public async Task <UserLoginResult> TryExternalLogin(string providedEmail = "", bool?didAcceptTerms = null)
{
var template = new LoginResultTemplate();
IUserContext userContext = null;
var email = providedEmail;
template.ExternalLoginInfo = await signInManager.GetExternalLoginInfoAsync();
if (template.ExternalLoginInfo == null)
{
template.RejectReasons.Add("signInManager.GetExternalLoginInfoAsync returned null");
}
else
{
template.User = await userManager.FindByLoginAsync(template.ExternalLoginInfo.LoginProvider, template.ExternalLoginInfo.ProviderKey);
if (template.User == null)
{
if (string.IsNullOrWhiteSpace(email))
{
email = template.ExternalLoginInfo.Principal.FindFirstValue(ClaimTypes.Email);
}
if (!string.IsNullOrWhiteSpace(email) && email.Contains("@"))
{
template.User = await userManager.FindByNameAsync(email);
}
}
if (template.User == null)
{
template.User = await CreateUserFromExternalLogin(template.ExternalLoginInfo, email, didAcceptTerms);
}
}
if (template.User != null)
{
await loginRulesProcessor.ProcessAccountLoginRules(template);
}
if (template.SignInResult == SignInResult.Failed && template.User != null && template.RejectReasons.Count == 0)
{
template.SignInResult = await signInManager.ExternalLoginSignInAsync(template.ExternalLoginInfo.LoginProvider, template.ExternalLoginInfo.ProviderKey, isPersistent : false);
if (template.SignInResult.Succeeded)
{
// TODO:
//update last login time
}
}
if (template.User != null &&
template.SignInResult != SignInResult.Success &&
template.SignInResult != SignInResult.TwoFactorRequired)
{
//clear the external login
await signInManager.SignOutAsync();
}
if (template.User != null)
{
userContext = new UserContext(template.User);
}
return(new UserLoginResult(
template.SignInResult,
template.RejectReasons,
userContext,
template.MustAcceptTerms,
template.NeedsAccountApproval,
template.NeedsEmailConfirmation,
template.EmailConfirmationToken,
template.NeedsPhoneConfirmation,
template.ExternalLoginInfo
));
}