public async Task <IActionResult> OnGetLinkLoginCallbackAsync()
{
var user = await _userManager.GetUserAsync(User);
if (user == null)
{
return(NotFound($"Unable to load user with ID 'user.Id'."));
}
var info = await _signInManager.GetExternalLoginInfoAsync(user.Id);
if (info == null)
{
throw new InvalidOperationException($"Unexpected error occurred loading external login info for user with ID '{user.Id}'.");
}
var result = await _userManager.AddLoginAsync(user, info);
if (!result.Succeeded)
{
StatusMessage = "The external login was not added. External logins can only be associated with one account.";
return(RedirectToPage());
}
await TokenSaver.UpdateTokensAsync(_context, user, info);
// Clear the existing external cookie to ensure a clean login process
await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);
StatusMessage = "The external login was added.";
return(RedirectToPage());
}
public async Task <IActionResult> OnPostConfirmationAsync(string returnUrl = null)
{
returnUrl = returnUrl ?? Url.Content("~/");
// Get the information about the user from the external login provider
var info = await _signInManager.GetExternalLoginInfoAsync();
if (info == null)
{
ErrorMessage = "Error loading external login information during confirmation.";
return(RedirectToPage("./Login", new { ReturnUrl = returnUrl }));
}
if (ModelState.IsValid)
{
var user = new IdentityUser {
UserName = Input.UserName, Email = Guid.NewGuid() + "@example.com"
};
var result = await _userManager.CreateAsync(user);
if (result.Succeeded)
{
result = await _userManager.AddLoginAsync(user, info);
if (result.Succeeded)
{
await TokenSaver.UpdateTokensAsync(_context, user, info);
await _signInManager.SignInAsync(user, isPersistent : false);
_logger.LogInformation("User created an account using {Name} provider.", info.LoginProvider);
return(LocalRedirect(returnUrl));
}
}
foreach (var error in result.Errors)
{
ModelState.AddModelError(string.Empty, error.Description);
}
}
ProviderDisplayName = info.ProviderDisplayName;
ReturnUrl = returnUrl;
return(Page());
}