Subversion Repositories SmartDukaan

package in.shop2020.serving.controllers;

import in.shop2020.config.ConfigException;

import in.shop2020.datalogger.EventType;

import in.shop2020.payments.Attribute;

import in.shop2020.payments.Payment;

import in.shop2020.payments.PaymentException;

import in.shop2020.payments.PaymentStatus;

import in.shop2020.serving.services.CommonPaymentService;

import in.shop2020.serving.services.EbsPaymentService;

import in.shop2020.serving.services.IPaymentService;

import in.shop2020.serving.utils.ebs.Base64;

import in.shop2020.serving.utils.ebs.RC4;

import in.shop2020.thrift.clients.PaymentServiceClient;

import in.shop2020.thrift.clients.TransactionServiceClient;

import in.shop2020.thrift.clients.UserContextServiceClient;

import in.shop2020.thrift.clients.config.ConfigClient;

import in.shop2020.utils.DataLogger;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.StringTokenizer;

import java.util.TreeMap;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;

import org.apache.thrift.TException;

@SuppressWarnings("serial")

public class EbsPayResponseController extends BaseController{

	private static Logger log = Logger.getLogger(Class.class);

	private static final String FLAG_KEY = "IsFlagged";

	private static final String TXN_KEY = "TransactionID";

	private static final String AUTH_TXN_ID = "AuthTxnId";

	private static String successUrl;

	private static String errorUrl;

	/**

	 * The secret key used to decode RC4 encoded data.

	 */

	private static String accountKey;

	private String redirectUrl;

	static{

		try {

			successUrl = ConfigClient.getClient().get("ebs_success_url");

			errorUrl = ConfigClient.getClient().get("ebs_error_url");

			accountKey = ConfigClient.getClient().get("ebs_secret_key");

		} catch (ConfigException e) {

			log.error("Unable to get success and error usr info from config server.");

		}

	}

	private Map<String, String> paymentParams = new TreeMap<String, String>();

	public String index() {

		StringBuffer data1 = new StringBuffer(request.getParameter("DR"));

		log.info("Received data string: " + data1.toString());

		byte[] result = decodeRecvdData(data1);

		String recvString = parseRecvdData(result);

		updatePaymentParams(recvString);

		PaymentServiceClient paymentServiceClient = null;

		TransactionServiceClient transactionServiceClient = null;

		UserContextServiceClient userServiceClient = null;

		try {

			paymentServiceClient = new PaymentServiceClient();

			transactionServiceClient = new TransactionServiceClient();

			userServiceClient = new UserContextServiceClient();

		} catch (Exception e) {

			log.error("Unable to initialize one of the clients", e);

		}

		long merchantPaymentId = Long.parseLong(paymentParams.get("MerchantRefNo"));

		String gatewayPaymentId = paymentParams.get("PaymentID");

		double amount = Double.parseDouble(paymentParams.get("Amount"));

		String isFlagged = paymentParams.get(FLAG_KEY);

		String gatewayTxnStatus = paymentParams.get("ResponseCode");

		String description = paymentParams.get("ResponseMessage");

		String authTxnId = paymentParams.get(TXN_KEY);

		List<Attribute> attributes = new ArrayList<Attribute>();

		attributes.add(new Attribute(FLAG_KEY, isFlagged));

		attributes.add(new Attribute(AUTH_TXN_ID, authTxnId));

		Payment payment = null;

		Long txnId = null;

		try {

			payment = paymentServiceClient.getClient().getPayment(merchantPaymentId);

			txnId = payment.getMerchantTxnId();

		} catch (PaymentException e1) {

			log.error("Payment exception. It is serious, check merchant payment id + " + merchantPaymentId, e1);

		} catch (TException e1) {

			log.error("Thrift exception. Check payment id "+ merchantPaymentId, e1);

		}

		if(payment.getStatus() != PaymentStatus.INIT){

			// We have already processed a response for this payment. Processing

			// it again may fail his orders. So, let's ask him to check his

			// account.

			return "maybe";

		}

		if(!validatePaymentParams(amount, payment)){

			this.redirectUrl = errorUrl + "?paymentId=" + merchantPaymentId;

			return "index";

		}

		if(gatewayTxnStatus.equals("0")){

			//Update payment status as authorized

			try {

				paymentServiceClient.getClient().updatePaymentDetails(merchantPaymentId, gatewayPaymentId,

						"", gatewayTxnStatus, description, "", "", "", "", PaymentStatus.AUTHORIZED, "", attributes);

			} catch (PaymentException e) {

				log.error("Unable to mark the payment as authorized", e);

			} catch (TException e) {

			    log.error("Unable to mark the payment as authorized", e);

			}

			Map<String, String> captureResult = EbsPaymentService.capturePayment(payment, gatewayPaymentId);

