/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used such as when the application is launched to open a specific file.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
Frame rootFrame = Window.Current.Content as Frame;
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
rootFrame.NavigationFailed += OnNavigationFailed;
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
}
if (e.PrelaunchActivated == false)
{
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
var localStorage = new LocalStorage();
if (!string.IsNullOrEmpty(localStorage.GetAccessToken()))
{
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
else
{
rootFrame.Navigate(typeof(Login), e.Arguments);
}
}
// Ensure the current window is active
Window.Current.Activate();
}
}
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
// See if the request has an authorize header
var auth = request.Headers.Authorization;
if (auth != null)
{
var accessToken = localStorage.GetAccessToken();
request.Headers.Authorization = new AuthenticationHeaderValue(auth.Scheme, accessToken);
}
var result = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
if (result.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
Console.WriteLine("User is unauthorized.");
Console.WriteLine("Refreshing Access Token...");
// refresh access_token
// resend
}
return(result);
}
//set root page: along with ENV: Pos or Customer
private Page GetRootPage()
{
Page rootPage;
if (string.IsNullOrEmpty(LocalStorage.GetAccessToken()))
{
// first use app, no access_token -> login at first
rootPage = new PosLoginPage();
}
else
{
// have access_token: not need to login
//ENV = Pos
if (LocalStorage.GetEnviroment() == Constants.POS_ENV)
{
rootPage = new CustomerListPage();
}
else // ENV = customer
{
rootPage = new CustomerLoginPage();
}
}
return(new NavigationPage(rootPage));
}
public static void SetDefaultHeaders(this HttpClient client)
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", LocalStorage.GetAccessToken());
}
