Added favorite buttons to shop form.

closes #276

commodity/commodityservice.cpp

@@ -29,3 +29,9 @@ void CommodityService::addedToVoucher(int itemId, int countAdded)
 
     update(commodity);
 }
+
+ShopItemPtr CommodityService::shopItem(int itemId)
+{
+    CommodityDataPtr item = this->loadById(itemId);
+    return qSharedPointerDynamicCast<ShopItem, CommodityData>(item);
+}

commodity/commodityservice.h

@@ -12,8 +12,10 @@ public:
 
     // ISellableService interface
 public:
-    QList<QSharedPointer<ShopItem> > shopItems() override;
+    QList<ShopItemPtr> shopItems() override;
     void addedToVoucher(int itemId, int countAdded) override;
+    virtual ShopItemPtr shopItem(int itemId) override;
+
 };
 
 #endif // COMMODITYSERVICE_H

commodity/data/commoditydata.h

@@ -68,4 +68,6 @@ public:
     QString pluginId() override;
 };
 
+typedef QSharedPointer<CommodityData> CommodityDataPtr;
+
 #endif // COMMODITYDATA_H