exchangeToken method

@override Future<Map> exchangeToken(String clientId, String clientSecret, String code, String? codeVerifier, String grantType, String redirectUri,)

Implementation

@override
Future<Map> exchangeToken(String clientId, String clientSecret, String code,
    String? codeVerifier, String grantType, String redirectUri) async {
  final String baseUrl = await getBaseUrl;
  var url = Uri.parse("$baseUrl/oauth/token");
  var bodyData = {
    "client_id": clientId,
    "client_secret": clientSecret,
    "code": code,
    "grant_type": grantType,
    "redirect_uri": redirectUri
  };
  if (codeVerifier != null) {
    bodyData.addAll({"code_verifier": codeVerifier});
  }
  var jsonBody = jsonEncode(bodyData);
  var response = await http.post(
    url,
    headers: {"Content-Type": "application/x-www-form-urlencoded"},
    body: jsonBody,
  );
  var data = jsonDecode(response.body);
  return data;
}