closes #1: Favorite buttons has been extended with category buttons.

camp/campgrid.cpp

@@ -125,7 +125,7 @@ void CampGrid::addToVoucher(const CampDataPtr& data)
 
     shopSrv.addShopItem(voucher, campItem, 1);
     shopSrv.calculate(voucher);
-    shopSrv.saveVoucher(voucher);
+    shopSrv.save(voucher);
 
     data->setOnVoucher(true);
 

camp/campservice.cpp

@@ -357,8 +357,12 @@ void CampService::addAccFee(const CampDataPtr& data, const AddressItemPtr& item,
     }
 }
 
-QList<IShopItemPtr> CampService::shopItems()
+QList<IShopItemPtr> CampService::shopItems(const QString& category)
 {
+    if (!category.isEmpty()) {
+        return {};
+    }
+
     CampShopItemPtr item(new CampShopItem);
 
     QList<IShopItemPtr> items;

camp/campservice.h

@@ -36,7 +36,7 @@ private:
 
     // ISellableService interface
 public:
-    QList<IShopItemPtr> shopItems() override;
+    QList<IShopItemPtr> shopItems(const QString& category = "") override;
     IShopItemPtr shopItem(int itemId) override;
     void addedToVoucher(int itemId, int countAdded) override;
     ISeller *seller() override;

camp/campshopitem.cpp

@@ -28,7 +28,7 @@ Enums::VatType CampShopItem::vatType()
     return m_vatType;
 }
 
-QString CampShopItem::pluginId()
+QString CampShopItem::pluginId() const
 {
     return "CAMP";
 }
@@ -48,7 +48,7 @@ void CampShopItem::setVatType(const Enums::VatType &vatType)
     m_vatType = vatType;
 }
 
-long CampShopItem::id()
+long CampShopItem::id() const
 {
     return m_id;
 }

camp/campshopitem.h

@@ -10,12 +10,12 @@ public:
 
     // IShopItem interface
 public:
-    long id() override;
+    long id() const override;
     QString name() override;
     QString shortName() override;
     QDecDouble unitPrice() override;
     Enums::VatType vatType() override;
-    QString pluginId() override;
+    QString pluginId() const override;
 
     // ShopItem interface
 public: