public async Task GetTokenAsync()

in src/ApiForFhirMigrationTool.Function/Security/BearerTokenHandler.cs [115:142]

26 lines of code
4 McCabe index (conditional complexity)


            public async Task<AccessToken> GetTokenAsync(string[] scopes, CancellationToken cancellationToken)
            {
                await _semaphoreSlim.WaitAsync(cancellationToken).ConfigureAwait(false);
                try
                {
                    if (_accessToken is null || _accessTokenExpiration <= DateTimeOffset.UtcNow + _tokenRefreshOffset)
                    {
                        try
                        {
                            _accessToken = await _tokenCredential.GetTokenAsync(new TokenRequestContext(scopes), cancellationToken).ConfigureAwait(false);
                            _accessTokenExpiration = _accessToken.Value.ExpiresOn;
                        }
                        catch (AuthenticationFailedException)
                        {
                            // If the token acquisition fails, retry after the delay.
                            await Task.Delay(_tokenRefreshRetryDelay, cancellationToken).ConfigureAwait(false);
                            _accessToken = await _tokenCredential.GetTokenAsync(new TokenRequestContext(scopes), cancellationToken).ConfigureAwait(false);
                            _accessTokenExpiration = _accessToken.Value.ExpiresOn;
                        }
                    }

                    return _accessToken.Value;
                }
                finally
                {
                    _semaphoreSlim.Release();
                }
            }