public static async Task <MSession> GetSessionAsync(IWin32Window fromWindow)
{
var login = new MLogin();
var session = login.ReadSessionCache();
bool CheckSession() => session?.CheckIsValid() == true;
if (CheckSession() /* Try auto-login if a valid session existed in the cache */)
{
var loginResult = await login.TryAutoLoginAsync(session);
session = loginResult.IsSuccess ? loginResult.Session : null;
}
if (!CheckSession() /* Try manual login */)
{
var loginForm = Services.CreateInstance <LoginForm>();
var loginResult = loginForm.ShowDialog(fromWindow);
if (loginResult != DialogResult.OK)
{
return(null);
}
session = loginForm.Session;
}
if (!CheckSession() /* Should never get here */)
{
MessageBox.Show(fromWindow,
"Could not start a valid Mojang user session for Minecraft.",
"Session Failure",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return(null);
}
return(session);
}