public void RefreshRecipes()
{
AllRecipes.Clear();
foreach (var item in _dataSvc.GetAllRecipes())
{
AllRecipes.Add(item);
}
}
public RecipeViewModel(INavigation navigation, IUserDialogs dialogs, IPopupNavigation popupNavigation, IApiService apiService)
{
_apiService = apiService;
Navigation = navigation;
Dialogs = dialogs;
bool canFetchRecipes = false;
FetchRecipesCommand = new Command(async() =>
{
CanInitiateNewFetchRecipes(false);
try
{
Dialogs?.ShowLoading("Fetching recipes for you...");
if (Connectivity.NetworkAccess == NetworkAccess.Internet)
{
try
{
if (PageSize == 100) //max page size reached
{
Dialogs?.HideLoading();
await Dialogs?.AlertAsync("The end of the list has been reached :(", "Notice", "OK");
return;
}
var RecipesRetrieved = await _apiService.GetAllRecipes(PageSize);
if (RecipesRetrieved != null)
{
if (RecipesRetrieved.results.Count > 0)
{
foreach (var data in RecipesRetrieved.results)
{
AllRecipes.Add(data);
}
}
PageSize++;
Items = (AllRecipes.Count) - 1;
Dialogs?.HideLoading();
}
else
{
Dialogs?.HideLoading();
await Dialogs?.AlertAsync("No data found!. Please try again later.", "Error", "OK");
}
}
catch (ApiException ex)
{
Dialogs?.HideLoading();
popupNavigation?.PopAsync();
await Dialogs?.AlertAsync(ex.Content, ex.Name, "OK");
}
catch (Exception ex)
{
Dialogs?.HideLoading();
await Dialogs?.AlertAsync("An unexpected error has occurred. Please try again.", "Error", "OK");
Debug.WriteLine(ex);
}
}
else
{
Dialogs?.HideLoading();
popupNavigation?.PopAsync();
await Dialogs?.AlertAsync("You seem to be offline. Please connect to the Wi-Fi and try again.", "Error", "OK");
}
}
catch (Exception e)
{
Debug.WriteLine(e);
Dialogs?.HideLoading();
}
CanInitiateNewFetchRecipes(true);
}, () => canFetchRecipes);
void CanInitiateNewFetchRecipes(bool value)
{
canFetchRecipes = value; ((Command)FetchRecipesCommand).ChangeCanExecute();
}
}
