setting up structure

src/include/engine.h

@@ -0,0 +1,47 @@
+#ifndef ENGINE_H
+#define ENGINE_H
+#include <map>
+#include <string>
+#ifdef ENABLE_ADVANCED_FEATURE
+#include "dataguard/dataguard.h"
+#include "dataguard/snapshot.h"
+#endif
+#include <vector>
+#include "utils.h"
+class TicketSystemEngine {
+#ifdef ENABLE_ADVANCED_FEATURE
+  SnapShotManager snapshot_manager;
+#endif
+  std::string data_directory;
+  std::map<hash_t, bool> online_users;
+  void PrepareExit();
+
+ public:
+  inline TicketSystemEngine(std::string data_directory) : data_directory(data_directory) {}
+  std::string Execute(const std::string &command);
+
+  // 用户相关函数
+  std::string AddUser(const std::string &command);
+  std::string LoginUser(const std::string &command);
+  std::string LogoutUser(const std::string &command);
+  std::string QueryProfile(const std::string &command);
+  std::string ModifyProfile(const std::string &command);
+
+  // 车次相关函数
+  std::string AddTrain(const std::string &command);
+  std::string DeleteTrain(const std::string &command);
+  std::string ReleaseTrain(const std::string &command);
+  std::string QueryTrain(const std::string &command);
+
+  // 订单相关函数
+  std::string BuyTicket(const std::string &command);
+  std::string QueryOrder(const std::string &command);
+  std::string RefundTicket(const std::string &command);
+
+  // 其他函数
+  std::string QueryTransfer(const std::string &command);
+  std::string QueryTicket(const std::string &command);
+  std::string Clean();
+  std::string Exit();
+};
+#endif