GoogleAuthProviderHandler

GoogleAuthProviderHandler

global class GoogleAuthProviderHandler implements Auth.RegistrationHandler
{
    global boolean canCreateUser(Auth.UserData data)
    {
        // if no email is provided, we can't match with a Salesforce User
        if (!String.isBlank(data.email))
        {
            return true;
        }
        return false;
    }

    global User createUser(Id portalId, Auth.UserData data)
    {
        if (!canCreateUser(data))
        {
            // Returning null or throwing an exception fails the SSO flow
            return null;
        }

        return getUserForAuthUserData(data);
    }

    global void updateUser(Id userId, Id portalId, Auth.UserData data)
    {
    }

    private User getUserForAuthUserData(Auth.UserData data)
    {
        //Simple use case here, but might be a more complex check in the future
        return getUserByEmail(data.email);
    }

    private User getUserByEmail(String email)
    {
        User user;
        List<User> userList = [SELECT Id FROM User WHERE Email = :email];

        if(!userList.isEmpty())
        {
           user = userList[0];
        }

        return user;
    }
}