Sign up event from Azure B2C - azure

Question

How would I know that a person on my website has just completed the 'Sign Up' process in Azure B2C? Would I have to store my own list of object ids and check against it? I get the feeling I am going to have to do that in any case...

Answer 1

You receive the 'newUser' boolean claim if you have this selected in the signup policy. This will only be sent once, so you need to act on this.

Answer 2

Yes you need to store a list of object id's & verify accordingly in your business logic.

Answer 3

Managed to solve this...
Step 1 (Azure Portal)
In Azure Portal navigate to ADB2C, click on your Sign up and sign in policy
Click on Application claims and make sure to Tick the "User is new" claim
The "User is new" claim will be sent only if the user has just signed-up
Step 2 (Code)
//Using OpenIdConnectOptions
options.Events = new OpenIdConnectEvents()
{
OnRedirectToIdentityProvider = OnRedirectToIdentityProvider,
OnRemoteFailure = OnRemoteFailure,
OnAuthorizationCodeReceived = OnAuthorizationCodeReceived,
OnAuthenticationFailed = OnAuthenticationFailed,
OnMessageReceived = OnMessageReceived,
OnRedirectToIdentityProviderForSignOut = OnRedirectToIdentityProviderForSignOut,
OnRemoteSignOut = OnRemoteSignOut,
OnSignedOutCallbackRedirect = OnSignedOutCallbackRedirect,
OnTicketReceived = _onTicketReceivedInternal,
OnTokenResponseReceived = OnTokenResponseReceived,
OnTokenValidated = OnTokenValidated,
OnUserInformationReceived = OnUserInformationReceived
};
Notice the _onTicketReceivedInternal Task...
private Task _onTicketReceivedInternal(TicketReceivedContext context)
{
this.OnTicketReceived(context);
//Check if new user
Claim newUserClaim = context.Principal.Claims.ToList().FirstOrDefault(x => x.Type == "newUser");
bool newUser = newUserClaim == null ? false : true;
//Trigger event
if (newUser)
this.OnSignUp(context);
return Task.FromResult(0);
}
//Custom method OnSignUp where an application can do something on user sign up
protected virtual Task OnSignUp(TicketReceivedContext context)
{
return Task.FromResult(0);
}