完成会话列表查询

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

@@ -3,61 +3,41 @@
         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.bao.dating.mapper.ChatSessionsMapper">
 
-    <!-- 如果发送方不存在会话则创建 -->
-    <insert id="insertIfNotExistsForSender" parameterType="com.bao.dating.pojo.entity.ChatSessions">
+    <!-- 插入或更新发送方会话 -->
+    <insert id="upsertSessionForSender" parameterType="com.bao.dating.pojo.entity.ChatSessions">
         INSERT INTO chat_sessions
         (user_id, target_user_id, session_name, last_message_id, last_message_content, last_message_time,
-         unread_count, session_status, top_status, mute_status, created_at, updated_at)
-        SELECT
+        unread_count, session_status, top_status, mute_status, created_at, updated_at)
+        VALUES
+        (
             #{userId}, #{targetUserId}, #{sessionName}, #{lastMessageId}, #{lastMessageContent}, #{lastMessageTime},
             0, 1, 0, 0, NOW(), NOW()
-        FROM DUAL
-        WHERE NOT EXISTS (
-            SELECT 1 FROM chat_sessions
-            WHERE user_id = #{userId} AND target_user_id = #{targetUserId}
-        );
-    </insert>
-
-    <!-- 如果接收方不存在会话则创建 -->
-    <insert id="insertIfNotExistsForReceiver" parameterType="com.bao.dating.pojo.entity.ChatSessions">
-        INSERT INTO chat_sessions
-        (user_id, target_user_id, session_name, last_message_id, last_message_content, last_message_time,
-         unread_count, session_status, top_status, mute_status, created_at, updated_at)
-        SELECT
-            #{userId}, #{targetUserId}, #{sessionName}, #{lastMessageId}, #{lastMessageContent}, #{lastMessageTime},
-            0, 1, 0, 0, NOW(), NOW()
-        FROM DUAL
-        WHERE NOT EXISTS (
-            SELECT 1 FROM chat_sessions
-            WHERE user_id = #{userId} AND target_user_id = #{targetUserId}
         )
+        ON DUPLICATE KEY UPDATE
+        last_message_id = VALUES(last_message_id),
+        last_message_content = VALUES(last_message_content),
+        last_message_time = VALUES(last_message_time),
+        unread_count = 0,
+        updated_at = NOW();
     </insert>
 
-    <!-- 更新发送方的会话信息 -->
-    <update id="updateSessionForSender" parameterType="com.bao.dating.pojo.entity.ChatSessions">
-        UPDATE chat_sessions
-        SET
-        last_message_id = #{lastMessageId},
-        last_message_content = #{lastMessageContent},
-        last_message_time = #{lastMessageTime},
-        unread_count = 0,
-        updated_at = NOW()
-        WHERE user_id = #{userId}
-        AND target_user_id = #{targetUserId};
-    </update>
-
-    <!-- 更新接收方的会话信息 -->
-    <update id="updateSessionForReceiver" parameterType="com.bao.dating.pojo.entity.ChatSessions">
-        UPDATE chat_sessions
-        SET
-            last_message_id = #{lastMessageId},
-            last_message_content = #{lastMessageContent},
-            last_message_time = #{lastMessageTime},
-            unread_count = unread_count + 1,
-            updated_at = NOW()
-        WHERE user_id = #{userId}
-          AND target_user_id = #{targetUserId}
-    </update>
+    <!-- 插入或更新接收方会话 -->
+    <insert id="upsertSessionForReceiver" parameterType="com.bao.dating.pojo.entity.ChatSessions">
+        INSERT INTO chat_sessions
+        (user_id, target_user_id, session_name, last_message_id, last_message_content, last_message_time,
+        unread_count, session_status, top_status, mute_status, created_at, updated_at)
+        VALUES
+        (
+            #{userId}, #{targetUserId}, #{sessionName}, #{lastMessageId}, #{lastMessageContent}, #{lastMessageTime},
+            1, 1, 0, 0, NOW(), NOW()
+        )
+        ON DUPLICATE KEY UPDATE
+        last_message_id = VALUES(last_message_id),
+        last_message_content = VALUES(last_message_content),
+        last_message_time = VALUES(last_message_time),
+        unread_count = unread_count + 1,
+        updated_at = NOW();
+    </insert>
 
     <!-- 清空未读消息数 -->
     <update id="clearUnreadCount">
@@ -70,4 +50,14 @@
           AND target_user_id = #{targetUserId}
           AND session_status = 1
     </update>
+
+    <!-- 查询会话列表 -->
+    <select id="selectSessionsByUserId" resultType="com.bao.dating.pojo.entity.ChatSessions">
+        SELECT session_id, target_user_id, session_name, last_message_content,
+               last_message_time, unread_count, top_status, mute_status
+        FROM chat_sessions
+        WHERE user_id = #{userId}
+          AND session_status = 1
+        ORDER BY top_status DESC, last_message_time DESC
+    </select>
 </mapper>