order_event.hpp

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#pragma once
 
#include <string>
#include <variant>
#include "app/model/order.hpp"
 
namespace fix40 {
 
enum class OrderEventType {
    NEW_ORDER,       
    CANCEL_REQUEST,  
    SESSION_LOGON,   
    SESSION_LOGOUT   
};
 
struct OrderEvent {
    OrderEventType type;       
    SessionID sessionID;       
    std::string userId;        
 
    std::variant<std::monostate, Order, CancelRequest> data;
 
    // =========================================================================
    // 构造函数
    // =========================================================================
 
    OrderEvent()
        : type(OrderEventType::SESSION_LOGON)
        , data(std::monostate{})
    {}
 
    OrderEvent(OrderEventType t, const SessionID& sid, const std::string& uid = "")
        : type(t)
        , sessionID(sid)
        , userId(uid)
        , data(std::monostate{})
    {}
 
    static OrderEvent newOrder(const Order& order, const std::string& uid) {
        OrderEvent event;
        event.type = OrderEventType::NEW_ORDER;
        event.sessionID = order.sessionID;
        event.userId = uid;
        event.data = order;
        return event;
    }
 
    static OrderEvent cancelRequest(const CancelRequest& req, const std::string& uid) {
        OrderEvent event;
        event.type = OrderEventType::CANCEL_REQUEST;
        event.sessionID = req.sessionID;
        event.userId = uid;
        event.data = req;
        return event;
    }
 
    // =========================================================================
    // 访问器
    // =========================================================================
 
    const Order* getOrder() const {
        return std::get_if<Order>(&data);
    }
 
    const CancelRequest* getCancelRequest() const {
        return std::get_if<CancelRequest>(&data);
    }
};
 
} // namespace fix40