Now we can decide to make only-delete-changes in the db

src/core/database.cpp

@@ -172,7 +172,7 @@ void Database::beginTransaction() { exec("BEGIN TRANSACTION"); }
 
 void Database::endTransaction() { exec("END TRANSACTION"); }
 
-unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& sellers)
+unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& sellers, bool onlyDelete)
 {
     int retCode{};
     int count{};
@@ -181,7 +181,7 @@ unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& seller
     beginTransaction();
 
     for (auto& seller : sellers) {
-        if (seller->getState() == Seller::State::NEW) {
+        if (seller->getState() == Seller::State::NEW && !onlyDelete) {
             retCode = sqlite3_prepare_v2(
                 db_,
                 "INSERT INTO sellers"
@@ -214,7 +214,7 @@ unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& seller
             }
             ++count;
             sqlite3_finalize(stmt);
-        } else if (seller->getState() == Seller::State::UPDATE) {
+        } else if (seller->getState() == Seller::State::UPDATE && !onlyDelete) {
             retCode = sqlite3_prepare_v2(
                 db_,
                 "UPDATE sellers SET"

src/core/database.h

@@ -16,7 +16,7 @@ class Database
     Database(const Database&) = delete;
     Database& operator=(const Database&) = delete;
     void exec(const std::string& sql);
-    unsigned int storeSellers(std::vector<std::unique_ptr<Seller>>& sellers);
+    unsigned int storeSellers(std::vector<std::unique_ptr<Seller>>& sellers, bool onlyDelete = false);
     unsigned int loadSellers(std::vector<std::unique_ptr<Seller>>& sellers);
 
   private:

src/core/marketplace.cpp

@@ -10,10 +10,10 @@ Marketplace::Marketplace()
     sellers_.push_back(std::move(seller));
 }
 
-void Marketplace::storeToDb()
+void Marketplace::storeToDb(bool onlyDelete)
 {
     Database db;
-    db.storeSellers(sellers_);
+    db.storeSellers(sellers_, onlyDelete);
 }
 
 void Marketplace::loadFromDb()

src/core/marketplace.h

@@ -11,7 +11,7 @@ class Marketplace
 {
   public:
     Marketplace();
-    void storeToDb();
+    void storeToDb(bool onlyDelete = false);
     void loadFromDb();
     std::vector<std::unique_ptr<Seller>>& getSellers();
     int getNextSellerNo();

src/gui/sellermodel.cpp

@@ -149,7 +149,7 @@ bool SellerModel::removeRows(int row, int count, const QModelIndex& parent)
     } else {
         emit beginRemoveRows(parent, row, row + count - 1);
         seller->setState(Seller::State::DELETE);
-        marketplace_->storeToDb();
+        marketplace_->storeToDb(true);
         emit endRemoveRows();
     }