Show information dialog about outdated database file

src/core/database.cpp

@@ -156,15 +156,19 @@ void Database::init()
     switch (version) {
     case 0:
         createNew();
+        initResult_ = InitResult::OK;
         break;
     case 1:
         updateDbToVer3();
+        initResult_ = InitResult::OUTDATED_REPLACED;
         break;
     case 2:
         updateDbToVer3();
+        initResult_ = InitResult::OUTDATED_REPLACED;
         break;
     default:
         // Do nothing because we are up-to-date.
+        initResult_ = InitResult::OK;
         break;
     }
 }

src/core/database.h

@@ -11,6 +11,7 @@
 class Database
 {
   public:
+    enum class InitResult {OK, OUTDATED_REPLACED};
     explicit Database(const std::string& dbname);
     Database();
     ~Database();
@@ -25,6 +26,7 @@ class Database
                            std::vector<std::unique_ptr<Seller>>& sellers);
     void updateCashPointNo(int oldCashPointNo, int newCashPointNo);
     void newDb();
+    InitResult getInitResult() {return initResult_;}
 
   private:
     sqlite3* db_{nullptr};
@@ -37,6 +39,7 @@ class Database
     unsigned int storeArticles(std::vector<Article*> articles);
     void updateDbToVer2();
     void updateDbToVer3();
+    InitResult initResult_{InitResult::OK};
 };
 
 #endif // DATABASE_H

src/core/marketplace.cpp

@@ -25,11 +25,12 @@ void Marketplace::storeToDb(bool onlyDelete)
     db.storeSales(sales_);
 }
 
-void Marketplace::loadFromDb()
+Database::InitResult Marketplace::loadFromDb()
 {
     Database db;
     db.loadSellers(sellers_);
     db.loadSales(sales_, sellers_);
+    return db.getInitResult();
 }
 
 SellersVec& Marketplace::getSellers() { return sellers_; }

src/core/marketplace.h

@@ -1,6 +1,7 @@
 #ifndef MARKETPLACE_H
 #define MARKETPLACE_H
 
+#include "database.h"
 #include "article.h"
 #include "sale.h"
 #include "seller.h"
@@ -23,7 +24,7 @@ class Marketplace
     Marketplace();
 
     void storeToDb(bool onlyDelete = false);
-    void loadFromDb();
+    Database::InitResult loadFromDb();
 
     SellersVec& getSellers();
     SalesVec& getSales();
@@ -69,4 +70,4 @@ std::string marketFeeAsString(int sumInCent, int percent, int maxFeeInCent);
 std::string paymentAsString(int sumInCent, int percent, int maxFeeInCent);
 std::string escapeCsvValue(const std::string& value, const char delimiter);
 
-#endif
+#endif

src/gui/mainwindow.cpp

@@ -35,7 +35,13 @@ MainWindow::MainWindow()
     ui_.setupUi(this);
 
     marketplace_ = std::make_unique<Marketplace>();
-    marketplace_->loadFromDb();
+    Database::InitResult res = marketplace_->loadFromDb();
+    if (res == Database::InitResult::OUTDATED_REPLACED) {
+        QMessageBox(QMessageBox::Icon::Information, "Datenbankinformation",
+                    "Es wurde eine <b>veraltete</b> Datenbankdatei erkannt.<br />Diese wurde "
+                    "umbenannt und eine <b>neue</b> Datei wurde erstellt.")
+            .exec();
+    }
     statusBar()->showMessage("Gespeicherte Daten wurden geladen.", STATUSBAR_TIMEOUT);
 
     BasketModel* model = new BasketModel(getMarketplace(), ui_.basketView);