public async Task <ICollection <Hit> > GetImagesAsync() { var composer = new HttpImageRequestComposer(); if (!composer.IsCorrectRequest) { await HttpRequestComposer.DisplayAlertAsync(); return(null); } var response = await _httpClient.GetAsync(composer.UrlRequest); if (!response.IsSuccessStatusCode) { var list = UnitOfWork.Hits.GetItems(); if (list is not null) { return(list); } HttpResponseHelper.DisplayNotSuccessfulStatusCodeAlert(response); return(null); } var content = await response.Content.ReadAsStringAsync(); var hits = JsonSerializer.Deserialize <GalleryResponse>(content)?.Hits; UnitOfWork.Hits.SaveItems(hits); return(hits); }