model: Add strict Ingredient.Validate()

1 files changed, 13 insertions, 0 deletions

diff --git a/model/validation.go b/model/validation.go
index d49141d..ac38777 100644
--- a/model/validation.go
+++ b/model/validation.go
@@ -26,3 +26,16 @@ func isPositiveOrZeroInt(s string) error {
 
 	return nil
 }
+
+func isPositiveOrZeroFloat(s string) error {
+	f, err := strconv.ParseFloat(s, 32)
+	if err != nil {
+		return fmt.Errorf("'%s' cannot be casted to floating point number", s)
+	}
+
+	if f < 0 {
+		return fmt.Errorf("'%s' is negative", s)
+	}
+
+	return nil
+}