feat: 修改 WebSocket 消息结构，支持新的命令格式

backend/gateway/internal/ws/client.go

@@ -58,26 +58,56 @@ func (c *Client) readPump() {
 			break
 		}
 
-		var msg Message
-		if err := json.Unmarshal(message, &msg); err != nil {
+		// 解析为通用的消息结构
+		var msgMap map[string]interface{}
+		if err := json.Unmarshal(message, &msgMap); err != nil {
 			log.Printf("error unmarshaling message: %v", err)
 			continue
 		}
 
 		// 处理消息
-		switch msg.Type {
+		c.handleMessage(msgMap)
+	}
+}
+
+func (c *Client) handleMessage(msgMap map[string]interface{}) {
+	// 检查是否是 ping 消息（保持向后兼容）
+	if msgType, ok := msgMap["type"].(string); ok {
+		switch msgType {
 		case MessageTypePing:
 			// 回复 pong
 			pongMsg := &Message{Type: MessageTypePong}
 			c.send <- pongMsg
+			return
 		case MessageTypeText:
 			// 广播文本消息
-			c.hub.broadcast <- &msg
+			msg := &Message{
+				Type:    MessageTypeText,
+				Content: msgMap["content"].(string),
+				Data:    msgMap["data"],
+			}
+			c.hub.broadcast <- msg
+			return
 		case MessageTypeCommand:
-			// 处理命令
-			c.handleCommand(&msg)
+			// 处理命令（保持向后兼容）
+			msg := &Message{
+				Type:    MessageTypeCommand,
+				Data:    msgMap["data"],
+			}
+			c.handleCommand(msg)
+			return
 		}
 	}
+
+	// 处理新的消息结构
+	if cmd, ok := msgMap["cmd"].(string); ok {
+		// 提取数据
+		data := msgMap["data"]
+		seq := msgMap["seq"].(string)
+
+		// 处理命令
+		c.handleNewCommand(seq, cmd, data)
+	}
 }
 
 func (c *Client) writePump() {
@@ -199,3 +229,104 @@ func (c *Client) handleCommand(msg *Message) {
 
 	c.send <- response
 }
+
+func (c *Client) handleNewCommand(seq string, cmd string, data interface{}) {
+	// 处理新的命令结构
+	log.Printf("Received new command: %s, seq: %s, data: %v", cmd, seq, data)
+
+	// 根据 cmd 字段处理不同的命令
+	switch cmd {
+	case "user.register":
+		// 提取注册信息
+		if registerData, ok := data.(map[string]interface{}); ok {
+			account, accountOk := registerData["account"].(string)
+			password, passwordOk := registerData["password"].(string)
+
+			if !accountOk || !passwordOk {
+				// 回复错误信息
+				errorResponse := map[string]interface{}{
+					"seq":       seq,
+					"cmd":       cmd,
+					"type":      "error",
+					"content":   "Invalid register command: missing account or password",
+					"timestamp": time.Now().UnixMilli(),
+				}
+				c.sendJSON(errorResponse)
+				return
+			}
+
+			// 调用用户服务注册
+			if c.hub.userService != nil {
+				// 异步调用用户服务注册
+				go func() {
+					resp, err := c.hub.userService.Register(nil, account, password)
+					if err != nil {
+						// 回复错误信息
+						errorResponse := map[string]interface{}{
+							"seq":       seq,
+							"cmd":       cmd,
+							"type":      "error",
+							"content":   "Register failed: " + err.Error(),
+							"timestamp": time.Now().UnixMilli(),
+						}
+						c.sendJSON(errorResponse)
+						return
+					}
+
+					// 回复成功信息
+					successResponse := map[string]interface{}{
+						"seq":       seq,
+						"cmd":       cmd,
+						"type":      "text",
+						"content":   "Register successful",
+						"data": map[string]interface{}{
+							"user_id": resp.UserId,
+							"account": resp.Account,
+							"message": resp.Response.Message,
+							"code":    resp.Response.Code,
+						},
+						"timestamp": time.Now().UnixMilli(),
+					}
+					c.sendJSON(successResponse)
+				}()
+			} else {
+				// 回复错误信息
+				errorResponse := map[string]interface{}{
+					"seq":       seq,
+					"cmd":       cmd,
+					"type":      "error",
+					"content":   "User service not available",
+					"timestamp": time.Now().UnixMilli(),
+				}
+				c.sendJSON(errorResponse)
+			}
+		}
+		return
+	default:
+		// 其他命令处理
+		response := map[string]interface{}{
+			"seq":       seq,
+			"cmd":       cmd,
+			"type":      "text",
+			"content":   "Command executed successfully",
+			"data":      data,
+			"timestamp": time.Now().UnixMilli(),
+		}
+		c.sendJSON(response)
+	}
+}
+
+func (c *Client) sendJSON(data interface{}) {
+	// 将数据转换为 JSON 并发送
+	msgBytes, err := json.Marshal(data)
+	if err != nil {
+		log.Printf("error marshaling message: %v", err)
+		return
+	}
+
+	// 写入 WebSocket 连接
+	c.conn.SetWriteDeadline(time.Now().Add(writeWait))
+	if err := c.conn.WriteMessage(websocket.TextMessage, msgBytes); err != nil {
+		log.Printf("error writing message: %v", err)
+	}
+}