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) {

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_);
 }
 

src/gui/CMakeLists.txt

@@ -18,4 +18,4 @@ set(GUI_SOURCES
 )
 
 add_executable(kima2 ${GUI_SOURCES})
-target_link_libraries(kima2 core Qt5::Widgets)
+target_link_libraries(kima2 core Qt5::Widgets stdc++fs)

src/gui/kima2.cpp

@@ -1,13 +1,10 @@
 #include "mainwindow.h"
 
-#include <memory>
-
 #include <QApplication>
 
-
 int main(int argc, char* argv[])
 {
-    //Q_INIT_RESOURCE(application);
+    // Q_INIT_RESOURCE(application);
 
     QApplication kimaApp{argc, argv};
 

test/test_database.cpp

@@ -9,14 +9,12 @@
 
 BOOST_AUTO_TEST_CASE(create_database)
 {
-    Database db(":memory:");
-    BOOST_CHECK_NO_THROW(db.init());
+    BOOST_CHECK_NO_THROW(Database db(":memory:"));
 }
 
 BOOST_AUTO_TEST_CASE(store_seller_fail)
 {
     Database db(":memory:");
-    db.init();
     std::vector<std::unique_ptr<Seller>> sellers;
     sellers.push_back(std::make_unique<Seller>());
     sellers.push_back(std::make_unique<Seller>());
@@ -25,7 +23,6 @@ BOOST_AUTO_TEST_CASE(store_seller_fail)
 BOOST_AUTO_TEST_CASE(store_sellers_succ)
 {
     Database db(":memory:");
-    db.init();
     std::vector<std::unique_ptr<Seller>> sellers;
     auto a = std::make_unique<Seller>();
     a->createUuid();
@@ -47,7 +44,6 @@ BOOST_AUTO_TEST_CASE(store_sellers_succ)
 BOOST_AUTO_TEST_CASE(seller_states)
 {
     Database db(":memory:");
-    db.init();
     std::vector<std::unique_ptr<Seller>> sellers;
     auto a = std::make_unique<Seller>();
     a->setSellerNo(3);