public GroupModulesResponse Post(GroupModules request)
        {
            if (request.GroupModule.Id > 0)
              {
            Bm2s.Data.Common.BLL.User.GroupModule item = Datas.Instance.DataStorage.GroupModules[request.GroupModule.Id];
            item.Granted = request.GroupModule.Granted;
            item.GrantorId = request.GroupModule.Grantor.Id;
            item.GroupId = request.GroupModule.Group.Id;
            item.ModuleId = request.GroupModule.Module.Id;
            Datas.Instance.DataStorage.GroupModules[request.GroupModule.Id] = item;
              }
              else
              {
            Bm2s.Data.Common.BLL.User.GroupModule item = new Data.Common.BLL.User.GroupModule()
            {
              Granted = request.GroupModule.Granted,
              GrantorId = request.GroupModule.Grantor.Id,
              GroupId = request.GroupModule.Group.Id,
              ModuleId = request.GroupModule.Module.Id
            };

            Datas.Instance.DataStorage.GroupModules.Add(item);
            request.GroupModule.Id = item.Id;
              }

              GroupModulesResponse response = new GroupModulesResponse();
              response.GroupModules.Add(request.GroupModule);
              return response;
        }
        public GroupModulesResponse Delete(GroupModules request)
        {
            Bm2s.Data.Common.BLL.User.GroupModule item = Datas.Instance.DataStorage.GroupModules[request.GroupModule.Id];
              Datas.Instance.DataStorage.GroupModules.Remove(item);

              GroupModulesResponse response = new GroupModulesResponse();
              response.GroupModules.Add(request.GroupModule);
              return response;
        }
        public GroupModulesResponse Get(GroupModules request)
        {
            GroupModulesResponse response = new GroupModulesResponse();
              List<Bm2s.Data.Common.BLL.User.GroupModule> items = new List<Data.Common.BLL.User.GroupModule>();
              if (!request.Ids.Any())
              {
            items.AddRange(Datas.Instance.DataStorage.GroupModules.Where(item =>
              (request.GrantorId == 0 || item.GrantorId == request.GrantorId) &&
              (request.GroupId == 0 || item.GroupId == request.GroupId) &&
              (request.ModuleId == 0 || item.ModuleId == request.ModuleId)
              ));
              }
              else
              {
            items.AddRange(Datas.Instance.DataStorage.GroupModules.Where(item => request.Ids.Contains(item.Id)));
              }

              var collection = (from item in items
                        select new Bm2s.Poco.Common.User.GroupModule()
                        {
                          Granted = item.Granted,
                          Grantor = new UsersService().Get(new Users() { Ids = new List<int>() { item.GrantorId } }).Users.FirstOrDefault(),
                          Group = new GroupsService().Get(new Groups() { Ids = new List<int>() { item.GroupId } }).Groups.FirstOrDefault(),
                          Id = item.Id,
                          Module = new ModulesService().Get(new Modules() { Ids = new List<int>() { item.ModuleId } }).Modules.FirstOrDefault()
                        }).AsQueryable().OrderBy(request.Order, !request.DescendingOrder);

              response.ItemsCount = collection.Count();
              if (request.PageSize > 0)
              {
            response.GroupModules.AddRange(collection.Skip((request.CurrentPage - 1) * request.PageSize).Take(request.PageSize));
              }
              else
              {
            response.GroupModules.AddRange(collection);
              }

              try
              {
            response.PagesCount = collection.Count() / response.GroupModules.Count + (collection.Count() % response.GroupModules.Count > 0 ? 1 : 0);
              }
              catch
              {
            response.PagesCount = 1;
              }

              return response;
        }