✨ Saving/Loading

CMakeLists.txt

@@ -3,16 +3,19 @@ project(main)
 set (CMAKE_CXX_STANDARD 17)
 
 if(NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE Release)
+set(CMAKE_BUILD_TYPE Release)
 endif()
 
 set(CMAKE_CXX_FLAGS "-Wall -Wextra")
 set(CMAKE_CXX_FLAGS_DEBUG "-g")
 set(CMAKE_CXX_FLAGS_RELEASE "-O3")
+
+find_package( Threads )
 add_executable(${PROJECT_NAME} main.cpp)
 
 target_include_directories(${PROJECT_NAME} PUBLIC include)
 target_include_directories(${PROJECT_NAME} PUBLIC third_party)
 
-# add_subdirectory(third_party/drogon)
-# target_link_libraries(${PROJECT_NAME} PRIVATE drogon)   
+add_subdirectory(third_party/drogon)
+target_link_libraries(${PROJECT_NAME} PRIVATE drogon)
+target_link_libraries(${PROJECT_NAME} PRIVATE ${CMAKE_THREAD_LIBS_INIT} )

include/bank.hpp

@@ -1,4 +1,5 @@
 #pragma once
+#include <fstream>
 #include "parallel-hashmap/parallel_hashmap/phmap.h"
 #include "user.hpp"
 
@@ -80,4 +81,43 @@ public:
 
         return state;
     }
+
+    //NOT THREAD SAFE, BY NO MEANS SHOULD THIS BE CALLED WHILE RECEIEVING REQUESTS
+    void Save() const
+    {
+        Json::StreamWriterBuilder builder;
+        const std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+
+        std::ofstream user_save("users.json");
+        Json::Value temp;
+        for (const auto &u : users)
+        {
+            std::cout << u.first << '\n';
+            temp[u.first] = u.second.Serialize();
+        }
+        writer->write(temp, &user_save);
+        user_save.close();
+    }
+    //NOT THREAD SAFE, BY NO MEANS SHOULD THIS BE CALLED WHILE RECEIEVING REQUESTS
+    void Load()
+    {
+        Json::CharReaderBuilder builder;
+
+        Json::Value temp;
+        std::ifstream user_save("users.json");
+        builder["collectComments"] = true;
+        JSONCPP_STRING errs;
+        if (!parseFromStream(builder, user_save, &temp, &errs))
+        {
+            user_save.close();
+        }
+        else
+        {
+            user_save.close();
+            for (const auto &u : temp.getMemberNames())
+            {
+                users.try_emplace(u, temp[u]["balance"].asUInt(), std::forward<std::string &&>(temp[u]["password"].asString()));
+            }
+        }
+    }
 } Bank;

include/user.hpp

@@ -1,4 +1,5 @@
 #pragma once
+#include <json/json.h>
 #include <string>
 
 struct User
@@ -20,4 +21,12 @@ struct User
      * @param init_pass initial password 
      */
     User(uint_fast32_t init_bal, std::string &&init_pass) : balance(init_bal), password(init_pass) {}
+
+    Json::Value Serialize() const
+    {
+        Json::Value res;
+        res["balance"] = balance;
+        res["password"] = password;
+        return res;
+    }
 };

main.cpp

@@ -1,15 +1,12 @@
 #include <iostream>
+#include <chrono>
+#include <thread>
 #include "bank.hpp"
 
 int main()
 {
-    Bank.admin_pass = "root";
-    std::cout << Bank.AddUser("Twix", "pass123") << '\n';
-    std::cout << Bank.GetBal("Twixy") << '\n';
-    std::cout << Bank.AdminAddUser("root", "Jollymonsam", 2500, "pass123") << '\n';
-    std::cout << Bank.GetBal("Jollymonsam") << '\n';
-    std::cout << Bank.SendFunds("Jollymonsam", "Twix", 333, "pass123") << '\n';
-    std::cout << Bank.GetBal("Twix") << " : " << Bank.GetBal("Jollymonsam") << '\n';
-
+    Bank.Load();
+    Bank.SendFunds("0", "1", 50, "root");
+    Bank.Save();
     return 0;
 }