private string CheckTargetLocation(BasePlayer player, Vector3 targetLocation, bool build, bool owner)
        {
            BuildingBlock buildingBlock1 = (BuildingBlock)null;
            BuildingPrivlidge cup = (BuildingPrivlidge)null;
            var entities = Pool.GetList<BuildingBlock>();

            Vis.Entities(targetLocation, 0.1f, entities, blockLayer);
            var cups = false;
            for (int index = 0; index < entities.Count; ++index)
            {
                BuildingBlock buildingBlock2 = entities[index];
                if (buildingBlock2.IsOlderThan((BaseEntity)buildingBlock1))
                {
                    BuildingManager.Building building = buildingBlock2.GetBuilding();
                    if (building != null)
                    {
                        BuildingPrivlidge buildingPrivilege = building.GetDominatingBuildingPrivilege();
                        if (!((UnityEngine.Object)buildingPrivilege == (UnityEngine.Object)null))
                        {
                            buildingBlock1 = buildingBlock2;
                            cup = buildingPrivilege;
                        }
                    }
                }
            }
            if (cup == null)
            {
                return null;
            }
            cups = true;
            if (owner)
            {
                var returnhook = BuildingOwners?.Call("FindBlockData", buildingBlock1);
                if (returnhook is string)
                {
                    string ownerid = (string) returnhook;
                    if (player.userID.ToString() == ownerid)
                    {
                        Pool.FreeList(ref entities);
                        return null;
                    }

                    var returnHasFriend = Clans?.CallHook("HasFriend", Convert.ToUInt64(ownerid), player.userID);
                    if (returnHasFriend != null && (bool)returnHasFriend)
                    {
                        Pool.FreeList(ref entities);
                        return null;
                    }
                }

                if (returnhook is bool || returnhook == null)
                {
                    if (player.userID == cup.OwnerID)
                    {
                        Pool.FreeList(ref entities);
                        return null;
                    }

                    var hasFriend = Clans?.CallHook("HasFriend", cup.OwnerID, player.userID);
                    if (hasFriend != null && (bool)hasFriend)
                    {
                        Pool.FreeList(ref entities);
                        return null;
                    }
                }
            }
            if (cup.IsAuthed(player))
            {
                Pool.FreeList(ref entities);
                return null;
            }
            Pool.FreeList(ref entities);
            return cups && !build ? "TPIntoBuildingBlocked" : null;
        }