Initial cloud-services repo - gateway service + pkg modules

pkg/validator/can_id.go

@@ -0,0 +1,12 @@
+package validator
+
+import (
+	"regexp"
+
+	"github.com/go-playground/validator/v10"
+)
+
+func validateCANID(fl validator.FieldLevel) bool {
+	ok, _ := regexp.Match(`^[0-9]+(-[0-9]+)?$`, []byte(fl.Field().String()))
+	return ok
+}