Subversion Repositories SmartDukaan

package in.shop2020.serving.controllers;

import in.shop2020.config.ConfigException;
import in.shop2020.payments.Attribute;
import in.shop2020.payments.Payment;
import in.shop2020.payments.PaymentException;
import in.shop2020.payments.PaymentStatus;
import in.shop2020.payments.PaymentService.Client;
import in.shop2020.serving.services.CommonPaymentService;
import in.shop2020.thrift.clients.PaymentClient;
import in.shop2020.thrift.clients.TransactionClient;
import in.shop2020.thrift.clients.UserClient;
import in.shop2020.thrift.clients.config.ConfigClient;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.thrift.TException;

public class HdfcEmiPayResponseController implements ServletRequestAware{

    /**
     * Enum of all statuses that can be returned by the HDFC gateway
     * 
     * @author Chandranshu
     * 
     */
    private enum PaymentReturnStatus{
        APPROVED("APPROVED"),
        NOT_APPROVED("NOT APPROVED"),
        CAPTURED("CAPTURED"),
        NOT_CAPTURED ("NOT CAPTURED"),
        CANCELLED ("CANCELLED"),
        DENIED_BY_RISK("DENIED BY RISK"),
        HOST_TIMEOUT("HOST TIMEOUT");
        private String value;
        PaymentReturnStatus(String value) {
            this.value = value;
        }
        public String value(){
            return this.value;
        }
    }
    
    HttpServletRequest request;

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

    public static String successUrl;
    public static String errorUrl;
    
    public static String AMOUNT = "amt";
    public static String TRACKID = "trackid";
    public static String RESULT = "result";
    public static String AUTH = "auth";
    public static String TRANID = "tranid";
    public static String PAYMENTID = "paymentid";
    public static String REF = "ref";
    public static String POSTDATE = "postdate";
    public static String ERROR = "Error";
    public static String ERRORTEXT = "ErrorText";
    public static String UDF5 = "udf5"; 

    static{
        try {
            successUrl = ConfigClient.getClient().get("emi_payment_success_url");
            errorUrl = ConfigClient.getClient().get("emi_payment_error_url");
        } catch (ConfigException e) {
            log.error("Unable to get success and error usr info from config server.");
        }
    }
    
    String redirectUrl;
    
    public HdfcEmiPayResponseController() {
        
    }

    /**
     * Sets the redirectUrl instance variable which is used in the view to
     * redirect the customer to the success or failure page.
     * 
     * @return index in all cases.
     * @throws IOException
     * @throws SecurityException
     */
    public String create() throws IOException, SecurityException{
        log.info("Inside hdfc pay response Create");
        
        PaymentClient paymentServiceClient = null;
        TransactionClient transactionServiceClient = null;
        UserClient userServiceClient = null;
        try{
            paymentServiceClient = new PaymentClient();
            transactionServiceClient = new TransactionClient();
            userServiceClient = new UserClient();
        }catch(Exception e){
            //Nothing to worry. lets move forward
            log.error("Unable to initialize one of the clients", e);
        }
        
        Long txnId = null;
        
        String paymentId = request.getParameter(PAYMENTID);
        String result = request.getParameter(RESULT);
        String trackId = request.getParameter(TRACKID);
        long merchantPaymentId = Long.parseLong(trackId);
        String amount = request.getParameter(AMOUNT);
        String errorText = request.getParameter(ERRORTEXT);
        
        //FIXME dump them somewhere
        String udf5=request.getParameter(UDF5);
        //FIXME hdfc is sending comma separated amount, which is very disappointing. May be we get more surprises moving forward.
        amount= amount.replace(",", "");
        
        //Setting redirect URL to the error URL value by default.
        this.redirectUrl = errorUrl + "?paymentId=" + merchantPaymentId;
        
        Client paymentClient = paymentServiceClient.getClient();
        Payment payment = null;
        try {
            payment = paymentClient.getPayment(merchantPaymentId);
            txnId = payment.getMerchantTxnId();
            
            if(!validatePaymentParams(paymentId, amount, udf5, payment))
                return "index";
        } 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 (result != null && result.trim().equals(PaymentReturnStatus.APPROVED.value())) {
            log.info("Payment " + merchantPaymentId + " authorized successfully. Updating the database.");
            String description = "Payment authorized";
            updatePaymentDetails(merchantPaymentId, description, PaymentStatus.AUTHORIZED, request, paymentClient);

            CommonPaymentService.processSuccessfulTxn(txnId, userServiceClient, transactionServiceClient);

            this.redirectUrl = successUrl + "?paymentId=" + merchantPaymentId;
        } else {
            updatePaymentDetails(merchantPaymentId, errorText, PaymentStatus.FAILED, request, paymentClient);

            CommonPaymentService.processFailedTxn(txnId, transactionServiceClient);

            this.redirectUrl = errorUrl + "?paymentId=" + merchantPaymentId;
        }
        
        return "index";
    }

    private boolean validatePaymentParams(String paymentId, String amount, String udf5, Payment payment) {
        long merchantPaymentId = payment.getPaymentId();
        String dbUdf5="";
        double dbAmount = payment.getAmount();
        for(Attribute attribute: payment.getAttributes()){
            if(attribute.getName().trim().equalsIgnoreCase(UDF5)){
                dbUdf5 = attribute.getValue();
            }
        }
        // verify 3 things:  udf5, amount and paymentid 
        double returnedAmount = Double.parseDouble(amount);
        log.info(paymentId+ ":"+ payment.getGatewayPaymentId() + "\n" + returnedAmount + ":" + dbAmount + "\n" + dbUdf5 + ":" + udf5 );
        if(!(paymentId.equalsIgnoreCase(payment.getGatewayPaymentId()) && (Math.abs(dbAmount - returnedAmount) <= 0.50) && udf5.equalsIgnoreCase(dbUdf5))){
            log.error("Checks and balance failed on returned data");
            this.redirectUrl =  errorUrl + "?paymentId="+merchantPaymentId;
            return false;
        }
        return true;
    }

    private void updatePaymentDetails(long merchantPaymentId, String message, PaymentStatus status, HttpServletRequest req, Client paymentClient) {
        String paymentId = request.getParameter(PAYMENTID);
        String result = request.getParameter(RESULT);
        String postdate = request.getParameter(POSTDATE);
        String tranId = request.getParameter(TRANID);
        String auth = request.getParameter(AUTH);
        String ref = request.getParameter(REF);
        
        String sessionId = request.getSession().getId();
        String errorNo = request.getParameter(ERROR);
        try {
            paymentClient.updatePaymentDetails(merchantPaymentId, paymentId, sessionId, result, message, tranId, auth, ref, errorNo, status, postdate, null);
        } catch (PaymentException e1) {
            log.error("Unable to update payment details in our database.", e1);
        } catch (TException e1) {
            log.error("Unable to update payment details in our database. Thrift exception.", e1);
        }
    }
    
    public String getRedirectUrl(){
        return this.redirectUrl;
    }

    @Override
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
        for(Object param: request.getParameterMap().keySet()){
            log.info("PARAMS: " + param + " = "+ request.getParameter((String)param));
        }
    }
}