signIn method

Future<GitHubSignInResult> signIn(BuildContext context)

Implementation

Future<GitHubSignInResult> signIn(BuildContext context) async {
  // let's authorize
  var authorizedResult = await Navigator.of(context).push(
    MaterialPageRoute(
      builder: (context) => GitHubSignInPage(
        url: _generateAuthorizedUrl(),
        redirectUrl: redirectUrl,
        userAgent: userAgent,
        clearCache: clearCache,
      ),
    ),
  );
  if (authorizedResult == null) {
    return GitHubSignInResult(
      GitHubSignInResultStatus.cancelled,
      errorMessage: "Sign In attempt has been cancelled.",
    );
  } else if (authorizedResult is Exception) {
    return GitHubSignInResult(
      GitHubSignInResultStatus.failed,
      errorMessage: authorizedResult.toString(),
    );
  }

  // exchange for access token
  String code = authorizedResult;
  var response = await http.post(
    Uri.parse(_githubAccessTokenUrl),
    headers: {"Accept": "application/json"},
    body: {
      "client_id": clientId,
      "client_secret": clientSecret,
      "code": code
    },
  );
  GitHubSignInResult result;
  if (response.statusCode == 200) {
    var body = json.decode(utf8.decode(response.bodyBytes));
    result = GitHubSignInResult(
      GitHubSignInResultStatus.ok,
      token: body["access_token"],
    );
  } else {
    result = GitHubSignInResult(
      GitHubSignInResultStatus.cancelled,
      errorMessage:
          "Unable to obtain token. Received: ${response.statusCode}",
    );
  }

  return result;
}