reorganized code

helper/merge.go

@@ -0,0 +1,28 @@
+package helper
+
+import (
+	"reflect"
+
+	"github.com/imdario/mergo"
+)
+
+type ptrTransformer struct{}
+
+func (t ptrTransformer) Transformer(typ reflect.Type) func(dst, src reflect.Value) error {
+	if typ.Kind() == reflect.Ptr {
+		return func(dst, src reflect.Value) error {
+			if dst.CanSet() {
+				if dst.IsNil() {
+					dst.Set(src)
+				}
+			}
+			return nil
+		}
+	}
+	return nil
+}
+
+// Merge merges 2 objects or maps
+func Merge(dst, src interface{}) error {
+	return mergo.Merge(dst, src, mergo.WithTransformers(ptrTransformer{}))
+}