ready to write query

src/include/engine.h

@@ -8,6 +8,7 @@
 #endif
 #include <vector>
 #include "data.h"
+#include "stop_register.hpp"
 #include "storage/disk_map.hpp"
 #include "utils.h"
 class TicketSystemEngine {
@@ -30,11 +31,12 @@ class TicketSystemEngine {
   DiskMap<hash_t, StationNameData> station_name_data_storage;
   DiskMap<hash_t, TicketPriceData> ticket_price_data_storage;
   DiskMap<hash_t, CoreTrainData> core_train_data_storage;
+  typedef std::pair<hash_t, uint8_t> seats_index_t;
+  DiskMap<seats_index_t, SeatsData> seats_data_storage;
 
   /**
    * @brief transaction data system
    * @details This part is responsible for storing:
-   * - Remaining seat numbers: using HashedTrainID + train number as the index, with a B+ tree point to an array
    * - Stop information: using the station + HashedTrainID as the index, with a B+ tree point to the train's sales start
    * and end dates, minutes required from the starting station to the current station, and the current station's stop
    * time
@@ -44,9 +46,7 @@ class TicketSystemEngine {
    * - User purchase history: using HashedUserID as the index, with a LinkedStack attached, with a simple skip list-like
    * optimization, storing IDs pointing to order information
    */
-  // TODO
+  StopRegister stop_register;
-  typedef std::pair<hash_t, uint8_t> seats_index_t;
-  DiskMap<seats_index_t, SeatsData> seats_data_storage;
 
   void PrepareExit();
 
@@ -62,7 +62,8 @@ class TicketSystemEngine {
                                   data_directory + "/ticket_price.val"),
         core_train_data_storage("core_train.idx", data_directory + "/core_train.idx", "core_train.val",
                                 data_directory + "/core_train.val"),
-        seats_data_storage("seats.idx", data_directory + "/seats.idx", "seats.val", data_directory + "/seats.val") {}
+        seats_data_storage("seats.idx", data_directory + "/seats.idx", "seats.val", data_directory + "/seats.val"),
+        stop_register("stop_register.idx", data_directory + "/stop_register.idx") {}
   std::string Execute(const std::string &command);
 
