/// <summary>
/// Extracts the User details accessing the service as a unique id in the form
/// of "{authprovider}:{uniqueId}" using ProviderCrednetials for the logged
/// in user.
/// </summary>
/// <param name="principal">The principal accessing the service.</param>
/// <param name="request">The HttpRequest used to access the service.</param>
/// <returns>The unique user id.</returns>
public async Task <string> GetCurrentUserRegistrationReferenceAsync(ClaimsPrincipal principal, HttpRequestMessage request)
{
string provider = principal?.FindFirst("http://schemas.microsoft.com/identity/claims/identityprovider").Value;
ProviderCredentials creds = null;
if (string.Equals(provider, "facebook", StringComparison.OrdinalIgnoreCase))
{
creds = await principal.GetAppServiceIdentityAsync <FacebookCredentials>(request);
}
else if (string.Equals(provider, "google", StringComparison.OrdinalIgnoreCase))
{
creds = await principal.GetAppServiceIdentityAsync <GoogleCredentials>(request);
}
else if (string.Equals(provider, "twitter", StringComparison.OrdinalIgnoreCase))
{
creds = await principal.GetAppServiceIdentityAsync <TwitterCredentials>(request);
}
else if (string.Equals(provider, "microsoftaccount", StringComparison.OrdinalIgnoreCase))
{
creds = await principal.GetAppServiceIdentityAsync <MicrosoftAccountCredentials>(request);
}
if (creds == null)
{
throw ServiceExceptions.UserNullException();
}
// Format user details in the desired form of {authprovider}:{uniqueId}
string authProvider = creds.Provider;
string uniqueId = creds.UserClaims.FirstOrDefault(c => c.Type.Equals(ClaimTypes.NameIdentifier))?.Value;
var uniqueUserName = $"{authProvider}:{uniqueId}";
return(uniqueUserName);
}
