update

pkg/cart/mutation_remove_line_item_marking.go

@@ -0,0 +1,16 @@
+package cart
+
+import (
+	"fmt"
+	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+)
+
+func RemoveLineItemMarking(grain *CartGrain, req *messages.RemoveLineItemMarking) error {
+	for i, item := range grain.Items {
+		if item.Id == req.Id {
+			grain.Items[i].Marking = nil
+			return nil
+		}
+	}
+	return fmt.Errorf("item with ID %d not found", req.Id)
+}