			String captureStatus = captureResult.get(IPaymentService.STATUS);

			if("".equals(captureStatus)){

				//Failure

				description = captureResult.get(EbsPaymentService.ERROR);

				String errorCode = captureResult.get(EbsPaymentService.ERR_CODE);

				try {

					paymentServiceClient.getClient().updatePaymentDetails(merchantPaymentId, gatewayPaymentId,

							"", gatewayTxnStatus, description, "", "", "", errorCode, PaymentStatus.FAILED, "", attributes);

				} catch (PaymentException e) {

					log.error("Error while updating failed capture payment attempt: ", e);

				} catch (TException e) {

					log.error("Error while updating failed capture payment attempt: ", e);

				}

				DataLogger.logData(EventType.PAYMENT_FAILURE, session.getId(), userinfo.getUserId(), userinfo.getEmail(), Long.toString(merchantPaymentId), gatewayPaymentId,

                        gatewayTxnStatus, description, errorCode);

				this.redirectUrl = errorUrl + "?paymentId=" + merchantPaymentId;

			}else{

				//Success

				try {

					attributes.add(new Attribute(IPaymentService.CAPTURE_TXN_ID, captureResult.get(IPaymentService.CAPTURE_TXN_ID)));

					attributes.add(new Attribute(IPaymentService.CAPTURE_TIME, captureResult.get(IPaymentService.CAPTURE_TIME)));

					paymentServiceClient.getClient().updatePaymentDetails(merchantPaymentId, gatewayPaymentId,

							"", captureStatus, description, "", "", "", "", PaymentStatus.SUCCESS, "", attributes);

				} catch (PaymentException e) {

					log.error("Error while updating successful capture payment attempt: ", e);

				} catch (TException e) {

					log.error("Error while updating successful capture payment attempt: ", e);

				}

				CommonPaymentService.processSuccessfulTxn(txnId, userServiceClient, transactionServiceClient);

				this.redirectUrl = successUrl + "?paymentId=" + merchantPaymentId;

			}

		}else{

			try {

				paymentServiceClient.getClient().updatePaymentDetails(merchantPaymentId, gatewayPaymentId,

						"", gatewayTxnStatus, description, "", "", "", "", PaymentStatus.FAILED, "", attributes);

			} catch (PaymentException e) {

			    log.error("Unable to mark the payment as failed", e);

			} catch (TException e) {

			    log.error("Unable to mark the payment as failed", e);

			}

			CommonPaymentService.processFailedTxn(txnId, transactionServiceClient);

			DataLogger.logData(EventType.PAYMENT_FAILURE, session.getId(), userinfo.getUserId(), userinfo.getEmail(), Long.toString(merchantPaymentId), gatewayPaymentId,

                    gatewayTxnStatus, description);

			this.redirectUrl = errorUrl + "?paymentId=" + merchantPaymentId;

		}

		log.info("User will be redirected to: " + this.redirectUrl);

		return "index";

	}

	private boolean validatePaymentParams(double returnedAmount, Payment payment){

		if(!(payment != null && Math.abs(payment.getAmount() - returnedAmount) <= 0.50)){

			// We did not request this payment or the authorised amount is different.

			log.error("Checks and balance failed on returned data");

			return false;

		}

		return true;

	}

	private byte[] decodeRecvdData(StringBuffer data1) {

		for (int i = 0; i < data1.length(); i++) {

			if (data1.charAt(i) == ' ')

				data1.setCharAt(i, '+');

		}

		Base64 base64 = new Base64();

		byte[] data = base64.decode(data1.toString());

		RC4 rc4 = new RC4(accountKey);

		byte[] result = rc4.rc4(data);

		return result;

	}

	private String parseRecvdData(byte[] result) {

		ByteArrayInputStream byteIn = new ByteArrayInputStream(result, 0, result.length);

		BufferedReader reader = new BufferedReader(new InputStreamReader(byteIn));

		String recvString1 = "";

		String recvString = "";

		try {

			recvString1 = reader.readLine();

			int lineCount = 0;

			while (recvString1 != null) {

				lineCount++;

				if (lineCount > 705)

					break;

				recvString += recvString1 + "\n";

				recvString1 = reader.readLine();

			}

		} catch (IOException e) {

			log.error("Unable to read from Ebs response", e);

		}

		recvString = recvString.replace("=&", "=--&");

		return recvString;

	}

	private void updatePaymentParams(String str){

		StringTokenizer st = new StringTokenizer(str, "=&");

		String key, value;

		while(st.hasMoreTokens()) {

			key = st.nextToken();

			value = st.nextToken();

			log.info("Key: " + key + ", Value: " + value);

			paymentParams.put(key, value);

		}

	}

	public String getRedirectUrl(){

		return this.redirectUrl;

	}

	@Override

	public void setServletRequest(HttpServletRequest request) {

		this.request = request;

	}

	public Map<String, String> getPaymentParams() {

		return paymentParams;

	}

}