   // User system

src/include/stop_register.hpp

@@ -0,0 +1,84 @@
+#ifndef STOP_REGISTER_HPP
+#define STOP_REGISTER_HPP
+#include <vector>
+#include "basic_defs.h"
+#include "data.h"
+#include "storage/bpt.hpp"
+#include "storage/buffer_pool_manager.h"
+#include "storage/driver.h"
+typedef std::pair<hash_t, hash_t> stop_register_t;  // The first is station hash, the second is train hash
+struct MinimalTrainRecord {
+  uint16_t saleDate_beg : 7, saleDate_end : 7, vis_time_offset : 13, type : 1;
+};
+static_assert(sizeof(MinimalTrainRecord) == sizeof(default_numeric_index_t));
+
+class StopRegister : public DataDriverBase {
+  std::string bpt_file_identifier;
+  std::string bpt_file_path;
+  DiskManager *bpt_disk_manager;
+  BufferPoolManager *bpt_bpm;
+  BPlusTreeIndexer<stop_register_t, std::less<stop_register_t>> *bpt_indexer;
+
+ public:
+  // for satety, all the copy/move operations are deleted, please manage it using pointer
+  StopRegister &operator=(const StopRegister &) = delete;
+  StopRegister(const StopRegister &) = delete;
+  StopRegister &operator=(StopRegister &&) = delete;
+  StopRegister(StopRegister &&) = delete;
+  inline StopRegister(std::string bpt_file_identifier_, std::string bpt_file_path_)
+      : bpt_file_identifier(std::move(bpt_file_identifier_)), bpt_file_path(std::move(bpt_file_path_)) {
+    bpt_disk_manager = new DiskManager(bpt_file_path);
+    bpt_bpm = new BufferPoolManager(100, 5, bpt_disk_manager);
+    bpt_indexer = new BPlusTreeIndexer<stop_register_t, std::less<stop_register_t>>(bpt_bpm);
+  }
+  inline ~StopRegister() {
+    delete bpt_indexer;
+    delete bpt_bpm;
+    delete bpt_disk_manager;
+  }
+  inline virtual sjtu::vector<FileEntry> ListFiles() override {
+    sjtu::vector<FileEntry> res;
+    res.push_back({bpt_file_identifier, bpt_file_path, bpt_disk_manager});
+    return res;
+  }
+  inline virtual void LockDownForCheckOut() override {
+    delete bpt_indexer;
+    delete bpt_bpm;
+    delete bpt_disk_manager;
+    bpt_indexer = nullptr;
+    bpt_bpm = nullptr;
+    bpt_disk_manager = nullptr;
+  }
+  inline virtual void Flush() override {
+    if (bpt_indexer == nullptr) return;
+    bpt_indexer->Flush();
+  }
+  inline void AddStopInfo(hash_t station_hash, hash_t train_hash, uint16_t true_saleDate_beg,
+                          uint16_t true_saleDate_end, uint16_t arrive_time_offset, uint16_t leave_time_offset) {
+    MinimalTrainRecord record_arrive, record_leave;
+    const static int June_1st_2024 = 152;
+    record_arrive.saleDate_beg = true_saleDate_beg - June_1st_2024;
+    record_arrive.saleDate_end = true_saleDate_end - June_1st_2024;
+    record_arrive.vis_time_offset = arrive_time_offset;
+    record_arrive.type = 0;
+    record_leave.saleDate_beg = true_saleDate_beg - June_1st_2024;
+    record_leave.saleDate_end = true_saleDate_end - June_1st_2024;
+    record_leave.vis_time_offset = leave_time_offset;
+    record_leave.type = 1;
+    if (arrive_time_offset != uint16_t(-1))
+      bpt_indexer->Put({station_hash, train_hash}, *reinterpret_cast<default_numeric_index_t *>(&record_arrive));
+    if (leave_time_offset != uint16_t(-1))
+      bpt_indexer->Put({station_hash, train_hash}, *reinterpret_cast<default_numeric_index_t *>(&record_leave));
+  }
+  inline void GetShareItems(std::vector<hash_t> &A, std::vector<hash_t> &B, std::vector<hash_t> &res) {
+    // TODO
+  }
+  inline void QueryDirectTrains(uint32_t date, hash_t from_station_ID, hash_t to_station_ID, std::vector<hash_t> &res) {
+    std::vector<hash_t> valid_trains_pass_from, valid_trains_pass_to;
+    res.clear();
+    // TODO
+    GetShareItems(valid_trains_pass_from, valid_trains_pass_to, res);
+  }
+};
+
+#endif

src/train_system.cpp

@@ -247,6 +247,21 @@ std::string TicketSystemEngine::ReleaseTrain(const std::string &command) {
   core_train_data.is_released = 1;
   core_train_data_storage.Put(train_id_hash, core_train_data);
   // TODO: update data to transaction system
+  int vis_time_offset = 0;
+  for (int i = 0; i < core_train_data.stationNum; i++) {
+    uint16_t arrive_time_offset = -1;
+    uint16_t leave_time_offset = -1;
+    if (i != 0) {
+      vis_time_offset += core_train_data.travelTime[i - 1];
+      arrive_time_offset = vis_time_offset;
+    }
+    if (i != core_train_data.stationNum - 1) {
+      if (i != 0) vis_time_offset += core_train_data.stopoverTime[i];
+      leave_time_offset = vis_time_offset;
+    }
+    stop_register.AddStopInfo(core_train_data.stations_hash[i], train_id_hash, core_train_data.saleDate_beg,
+                              core_train_data.saleDate_end, arrive_time_offset, leave_time_offset);
+  }
   response_stream << '[' << command_id << "] 0";
   return response_stream.str();
 }