     <!-- 根据两个用户ID查询聊天记录 (按发送时间倒序) - PageHelper 会自动处理分页 -->
-    <select id="selectChatWindowHistory" resultType="com.bao.dating.pojo.entity.ChatRecords">
+    <select id="selectChatHistoryByCursor" resultType="com.bao.dating.pojo.entity.ChatRecords">
         SELECT
         chat_id, sender_user_id, receiver_user_id, message_content, message_type,
         read_status, read_time, send_time, message_status, created_at, updated_at
         FROM chat_records
         WHERE
             message_status = 1
-          AND (
+        AND (
             (sender_user_id = #{currentUserId} AND receiver_user_id = #{targetUserId})
             OR
             (sender_user_id = #{targetUserId} AND receiver_user_id = #{currentUserId})
-            )
+        )
+        <if test="cursor != null">
+            AND send_time &lt; #{cursor}
+        </if>
         ORDER BY send_time DESC
+        LIMIT #{size}
     </select>
+
+    <!-- 标记消息为已读 -->
+    <update id="markMessagesAsRead">
+        UPDATE chat_records
+        SET
+            read_status = 1,
+            read_time = #{readTime},
+            updated_at = NOW()
+        WHERE
+            sender_user_id = #{senderUserId}
+          AND receiver_user_id = #{receiverUserId}
+          AND read_status = 0
+          AND message_status = 1
+    </update>
 </mapper>

src/main/resources/com/bao/dating/mapper/ChatSessionsMapper.xml

@@ -59,4 +59,15 @@
           AND target_user_id = #{targetUserId}
     </update>
 
+    <!-- 清空未读消息数 -->
+    <update id="clearUnreadCount">
+        UPDATE chat_sessions
+        SET
+            unread_count = 0,
+            updated_at = NOW()
+        WHERE
+            user_id = #{userId}
+          AND target_user_id = #{targetUserId}
+          AND session_status = 1
+    </update>
 </mapper>