refactor

scanner/stack.go

@@ -0,0 +1,40 @@
+package scanner
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/sentriz/gonic/model"
+)
+
+type folderStack []*model.Album
+
+func (s *folderStack) Push(v *model.Album) {
+	*s = append(*s, v)
+}
+
+func (s *folderStack) Pop() *model.Album {
+	l := len(*s)
+	if l == 0 {
+		return nil
+	}
+	r := (*s)[l-1]
+	*s = (*s)[:l-1]
+	return r
+}
+
+func (s *folderStack) Peek() *model.Album {
+	l := len(*s)
+	if l == 0 {
+		return nil
+	}
+	return (*s)[l-1]
+}
+
+func (s *folderStack) String() string {
+	paths := make([]string, len(*s))
+	for i, folder := range *s {
+		paths[i] = folder.LeftPath
+	}
+	return fmt.Sprintf("[%s]", strings.Join(paths, " "))
+}