doTransactionOperation method

@override Future<TransactionStatus> doTransactionOperation({ String? clientId, String? clientSecret, String? merchantTransactionId, String? designation, String? currencyCode, String? buyerName, String? buyerReference, String? notificationUrl, String? paymentMethodReference, int? amount, String? otp, })

Implementation

@override
Future<TransactionStatus> doTransactionOperation({
  String? clientId,
  String? clientSecret,
  String? merchantTransactionId,
  String? designation,
  String? currencyCode,
  String? buyerName,
  String? buyerReference,
  String? notificationUrl,
  String? paymentMethodReference,
  int? amount,
  String? otp}) async{

  AccessTokenResult accessTokenResult = await this.getAccessToken(clientId!, clientSecret!);

  if(accessTokenResult == null){
    final message =  'The requested service needs credentials, but the ones provided were invalid.';
    throw  new AdjeminPayAuthException(message,401);
  }

  final String url = "$API_URL/transactions";
  final http.Response response = await http.post(
      Uri.parse(url),
      body: <String, String>{
        "merchant_transaction_id": merchantTransactionId!,
        "designation": designation!,
        "buyer_name":buyerName ==null?"":buyerName,
        "buyer_reference":buyerReference!,
        "notification_url":notificationUrl!,
        "payment_method_reference":paymentMethodReference!,
        "amount":"$amount",
        "currency_code":currencyCode!,
        "otp":otp ==null?"":"$otp"
      },
      headers: {
        'Authorization' : 'Bearer ${accessTokenResult.accessToken}',
        'Accept':'application/json',
        'Content-Type': 'application/x-www-form-urlencoded'
      }
  );

  print("waiting for httpResponse !");
  print('============ Response Initiate Payment ==========');
  print("STATUS CODE: ${response.statusCode}");
  print('============ Response Initiate Payment status ==========');
  print("BODY: ${response.body}");

  if(response.statusCode == 200){
    final Map<String, dynamic> json = jsonDecode(response.body);
    final TransactionStatus result = TransactionStatus.fromJson(json);
    return result;
  }else{
    var message = StatusCode.messages[StatusCode.OPERATION_ERROR];
    var code = StatusCode.codes[StatusCode.OPERATION_ERROR];
    var status = StatusCode.OPERATION_ERROR;
    if(response.headers['content-type'] == 'application/json'){
      final Map<String, dynamic> json = jsonDecode(response.body);

      if(json.containsKey('message')){
        message = json['message'] as String;

      }

      if(json.containsKey('code')){
        code = json['code'] as int;
      }

      if(json.containsKey('status')){
        status = json['status'] as String;
      }

    }else{
      message  = "Payment has failed";
    }

    throw new AdjeminPayException(message, response.statusCode, code,status);
  }
}