public async Task <IActionResult> Index(int pageNum = 1)
{
var asteroids = await nasaService.GetAsteroidDataCollectionAsync(pageNum - 1, PageSize);
if (asteroids == null || !asteroids.Asteroids.Any())
{
return(View("Error", new ErrorViewModel
{
ErrorMessage = $"Page number '{pageNum}' doesn't exist."
}));
}
var viewModel = mapper.Map <AsteroidPageViewModel>(asteroids);
viewModel.PageNumber++;
return(View("AsteroidList", viewModel));
}
/// <summary>
/// Downloads a specific asteroid page from the Nasa Api as an xlsx file.
/// </summary>
/// <param name="pageNum">Page to download.</param>
/// <returns></returns>
public async Task <IActionResult> DownloadFile(int pageNum)
{
//We subtract one since this page variable comes from the view which has the page count incremented
//by one so it displays properly.
var asteroids = await nasaService.GetAsteroidDataCollectionAsync(pageNum - 1, PageSize);
if (asteroids == null)
{
return(View("Error", new ErrorViewModel
{
ErrorMessage = $"Page number '{pageNum}'s doesn't exist."
}));
}
var sheets = excelConverter.CreateSpreadsheets(asteroids.Asteroids);
var excelPackage = excelConverter.CreateExcelPackage(sheets);
var file = await excelPackage.GetAsByteArrayAsync();
return(File(file, ContentType, string.Format(FileName, pageNum)));
}