Fix several group membership issue

TODO:
- check for other wrong uses of GetAttributeValue(s)
- refactor is_admin check

admin.go

@@ -19,11 +19,16 @@ func checkAdminLogin(w http.ResponseWriter, r *http.Request) *LoginStatus {
 	}
 
 	can_admin := (login.Info.DN == config.AdminAccount)
-	for _, group := range login.UserEntry.GetAttributeValues("memberof") {
+	fmt.Printf("%#v", login.UserEntry)
+	for _, attr := range login.UserEntry.Attributes {
+		if strings.EqualFold(attr.Name, "memberof") {
+			for _, group := range attr.Values {
 				if config.GroupCanAdmin != "" && group == config.GroupCanAdmin {
 					can_admin = true
 				}
 			}
+		}
+	}
 
 	if !can_admin {
 		http.Redirect(w, r, "/", http.StatusFound)

main.go

@@ -259,7 +259,9 @@ func handleHome(w http.ResponseWriter, r *http.Request) {
 
 	can_admin := (login.Info.DN == config.AdminAccount)
 	can_invite := false
-	for _, group := range login.UserEntry.GetAttributeValues("memberof") {
+	for _, attr := range login.UserEntry.Attributes {
+		if strings.EqualFold(attr.Name, "memberof") {
+			for _, group := range attr.Values {
 				if config.GroupCanInvite != "" && group == config.GroupCanInvite {
 					can_invite = true
 				}
@@ -267,6 +269,8 @@ func handleHome(w http.ResponseWriter, r *http.Request) {
 					can_admin = true
 				}
 			}
+		}
+	}
 
 	data := &HomePageData{
 		Login:       login,