Use dedicated type for each order field

Signed-off-by: gearnode <bryan@frimin.fr>

pkg/page/order_field.go

@@ -21,51 +21,6 @@ import (
 type (
 	OrderField interface {
 		Column() string
+		fmt.Stringer
 	}
-
-	GenericOrderField string
 )
-
-const (
-	OrderFieldCreatedAt GenericOrderField = "CREATED_AT"
-	OrderFieldUpdatedAt GenericOrderField = "UPDATED_AT"
-	OrderFieldName      GenericOrderField = "NAME"
-)
-
-func (of GenericOrderField) String() string {
-	return string(of)
-}
-
-func (of GenericOrderField) Column() string {
-	switch of {
-	case OrderFieldCreatedAt:
-		return "created_at"
-	case OrderFieldUpdatedAt:
-		return "updated_at"
-	case OrderFieldName:
-		return "name"
-	default:
-		return ""
-	}
-}
-
-func (of GenericOrderField) MarshalText() ([]byte, error) {
-	return []byte(of.String()), nil
-}
-
-func (of *GenericOrderField) UnmarshalText(data []byte) error {
-	val := string(data)
-
-	switch val {
-	case OrderFieldCreatedAt.String():
-		*of = OrderFieldCreatedAt
-	case OrderFieldUpdatedAt.String():
-		*of = OrderFieldUpdatedAt
-	case OrderFieldName.String():
-		*of = OrderFieldName
-	default:
-		return fmt.Errorf("invalid GenericOrderField value: %q", val)
-	}
-
-	return nil
-}