create db at the right place

src/core/database.cpp

@@ -1,17 +1,36 @@
 #include "database.h"
 
+#include <filesystem>
 #include <iostream>
 #include <stdexcept>
 #include <vector>
 
-Database::Database(const std::string& dbname) : db_(nullptr)
+Database::Database(const std::string& dbname)
 {
     dbname_ = dbname;
-    const int errCode = sqlite3_open(dbname_.c_str(), &db_);
-    if (errCode) {
-        throw std::runtime_error("Could not open database file.");
+    init();
+}
+
+Database::Database()
+{
+    namespace fs = std::filesystem;
+#if defined(__linux__)
+    fs::path dbpath = fs::path(std::getenv("HOME")) / ".local/share/kima2-cpp";
+#elif defined(__WIN64) || defined(__WIN32)
+    fs::path dbpath = fs::path(std::getenv("LOCALAPPDATA") / "/kima2-cpp";
+#else
+    throw std::runtime_error("Platform not supported.");
+#endif
+    if (!fs::exists(dbpath)) {
+        try {
+            fs::create_directories(dbpath);
+        } catch (fs::filesystem_error& err) {
+            throw err;
+        }
     }
-    sqlite3_db_config(db_, SQLITE_DBCONFIG_ENABLE_FKEY);
+    dbpath /= "kima2.db";
+    dbname_ = dbpath.string();
+    init();
 }
 
 Database::~Database() { sqlite3_close(db_); }
@@ -82,6 +101,12 @@ void Database::createNew()
 
 void Database::init()
 {
+    const int errCode = sqlite3_open(dbname_.c_str(), &db_);
+    if (errCode) {
+        throw std::runtime_error("Could not open database file.");
+    }
+    sqlite3_db_config(db_, SQLITE_DBCONFIG_ENABLE_FKEY);
+
     int version = getVersion();
 
     switch (version) {
@@ -253,7 +278,7 @@ unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& seller
 
     endTransaction();
 
-     // Everything went fine, so we can now update our objects
+    // Everything went fine, so we can now update our objects
     sellers.erase(std::remove_if(sellers.begin(), sellers.end(),
                                  [](const std::unique_ptr<Seller>& seller) {
                                      return (seller->getState() == Seller::State::DELETE);

src/core/database.h

@@ -10,17 +10,18 @@
 class Database
 {
   public:
-    Database(const std::string& dbname);
+    explicit Database(const std::string& dbname);
+    Database();
     ~Database();
     Database(const Database&) = delete;
     Database& operator=(const Database&) = delete;
     void exec(const std::string& sql);
-    void init();
     unsigned int storeSellers(std::vector<std::unique_ptr<Seller>>& sellers);
 
   private:
-    sqlite3* db_;
+    sqlite3* db_{nullptr};
     std::string dbname_;
+    void init();
     void beginTransaction();
     void endTransaction();
     void createNew();

src/core/marketplace.cpp

@@ -12,10 +12,9 @@ Marketplace::Marketplace()
 
 void Marketplace::storeToDb()
 {
-    const std::string DB_PATH{"/tmp/kima2.db"};
+    //const std::string DB_PATH{"/tmp/kima2.db"};
 
-    Database db(DB_PATH);
-    db.init();
+    Database db;
     db.storeSellers(sellers_);
 }