refactor and bulk insert

scanner/folder_stack.go

@@ -2,26 +2,26 @@ package scanner
 
 import "github.com/sentriz/gonic/model"
 
-type folderStack []*model.Folder
+type folderStack []model.Folder
 
-func (s *folderStack) Push(v *model.Folder) {
+func (s *folderStack) Push(v model.Folder) {
 	*s = append(*s, v)
 }
 
-func (s *folderStack) Pop() *model.Folder {
+func (s *folderStack) Pop() model.Folder {
 	l := len(*s)
 	if l == 0 {
-		return nil
+		return model.Folder{}
 	}
 	r := (*s)[l-1]
 	*s = (*s)[:l-1]
 	return r
 }
 
-func (s *folderStack) Peek() *model.Folder {
+func (s *folderStack) Peek() model.Folder {
 	l := len(*s)
 	if l == 0 {
-		return nil
+		return model.Folder{}
 	}
 	return (*s)[l-1]
 }