add carts

app/service/cartsService/cartsService.go

@@ -0,0 +1,59 @@
+package cartsService
+
+import (
+	"git.ma-al.com/goc_daniel/b2b/app/model"
+	"git.ma-al.com/goc_daniel/b2b/app/repos/cartsRepo"
+	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
+)
+
+type CartsService struct {
+	repo cartsRepo.UICartsRepo
+}
+
+func New() *CartsService {
+	return &CartsService{
+		repo: cartsRepo.New(),
+	}
+}
+
+func (s *CartsService) CreateNewCart(user_id uint) (model.CustomerCart, error) {
+	var cart model.CustomerCart
+
+	customers_carts_amount, err := s.repo.CartsAmount(user_id)
+	if err != nil {
+		return cart, err
+	}
+	if customers_carts_amount >= constdata.MAX_AMOUNT_OF_CARTS_PER_USER {
+		return cart, responseErrors.ErrMaxAmtOfCartsReached
+	}
+
+	// create new cart for customer
+	cart, err = s.repo.CreateNewCart(user_id)
+
+	return cart, nil
+}
+
+func (s *CartsService) UpdateCartName(user_id uint, cart_id uint, new_name string) error {
+	amt, err := s.repo.UserHasCart(user_id, cart_id)
+	if err != nil {
+		return err
+	}
+	if amt != 1 {
+		return responseErrors.ErrUserHasNoSuchCart
+	}
+
+	return s.repo.UpdateCartName(user_id, cart_id, new_name)
+}
+
+func (s *CartsService) RetrieveCart(user_id uint, cart_id uint) (*model.CustomerCart, error) {
+	amt, err := s.repo.UserHasCart(user_id, cart_id)
+	if err != nil {
+		return nil, err
+	}
+	if amt != 1 {
+		return nil, responseErrors.ErrUserHasNoSuchCart
+	}
+
+	return s.repo.RetrieveCart(user_id, cart_id)
+}