classifyCopilotPollResponse function

CopilotPollOutcome classifyCopilotPollResponse(Response response, { required String clientId, })

Classifies one device-flow poll response. Pure: 404 → endpointDisabled, a non-JSON body → transport, an access_token → success, otherwise the OAuth error field decides.

Implementation

CopilotPollOutcome classifyCopilotPollResponse(
  http.Response response, {
  required String clientId,
}) {
  if (response.statusCode == 404) {
    return CopilotPollFailure(
      _endpointDisabled(clientId, response.statusCode, response.body),
    );
  }
  final body = _decodeJsonObject(response);
  if (body == null) {
    return CopilotPollFailure(
      CopilotDeviceFlowError(
        CopilotDeviceFlowErrorKind.transport,
        'Copilot device-flow poll returned a non-JSON response '
        '(HTTP ${response.statusCode}): ${response.body.trim()}',
      ),
    );
  }
  final token = body['access_token'];
  if (token is String && token.isNotEmpty) return CopilotPollSuccess(token);
  return switch (body['error']) {
    'authorization_pending' => const CopilotPollPending(),
    'slow_down' => const CopilotPollSlowDown(),
    'expired_token' => const CopilotPollFailure(
      CopilotDeviceFlowError(
        CopilotDeviceFlowErrorKind.expired,
        'the device code expired (GitHub: expired_token) — start again',
      ),
    ),
    'access_denied' => const CopilotPollFailure(
      CopilotDeviceFlowError(
        CopilotDeviceFlowErrorKind.denied,
        'the authorization was denied (GitHub: access_denied)',
      ),
    ),
    final Object other => CopilotPollFailure(
      CopilotDeviceFlowError(
        CopilotDeviceFlowErrorKind.transport,
        'Copilot device-flow poll failed: ${response.body.trim()} '
        '(error: $other)',
      ),
    ),
    _ => CopilotPollFailure(
      CopilotDeviceFlowError(
        CopilotDeviceFlowErrorKind.transport,
        'Copilot device-flow poll returned no token and no error: '
        '${response.body.trim()}',
      ),
    ),
  };
}