feat: use the casbin model to store relationships between users and groups (#2178)

* fix:reslove conflict

* fix: remove interface

object/user_enforcer.go

@@ -0,0 +1,95 @@
+package object
+
+import (
+	"github.com/casbin/casbin/v2"
+	"github.com/casbin/casbin/v2/errors"
+	"github.com/casdoor/casdoor/util"
+)
+
+type UserGroupEnforcer struct {
+	// use rbac model implement use group, the enforcer can also implement user role
+	enforcer *casbin.Enforcer
+}
+
+func NewUserGroupEnforcer(enforcer *casbin.Enforcer) *UserGroupEnforcer {
+	return &UserGroupEnforcer{
+		enforcer: enforcer,
+	}
+}
+
+func (e *UserGroupEnforcer) AddGroupForUser(user string, group string) (bool, error) {
+	return e.enforcer.AddRoleForUser(user, GetGroupWithPrefix(group))
+}
+
+func (e *UserGroupEnforcer) AddGroupsForUser(user string, groups []string) (bool, error) {
+	g := make([]string, len(groups))
+	for i, group := range groups {
+		g[i] = GetGroupWithPrefix(group)
+	}
+	return e.enforcer.AddRolesForUser(user, g)
+}
+
+func (e *UserGroupEnforcer) DeleteGroupForUser(user string, group string) (bool, error) {
+	return e.enforcer.DeleteRoleForUser(user, GetGroupWithPrefix(group))
+}
+
+func (e *UserGroupEnforcer) DeleteGroupsForUser(user string) (bool, error) {
+	return e.enforcer.DeleteRolesForUser(user)
+}
+
+func (e *UserGroupEnforcer) GetGroupsForUser(user string) ([]string, error) {
+	groups, err := e.enforcer.GetRolesForUser(user)
+	for i, group := range groups {
+		groups[i] = GetGroupWithoutPrefix(group)
+	}
+	return groups, err
+}
+
+func (e *UserGroupEnforcer) GetAllUsersByGroup(group string) ([]string, error) {
+	users, err := e.enforcer.GetUsersForRole(GetGroupWithPrefix(group))
+	if err != nil {
+		if err == errors.ERR_NAME_NOT_FOUND {
+			return []string{}, nil
+		}
+		return nil, err
+	}
+	return users, nil
+}
+
+func GetGroupWithPrefix(group string) string {
+	return "group:" + group
+}
+
+func GetGroupWithoutPrefix(group string) string {
+	return group[len("group:"):]
+}
+
+func (e *UserGroupEnforcer) GetUserNamesByGroupName(groupName string) ([]string, error) {
+	var names []string
+
+	userIds, err := e.GetAllUsersByGroup(groupName)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, userId := range userIds {
+		_, name := util.GetOwnerAndNameFromIdNoCheck(userId)
+		names = append(names, name)
+	}
+
+	return names, nil
+}
+
+func (e *UserGroupEnforcer) UpdateGroupsForUser(user string, groups []string) (bool, error) {
+	_, err := e.DeleteGroupsForUser(user)
+	if err != nil {
+		return false, err
+	}
+
+	affected, err := e.AddGroupsForUser(user, groups)
+	if err != nil {
+		return false, err
+	}
+
+	return affected, nil
+}