/// <summary>
/// The entry point for the Home page UI.
/// <return>
/// The Task corresponding to the ViewResult for the Home page UI.
/// </return>
/// <remarks>
/// Asynchronous because it makes an HTTP Get request via an HttpClient instance to get the list of
/// valid airport names.
/// </remarks>
/// </summary>
public async Task <IActionResult> Index()
{
try
{
_logger.LogInformation("WebApp requesting Airport data from WebAPI");
// Get valid airport names
var airports = await GetAirports();
_logger.LogInformation($"WebAPI responded with data for {airports.Count} airports.");
// Initialize the Home page view model with the valid airports
var viewModel = new HomeSearchViewModel
{
Airports = airports
};
return(View(viewModel));
}
catch (HttpRequestException) // This would indicate a failure such as internet loss
{
_logger.LogError("WebApp was unable to get airport data from WebAPI");
// Indicate that the service is unavailable
var viewModel = new HttpErrorPageViewModel(System.Net.HttpStatusCode.ServiceUnavailable);
return(View("HttpErrorPage", viewModel));
}
}
public async Task <IActionResult> Search(HomeSearchViewModel searchForm)
{
_logger.LogInformation($"Received form from the user:"******"Destination Airport: {searchForm.DestinationAirport}" + Environment.NewLine +
$"Origin Airport: {searchForm.OriginAirport}" + Environment.NewLine +
$"Return Date: {searchForm.ReturnDate}" + Environment.NewLine +
$"Takeoff Date: {searchForm.TakeOffDate}" + Environment.NewLine +
$"Round Trip: {searchForm.IsRoundTrip}");
_logger.LogInformation("WebApp requesting Airport data from WebAPI");
// Get the list of airports for validation
var airports = await GetAirports();
_logger.LogInformation($"WebAPI responded with data for {airports.Count} airports.");
// Make sure the Origin Airport name is valid
if (!airports.Select(a => a.AirportName).Contains(searchForm.OriginAirport))
{
ModelState.AddModelError("OriginAirport", "Invalid airport name");
}
// Make sure the Destination Airport name is valid
if (!airports.Select(a => a.AirportName).Contains(searchForm.DestinationAirport))
{
ModelState.AddModelError("DestinationAirport", "Invalid airport name");
}
// Perform other validation. See the data annotations on the HomeSearchViewModel class for more.
// If the validation fails, return ViewResult for the Home page with error information
if (!ModelState.IsValid)
{
_logger.LogWarning("Form validation failed.");
searchForm.Airports = airports;
return(View("Index", searchForm));
}
// Send the appropriate HTTP Get request or return to the home page if the form is in an invalid state.
if (!searchForm.IsRoundTrip)
{
_logger.LogInformation("WebApp querying WebAPI for one-way flight prices.");
try
{
return(await GetOneWayFlights(searchForm));
}
catch (FlightQuoteApiException ex) // This indicates a failure on the WebAPI side
{
var viewModel = new HttpErrorPageViewModel(ex.StatusCode);
return(View("HttpErrorPage", viewModel));
}
catch (HttpRequestException) // This indicates a failure such as internet loss
{
var viewModel = new HttpErrorPageViewModel(System.Net.HttpStatusCode.ServiceUnavailable);
return(View("HttpErrorPage", viewModel));
}
}
_logger.LogInformation("WebApp querying WebAPI for round-trip flight prices.");
try
{
// We've passed all validation and the only option remaining is roundtrip flights
return(await GetRoundTripFlights(searchForm));
}
catch (FlightQuoteApiException ex) // This indicates a failure on the WebAPI side
{
var viewModel = new HttpErrorPageViewModel(ex.StatusCode);
return(View("HttpErrorPage", viewModel));
}
catch (HttpRequestException) // This indicates a failure such as internet loss
{
var viewModel = new HttpErrorPageViewModel(System.Net.HttpStatusCode.ServiceUnavailable);
return(View("HttpErrorPage", viewModel));
}
}
