//Command to fetch next message - made public to support unit testing
public async Task DoFetchNextMessageCommand()
{
NetworkOutcome = await DataModel.NextSaying();
if (NetworkOutcome.success == false)
{
await MainPageViewHelper.ShowErrorMessageAsync(NetworkOutcome.ErrorString);
}
}
//Event handler for all changes on the model
private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName.Equals(nameof(DataModel.SayingNumber)))
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(SayingNumber)));
}
else if (e.PropertyName.Equals(nameof(DataModel.HasData)))
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(HasNoData)));
}
else if (e.PropertyName.Equals(nameof(DataModel.CurrentSaying)))
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CurrentSaying)));
}
else if (e.PropertyName.Equals(nameof(DataModel.IsRequestingFromNetwork)))
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsRequestingFromNetwork)));
MainPageViewHelper.ChangeCanExecute(FetchNextSayingCommand);
}
}
