public async Task TryConnectExternalLoginToUser(IdentityUser user, string providerUserId, AuthenticateResult result)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
var email = result.Principal.Claims.FindEmail();
var provider = result.Properties.Items["scheme"];
var providerDisplayName = await _authenticationSchemeProvider.GetProviderDisplayName(provider);
var identityResult = await _userManager.AddLoginAsync(user, new UserLoginInfo(provider, providerUserId, providerDisplayName), email);
if (!identityResult.Succeeded)
{
throw new Exception(identityResult.Errors.First().Description);
}
}
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.Email, Email = Input.Email
};
var result = await _userManager.CreateAsync(user);
if (result.Succeeded)
{
var email = info.Principal.Claims.FindEmail();
result = await _userManager.AddLoginAsync(user, info, email);
if (result.Succeeded)
{
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);
}
}
LoginProvider = info.LoginProvider;
ReturnUrl = returnUrl;
return(Page());
}
public async Task <IActionResult> OnGetLinkLoginCallbackAsync()
{
var user = await _userManager.GetUserAsync(User);
if (user == null)
{
return(NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'."));
}
var info = await _signInManager.GetExternalLoginInfoAsync(await _userManager.GetUserIdAsync(user));
if (info == null)
{
throw new InvalidOperationException($"Unexpected error occurred loading external login info for user with ID '{user.Id}'.");
}
var logins = await _userManager.GetLoginsAsync(user);
if (logins.Any(l => l.LoginProvider == info.LoginProvider && l.ProviderKey == info.ProviderKey))
{
StatusMessage = "The external login is already linked to your account.";
return(RedirectToPage());
}
var email = info.Principal.Claims.FindEmail();
var result = await _userManager.AddLoginAsync(user, info, email);
if (!result.Succeeded)
{
throw new InvalidOperationException($"Unexpected error occurred adding external login for user with ID '{user.Id}'.");
}
// 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 MergeUsers(TUser currentUser, TUser user)
{
var observer = new IdentityResultObserver();
using (var transaction = new TransactionScope(
TransactionScopeOption.Required,
new TransactionOptions
{
IsolationLevel = IsolationLevel.ReadCommitted,
Timeout = TransactionManager.DefaultTimeout
},
TransactionScopeAsyncFlowOption.Enabled)
)
{
var roles = await _userManager.GetRolesAsync(user);
var userLogins = await _userManager.GetLoginsEmailInfoAsync(user);
var claims = await _userManager.GetClaimsAsync(user);
var emails = _userManager.GetEmails(user);
var existingRoles = await _userManager.GetRolesAsync(currentUser);
var missingRoles = roles.Where(role => !existingRoles.Contains(role));
await observer.Observe(async() => await _userManager.AddToRolesAsync(currentUser, missingRoles));
foreach (var login in userLogins)
{
await observer.Observe(async() =>
{
await _userManager.RemoveLoginAsync(user, login.UserLoginInfo.LoginProvider, login.UserLoginInfo.ProviderKey);
return(await _userManager.AddLoginAsync(currentUser, login.UserLoginInfo, login.Email));
});
}
foreach (var email in emails.Where(e => !userLogins.Any(l => l.Email.Equals(e.Email, StringComparison.InvariantCultureIgnoreCase))))
{
await observer.Observe(async() => await _userManager.AddEmailAsync(currentUser, email.Email, email.UserLoginInfo));
}
if (_options.Value.MergeUnconfirmedEmails || await _userManager.IsEmailConfirmedAsync(user))
{
var email = await _userManager.GetEmailAsync(user);
await observer.Observe(async() => await _userManager.AddEmailAsync(currentUser, email));
}
var existingClaims = await _userManager.GetClaimsAsync(currentUser);
var missingClaims = claims.Where(c =>
!existingClaims.Any(ec =>
c.Type.Equals(ec.Type, StringComparison.InvariantCultureIgnoreCase) &&
c.Value.Equals(ec.Value, StringComparison.InvariantCultureIgnoreCase)
));
await observer.Observe(async() => await _userManager.AddClaimsAsync(currentUser, missingClaims));
await observer.Observe(async() => await _userManager.DeleteAsync(user));
await _mergeUserEvents.MergeUser(currentUser, user);
transaction.Complete();
}
}
