private async Task <AdvertisementItemDetails> MapToDetailsViewModel(AdvertisementItem advertisementFromDb)
        {
            var viewModel = new AdvertisementItemDetails();

            viewModel.Id                = advertisementFromDb.Id;
            viewModel.CityName          = advertisementFromDb.CityName != "brak" ? advertisementFromDb.CityName : String.Empty;
            viewModel.Title             = advertisementFromDb.Title;
            viewModel.Description       = advertisementFromDb.Description;
            viewModel.Size              = advertisementFromDb.Size;
            viewModel.CategoryInfoModel = new Models.Shared.Categories.CategoryInfoModel {
                Id = advertisementFromDb.CategoryId, Name = advertisementFromDb.Category.Name
            };
            viewModel.Price          = advertisementFromDb.Price;
            viewModel.IsOnlyForSell  = advertisementFromDb.IsOnlyForSell;
            viewModel.SellerId       = advertisementFromDb.UserId;
            viewModel.SellerName     = advertisementFromDb.User.UserName;
            viewModel.IsActive       = advertisementFromDb.ExpirationDate > DateTime.Now;
            viewModel.ExpirationDate = advertisementFromDb.ExpirationDate.Value;
            viewModel.Photos         = await GetPhotosList(advertisementFromDb.AdvertisementPhotos.Where(p => !p.IsMainPhoto).ToList());

            viewModel.IsSellerOnline = this.chatHubCacheService.IsUserConnected(advertisementFromDb.UserId);
            if (!String.IsNullOrEmpty(advertisementFromDb.User.UserProfilePhotoName))
            {
                viewModel.SellerProfileImage = await photosService.GetUserProfilePhotoInBytes(advertisementFromDb.User.UserProfilePhotoName);
            }
            return(viewModel);
        }