basic db save

.gitignore

@@ -1,3 +1,4 @@
 a.out
 flake.lock
+db.json
 /.ccls-cache

README.md

@@ -5,6 +5,6 @@ And also my first serious C++ project.
 
 ## Roadmap
 - [X] Basic K/V store
-- [ ] Remove/add entries
+- [X] Remove/add entries
 - [ ] Serialisation and saving
 - [ ] Networking

main.cpp

@@ -1,12 +1,24 @@
 #include <vector>
 #include <string>
 #include <iostream>
+#include <fstream>
+#include "json.hpp"
 
-void add_entry(std::vector<std::vector<std::string>>& database, std::string key, std::string value) {
+using Db = std::vector<std::vector<std::string>>;
+
+void save_database(Db& database, std::string file_name) {
+  nlohmann::json json_data = database;
+  std::string serialised_json_data = json_data.dump();
+  std::ofstream db_file(file_name);
+  db_file << serialised_json_data;
+  db_file.close();
+}
+
+void add_entry(Db& database, std::string key, std::string value) {
   database.push_back({key, value});
 }
 
-void remove_entry(std::vector<std::vector<std::string>>& database, std::string key) {
+void remove_entry(Db& database, std::string key) {
   int index = 0;
   for (std::vector<std::string>& entry : database) {
     index++;
@@ -16,7 +28,7 @@ void remove_entry(std::vector<std::vector<std::string>>& database, std::string k
   }
 }
 
-void prompt_user(std::vector<std::vector<std::string>>& database) {
+void prompt_user(Db& database) {
   std::string mode;
   std::cin >> mode;
   if (mode == "add") {
@@ -29,13 +41,17 @@ void prompt_user(std::vector<std::vector<std::string>>& database) {
     std::string key;
     std::cin >> key;
     remove_entry(database, key);
+  } else if (mode == "save") {
+    std::string file;
+    std::cin >> file;
+    save_database(database, file);
   } else {
     prompt_user(database);
   }
 }
 
 int main() {
-  std::vector<std::vector<std::string>> database;
+  Db database;
 
   database = {
     { "name", "username" },