public async Task <IActionResult> ExternalLoginCallback(string returnUrl = null, string remoteError = null)
{
if (remoteError != null)
{
ModelState.AddModelError(string.Empty, $"Error from external provider: {remoteError}");
return(View(nameof(Login)));
}
var info = await _signInManager.GetExternalLoginInfoAsync();
if (info == null)
{
return(RedirectToAction(nameof(Login)));
}
// Sign in the user with this external login provider if the user already has a login.
var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent : false);
if (result.Succeeded)
{
_logger.LogInformation(5, "User logged in with {Name} provider.", info.LoginProvider);
return(RedirectToLocal(returnUrl));
}
if (result.RequiresTwoFactor)
{
return(RedirectToAction(nameof(SendCode), new { ReturnUrl = returnUrl }));
}
if (result.IsLockedOut)
{
return(View("Lockout"));
}
else
{
// If the user does not have an account, then ask the user to create an account.
ViewData["ReturnUrl"] = returnUrl;
ViewData["LoginProvider"] = info.LoginProvider;
var email = info.Principal.FindFirstValue(ClaimTypes.Email);
return(View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel {
Email = email
}));
}
}
public async Task <ActionResult> LinkLoginCallback()
{
var user = await GetCurrentUserAsync();
if (user == null)
{
return(View("Error"));
}
var info = await _signInManager.GetExternalLoginInfoAsync(await _userManager.GetUserIdAsync(user));
if (info == null)
{
return(RedirectToAction(nameof(ManageLogins), new { Message = ManageMessageId.Error }));
}
var result = await _userManager.AddLoginAsync(user, info);
var message = result.Succeeded ? ManageMessageId.AddLoginSuccess : ManageMessageId.Error;
return(RedirectToAction(nameof(ManageLogins), new { Message = message }));
}