UnivatePropertiesAPI/UnivateProperties_API/Repository/Financial/PaygateRepository.cs

using RestSharp;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using UnivateProperties_API.Context;
using UnivateProperties_API.Model.Financial;

namespace UnivateProperties_API.Repository.Financial
{
    public interface IPaygateRepository
    {
        string GoToPaymentGateway(Payment payment);
        string PaymentQuery(string id, Payment payment);
    }

    public class PaygateRepository: IPaygateRepository
    {
        private readonly DataContext _dbContext;

        public PaygateRepository(DataContext db)
        {
            _dbContext = db;
        }

        public string GoToPaymentGateway(Payment payment)
        {
            string utcDate = DateTime.UtcNow.ToString("yyyy-MM-dd H:mm:ss");
            var client = new RestClient("https://secure.paygate.co.za/payweb3/initiate.trans");
            client.Timeout = -1;
            var request = new RestRequest(Method.POST);
            var total = payment.Amount;
            string paygateId = "10011072130";
            string reff = "";
            Payment paymentObj = new Payment();
            if (payment.TimeshareWeekId != 0)
            {
                reff = payment.TimeshareWeekId.ToString();
                paymentObj.TimeshareWeekId = payment.TimeshareWeekId;
            }
            else
            {
                reff = payment.PropertyId.ToString();
                paymentObj.PropertyId = payment.PropertyId;
            }

            string amm = Math.Round((total * 100)).ToString();
            string currenc = "ZAR";
            string retUrl = "http://training.provision-sa.com:82/api/redirect";
            string transDate = utcDate;
            string loc = "en-za";
            string count = "ZAF";
            string mail = "jlouw365@gmail.com";
            request.AlwaysMultipartFormData = true;
            request.AddParameter("PAYGATE_ID", paygateId);
            request.AddParameter("REFERENCE", reff);
            request.AddParameter("AMOUNT", amm);
            request.AddParameter("CURRENCY", currenc);
            request.AddParameter("RETURN_URL", retUrl);
            request.AddParameter("TRANSACTION_DATE", transDate);
            request.AddParameter("LOCALE", loc);
            request.AddParameter("COUNTRY", count);
            request.AddParameter("EMAIL", mail);
            string checksum = Checksum(
                paygateId +
                reff +
                amm +
                currenc +
                retUrl +
                transDate +
                loc +
                count +
                mail +
                "secret");
            request.AddParameter("CHECKSUM", checksum);
            string gatewayReturn = client.Execute(request).Content.ToString();
            List<string> vs = gatewayReturn.Split('&').ToList();
            string payReqId = vs[1].Split('=')[1].ToString();
            string resultString = client.Execute(request).Content.ToString();
            var resultArr = resultString.Split('&');
            List<string> valueArr = new List<string>();
            foreach (var item in resultArr)
            {
                valueArr.Add(item.Split('=')[1]);
            }

            paymentObj.Amount = total;
            paymentObj.PayRequestId = valueArr[1];
            paymentObj.PaymentToken = valueArr[2];
            paymentObj.Checksum = valueArr[3];

            //PaymentQuery(paygateId, paymentObj);
           

            _dbContext.Payments.Add(paymentObj);
            _dbContext.SaveChanges();

            return resultString;
        }

        public string PaymentQuery(string paygateId, Payment payment)
        {
            var client = new RestClient("https://secure.paygate.co.za/payweb3/query.trans");
            client.Timeout = -1;
            var request = new RestRequest(Method.POST);
            request.AddParameter("PAYGATE_ID", paygateId);
            request.AddParameter("PAY_REQUEST_ID", payment.PayRequestId);
            request.AddParameter("REFERENCE", payment.PaymentToken);
            string checksum = Checksum(
                paygateId +
                payment.PayRequestId +
                payment.PaymentToken +
                "secret");
            request.AddParameter("CHECKSUM", checksum);
            string resultString = client.Execute(request).Content.ToString();
            var resultArr = resultString.Split('&');
            List<string> valueArr = new List<string>();
            string transactionResult = "";
            foreach (var item in resultArr)
            {
                valueArr.Add(item.Split('=')[1]);
            }

            switch (valueArr[4])
            {
                case "900001":
                    transactionResult = "Call for Approval";
                    break;
                case "900002":
                    transactionResult = "Card Expired";
                    break;
                case "900003":
                    transactionResult = "Insufficient Funds";
                    break;
                case "900004":
                    transactionResult = "Invalid Card Number";
                    break;
                case "900005": //Indicates a communications failure between the banks systems.
                    transactionResult = "Bank Interface Timeout";
                    break;
                case "900006":
                    transactionResult = "Invalid Card";
                    break;
                case "900007":
                    transactionResult = "Declined";
                    break;
                case "900009":
                    transactionResult = "Lost Card";
                    break;
                case "900010":
                    transactionResult = "Invalid Card Length";
                    break;
                case "900011":
                    transactionResult = "Suspected Fraud";
                    break;
                case "900012":
                    transactionResult = "Card Reported as Stolen";
                    break;
                case "900013":
                    transactionResult = "Restricted Card";
                    break;
                case "900014":
                    transactionResult = "Excessive Card Usage";
                    break;
                case "900015":
                    transactionResult = "Card Blacklisted";
                    break;
                case "990017":
                    transactionResult = "Auth Done";
                    break;
                case "900207": //Indicates the cardholder did not enter their MasterCard SecureCode / Verified by Visa password correctly.
                    transactionResult = "Declined; authentication failed";
                    break;
                case "990020":
                    transactionResult = "Auth Declined";
                    break;
                case "900210": //Indicates that the MasterCard SecureCode / Verified-by-Visa transaction has already been completed. Most likely caused by a customer clicking the refresh button.
                    transactionResult = "3D Secure Lookup Timeout";
                    break;
                case "991001":
                    transactionResult = "Invalid expiry date";
                    break;
                case "991002":
                    transactionResult = "Invalid Amount";
                    break;
                case "900205":
                    transactionResult = "Unexpected authentication result (phase 1)";
                    break;
                case "900206":
                    transactionResult = "Unexpected authentication result (phase 2)";
                    break;
                case "990001":
                    transactionResult = "Could not insert into Database";
                    break;
                case "990022":
                    transactionResult = "Bank not available";
                    break;
                case "990053":
                    transactionResult = "Error processing transaction";
                    break;
                case "900209": //Indicates the verification data returned from MasterCard SecureCode / Verified-by-Visa has been altered.
                    transactionResult = "Transaction verification failed (phase 2)";
                    break;
                case "900019":
                    transactionResult = "Invalid PayVault Scope";
                    break;
                case "990024":
                    transactionResult = "Duplicate Transaction Detected. Please check before submitting";
                    break;
                case "990028": //Customer clicks the ‘Cancel’ button on the payment page.
                    transactionResult = "Transaction cancelled";
                    break;
            }

            payment.PaymentStatus = transactionResult;
            _dbContext.Payments.Update(payment);
            _dbContext.SaveChanges();

            return resultString;
        }

        private string Checksum(string data)
        {
            using (var md5 = MD5.Create())
            {
                return BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(data)))
                    .Replace("-", string.Empty).ToLower();
            }
        }
    }
}