Add copy mapper

types/mapper/copy.go

@@ -0,0 +1,42 @@
+package mapper
+
+import (
+	"fmt"
+
+	"github.com/rancher/norman/types"
+)
+
+type Copy struct {
+	From, To string
+}
+
+func (c Copy) FromInternal(data map[string]interface{}) {
+	if data == nil {
+		return
+	}
+	v, ok := data[c.From]
+	if ok {
+		data[c.To] = v
+	}
+}
+
+func (c Copy) ToInternal(data map[string]interface{}) {
+	if data == nil {
+		return
+	}
+	t, tok := data[c.To]
+	_, fok := data[c.From]
+	if tok && !fok {
+		data[c.From] = t
+	}
+}
+
+func (c Copy) ModifySchema(s *types.Schema, schemas *types.Schemas) error {
+	f, ok := s.ResourceFields[c.From]
+	if !ok {
+		return fmt.Errorf("field %s missing on schema %s", c.From, s.ID)
+	}
+
+	s.ResourceFields[c.To] = f
+	return nil
+}