feat: Support uploading roles and permssions via xlsx files. (#1899)

* Support uploading roles and permissions via xlsx file.

* Template xlsx file for uploading users and permissions.

* reformat according to gofumpt.

* fix typo.

object/user_upload.go

@@ -15,6 +15,9 @@
 package object
 
 import (
+	"sort"
+	"strings"
+
 	"github.com/casdoor/casdoor/util"
 	"github.com/casdoor/casdoor/xlsx"
 )
@@ -47,6 +50,26 @@ func parseLineItemBool(line *[]string, i int) bool {
 	return parseLineItemInt(line, i) != 0
 }
 
+func parseListItem(lines *[]string, i int) []string {
+	if i >= len(*lines) {
+		return nil
+	}
+	line := (*lines)[i]
+	items := strings.Split(line, ";")
+	trimmedItems := make([]string, 0, len(items))
+
+	for _, item := range items {
+		trimmedItem := strings.TrimSpace(item)
+		if trimmedItem != "" {
+			trimmedItems = append(trimmedItems, trimmedItem)
+		}
+	}
+
+	sort.Strings(trimmedItems)
+
+	return trimmedItems
+}
+
 func UploadUsers(owner string, fileId string) bool {
 	table := xlsx.ReadXlsxFile(fileId)