remove article (incomplete)

src/gui/salemodel.cpp

@@ -165,4 +165,26 @@ void SaleModel::onBasketDataChanged()
         return lhs->getTimestamp() > rhs->getTimestamp();
     });
     emit endResetModel();
+}
+
+bool SaleModel::removeRows(int row, int count, const QModelIndex& parent)
+{
+    if (!parent.isValid()) {
+        // remove complete sale
+
+    } else if (!parent.parent().isValid()) {
+        // remove one article from a sale
+        auto sale = static_cast<Sale*>(parent.internalPointer());
+        auto articles = sale->getArticles();
+        emit beginRemoveRows(parent, row, row + count -1);
+        articles.at(row)->setState(Article::State::DELETE);
+        sale->removeArticle(articles.at(row));
+        marketplace_->storeToDb();
+        if (articles.size() == 0) {
+            std::cout << "No articles left.\n";
+        }
+        emit endRemoveRows();
+    }
+
+    return true;
 }