private async void PlanetList_ItemAppearing(object sender, ItemVisibilityEventArgs e)
{
if (PlanetsList.Count == PlanetResponse.count)
{
PlanetListView.ItemAppearing += null;
return;
}
var planet = e.Item as Planet;
if (PlanetsList != null && PlanetsList.LastOrDefault() == planet)
{
PlanetListView.Footer = new ActivityIndicator()
{
IsVisible = true, IsRunning = true, Color = Color.Black
};
PlanetResponse = await PlanetsApi.GetPlanestList(PlanetResponse.next);
PlanetListView.Footer = null;
if (PlanetResponse.results != null && PlanetsList != null && PlanetsList.Count > 0)
{
var list = PlanetResponse.results;
list.ForEach(product => PlanetsList.Add(product));
}
}
}
public static async Task <PlanetResponse> GetPlanestList(string url)
{
HttpClient RestClient = new HttpClient();
try
{
HttpResponseMessage response = await RestClient.GetAsync(url);
if (response.IsSuccessStatusCode)
{
var JsonResponse = await response.Content.ReadAsStringAsync();
PlanetResponse PlanetResponse = JsonConvert.DeserializeObject <PlanetResponse>(JsonResponse);
return(PlanetResponse);
}
else
{
return(null);
}
}
catch (Exception ex)
{
return(null);
}
}
public PlanetViewModel PopulatePlanetViewModel(PlanetResponse planetResponse)
{
var planetViewModel = new PlanetViewModel();
planetViewModel.Name = planetResponse.Name;
planetViewModel.Url = planetResponse.Url;
return(planetViewModel);
}
public async Task <IActionResult> GetAllPlanets()
{
var model = new PlanetResponse();
var response = await _planetClient.GetPlanetInfo();
model.results = response.results;
model.next = response.next;
model.previous = response.previous;
return(View(model));
}
public async Task <IActionResult> ChangePage(string url)
{
var UrlStrippedToPageInfo = url.Substring(url.Length - 15);
var model = new PlanetResponse();
var response = await _planetClient.GetPlanetInfo(UrlStrippedToPageInfo);
model.results = response.results;
model.previous = response.previous;
model.next = response.next;
return(View("GetAllPlanets", model));
}
private async void Setup()
{
PlanetResponse = await PlanetsApi.GetPlanestList(PlanetsApi.BASE_URL);
PlanetsList = new ObservableCollection <Planet>(PlanetResponse.results);
LoadingView.IsVisible = false;
if (PlanetsList != null)
{
EmptyView.IsVisible = false;
PlanetListView.IsVisible = true;
PlanetListView.ItemTemplate = new DataTemplate(() => new PlanetItemCell());
PlanetListView.ItemsSource = PlanetsList;
PlanetListView.ItemSelected += OnPlanetSelected;
PlanetListView.ItemAppearing += PlanetList_ItemAppearing;
}
else
{
EmptyView.IsVisible = true;
}
}
