feat: add regex support for account item (#2714)

* feat: add regex support for account item

* feat: use reflect to process user field

* fix: fix lint problem

* feat: improve code format and fix reflect error

object/user.go

@@ -15,7 +15,9 @@
 package object
 
 import (
+	"encoding/json"
 	"fmt"
+	"reflect"
 	"strconv"
 	"strings"
 
@@ -221,6 +223,26 @@ type ManagedAccount struct {
 	SigninUrl   string `xorm:"varchar(200)" json:"signinUrl"`
 }
 
+func GetUserFieldStringValue(user *User, fieldName string) (bool, string, error) {
+	val := reflect.ValueOf(*user)
+	fieldValue := val.FieldByName(fieldName)
+
+	if !fieldValue.IsValid() {
+		return false, "", nil
+	}
+
+	if fieldValue.Kind() == reflect.String {
+		return true, fieldValue.String(), nil
+	}
+
+	marshalValue, err := json.Marshal(fieldValue.Interface())
+	if err != nil {
+		return false, "", err
+	}
+
+	return true, string(marshalValue), nil
+}
+
 func GetGlobalUserCount(field, value string) (int64, error) {
 	session := GetSession("", -1, -1, field, value, "", "")
 	return session.Count(&User{})