add carts

app/utils/const_data/consts.go

@@ -3,3 +3,5 @@ package constdata
 // PASSWORD_VALIDATION_REGEX is used by the frontend (JavaScript supports lookaheads).
 const PASSWORD_VALIDATION_REGEX = `^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).{10,}$`
 const SHOP_ID = 1
+const MAX_AMOUNT_OF_CARTS_PER_USER = 10
+const DEFAULT_NEW_CART_NAME = "new cart"

app/utils/responseErrors/responseErrors.go

@@ -51,6 +51,10 @@ var (
 
 	// Typed errors for menu handler
 	ErrNoRootFound = errors.New("no root found in categories table")
+
+	// Typed errors for carts handler
+	ErrMaxAmtOfCartsReached = errors.New("maximal amount of carts reached")
+	ErrUserHasNoSuchCart    = errors.New("user does not have cart with given id")
 )
 
 // Error represents an error with HTTP status code
@@ -141,6 +145,11 @@ func GetErrorCode(c fiber.Ctx, err error) string {
 	case errors.Is(err, ErrNoRootFound):
 		return i18n.T_(c, "error.no_root_found")
 
+	case errors.Is(err, ErrMaxAmtOfCartsReached):
+		return i18n.T_(c, "error.max_amt_of_carts_reached")
+	case errors.Is(err, ErrUserHasNoSuchCart):
+		return i18n.T_(c, "error.max_amt_of_carts_reached")
+
 	default:
 		return i18n.T_(c, "error.err_internal_server_error")
 	}
@@ -176,7 +185,9 @@ func GetErrorStatus(err error) int {
 		errors.Is(err, ErrBadField),
 		errors.Is(err, ErrInvalidXHTML),
 		errors.Is(err, ErrBadPaging),
-		errors.Is(err, ErrNoRootFound):
+		errors.Is(err, ErrNoRootFound),
+		errors.Is(err, ErrMaxAmtOfCartsReached),
+		errors.Is(err, ErrUserHasNoSuchCart):
 		return fiber.StatusBadRequest
 	case errors.Is(err, ErrEmailExists):
 		return fiber.StatusConflict