97 lines
4.0 KiB
C++
97 lines
4.0 KiB
C++
#ifndef ENGINE_H
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#define ENGINE_H
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#include <map>
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#include <string>
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#ifdef ENABLE_ADVANCED_FEATURE
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#include "dataguard/dataguard.h"
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#include "dataguard/snapshot.h"
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#endif
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#include <vector>
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#include "data.h"
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#include "stop_register.hpp"
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#include "storage/disk_map.hpp"
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#include "transaction_mainenance.hpp"
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#include "utils.h"
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class TicketSystemEngine {
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#ifdef ENABLE_ADVANCED_FEATURE
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SnapShotManager snapshot_manager;
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#endif
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bool its_time_to_exit = false;
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std::string data_directory;
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std::map<hash_t, uint8_t> online_users;
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/**
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* @brief user data system
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* @details The database for users.
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*/
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DiskMap<hash_t, FullUserData> user_data;
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/**
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* @brief train data system
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*/
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DiskMap<hash_t, StationNameData> station_name_data_storage;
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DiskMap<hash_t, TicketPriceData> ticket_price_data_storage;
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DiskMap<hash_t, CoreTrainData> core_train_data_storage;
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typedef std::pair<hash_t, uint8_t> seats_index_t;
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DiskMap<seats_index_t, SeatsData> seats_data_storage;
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/**
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* @brief transaction data system
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* @details This part is responsible for storing:
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* - Stop information: using the station + HashedTrainID as the index, with a B+ tree point to the train's sales start
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* and end dates, minutes required from the starting station to the current station, and the current station's stop
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* time
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* - Order information: using an incrementing, non-repeating uint64_t as the index, with an OrderData attached
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* - Waiting queue: using the station + HashedTrainID as the index, with a B+ tree point to a LinkedQueue, storing IDs
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* pointing to order information
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* - User purchase history: using HashedUserID as the index, with a LinkedStack attached, with a simple skip list-like
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* optimization, storing IDs pointing to order information
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*/
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StopRegister stop_register;
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TransactionManager transaction_manager;
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void PrepareExit();
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public:
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const bool *its_time_to_exit_ptr = &its_time_to_exit;
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inline TicketSystemEngine(std::string data_directory)
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: data_directory(data_directory),
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user_data("user_data.idx", data_directory + "/user_data.idx", "user_data.val",
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data_directory + "/user_data.val"),
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station_name_data_storage("station_name.idx", data_directory + "/station_name.idx", "station_name.val",
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data_directory + "/station_name.val"),
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ticket_price_data_storage("ticket_price.idx", data_directory + "/ticket_price.idx", "ticket_price.val",
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data_directory + "/ticket_price.val"),
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core_train_data_storage("core_train.idx", data_directory + "/core_train.idx", "core_train.val",
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data_directory + "/core_train.val"),
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seats_data_storage("seats.idx", data_directory + "/seats.idx", "seats.val", data_directory + "/seats.val"),
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stop_register("stop_register.idx", data_directory + "/stop_register.idx"),
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transaction_manager("txn.data", data_directory + "/txn.data", "queue.idx", data_directory + "/queue.idx",
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"order.idx", data_directory + "/order.idx") {}
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std::string Execute(const std::string &command);
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// User system
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std::string AddUser(const std::string &command);
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std::string LoginUser(const std::string &command);
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std::string LogoutUser(const std::string &command);
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std::string QueryProfile(const std::string &command);
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std::string ModifyProfile(const std::string &command);
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// Train System
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std::string AddTrain(const std::string &command);
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std::string DeleteTrain(const std::string &command);
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std::string ReleaseTrain(const std::string &command);
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std::string QueryTrain(const std::string &command);
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// Transaction System
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std::string BuyTicket(const std::string &command);
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std::string QueryOrder(const std::string &command);
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std::string RefundTicket(const std::string &command);
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std::string QueryTransfer(const std::string &command);
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std::string QueryTicket(const std::string &command);
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// Other functions
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std::string Clean();
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std::string Exit(const std::string &command);
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};
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#endif |