public AzureADAuthRestResponse <AccessTokenClass, OAuthError> GetAccessToken_UserCredential(DatabaseManager dbmanager)
{
StateManager _stateIdManager = new StateManager(Config.LoggedInUserEmail, Config.Scope);
LocalStorageManager _localStorage = new LocalStorageManager(Config, dbmanager);
string _stateId = _stateIdManager.GetStateIdForCurrentUser(dbmanager);
var resp = new AzureADAuthRestResponse <AccessTokenClass, OAuthError>();
// try to look for the available token first
// if token not available then use authorize code to download it
// if token expires then download new token using refresh token and store in database
// if authorize token not available send send the response then auhorize token not available
AccessTokenClass token = _localStorage.GetAccessToken(_stateId);
if (token == null)
{
// check if authcode available
AuthCode authcode = _localStorage.GetAuthCode(_stateId);
if (authcode == null)
{
resp.OAuthError = OAuthErrors.AuthCodeNotFound;
return(resp);
}
var res = GetAccessToken(authcode.code, TokenRetrivalType.AuthorizationCode);
// check for any error in response
if (res.IsSucceeded)
{
token = res.Result;
_localStorage.AddAccessToken(_stateId, token);
// add token into database
}
else
{
// send status to front page that it is not authorized, authorization code has expired
resp.OAuthError = OAuthErrors.AuthCodeExpires;
return(resp);
}
}
// check for token's validity, if expires then recalculate from refresh token
if (!validateToken(token))
{
var res = GetAccessToken(token.RefreshToken, TokenRetrivalType.RefreshToken);
// check for any error, if error is not present then cast to
if (res.IsSucceeded)
{
token = res.Result;
_localStorage.UpdateAccessToken(_stateId, token);
}
}
resp.Result = token;
resp.OAuthError = OAuthErrors.None;
return(resp);
}