Added sell commodity feature.

shop/shopservice.cpp

@@ -25,6 +25,8 @@ void ShopService::addShopItem(QSharedPointer<Voucher> voucher, QSharedPointer<IS
     vItem->setVatType(item->vatType());
 
     voucher->addItem(vItem);
+
+    updateRelatedItem(vItem.data(), count);
 }
 
 void ShopService::calculate(QSharedPointer<Voucher> voucher)
@@ -106,6 +108,18 @@ void ShopService::pay(QSharedPointer<Voucher> voucher)
     tx.commit();
 }
 
+void ShopService::updateRelatedItem(VoucherItem* item, int countAdded)
+{
+    IPlugin *plugin = Context::instance().plugin(item->itemPlugin());
+    IService *srv = (plugin != NULL ? plugin->service<IService>() : NULL);
+    ISellableService *selSrv = dynamic_cast<ISellableService*>(srv);
+
+    if (selSrv != NULL)
+    {
+        selSrv->addedToVoucher(item->refId(), countAdded);
+    }
+}
+
 QList<QSharedPointer<Voucher> > ShopService::savedVouchers()
 {
     return all(QString("status = %1").arg(QString::number(Voucher::NOT_PAID)));